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scsi_mode.c
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scsi_mode.c
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/***************************************************************************
Aaru Data Preservation Suite
----------------------------------------------------------------------------
Filename : scsi_mode.c
Author(s) : Natalia Portillo
Component : Aaru.Device.Report
--[ Description ] ----------------------------------------------------------
Contains decoders for SCSI MODE PAGEs.
--[ License ] --------------------------------------------------------------
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
----------------------------------------------------------------------------
Copyright © 2011-2020 Natalia Portillo
****************************************************************************/
#include <malloc.h>
#include <string.h>
#include <endian.h>
#include <stdint.h>
#include "scsi_mode.h"
ModeHeader *DecodeModeHeader10(unsigned char *modeResponse, uint8_t deviceType)
{
uint16_t blockDescLength = (uint16_t)((modeResponse[6] << 8) + modeResponse[7]);
int i;
ModeHeader *header = malloc(sizeof(ModeHeader));
memset(header, 0, sizeof(ModeHeader));
header->MediumType = modeResponse[2];
int longLBA = (modeResponse[4] & 0x01) == 0x01;
if(blockDescLength > 0)
{
if(longLBA)
{
header->descriptorsLength = blockDescLength / 16;
for(i = 0; i < header->descriptorsLength; i++)
{
header->BlockDescriptors[i].Density = 0x00;
header->BlockDescriptors[i].Blocks = be64toh((uint64_t)(*modeResponse + 0 + i * 16 + 8));
header->BlockDescriptors[i].BlockLength += (uint32_t)(modeResponse[15 + i * 16 + 8] << 24);
header->BlockDescriptors[i].BlockLength += (uint32_t)(modeResponse[14 + i * 16 + 8] << 16);
header->BlockDescriptors[i].BlockLength += (uint32_t)(modeResponse[13 + i * 16 + 8] << 8);
header->BlockDescriptors[i].BlockLength += modeResponse[12 + i * 16 + 8];
}
}
else
{
header->descriptorsLength = blockDescLength / 8;
for(i = 0; i < header->descriptorsLength; i++)
{
if(deviceType != 0x00)
{
header->BlockDescriptors[i].Density = modeResponse[0 + i * 8 + 8];
}
else
{
header->BlockDescriptors[i].Density = 0x00;
header->BlockDescriptors[i].Blocks += (uint64_t)(modeResponse[0 + i * 8 + 8] << 24);
}
header->BlockDescriptors[i].Blocks += (uint64_t)(modeResponse[1 + i * 8 + 8] << 16);
header->BlockDescriptors[i].Blocks += (uint64_t)(modeResponse[2 + i * 8 + 8] << 8);
header->BlockDescriptors[i].Blocks += modeResponse[3 + i * 8 + 8];
header->BlockDescriptors[i].BlockLength += (uint32_t)(modeResponse[5 + i * 8 + 8] << 16);
header->BlockDescriptors[i].BlockLength += (uint32_t)(modeResponse[6 + i * 8 + 8] << 8);
header->BlockDescriptors[i].BlockLength += modeResponse[7 + i * 8 + 8];
}
}
}
if(deviceType == 0x00 || deviceType == 0x05)
{
header->WriteProtected = ((modeResponse[3] & 0x80) == 0x80);
header->DPOFUA = ((modeResponse[3] & 0x10) == 0x10);
}
if(deviceType == 0x01)
{
header->WriteProtected = ((modeResponse[3] & 0x80) == 0x80);
header->Speed = (uint8_t)(modeResponse[3] & 0x0F);
