libodraw_io_handle.c
No OneTemporary
Actions

Size

16 KB

Referenced Files

None

Subscribers

None

libodraw_io_handle.c
View Options

	/*
	* Input/Output (IO) handle functions
	*
	* Copyright (c) 2010-2011, Joachim Metz <jbmetz@users.sourceforge.net>
	*
	* Refer to AUTHORS for acknowledgements.
	*
	* This software is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Lesser General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* This software 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 Lesser General Public License
	* along with this software. If not, see <http://www.gnu.org/licenses/>.
	*/

	#include <common.h>
	#include <memory.h>
	#include <types.h>

	#include <liberror.h>
	#include <libnotify.h>

	#include "libodraw_definitions.h"
	#include "libodraw_codepage.h"
	#include "libodraw_io_handle.h"

	#define libodraw_optical_disk_copy_msf_to_lba( minutes, seconds, frames, lba ) \
	lba = minutes; \
	lba *= 60; \
	lba += seconds; \
	lba *= 75; \
	lba += frames; \
	lba -= 150;

	static uint8_t libodraw_sector_synchronisation_data[ 12 ] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };

	/* Initialize an IO handle
	* Make sure the value io_handle is pointing to is set to NULL
	* Returns 1 if successful or -1 on error
	*/
	int libodraw_io_handle_initialize(
	libodraw_io_handle_t **io_handle,
	liberror_error_t **error )
	{
	static char *function = "libodraw_io_handle_initialize";

	if( io_handle == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_ARGUMENTS,
	LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
	"%s: invalid IO handle.",
	function );

	return( -1 );
	}
	if( *io_handle == NULL )
	{
	*io_handle = memory_allocate_structure(
	libodraw_io_handle_t );

	if( *io_handle == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_INSUFFICIENT,
	"%s: unable to create IO handle.",
	function );

	goto on_error;
	}
	if( memory_set(
	*io_handle,
	0,
	sizeof( libodraw_io_handle_t ) ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_SET_FAILED,
	"%s: unable to clear file.",
	function );

	goto on_error;
	}
	( *io_handle )->bytes_per_sector = 2048;
	( *io_handle )->ascii_codepage = LIBODRAW_CODEPAGE_WINDOWS_1252;
	}
	return( 1 );

	on_error:
	if( *io_handle != NULL )
	{
	memory_free(
	*io_handle );

	*io_handle = NULL;
	}
	return( -1 );
	}

	/* Frees an IO handle
	* Returns 1 if successful or -1 on error
	*/
	int libodraw_io_handle_free(
	libodraw_io_handle_t **io_handle,
	liberror_error_t **error )
	{
	static char *function = "libodraw_io_handle_free";

	if( io_handle == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_ARGUMENTS,
	LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
	"%s: invalid IO handle.",
	function );

	return( -1 );
	}
	if( *io_handle != NULL )
	{
	memory_free(
	*io_handle );

	*io_handle = NULL;
	}
	return( 1 );
	}

	/* Copies the sector data to the buffer
	* Returns the number of bytes copied if successful or -1 on error
	*/
	ssize_t libodraw_io_handle_copy_sector_data_to_buffer(
	libodraw_io_handle_t *io_handle,
	const uint8_t *sector_data,
	size_t sector_data_size,
	uint32_t bytes_per_sector,
	uint8_t track_type,
	uint8_t *buffer,
	size_t buffer_size,
	uint32_t sector_index,
	uint32_t sector_offset,
	liberror_error_t **error )
	{
	static char *function = "libodraw_io_handle_copy_sector_data_to_buffer";
	size_t buffer_offset = 0;
	size_t read_size = 0;
	size_t sector_data_offset = 0;
	uint32_t sector_lba = 0;

