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libxmount_morphing_unallocated.h
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libxmount_morphing_unallocated.h
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/*******************************************************************************
* xmount Copyright (c) 2008-2014 by Gillen Daniel <gillen.dan@pinguin.lu> *
* *
* 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/>. *
*******************************************************************************/
#ifndef LIBXMOUNT_MORPHING_UNALLOCATED_H
#define LIBXMOUNT_MORPHING_UNALLOCATED_H
#define LOG_ERROR(...) { \
LibXmount_Morphing_LogMessage("ERROR", \
(char*)__FUNCTION__, \
__LINE__, \
__VA_ARGS__); \
}
#define LOG_WARNING(...) { \
LibXmount_Morphing_LogMessage("WARNING", \
(char*)__FUNCTION__, \
__LINE__, \
__VA_ARGS__); \
}
#define LOG_DEBUG(...) { \
if(p_unallocated_handle->debug==1) \
LibXmount_Morphing_LogMessage("DEBUG", \
(char*)__FUNCTION__, \
__LINE__, \
__VA_ARGS__); \
}
/*******************************************************************************
* Enums, type defs, etc...
******************************************************************************/
// Error codes
enum {
UNALLOCATED_OK=0,
UNALLOCATED_MEMALLOC_FAILED,
UNALLOCATED_NO_SUPPORTED_FS_DETECTED,
UNALLOCATED_UNSUPPORTED_FS_SPECIFIED,
UNALLOCATED_INTERNAL_ERROR,
UNALLOCATED_CANNOT_GET_IMAGECOUNT,
UNALLOCATED_WRONG_INPUT_IMAGE_COUNT,
UNALLOCATED_CANNOT_GET_IMAGESIZE,
UNALLOCATED_READ_BEYOND_END_OF_IMAGE,
UNALLOCATED_CANNOT_READ_DATA,
UNALLOCATED_CANNOT_PARSE_OPTION,
UNALLOCATED_CANNOT_READ_HFSPLUS_HEADER,
UNALLOCATED_INVALID_HFSPLUS_HEADER,
UNALLOCATED_CANNOT_READ_HFSPLUS_ALLOC_FILE,
UNALLOCATED_ALLOC_FILE_HAS_TOO_MUCH_EXTENDS,
UNALLOCATED_INVALID_FAT_HEADER
};
// Supported fs types
typedef enum e_UnallocatedFsType {
UnallocatedFsType_Unknown=0,
UnallocatedFsType_HfsPlus,
UnallocatedFsType_Fat12,
UnallocatedFsType_Fat16,
UnallocatedFsType_Fat32
} te_UnallocatedFsType;
// HFS+ extend
typedef struct s_HfsPlusExtend {
uint32_t start_block;
uint32_t block_count;
} __attribute__ ((packed)) ts_HfsPlusExtend, *pts_HfsPlusExtend;
// Needed parts of the HFS+ volume header
#define HFSPLUS_VH_OFFSET 1024
#define HFSPLUS_VH_SIGNATURE 0x482b //"H+"
#define HFSPLUS_VH_VERSION 4
typedef struct s_HfsPlusVH {
uint16_t signature; // "H+"
uint16_t version; // Currently 4 for HFS+
uint32_t unused01[9];
uint32_t block_size;
uint32_t total_blocks;
uint32_t free_blocks;
uint32_t unused02[15];
uint64_t alloc_file_size;
uint32_t alloc_file_clump_size;
uint32_t alloc_file_total_blocks;
ts_HfsPlusExtend alloc_file_extends[8];
} __attribute__ ((packed)) ts_HfsPlusVH, *pts_HfsPlusVH;
// Needed parts of the FAT volume header
typedef struct s_FatVH {
uint8_t jump_inst[3];
uint8_t oem_name[8];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t fat_count;
uint16_t root_entry_count;
uint16_t total_sectors_16;
uint8_t media_type;
uint16_t fat16_sectors;
uint64_t unused01;
uint32_t total_sectors_32;
// Following value is only valid for FAT32
uint32_t fat32_sectors;
} __attribute__ ((packed)) ts_FatVH, *pts_FatVH;
// Handle
typedef struct s_UnallocatedHandle {
uint8_t debug;
te_UnallocatedFsType fs_type;
pts_LibXmountMorphingInputFunctions p_input_functions;
uint64_t block_size;
uint64_t free_block_map_size;
uint64_t *p_free_block_map;
uint64_t morphed_image_size;
union {
pts_HfsPlusVH p_hfsplus_vh;
pts_FatVH p_fat_vh;
};
} ts_UnallocatedHandle, *pts_UnallocatedHandle;
/*******************************************************************************
* Forward declarations
******************************************************************************/
static int UnallocatedCreateHandle(void **pp_handle,
const char *p_format,
uint8_t debug);
static int UnallocatedDestroyHandle(void **pp_handle);
static int UnallocatedMorph(
void *p_handle,
pts_LibXmountMorphingInputFunctions p_input_functions);
static int UnallocatedSize(void *p_handle,
uint64_t *p_size);
static int UnallocatedRead(void *p_handle,
char *p_buf,
off_t offset,
size_t count,
size_t *p_read);
static int UnallocatedOptionsHelp(const char **pp_help);
static int UnallocatedOptionsParse(void *p_handle,
uint32_t options_count,
const pts_LibXmountOptions *pp_options,
const char **pp_error);
static int UnallocatedGetInfofileContent(void *p_handle,
const char **pp_info_buf);
static const char* UnallocatedGetErrorMessage(int err_num);
static void UnallocatedFreeBuffer(void *p_buf);
// Helper functions
static int DetectFs(pts_UnallocatedHandle p_unallocated_handle);
// Helper functions for HFS
static int ReadHfsPlusHeader(pts_UnallocatedHandle p_unallocated_handle);
static int ReadHfsPlusAllocFile(pts_UnallocatedHandle p_unallocated_handle,
uint8_t **pp_alloc_file);
static int BuildHfsPlusBlockMap(pts_UnallocatedHandle p_unallocated_handle,
uint8_t *p_alloc_file);
// Helper functions for FAT
static int ReadFatHeader(pts_UnallocatedHandle p_unallocated_handle);
#endif // LIBXMOUNT_MORPHING_UNALLOCATED_H

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