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iin_gi.c
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/*
* iin_gi.c
* $Id: iin_gi.c,v 1.11 2006/09/01 17:25:47 bobi Exp $
*
* Copyright 2004 Bobi B., w1zard0f07@yahoo.com
*
* 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 <string.h>
#include "iin_gi.h"
#include "iin_img_base.h"
#include "osal.h"
#include "retcodes.h"
#include "common.h"
/* whether to make additional check for "0x11111111" in the header */
#define CHECK_11111111
typedef enum gi_data_mode_type {
gdm_mode1_plain = 0,
gdm_mode2_plain = 1
} gi_data_mode_t;
/* values for Global Image found out by building test images */
static const u_int32_t RAW_SECTOR_SIZE[2] = {2048, 2336};
static const u_int32_t RAW_SKIP_OFFSET[2] = {0, 8};
static const u_int32_t FILE_SIZES_OFFSET[4] = {0x9c, 0xa0, 0xa4, 0xa8}; /* BE, in sectors */
static const u_int32_t FILE_NAMES_OFFSET[4] = {0x00b0, 0x01b4, 0x02b8, 0x03bd};
/**************************************************************/
int iin_gi_probe_path(const char *path,
iin_t **iin)
{
u_int32_t device_sector_size;
osal_handle_t in;
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) {
int single_file = 0;
gi_data_mode_t mode;
u_int32_t len;
unsigned char header[1476];
iin_img_base_t *img_base = NULL;
u_int32_t num_sectors;
result = osal_read(in, header, 1476, &len);
if (result == OSAL_OK)
result = (header[0x00] == 0xda &&
header[0x01] == 0xda &&
header[0x02] == 0xfe &&
header[0x03] == 0xfe) ?
OSAL_OK :
RET_NOT_COMPAT;
#if defined(CHECK_11111111)
if (result == OSAL_OK)
result = (header[0x14] == 0x11 &&
header[0x15] == 0x11 &&
header[0x16] == 0x11 &&
header[0x17] == 0x11) ?
OSAL_OK :
RET_NOT_COMPAT;
#endif /* CHECK_11111111 defined? */
if (result == OSAL_OK) { /* check whether image is one or multiple parts */
if (header[0x62] == 0x22 &&
header[0x63] == 0x22 &&
header[0x64] == 0x22 &&
header[0x65] == 0x22)
single_file = 1;
else if (header[0x62] == 0x88 &&
header[0x63] == 0x88 &&
header[0x64] == 0x88 &&
header[0x65] == 0x88)
single_file = 0;
else
result = RET_BAD_COMPAT;
}
mode = gdm_mode1_plain;
if (result == OSAL_OK) { /* mode1/mode2? */
switch (header[0x7e]) {
case 0x01:
mode = gdm_mode1_plain;
break;
case 0x02:
mode = gdm_mode2_plain;
break;
default:
result = RET_BAD_COMPAT;
}
if (result == OSAL_OK) { /* total number of sectors */
num_sectors = (header[0x37] << 24 |
header[0x36] << 16 |
header[0x35] << 8 |
header[0x34]);
result = (num_sectors == (header[0x3b] << 24 |
header[0x3a] << 16 |
header[0x39] << 8 |
header[0x38]) &&
num_sectors == (header[0x7d] << 24 |
header[0x7c] << 16 |
header[0x7b] << 8 |
header[0x7a])) ?
OSAL_OK :
RET_BAD_COMPAT;
}
}
if (result == OSAL_OK) {
img_base = img_base_alloc(RAW_SECTOR_SIZE[mode], RAW_SKIP_OFFSET[mode]);
result = img_base != NULL ? OSAL_OK : RET_NO_MEM;
}
if (result == OSAL_OK) {
if (single_file)
/* single file only -> CD image or DVD image with size less than 2GB */
result = img_base_add_part(img_base, path, num_sectors,
(u_int64_t)152, device_sector_size);
else { /* multiple files */
u_int32_t num_files = header[0x98], i;
for (i = 0; i < num_files; ++i) {
/* char source [MAX_PATH];*/
char source[260];
u_int32_t length_s = (header[FILE_SIZES_OFFSET[i] + 3] << 24 |
header[FILE_SIZES_OFFSET[i] + 2] << 16 |
header[FILE_SIZES_OFFSET[i] + 1] << 8 |
header[FILE_SIZES_OFFSET[i]]);
strncpy(source, (const char *)header + FILE_NAMES_OFFSET[i], 0x0104);
source[0x0103] = '\0';
result = lookup_file(source, path);
if (result == RET_OK)
; /* linked file found */
else if (result == RET_FILE_NOT_FOUND)
result = RET_BROKEN_LINK;
if (result == RET_OK)
result = osal_get_volume_sect_size(source, &device_sector_size);
if (result == RET_OK)
result = img_base_add_part(img_base, source, length_s,
(u_int64_t)0, device_sector_size);
}
}
}
if (result == OSAL_OK) {
*iin = (iin_t *)img_base;
switch (mode) {
case gdm_mode1_plain:
strcpy((*iin)->source_type, "Global Image, Mode1");
break;
case gdm_mode2_plain:
strcpy((*iin)->source_type, "Global Image, Mode2");
break;
}
} else if (img_base != NULL)
((iin_t *)img_base)->close((iin_t *)img_base);
osal_close(&in);
}
return (result);
}