	#if defined( HAVE_DEBUG_OUTPUT )
	uint8_t sector_mode = 0;
	#endif

	if( io_handle == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_ARGUMENTS,
	LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
	"%s: invalid IO handle.",
	function );

	return( -1 );
	}
	if( sector_data == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_ARGUMENTS,
	LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
	"%s: invalid sector data.",
	function );

	return( -1 );
	}
	if( sector_data_size > (size_t) SSIZE_MAX )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_RUNTIME,
	LIBERROR_RUNTIME_ERROR_VALUE_EXCEEDS_MAXIMUM,
	"%s: invalid sector data size value exceeds maximum.",
	function );

	return( -1 );
	}
	if( buffer == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_ARGUMENTS,
	LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
	"%s: invalid buffer.",
	function );

	return( -1 );
	}
	if( buffer_size > (size_t) SSIZE_MAX )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_RUNTIME,
	LIBERROR_RUNTIME_ERROR_VALUE_EXCEEDS_MAXIMUM,
	"%s: invalid buffer size value exceeds maximum.",
	function );

	return( -1 );
	}
	if( ( (size_t) sector_offset >= sector_data_size )
	\|\| ( sector_offset >= io_handle->bytes_per_sector ) )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_RUNTIME,
	LIBERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
	"%s: invalid sector offset value out of bounds.",
	function );

	return( -1 );
	}
	while( sector_data_offset < sector_data_size )
	{
	if( io_handle->bytes_per_sector == 2048 )
	{
	if( ( track_type == LIBODRAW_TRACK_TYPE_MODE1_2352 )
	\|\| ( track_type == LIBODRAW_TRACK_TYPE_MODE2_2352 ) )
	{
	if( ( sector_data_offset + 16 ) >= sector_data_size )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_RUNTIME,
	LIBERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
	"%s: sector data too small.",
	function );

	return( -1 );
	}
	#if defined( HAVE_DEBUG_OUTPUT )
	if( libnotify_verbose != 0 )
	{
	libnotify_printf(
	"%s: sector: %" PRIu32 " header:\n",
	function,
	sector_index );
	libnotify_print_data(
	&( sector_data[ sector_data_offset ] ),
	16 );
	}
	#endif
	if( memory_compare(
	&( sector_data[ sector_data_offset ] ),
	libodraw_sector_synchronisation_data,
	12 ) != 0 )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_INPUT,
	LIBERROR_INPUT_ERROR_VALUE_MISMATCH,
	"%s: unsupported sector synchronisation data.",
	function );

	return( -1 );
	}
	#if defined( HAVE_DEBUG_OUTPUT )
	if( libnotify_verbose != 0 )
	{
	libnotify_printf(
	"%s: sector: %" PRIu32 " synchronisation data:\n",
	function,
	sector_index );
	libnotify_print_data(
	&( sector_data[ sector_data_offset ] ),
	12 );
	}
	#endif
	sector_data_offset += 12;

	libodraw_optical_disk_copy_msf_to_lba(
	sector_data[ sector_data_offset ],
	sector_data[ sector_data_offset + 1 ],
	sector_data[ sector_data_offset + 2 ],
	sector_lba );

	#if defined( HAVE_DEBUG_OUTPUT )
	sector_mode = sector_data[ sector_data_offset + 3 ] & 0x03;

	if( libnotify_verbose != 0 )
	{
	libnotify_printf(
	"%s: sector: %" PRIu32 " MSF\t\t: %02" PRIu8 ":%02" PRIu8 ":%02" PRIu8 " (%" PRIu32 ")\n",
	function,
	sector_index,
	sector_data[ sector_data_offset ],
	sector_data[ sector_data_offset + 1 ],
	sector_data[ sector_data_offset + 2 ],
	sector_lba );

	libnotify_printf(
	"%s: sector: %" PRIu32 " mode bits\t: 0x%02" PRIx8 "\n",
	function,
	sector_index,
	sector_data[ sector_data_offset + 3 ] );
	}
	#endif
	#if defined( HAVE_VERBOSE_OUTPUT )
	if( sector_lba != sector_index )
	{
	libnotify_printf(
	"%s: sector MSF (LBA) does not match current.\n",
	function );
	}
	if( ( ( track_type == LIBODRAW_TRACK_TYPE_MODE1_2352 )
	&& ( sector_mode != 1 ) )
	\|\| ( ( track_type == LIBODRAW_TRACK_TYPE_MODE2_2352 )
	&& ( sector_mode != 2 ) ) )
	{
	libnotify_printf(
	"%s: sector mode does not match table of contents.\n",
	function );
	}
	#endif
	sector_data_offset += 4;
	}
	else if( bytes_per_sector == 2352 )
	{
	sector_data_offset += 16;
	}
	if( ( track_type == LIBODRAW_TRACK_TYPE_MODE2_2336 )
	\|\| ( track_type == LIBODRAW_TRACK_TYPE_MODE2_2352 ) )
	{
	if( ( sector_data[ sector_data_offset ] != sector_data[ sector_data_offset + 4 ] )
	\|\| ( sector_data[ sector_data_offset + 1 ] != sector_data[ sector_data_offset + 5 ] )
	\|\| ( sector_data[ sector_data_offset + 2 ] != sector_data[ sector_data_offset + 6 ] )
	\|\| ( sector_data[ sector_data_offset + 3 ] != sector_data[ sector_data_offset + 7 ] ) )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_INPUT,
	LIBERROR_INPUT_ERROR_VALUE_MISMATCH,
	"%s: unsupported or corrupt XA sub-header.",
	function );

