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iin_nero.c
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iin_nero.c
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/*
* iin_nero.c
* $Id: iin_nero.c,v 1.10 2006/09/01 17:24:48 bobi Exp $
*
* Copyright 2004 Bobi B., [email protected]
*
* This file is part of hdl_dump.
*
* hdl_dump 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 2 of the License, or
* (at your option) any later version.
*
* hdl_dump 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 hdl_dump; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <assert.h>
#include <ctype.h>
#include <string.h>
#include "iin_nero.h"
#include "iin_img_base.h"
#include "osal.h"
#include "retcodes.h"
#include "aligned.h"
#include "common.h"
/* whether to make additional check for "NER5" in the header */
#define CHECK_NER5
typedef enum nero_data_mode_type {
ndm_mode1_plain = 0,
ndm_mode1_raw = 1,
ndm_mode2_plain = 2,
ndm_mode2_raw = 3
} nero_data_mode_t;
/* values for Nero found out by building test images */
static const u_int32_t RAW_SECTOR_SIZE[4] = {2048, 2352, 2048, 2352};
static const u_int32_t RAW_SKIP_OFFSET[4] = {0, 16, 0, 24};
/**************************************************************/
static int
probe_nero_image(osal_handle_t in,
u_int64_t file_size,
/*@out@*/ nero_data_mode_t *mode,
/*@out@*/ u_int32_t *header_length,
/*@out@*/ u_int32_t *footer_length)
{
char header[156];
int result;
if (file_size < 156)
return (RET_NOT_COMPAT);
result = osal_seek(in, file_size - 156);
if (result == OSAL_OK) { /* read header (located 156 bytes before end-of-file during my tests :-) ) */
u_int32_t len;
result = osal_read(in, header, 156, &len);
if (result == OSAL_OK)
result = len == 156 ? OSAL_OK : RET_NOT_COMPAT;
}
if (result == OSAL_OK)
result = (header[0x00] == 'C' &&
header[0x01] == 'U' &&
header[0x02] == 'E' &&
header[0x03] == 'X') ?
OSAL_OK :
RET_NOT_COMPAT;
#if defined(CHECK_NER5)
if (result == OSAL_OK)
result = (header[0x90] == 'N' &&
header[0x91] == 'E' &&
header[0x92] == 'R' &&
header[0x93] == '5') ?
OSAL_OK :
RET_NOT_COMPAT;
#endif /* CHECK_NER5 defined? */
if (result == OSAL_OK) {
int type = (unsigned char)header[0x54];
switch (type) { /* mode 1 */
case 0x00:
*mode = ndm_mode1_plain;
break;
case 0x05:
*mode = ndm_mode1_raw;
break;
/* mode 2 */
case 0x02:
*mode = ndm_mode2_plain;
break;
case 0x06:
*mode = ndm_mode2_raw;
break;
default:
result = RET_BAD_COMPAT;
}
}
if (result == OSAL_OK) {
*header_length = 150 * RAW_SECTOR_SIZE[*mode];
*footer_length = 156;
}
return (result);
}
/**************************************************************/
static int
probe_nero_track(osal_handle_t in,
u_int64_t file_size,
/*@out@*/ nero_data_mode_t *mode,
/*@out@*/ u_int32_t *header_length,
/*@out@*/ u_int32_t *footer_length)
{
/* NOTE: by some reason, Nero track file is one sector shorter than the Nero image file */
char header[72];
int result;
if (file_size < 72)
return (RET_NOT_COMPAT);
result = osal_seek(in, file_size - 72);
if (result == OSAL_OK) { /* read header (located 72 bytes before end-of-file during my tests :-) ) */
u_int32_t len;
result = osal_read(in, header, 72, &len);
if (result == OSAL_OK)
result = len == 72 ? OSAL_OK : RET_NOT_COMPAT;
}
if (result == OSAL_OK)
result = (header[0x00] == 'E' &&
header[0x01] == 'T' &&
header[0x02] == 'N' &&
header[0x03] == '2') ?
OSAL_OK :
RET_NOT_COMPAT;
#if defined(CHECK_NER5)
if (result == OSAL_OK)
result = (header[0x3C] == 'N' &&
header[0x3D] == 'E' &&
header[0x3E] == 'R' &&
header[0x3F] == '5') ?
OSAL_OK :
RET_NOT_COMPAT;
#endif /* CHECK_NER5 defined? */
if (result == OSAL_OK) {
*mode = ndm_mode1_plain;
*header_length = 0;
*footer_length = 72;
}
return (result);
}
/**************************************************************/
int iin_nero_probe_path(const char *path,
iin_t **iin)
{
u_int32_t device_sector_size;
osal_handle_t in;
u_int64_t file_size;
u_int32_t header_size = 0, footer_size = 0;
nero_data_mode_t mode = ndm_mode1_plain;
int result = osal_get_volume_sect_size(path, &device_sector_size);
if (result == OSAL_OK)
result = osal_open(path, &in, 0); /* do not disable cache yet */
if (result == OSAL_OK) {
result = osal_get_file_size(in, &file_size);
if (result == OSAL_OK) {
result = probe_nero_image(in, file_size,
&mode, &header_size, &footer_size);
if (result != OSAL_OK)
result = probe_nero_track(in, file_size,
&mode, &header_size, &footer_size);
}
osal_close(&in);
}
if (result == RET_OK) {
iin_img_base_t *img_base =
img_base_alloc(RAW_SECTOR_SIZE[mode], RAW_SKIP_OFFSET[mode]);
if (img_base != NULL)
result = img_base_add_part(img_base, path,
(u_int32_t)((file_size - header_size - footer_size) /
RAW_SECTOR_SIZE[mode]),
(u_int64_t)header_size, device_sector_size);
else
/* img_base_alloc failed */
result = RET_NO_MEM;
if (result == OSAL_OK) { /* success */
*iin = (iin_t *)img_base;
switch (mode) {
case ndm_mode1_plain:
strcpy((*iin)->source_type, "Nero Image, Mode 1, plain");
break;
case ndm_mode1_raw:
strcpy((*iin)->source_type, "Nero Image, Mode 1, RAW");
break;
case ndm_mode2_plain:
strcpy((*iin)->source_type, "Nero Image, Mode 2, plain");
break;
case ndm_mode2_raw:
strcpy((*iin)->source_type, "Nero Image, Mode 2, RAW");
break;
}
} else if (img_base != NULL)
((iin_t *)img_base)->close((iin_t *)img_base);
}
return (result);
}