content: /*
   * © 2017 AgNO3 Gmbh & Co. KG
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   * 
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   * 
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  package jcifs.internal.smb2.io;
  
  
  import jcifs.Configuration;
  import jcifs.internal.SMBProtocolDecodingException;
  import jcifs.internal.smb2.ServerMessageBlock2Response;
  import jcifs.internal.smb2.Smb2Constants;
  import jcifs.internal.util.SMBUtil;
  import jcifs.smb.NtStatus;
  
  
  /**
   * @author mbechler
   *
   */
  public class Smb2ReadResponse extends ServerMessageBlock2Response {
  
      /**
       * 
       */
      public static final int OVERHEAD = Smb2Constants.SMB2_HEADER_LENGTH + 16;
  
      private int dataRemaining;
      private int dataLength;
      private byte[] outputBuffer;
      private int outputBufferOffset;
  
  
      /**
       * @param config
       * @param outputBufferOffset
       * @param outputBuffer
       */
      public Smb2ReadResponse ( Configuration config, byte[] outputBuffer, int outputBufferOffset ) {
          super(config);
          this.outputBuffer = outputBuffer;
          this.outputBufferOffset = outputBufferOffset;
      }
  
  
      /**
       * @return the dataLength
       */
      public int getDataLength () {
          return this.dataLength;
      }
  
  
      /**
       * @return the dataRemaining
       */
      public int getDataRemaining () {
          return this.dataRemaining;
      }
  
  
      /**
       * {@inheritDoc}
       *
       * @see jcifs.internal.smb2.ServerMessageBlock2#writeBytesWireFormat(byte[], int)
       */
      @Override
      protected int writeBytesWireFormat ( byte[] dst, int dstIndex ) {
          return 0;
      }
  
  
      /**
       * {@inheritDoc}
       *
       * @see jcifs.internal.smb2.ServerMessageBlock2#readBytesWireFormat(byte[], int)
       */
      @Override
      protected int readBytesWireFormat ( byte[] buffer, int bufferIndex ) throws SMBProtocolDecodingException {
          int start = bufferIndex;
          int structureSize = SMBUtil.readInt2(buffer, bufferIndex);
          if ( structureSize == 9 ) {
              return this.readErrorResponse(buffer, bufferIndex);
          }
          else if ( structureSize != 17 ) {
              throw new SMBProtocolDecodingException("Expected structureSize = 17");
          }
  
          short dataOffset = buffer[ bufferIndex + 2 ];
          bufferIndex += 4;
          this.dataLength = SMBUtil.readInt4(buffer, bufferIndex);
          bufferIndex += 4;
          this.dataRemaining = SMBUtil.readInt4(buffer, bufferIndex);
          bufferIndex += 4;
          bufferIndex += 4; // Reserved2
  
          int dataStart = getHeaderStart() + dataOffset;
  
          if ( this.dataLength + this.outputBufferOffset > this.outputBuffer.length ) {
              throw new SMBProtocolDecodingException("Buffer to small for read response");
          }
          System.arraycopy(buffer, dataStart, this.outputBuffer, this.outputBufferOffset, this.dataLength);
          bufferIndex = Math.max(bufferIndex, dataStart + this.dataLength);
          return bufferIndex - start;
      }
  
      /**
       * {@inheritDoc}
       *
       * @see jcifs.internal.smb2.ServerMessageBlock2#isErrorResponseStatus()
       */
      @Override
      protected boolean isErrorResponseStatus () {
          return getStatus() != NtStatus.NT_STATUS_BUFFER_OVERFLOW && super.isErrorResponseStatus();
      }
  
  
  }
  