	return( -1 );
	}
	if( sector_data[ sector_data_offset + 1 ] >= 32 )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_INPUT,
	LIBERROR_INPUT_ERROR_VALUE_MISMATCH,
	"%s: unsupported XA sub-header channel number.",
	function );

	return( -1 );
	}
	#if defined( HAVE_VERBOSE_OUTPUT )
	if( libnotify_verbose != 0 )
	{
	if( ( sector_data[ sector_data_offset + 2 ] & 0x08 ) != 0 )
	{
	libnotify_printf(
	"%s: data flag not set in XA sub-header sub-mode flags.\n",
	function );
	}
	}
	#endif

	/* TODO some writers seem to ignore these flags
	if( ( sector_data[ sector_data_offset + 2 ] & 0x08 ) != 0 )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_INPUT,
	LIBERROR_INPUT_ERROR_VALUE_MISMATCH,
	"%s: unsupported XA sub-header sub-mode flags - data flag not set.",
	function );

	return( -1 );
	}
	*/
	sector_data_offset += 8;
	}
	}
	else if( io_handle->bytes_per_sector == 2352 )
	{
	if( sector_offset == 0 )
	{
	/* TODO what about run-out and lead-out data (have argument indicate non-track data) */
	if( ( io_handle->mode == 1 )
	\|\| ( io_handle->mode == 2 ) )
	{
	read_size = 12;

	if( ( read_size + buffer_offset ) > buffer_size )
	{
	read_size = buffer_size - buffer_offset;
	}
	if( memory_copy(
	&( buffer[ buffer_offset ] ),
	libodraw_sector_synchronisation_data,
	read_size ) != 0 )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_RUNTIME,
	LIBERROR_RUNTIME_ERROR_COPY_FAILED,
	"%s: unsupported copy sector synchronisation data to buffer.",
	function );

	return( -1 );
	}
	buffer_offset += read_size;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	/* TODO set MSF requires current sector */
	buffer[ buffer_offset++ ] = 0;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	buffer[ buffer_offset++ ] = 0;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	buffer[ buffer_offset++ ] = 0;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	if( io_handle->mode == 1 )
	{
	buffer[ buffer_offset++ ] = 1;
	}
	else if ( io_handle->mode == 2 )
	{
	buffer[ buffer_offset++ ] = 2;
	}
	if( buffer_offset >= buffer_size )
	{
	break;
	}
	}
	else
	{
	read_size = 16;

	if( ( read_size + buffer_offset ) > buffer_size )
	{
	read_size = buffer_size - buffer_offset;
	}
	if( memory_set(
	&( buffer[ buffer_offset ] ),
	0,
	read_size ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_SET_FAILED,
	"%s: unable to set sector data in buffer.",
	function );

	return( -1 );
	}
	buffer_offset += read_size;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	}
	if( io_handle->mode == 2 )
	{
	/* TODO what about XA sub-header */
	}
	}
	}
	read_size = io_handle->bytes_per_sector;

	if( sector_offset != 0 )
	{
	sector_data_offset += sector_offset;
	read_size -= (size_t) sector_offset;
	sector_offset = 0;
	}
	if( ( read_size + buffer_offset ) > buffer_size )
	{
	read_size = buffer_size - buffer_offset;
	}
	if( ( track_type == LIBODRAW_TRACK_TYPE_AUDIO )
	&& ( io_handle->bytes_per_sector != 2352 ) )
	{
	/* If the sector size is not 2352 just return 0 bytes
	* for audio data
	*/
	if( memory_set(
	&( buffer[ buffer_offset ] ),
	0,
	read_size ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_COPY_FAILED,
	"%s: unable to set sector data to buffer.",
	function );

