1 package org.jscsi.target.scsi.cdb;
2
3
4 import java.nio.ByteBuffer;
5
6 import org.jscsi.target.util.BitManip;
7
8
9 /**
10 * This class represents Command Descriptor Blocks for the <code>REQUEST SENSE</code> SCSI command, which requests that
11 * the device server transfers sense data to the application client.
12 *
13 * @author Andreas Ergenzinger
14 */
15 public final class RequestSenseCdb extends CommandDescriptorBlock {
16
17 /**
18 * The descriptor format (DESC) bit specifies which sense data format shall be returned. If DESC is set to zero,
19 * fixed format sense data shall be returned. If DESC is set to one and descriptor format sense data is supported,
20 * descriptor format sense data shall be returned.
21 */
22 private final boolean descriptorFormat;
23
24 /**
25 * The ALLOCATION LENGTH field specifies the maximum number of bytes that an application client has allocated in the
26 * Data-In Buffer.
27 */
28 private final int allocationLength;
29
30 public RequestSenseCdb (ByteBuffer buffer) {
31 super(buffer);
32
33 // descriptor format
34 descriptorFormat = BitManip.getBit(buffer.get(1), 0);
35
36 // allocation length
37 allocationLength = buffer.get(4) & 255;
38 }
39
40 public final boolean getDescriptorFormat () {
41 return descriptorFormat;
42 }
43
44 public final int getAllocationLength () {
45 return allocationLength;
46 }
47 }