header->BufferedMode = (uint8_t)((modeResponse[3] & 0x70) >> 4);
}
if(deviceType == 0x02)
header->BufferedMode = (uint8_t)((modeResponse[3] & 0x70) >> 4);
if(deviceType == 0x07)
{
header->WriteProtected = ((modeResponse[3] & 0x80) == 0x80);
header->EBC = ((modeResponse[3] & 0x01) == 0x01);
header->DPOFUA = ((modeResponse[3] & 0x10) == 0x10);
}
header->decoded = 1;
return header;
}
DecodedMode *DecodeMode10(unsigned char *modeResponse, uint8_t deviceType)
{
DecodedMode *decodedMode = malloc(sizeof(DecodedMode));
ModeHeader *hdrPtr = DecodeModeHeader10(modeResponse, deviceType);
memcpy(&(decodedMode->Header), hdrPtr, sizeof(ModeHeader));
free(hdrPtr);
if(!decodedMode->Header.decoded)
return decodedMode;
decodedMode->decoded = 1;
int longlba = (modeResponse[4] & 0x01) == 0x01;
int offset;
if(longlba)
offset = 8 + decodedMode->Header.descriptorsLength * 16;
else
offset = 8 + decodedMode->Header.descriptorsLength * 8;
int length = (modeResponse[0] << 8);
length += modeResponse[1];
length += 2;
while(offset < length)
{
int isSubpage = (modeResponse[offset] & 0x40) == 0x40;
uint8_t pageNo = (uint8_t)(modeResponse[offset] & 0x3F);
int subpage;
if(pageNo == 0)
{
decodedMode->pageSizes[0][0] = (size_t)(length - offset);
decodedMode->Pages[0][0] = malloc(decodedMode->pageSizes[0][0]);
memset(decodedMode->Pages[0][0], 0, decodedMode->pageSizes[0][0]);
memcpy(decodedMode->Pages[0][0], modeResponse + offset, decodedMode->pageSizes[0][0]);
offset += decodedMode->pageSizes[0][0];
}
else
{
if(isSubpage)
{
if(offset + 3 >= length)
break;
pageNo = (uint8_t)(modeResponse[offset] & 0x3F);
subpage = modeResponse[offset + 1];
decodedMode->pageSizes[pageNo][subpage] =
(size_t)((modeResponse[offset + 2] << 8) + modeResponse[offset + 3] + 4);
decodedMode->Pages[pageNo][subpage] = malloc(decodedMode->pageSizes[pageNo][subpage]);
memset(decodedMode->Pages[pageNo][subpage], 0, decodedMode->pageSizes[pageNo][subpage]);
memcpy(decodedMode->Pages[pageNo][subpage],
modeResponse + offset,
decodedMode->pageSizes[pageNo][subpage]);
offset += decodedMode->pageSizes[pageNo][subpage];
}
else
{
if(offset + 1 >= length)
break;
pageNo = (uint8_t)(modeResponse[offset] & 0x3F);
decodedMode->pageSizes[pageNo][0] = (size_t)(modeResponse[offset + 1] + 2);
decodedMode->Pages[pageNo][0] = malloc(decodedMode->pageSizes[pageNo][0]);
memset(decodedMode->Pages[pageNo][0], 0, decodedMode->pageSizes[pageNo][0]);
memcpy(decodedMode->Pages[pageNo][0], modeResponse + offset, decodedMode->pageSizes[pageNo][0]);
offset += decodedMode->pageSizes[pageNo][0];
}
}
}
return decodedMode;
}
ModeHeader *DecodeModeHeader6(unsigned char *modeResponse, uint8_t deviceType)
{
int i;
ModeHeader *header = malloc(sizeof(ModeHeader));
memset(header, 0, sizeof(ModeHeader));
if(modeResponse[3])
{
header->descriptorsLength = modeResponse[3] / 8;
for(i = 0; i < header->descriptorsLength; i++)
{
header->BlockDescriptors[i].Density = modeResponse[0 + i * 8 + 4];
header->BlockDescriptors[i].Blocks += (uint64_t)(modeResponse[1 + i * 8 + 4] << 16);