	return( -1 );
	}
	}
	else
	{
	if( memory_copy(
	&( buffer[ buffer_offset ] ),
	&( sector_data[ sector_data_offset ] ),
	read_size ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_COPY_FAILED,
	"%s: unable to copy sector data to buffer.",
	function );

	return( -1 );
	}
	}
	buffer_offset += read_size;
	sector_data_offset += read_size;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	if( io_handle->bytes_per_sector == 2048 )
	{
	if( track_type == LIBODRAW_TRACK_TYPE_MODE1_2352 )
	{
	/* TODO calculate checksum, what about read errors ?*/
	sector_data_offset += 4;

	/* TODO check padding */
	sector_data_offset += 8;

	/* TODO check ECC data if necessary, what about read errors ? */
	sector_data_offset += 276;
	}
	else if( ( track_type == LIBODRAW_TRACK_TYPE_MODE2_2336 )
	\|\| ( track_type == LIBODRAW_TRACK_TYPE_MODE2_2352 ) )
	{
	/* TODO calculate checksum, what about read errors ?*/
	sector_data_offset += 4;

	/* TODO check ECC data if necessary, what about read errors ? */
	sector_data_offset += 276;
	}
	else if( bytes_per_sector == 2352 )
	{
	sector_data_offset += 288;
	}
	}
	else if( io_handle->bytes_per_sector == 2352 )
	{
	/* TODO what about run-out and lead-out data (have argument indicate non-track data) */
	if( ( io_handle->mode == 1 )
	\|\| ( io_handle->mode == 2 ) )
	{
	read_size = 4;

	if( ( read_size + buffer_offset ) > buffer_size )
	{
	read_size = buffer_size - buffer_offset;
	}
	/* TODO determine missing data instead of 0 fill */
	if( memory_set(
	&( buffer[ buffer_offset ] ),
	0,
	read_size ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_SET_FAILED,
	"%s: unable to set sector checksum in buffer.",
	function );

	return( -1 );
	}
	buffer_offset += read_size;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	}
	if( io_handle->mode == 1 )
	{
	read_size = 8;

	if( ( read_size + buffer_offset ) > buffer_size )
	{
	read_size = buffer_size - buffer_offset;
	}
	if( memory_set(
	&( buffer[ buffer_offset ] ),
	0,
	read_size ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_SET_FAILED,
	"%s: unable to set sector reserved in buffer.",
	function );

	return( -1 );
	}
	buffer_offset += read_size;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	}
	if( ( io_handle->mode == 1 )
	\|\| ( io_handle->mode == 2 ) )
	{
	read_size = 276;

	if( ( read_size + buffer_offset ) > buffer_size )
	{
	read_size = buffer_size - buffer_offset;
	}
	/* TODO determine missing data instead of 0 fill */
	if( memory_set(
	&( buffer[ buffer_offset ] ),
	0,
	read_size ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_SET_FAILED,
	"%s: unable to set sector error correction data in buffer.",
	function );

	return( -1 );
	}
	buffer_offset += read_size;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	}
	else
	{
	read_size = 288;

	if( ( read_size + buffer_offset ) > buffer_size )
	{
	read_size = buffer_size - buffer_offset;
	}
	if( memory_set(
	&( buffer[ buffer_offset ] ),
	0,
	read_size ) == NULL )
	{
	liberror_error_set(
	error,
	LIBERROR_ERROR_DOMAIN_MEMORY,
	LIBERROR_MEMORY_ERROR_SET_FAILED,
	"%s: unable to set sector data in buffer.",
	function );

	return( -1 );
	}
	buffer_offset += read_size;

	if( buffer_offset >= buffer_size )
	{
	break;
	}
	}
	}
	sector_index++;
	}
	return( (ssize_t) buffer_offset );
	}

File Metadata

Mime Type: text/x-c
Expires: Fri, Nov 21, 4:59 AM (1 d, 12 h)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 1360925
Default Alt Text: libodraw_io_handle.c (16 KB)

libodraw_io_handle.cNo OneTemporaryActions

libodraw_io_handle.cView Options

File Metadata

Event Timeline

libodraw_io_handle.c
No OneTemporary
Actions

libodraw_io_handle.c
View Options