Aaru/Aaru.Devices/Device/ScsiCommands/ArchiveCorp.cs

// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : ArchiveCorp.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Archive Corp. vendor commands.
//
// --[ Description ] ----------------------------------------------------------
//
//     Contains vendor commands for Archive Corp. SCSI devices.
//
// --[ License ] --------------------------------------------------------------
//
//     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, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2021 Natalia Portillo
// ****************************************************************************/

using Aaru.Console;

namespace Aaru.Devices
{
    public sealed partial class Device
    {
        /// <summary>Gets the underlying drive cylinder, head and index bytes for the specified SCSI LBA.</summary>
        /// <param name="buffer">Buffer.</param>
        /// <param name="senseBuffer">Sense buffer.</param>
        /// <param name="lba">Address.</param>
        /// <param name="timeout">Timeout.</param>
        /// <param name="duration">Duration.</param>
        public bool ArchiveCorpRequestBlockAddress(out byte[] buffer, out byte[] senseBuffer, uint lba, uint timeout,
                                                   out double duration)
        {
            buffer = new byte[3];
            byte[] cdb = new byte[6];
            senseBuffer = new byte[64];

            cdb[0] = (byte)ScsiCommands.ArchiveRequestBlockAddress;
            cdb[1] = (byte)((lba & 0x1F0000) >> 16);
            cdb[2] = (byte)((lba & 0xFF00)   >> 8);
            cdb[3] = (byte)(lba & 0xFF);
            cdb[4] = 3;

            LastError = SendScsiCommand(cdb, ref buffer, out senseBuffer, timeout, ScsiDirection.In, out duration,
                                        out bool sense);

            Error = LastError != 0;

            AaruConsole.DebugWriteLine("SCSI Device", "ARCHIVE CORP. REQUEST BLOCK ADDRESS took {0} ms.", duration);

            return sense;
        }

        /// <summary>Gets the underlying drive cylinder, head and index bytes for the specified SCSI LBA.</summary>
        /// <param name="senseBuffer">Sense buffer.</param>
        /// <param name="lba">Logical Block Address, starting from 1.</param>
        /// <param name="timeout">Timeout.</param>
        /// <param name="duration">Duration.</param>
        public bool ArchiveCorpSeekBlock(out byte[] senseBuffer, uint lba, uint timeout, out double duration) =>
            ArchiveCorpSeekBlock(out senseBuffer, false, lba, timeout, out duration);

        /// <summary>Positions the tape at the specified block address</summary>
        /// <param name="senseBuffer">Sense buffer.</param>
        /// <param name="immediate">If set to <c>true</c>, return from the command immediately.</param>
        /// <param name="lba">Logical Block Address, starting from 1.</param>
        /// <param name="timeout">Timeout.</param>
        /// <param name="duration">Duration.</param>
        public bool ArchiveCorpSeekBlock(out byte[] senseBuffer, bool immediate, uint lba, uint timeout,
                                         out double duration)
        {
            byte[] buffer = new byte[0];
            byte[] cdb    = new byte[6];
            senseBuffer = new byte[64];

            cdb[0] = (byte)ScsiCommands.ArchiveSeekBlock;
            cdb[1] = (byte)((lba & 0x1F0000) >> 16);
            cdb[2] = (byte)((lba & 0xFF00)   >> 8);
            cdb[3] = (byte)(lba & 0xFF);

            if(immediate)
                cdb[1] += 0x01;

            LastError = SendScsiCommand(cdb, ref buffer, out senseBuffer, timeout, ScsiDirection.None, out duration,
                                        out bool sense);

            Error = LastError != 0;

            AaruConsole.DebugWriteLine("SCSI Device", "ARCHIVE CORP. SEEK BLOCK took {0} ms.", duration);

            return sense;
        }
    }
}