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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006-2007 Dave Chapman
*
* error(), lock_volume() and unlock_volume() functions and inspiration taken
* from:
* RawDisk - Direct Disk Read/Write Access for NT/2000/XP
* Copyright (c) 2003 Jan Kiszka
* http://www.stud.uni-hannover.de/user/73174/RawDisk/
*
* 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 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <windows.h>
#include <stddef.h>
#include <winioctl.h>
#include "ipodio.h"
static int lock_volume(HANDLE hDisk)
{
DWORD dummy;
return DeviceIoControl(hDisk, FSCTL_LOCK_VOLUME, NULL, 0, NULL, 0,
&dummy, NULL);
}
static int unlock_volume(HANDLE hDisk)
{
DWORD dummy;
return DeviceIoControl(hDisk, FSCTL_UNLOCK_VOLUME, NULL, 0, NULL, 0,
&dummy, NULL);
}
void ipod_print_error(char* msg)
{
LPSTR pMsgBuf = NULL;
printf(msg);
FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), pMsgBuf,
0, NULL);
printf(pMsgBuf);
LocalFree(pMsgBuf);
}
int ipod_open(struct ipod_t* ipod, int silent)
{
DISK_GEOMETRY_EX diskgeometry_ex;
DISK_GEOMETRY diskgeometry;
unsigned long n;
ipod->dh = CreateFileA(ipod->diskname, GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_FLAG_WRITE_THROUGH | FILE_FLAG_NO_BUFFERING, NULL);
if (ipod->dh == INVALID_HANDLE_VALUE) {
if (!silent) ipod_print_error(" Error opening disk: ");
if(GetLastError() == ERROR_ACCESS_DENIED)
return -2;
else
return -1;
}
if (!lock_volume(ipod->dh)) {
if (!silent) ipod_print_error(" Error locking disk: ");
return -1;
}
/* Defaults */
ipod->num_heads = 0;
ipod->sectors_per_track = 0;
if (!DeviceIoControl(ipod->dh,
IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
NULL,
0,
&diskgeometry_ex,
sizeof(diskgeometry_ex),
&n,
NULL)) {
if (!DeviceIoControl(ipod->dh,
IOCTL_DISK_GET_DRIVE_GEOMETRY,
NULL,
0,
&diskgeometry,
sizeof(diskgeometry),
&n,
NULL)) {
if (!silent) ipod_print_error(" Error reading disk geometry: ");
return -1;
} else {
ipod->sector_size = diskgeometry.BytesPerSector;
ipod->num_heads = diskgeometry.TracksPerCylinder;
ipod->sectors_per_track = diskgeometry.SectorsPerTrack;
}
} else {
ipod->sector_size = diskgeometry_ex.Geometry.BytesPerSector;
ipod->num_heads = diskgeometry_ex.Geometry.TracksPerCylinder;
ipod->sectors_per_track = diskgeometry_ex.Geometry.SectorsPerTrack;
}
return 0;
}
int ipod_reopen_rw(struct ipod_t* ipod)
{
/* Close existing file and re-open for writing */
unlock_volume(ipod->dh);
CloseHandle(ipod->dh);
ipod->dh = CreateFileA(ipod->diskname, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_FLAG_WRITE_THROUGH | FILE_FLAG_NO_BUFFERING, NULL);
if (ipod->dh == INVALID_HANDLE_VALUE) {
ipod_print_error(" Error opening disk: ");
return -1;
}
if (!lock_volume(ipod->dh)) {
ipod_print_error(" Error locking disk: ");
return -1;
}
return 0;
}
int ipod_close(struct ipod_t* ipod)
{
unlock_volume(ipod->dh);
CloseHandle(ipod->dh);
return 0;
}
int ipod_alloc_buffer(unsigned char** sectorbuf, int bufsize)
{
/* The ReadFile function requires a memory buffer aligned to a multiple of
the disk sector size. */
*sectorbuf = (unsigned char*)VirtualAlloc(NULL, bufsize, MEM_COMMIT, PAGE_READWRITE);
if (*sectorbuf == NULL) {
ipod_print_error(" Error allocating a buffer: ");
return -1;
}
return 0;
}
int ipod_seek(struct ipod_t* ipod, unsigned long pos)
{
if (SetFilePointer(ipod->dh, pos, NULL, FILE_BEGIN)==0xffffffff) {
ipod_print_error(" Seek error ");
return -1;
}
return 0;
}
ssize_t ipod_read(struct ipod_t* ipod, unsigned char* buf, int nbytes)
{
unsigned long count;
if (!ReadFile(ipod->dh, buf, nbytes, &count, NULL)) {
ipod_print_error(" Error reading from disk: ");
return -1;
}
return count;
}
ssize_t ipod_write(struct ipod_t* ipod, unsigned char* buf, int nbytes)
{
unsigned long count;
if (!WriteFile(ipod->dh, buf, nbytes, &count, NULL)) {
ipod_print_error(" Error writing to disk: ");
return -1;
}
return count;
}
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