2015-10-12 06:39:31 +01:00
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Command.cs
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// Version : 1.0
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// Author(s) : Natalia Portillo
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//
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// Component : Linux direct device access
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//
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// Revision : $Revision$
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// Last change by : $Author$
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// Date : $Date$
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Contains a high level representation of the Linux syscalls used to directly
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// interface devices
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright (C) 2011-2015 Claunia.com
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// ****************************************************************************/
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// //$Id$
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using System;
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2015-10-12 06:25:49 +01:00
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using System.Runtime.InteropServices;
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namespace DiscImageChef.Devices.Linux
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{
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static class Command
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{
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internal static int SendScsiCommand(int fd, byte[] cdb, ref byte[] buffer, out byte[] senseBuffer, uint timeout, ScsiIoctlDirection direction, out double duration, out bool sense)
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{
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senseBuffer = null;
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duration = 0;
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sense = false;
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if (buffer == null)
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return -1;
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sg_io_hdr_t io_hdr = new sg_io_hdr_t();
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senseBuffer = new byte[32];
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io_hdr.interface_id = 'S';
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io_hdr.cmd_len = (byte)cdb.Length;
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io_hdr.mx_sb_len = (byte)senseBuffer.Length;
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io_hdr.dxfer_direction = direction;
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io_hdr.dxfer_len = (uint)buffer.Length;
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io_hdr.dxferp = Marshal.AllocHGlobal(buffer.Length);
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io_hdr.cmdp = Marshal.AllocHGlobal(cdb.Length);
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io_hdr.sbp = Marshal.AllocHGlobal(senseBuffer.Length);
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io_hdr.timeout = timeout * 1000;
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Marshal.Copy(buffer, 0, io_hdr.dxferp, buffer.Length);
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Marshal.Copy(cdb, 0, io_hdr.cmdp, cdb.Length);
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Marshal.Copy(senseBuffer, 0, io_hdr.sbp, senseBuffer.Length);
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int error = Extern.ioctlSg(fd, LinuxIoctl.SG_IO, ref io_hdr);
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if (error < 0)
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error = Marshal.GetLastWin32Error();
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Marshal.Copy(io_hdr.dxferp, buffer, 0, buffer.Length);
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Marshal.Copy(io_hdr.cmdp, cdb, 0, cdb.Length);
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Marshal.Copy(io_hdr.sbp, senseBuffer, 0, senseBuffer.Length);
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sense |= (io_hdr.info & SgInfo.OkMask) != SgInfo.Ok;
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duration = (double)io_hdr.duration;
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return error;
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}
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}
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}
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