header->BlockDescriptors[i].Blocks += (uint64_t)(modeResponse[2 + i * 8 + 4] << 8);
header->BlockDescriptors[i].Blocks += modeResponse[3 + i * 8 + 4];
header->BlockDescriptors[i].BlockLength += (uint32_t)(modeResponse[5 + i * 8 + 4] << 16);
header->BlockDescriptors[i].BlockLength += (uint32_t)(modeResponse[6 + i * 8 + 4] << 8);
header->BlockDescriptors[i].BlockLength += modeResponse[7 + i * 8 + 4];
}
}
if(deviceType == 0x00 || deviceType == 0x05)
{
header->WriteProtected = ((modeResponse[2] & 0x80) == 0x80);
header->DPOFUA = ((modeResponse[2] & 0x10) == 0x10);
}
if(deviceType == 0x01)
{
header->WriteProtected = ((modeResponse[2] & 0x80) == 0x80);
header->Speed = (uint8_t)(modeResponse[2] & 0x0F);
header->BufferedMode = (uint8_t)((modeResponse[2] & 0x70) >> 4);
}
if(deviceType == 0x02)
header->BufferedMode = (uint8_t)((modeResponse[2] & 0x70) >> 4);
if(deviceType == 0x07)
{
header->WriteProtected = ((modeResponse[2] & 0x80) == 0x80);
header->EBC = ((modeResponse[2] & 0x01) == 0x01);
header->DPOFUA = ((modeResponse[2] & 0x10) == 0x10);
}
header->decoded = 1;
return header;
}
DecodedMode *DecodeMode6(unsigned char *modeResponse, uint8_t deviceType)
{
DecodedMode *decodedMode = malloc(sizeof(DecodedMode));
ModeHeader *hdrPtr = DecodeModeHeader6(modeResponse, deviceType);
memcpy(&(decodedMode->Header), hdrPtr, sizeof(ModeHeader));
free(hdrPtr);
if(!decodedMode->Header.decoded)
return decodedMode;
decodedMode->decoded = 1;
int offset = 4 + decodedMode->Header.descriptorsLength * 8;
int length = modeResponse[0] + 1;
while(offset < length)
{
int isSubpage = (modeResponse[offset] & 0x40) == 0x40;
uint8_t pageNo = (uint8_t)(modeResponse[offset] & 0x3F);
int subpage;
if(pageNo == 0)
{
decodedMode->pageSizes[0][0] = (size_t)(length - offset);
decodedMode->Pages[0][0] = malloc(decodedMode->pageSizes[0][0]);
memset(decodedMode->Pages[0][0], 0, decodedMode->pageSizes[0][0]);
memcpy(decodedMode->Pages[0][0], modeResponse + offset, decodedMode->pageSizes[0][0]);
offset += decodedMode->pageSizes[0][0];
}
else
{
if(isSubpage)
{
if(offset + 3 >= length)
break;
pageNo = (uint8_t)(modeResponse[offset] & 0x3F);
subpage = modeResponse[offset + 1];
decodedMode->pageSizes[pageNo][subpage] =
(size_t)((modeResponse[offset + 2] << 8) + modeResponse[offset + 3] + 4);
decodedMode->Pages[pageNo][subpage] = malloc(decodedMode->pageSizes[pageNo][subpage]);
memset(decodedMode->Pages[pageNo][subpage], 0, decodedMode->pageSizes[pageNo][subpage]);
memcpy(decodedMode->Pages[pageNo][subpage],
modeResponse + offset,
decodedMode->pageSizes[pageNo][subpage]);
offset += decodedMode->pageSizes[pageNo][subpage];
}
else
{
if(offset + 1 >= length)
break;
pageNo = (uint8_t)(modeResponse[offset] & 0x3F);
decodedMode->pageSizes[pageNo][0] = (size_t)(modeResponse[offset + 1] + 2);
decodedMode->Pages[pageNo][0] = malloc(decodedMode->pageSizes[pageNo][0]);
memset(decodedMode->Pages[pageNo][0], 0, decodedMode->pageSizes[pageNo][0]);
memcpy(decodedMode->Pages[pageNo][0], modeResponse + offset, decodedMode->pageSizes[pageNo][0]);
offset += decodedMode->pageSizes[pageNo][0];
}
}
}
return decodedMode;
}