/***************************************************************************** * device.h: DVD device access ***************************************************************************** * Copyright (C) 1998-2006 VideoLAN * $Id$ * * Authors: Stéphane Borel * Sam Hocevar * Håkan Hjort * * 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 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #include "config.h" #include #include #include #ifdef HAVE_ERRNO_H # include #endif #include #include #ifdef HAVE_SYS_PARAM_H # include #endif #include #ifdef HAVE_UNISTD_H # include #endif #ifdef HAVE_LIMITS_H # include #endif #if defined( WIN32 ) && !defined( SYS_CYGWIN ) # include /* read() */ #else # include /* struct iovec */ #endif #ifdef DARWIN_DVD_IOCTL # include # include # include # include # include # include # include #endif #include "dvdcss/dvdcss.h" #include "common.h" #include "css.h" #include "libdvdcss.h" #include "ioctl.h" #include "device.h" /***************************************************************************** * Device reading prototypes *****************************************************************************/ static int libc_open ( dvdcss_t, char const * ); static int libc_seek ( dvdcss_t, int ); static int libc_read ( dvdcss_t, void *, int ); static int libc_readv ( dvdcss_t, struct iovec *, int ); #ifdef WIN32 static int win2k_open ( dvdcss_t, char const * ); static int aspi_open ( dvdcss_t, char const * ); static int win2k_seek ( dvdcss_t, int ); static int aspi_seek ( dvdcss_t, int ); static int win2k_read ( dvdcss_t, void *, int ); static int aspi_read ( dvdcss_t, void *, int ); static int win_readv ( dvdcss_t, struct iovec *, int ); static int aspi_read_internal ( int, void *, int ); #endif int _dvdcss_use_ioctls( dvdcss_t dvdcss ) { #if defined( WIN32 ) if( dvdcss->b_file ) { return 0; } /* FIXME: implement this for Windows */ if( WIN2K ) { return 1; } else { return 1; } #else struct stat fileinfo; int ret; ret = fstat( dvdcss->i_fd, &fileinfo ); if( ret < 0 ) { return 1; /* What to do? Be conservative and try to use the ioctls */ } /* Complete this list and check that we test for the right things * (I've assumed for all OSs that 'r', (raw) device, are char devices * and those that don't contain/use an 'r' in the name are block devices) * * Linux needs a block device * Solaris needs a char device * Darwin needs a char device * OpenBSD needs a char device * NetBSD needs a char device * FreeBSD can use either the block or the char device * BSD/OS can use either the block or the char device */ /* Check if this is a block/char device */ if( S_ISBLK( fileinfo.st_mode ) || S_ISCHR( fileinfo.st_mode ) ) { return 1; } else { return 0; } #endif } void _dvdcss_check ( dvdcss_t dvdcss ) { #if defined( WIN32 ) DWORD drives; int i; #elif defined( DARWIN_DVD_IOCTL ) io_object_t next_media; mach_port_t master_port; kern_return_t kern_result; io_iterator_t media_iterator; CFMutableDictionaryRef classes_to_match; #else char *ppsz_devices[] = { "/dev/dvd", "/dev/cdrom", "/dev/hdc", NULL }; int i, i_fd; #endif /* If the device name is non-null, return */ if( dvdcss->psz_device[0] ) { return; } #if defined( WIN32 ) drives = GetLogicalDrives(); for( i = 0; drives; i++ ) { char psz_device[5]; DWORD cur = 1 << i; UINT i_ret; if( (drives & cur) == 0 ) { continue; } drives &= ~cur; sprintf( psz_device, "%c:\\", 'A' + i ); i_ret = GetDriveType( psz_device ); if( i_ret != DRIVE_CDROM ) { continue; } /* Remove trailing backslash */ psz_device[2] = '\0'; /* FIXME: we want to differenciate between CD and DVD drives * using DeviceIoControl() */ print_debug( dvdcss, "defaulting to drive `%s'", psz_device ); free( dvdcss->psz_device ); dvdcss->psz_device = strdup( psz_device ); return; } #elif defined( DARWIN_DVD_IOCTL ) kern_result = IOMasterPort( MACH_PORT_NULL, &master_port ); if( kern_result != KERN_SUCCESS ) { return; } classes_to_match = IOServiceMatching( kIODVDMediaClass ); if( classes_to_match == NULL ) { return; } CFDictionarySetValue( classes_to_match, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); kern_result = IOServiceGetMatchingServices( master_port, classes_to_match, &media_iterator ); if( kern_result != KERN_SUCCESS ) { return; } next_media = IOIteratorNext( media_iterator ); for( ; ; ) { char psz_buf[0x32]; size_t i_pathlen; CFTypeRef psz_path; next_media = IOIteratorNext( media_iterator ); if( next_media == 0 ) { break; } psz_path = IORegistryEntryCreateCFProperty( next_media, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); if( psz_path == NULL ) { IOObjectRelease( next_media ); continue; } snprintf( psz_buf, sizeof(psz_buf), "%s%c", _PATH_DEV, 'r' ); i_pathlen = strlen( psz_buf ); if( CFStringGetCString( psz_path, (char*)&psz_buf + i_pathlen, sizeof(psz_buf) - i_pathlen, kCFStringEncodingASCII ) ) { print_debug( dvdcss, "defaulting to drive `%s'", psz_buf ); CFRelease( psz_path ); IOObjectRelease( next_media ); IOObjectRelease( media_iterator ); free( dvdcss->psz_device ); dvdcss->psz_device = strdup( psz_buf ); return; } CFRelease( psz_path ); IOObjectRelease( next_media ); } IOObjectRelease( media_iterator ); #else for( i = 0; ppsz_devices[i]; i++ ) { i_fd = open( ppsz_devices[i], 0 ); if( i_fd != -1 ) { print_debug( dvdcss, "defaulting to drive `%s'", ppsz_devices[i] ); close( i_fd ); free( dvdcss->psz_device ); dvdcss->psz_device = strdup( ppsz_devices[i] ); return; } } #endif print_error( dvdcss, "could not find a suitable default drive" ); } int _dvdcss_open ( dvdcss_t dvdcss ) { char const *psz_device = dvdcss->psz_device; print_debug( dvdcss, "opening target `%s'", psz_device ); #if defined( WIN32 ) dvdcss->b_file = 1; /* If device is "X:" or "X:\", we are not actually opening a file. */ if (psz_device[0] && psz_device[1] == ':' && (!psz_device[2] || (psz_device[2] == '\\' && !psz_device[3]))) dvdcss->b_file = 0; /* Initialize readv temporary buffer */ dvdcss->p_readv_buffer = NULL; dvdcss->i_readv_buf_size = 0; if( !dvdcss->b_file && WIN2K ) { print_debug( dvdcss, "using Win2K API for access" ); dvdcss->pf_seek = win2k_seek; dvdcss->pf_read = win2k_read; dvdcss->pf_readv = win_readv; return win2k_open( dvdcss, psz_device ); } else if( !dvdcss->b_file ) { print_debug( dvdcss, "using ASPI for access" ); dvdcss->pf_seek = aspi_seek; dvdcss->pf_read = aspi_read; dvdcss->pf_readv = win_readv; return aspi_open( dvdcss, psz_device ); } else #endif { print_debug( dvdcss, "using libc for access" ); dvdcss->pf_seek = libc_seek; dvdcss->pf_read = libc_read; dvdcss->pf_readv = libc_readv; return libc_open( dvdcss, psz_device ); } } #ifndef WIN32 int _dvdcss_raw_open ( dvdcss_t dvdcss, char const *psz_device ) { dvdcss->i_raw_fd = open( psz_device, 0 ); if( dvdcss->i_raw_fd == -1 ) { print_debug( dvdcss, "cannot open %s (%s)", psz_device, strerror(errno) ); print_error( dvdcss, "failed to open raw device, but continuing" ); return -1; } else { dvdcss->i_read_fd = dvdcss->i_raw_fd; } return 0; } #endif int _dvdcss_close ( dvdcss_t dvdcss ) { #if defined( WIN32 ) if( dvdcss->b_file ) { close( dvdcss->i_fd ); } else if( WIN2K ) { CloseHandle( (HANDLE) dvdcss->i_fd ); } else /* ASPI */ { struct w32_aspidev *fd = (struct w32_aspidev *) dvdcss->i_fd; /* Unload aspi and free w32_aspidev structure */ FreeLibrary( (HMODULE) fd->hASPI ); free( (void*) dvdcss->i_fd ); } /* Free readv temporary buffer */ if( dvdcss->p_readv_buffer ) { free( dvdcss->p_readv_buffer ); dvdcss->p_readv_buffer = NULL; dvdcss->i_readv_buf_size = 0; } return 0; #else close( dvdcss->i_fd ); if( dvdcss->i_raw_fd >= 0 ) { close( dvdcss->i_raw_fd ); dvdcss->i_raw_fd = -1; } return 0; #endif } /* Following functions are local */ /***************************************************************************** * Open commands. *****************************************************************************/ static int libc_open ( dvdcss_t dvdcss, char const *psz_device ) { #if !defined( WIN32 ) dvdcss->i_fd = dvdcss->i_read_fd = open( psz_device, 0 ); #else dvdcss->i_fd = dvdcss->i_read_fd = open( psz_device, O_BINARY ); #endif if( dvdcss->i_fd == -1 ) { print_debug( dvdcss, "cannot open %s (%s)", psz_device, strerror(errno) ); print_error( dvdcss, "failed to open device" ); return -1; } dvdcss->i_pos = 0; return 0; } #if defined( WIN32 ) static int win2k_open ( dvdcss_t dvdcss, char const *psz_device ) { char psz_dvd[7]; _snprintf( psz_dvd, 7, "\\\\.\\%c:", psz_device[0] ); /* To work around an M$ bug in IOCTL_DVD_READ_STRUCTURE, we need read * _and_ write access to the device (so we can make SCSI Pass Through * Requests). Unfortunately this is only allowed if you have * administrator priviledges so we allow for a fallback method with * only read access to the device (in this case ioctl_ReadCopyright() * won't send back the right result). * (See Microsoft Q241374: Read and Write Access Required for SCSI * Pass Through Requests) */ dvdcss->i_fd = (int) CreateFile( psz_dvd, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL ); if( (HANDLE) dvdcss->i_fd == INVALID_HANDLE_VALUE ) dvdcss->i_fd = (int) CreateFile( psz_dvd, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL ); if( (HANDLE) dvdcss->i_fd == INVALID_HANDLE_VALUE ) { print_error( dvdcss, "failed opening device" ); return -1; } dvdcss->i_pos = 0; return 0; } static int aspi_open( dvdcss_t dvdcss, char const * psz_device ) { HMODULE hASPI; DWORD dwSupportInfo; struct w32_aspidev *fd; int i, j, i_hostadapters; GETASPI32SUPPORTINFO lpGetSupport; SENDASPI32COMMAND lpSendCommand; char c_drive = psz_device[0]; /* load aspi and init w32_aspidev structure */ hASPI = LoadLibrary( "wnaspi32.dll" ); if( hASPI == NULL ) { print_error( dvdcss, "unable to load wnaspi32.dll" ); return -1; } lpGetSupport = (GETASPI32SUPPORTINFO) GetProcAddress( hASPI, "GetASPI32SupportInfo" ); lpSendCommand = (SENDASPI32COMMAND) GetProcAddress( hASPI, "SendASPI32Command" ); if(lpGetSupport == NULL || lpSendCommand == NULL ) { print_error( dvdcss, "unable to get aspi function pointers" ); FreeLibrary( hASPI ); return -1; } dwSupportInfo = lpGetSupport(); if( HIBYTE( LOWORD ( dwSupportInfo ) ) == SS_NO_ADAPTERS ) { print_error( dvdcss, "no ASPI adapters found" ); FreeLibrary( hASPI ); return -1; } if( HIBYTE( LOWORD ( dwSupportInfo ) ) != SS_COMP ) { print_error( dvdcss, "unable to initalize aspi layer" ); FreeLibrary( hASPI ); return -1; } i_hostadapters = LOBYTE( LOWORD( dwSupportInfo ) ); if( i_hostadapters == 0 ) { print_error( dvdcss, "no ASPI adapters ready" ); FreeLibrary( hASPI ); return -1; } fd = malloc( sizeof( struct w32_aspidev ) ); if( fd == NULL ) { print_error( dvdcss, "not enough memory" ); FreeLibrary( hASPI ); return -1; } fd->i_blocks = 0; fd->hASPI = (long) hASPI; fd->lpSendCommand = lpSendCommand; c_drive = c_drive > 'Z' ? c_drive - 'a' : c_drive - 'A'; for( i = 0; i < i_hostadapters; i++ ) { for( j = 0; j < 15; j++ ) { struct SRB_GetDiskInfo srbDiskInfo; srbDiskInfo.SRB_Cmd = SC_GET_DISK_INFO; srbDiskInfo.SRB_HaId = i; srbDiskInfo.SRB_Flags = 0; srbDiskInfo.SRB_Hdr_Rsvd = 0; srbDiskInfo.SRB_Target = j; srbDiskInfo.SRB_Lun = 0; lpSendCommand( (void*) &srbDiskInfo ); if( (srbDiskInfo.SRB_Status == SS_COMP) && (srbDiskInfo.SRB_Int13HDriveInfo == c_drive) ) { /* Make sure this is a cdrom device */ struct SRB_GDEVBlock srbGDEVBlock; memset( &srbGDEVBlock, 0, sizeof(struct SRB_GDEVBlock) ); srbGDEVBlock.SRB_Cmd = SC_GET_DEV_TYPE; srbGDEVBlock.SRB_HaId = i; srbGDEVBlock.SRB_Target = j; lpSendCommand( (void*) &srbGDEVBlock ); if( ( srbGDEVBlock.SRB_Status == SS_COMP ) && ( srbGDEVBlock.SRB_DeviceType == DTYPE_CDROM ) ) { fd->i_sid = MAKEWORD( i, j ); dvdcss->i_fd = (int) fd; dvdcss->i_pos = 0; return 0; } else { free( (void*) fd ); FreeLibrary( hASPI ); print_error( dvdcss,"this is not a cdrom drive" ); return -1; } } } } free( (void*) fd ); FreeLibrary( hASPI ); print_error( dvdcss, "unable to get haid and target (aspi)" ); return -1; } #endif /***************************************************************************** * Seek commands. *****************************************************************************/ static int libc_seek( dvdcss_t dvdcss, int i_blocks ) { off_t i_seek; if( dvdcss->i_pos == i_blocks ) { /* We are already in position */ return i_blocks; } i_seek = (off_t)i_blocks * (off_t)DVDCSS_BLOCK_SIZE; i_seek = lseek( dvdcss->i_read_fd, i_seek, SEEK_SET ); if( i_seek < 0 ) { print_error( dvdcss, "seek error" ); dvdcss->i_pos = -1; return i_seek; } dvdcss->i_pos = i_seek / DVDCSS_BLOCK_SIZE; return dvdcss->i_pos; } #if defined( WIN32 ) static int win2k_seek( dvdcss_t dvdcss, int i_blocks ) { LARGE_INTEGER li_seek; #ifndef INVALID_SET_FILE_POINTER # define INVALID_SET_FILE_POINTER ((DWORD)-1) #endif if( dvdcss->i_pos == i_blocks ) { /* We are already in position */ return i_blocks; } li_seek.QuadPart = (LONGLONG)i_blocks * DVDCSS_BLOCK_SIZE; li_seek.LowPart = SetFilePointer( (HANDLE) dvdcss->i_fd, li_seek.LowPart, &li_seek.HighPart, FILE_BEGIN ); if( (li_seek.LowPart == INVALID_SET_FILE_POINTER) && GetLastError() != NO_ERROR) { dvdcss->i_pos = -1; return -1; } dvdcss->i_pos = li_seek.QuadPart / DVDCSS_BLOCK_SIZE; return dvdcss->i_pos; } static int aspi_seek( dvdcss_t dvdcss, int i_blocks ) { int i_old_blocks; char sz_buf[ DVDCSS_BLOCK_SIZE ]; struct w32_aspidev *fd = (struct w32_aspidev *) dvdcss->i_fd; if( dvdcss->i_pos == i_blocks ) { /* We are already in position */ return i_blocks; } i_old_blocks = fd->i_blocks; fd->i_blocks = i_blocks; if( aspi_read_internal( dvdcss->i_fd, sz_buf, 1 ) == -1 ) { fd->i_blocks = i_old_blocks; dvdcss->i_pos = -1; return -1; } (fd->i_blocks)--; dvdcss->i_pos = fd->i_blocks; return dvdcss->i_pos; } #endif /***************************************************************************** * Read commands. *****************************************************************************/ static int libc_read ( dvdcss_t dvdcss, void *p_buffer, int i_blocks ) { off_t i_size, i_ret; i_size = (off_t)i_blocks * (off_t)DVDCSS_BLOCK_SIZE; i_ret = read( dvdcss->i_read_fd, p_buffer, i_size ); if( i_ret < 0 ) { print_error( dvdcss, "read error" ); dvdcss->i_pos = -1; return i_ret; } /* Handle partial reads */ if( i_ret != i_size ) { int i_seek; dvdcss->i_pos = -1; i_seek = libc_seek( dvdcss, i_ret / DVDCSS_BLOCK_SIZE ); if( i_seek < 0 ) { return i_seek; } /* We have to return now so that i_pos isn't clobbered */ return i_ret / DVDCSS_BLOCK_SIZE; } dvdcss->i_pos += i_ret / DVDCSS_BLOCK_SIZE; return i_ret / DVDCSS_BLOCK_SIZE; } #if defined( WIN32 ) static int win2k_read ( dvdcss_t dvdcss, void *p_buffer, int i_blocks ) { int i_bytes; if( !ReadFile( (HANDLE) dvdcss->i_fd, p_buffer, i_blocks * DVDCSS_BLOCK_SIZE, (LPDWORD)&i_bytes, NULL ) ) { dvdcss->i_pos = -1; return -1; } dvdcss->i_pos += i_bytes / DVDCSS_BLOCK_SIZE; return i_bytes / DVDCSS_BLOCK_SIZE; } static int aspi_read ( dvdcss_t dvdcss, void *p_buffer, int i_blocks ) { int i_read = aspi_read_internal( dvdcss->i_fd, p_buffer, i_blocks ); if( i_read < 0 ) { dvdcss->i_pos = -1; return i_read; } dvdcss->i_pos += i_read; return i_read; } #endif /***************************************************************************** * Readv commands. *****************************************************************************/ static int libc_readv ( dvdcss_t dvdcss, struct iovec *p_iovec, int i_blocks ) { #if defined( WIN32 ) int i_index, i_len, i_total = 0; unsigned char *p_base; int i_bytes; for( i_index = i_blocks; i_index; i_index--, p_iovec++ ) { i_len = p_iovec->iov_len; p_base = p_iovec->iov_base; if( i_len <= 0 ) { continue; } i_bytes = read( dvdcss->i_fd, p_base, i_len ); if( i_bytes < 0 ) { /* One of the reads failed, too bad. * We won't even bother returning the reads that went ok, * and as in the posix spec the file postition is left * unspecified after a failure */ dvdcss->i_pos = -1; return -1; } i_total += i_bytes; if( i_bytes != i_len ) { /* We reached the end of the file or a signal interrupted * the read. Return a partial read. */ int i_seek; dvdcss->i_pos = -1; i_seek = libc_seek( dvdcss, i_total / DVDCSS_BLOCK_SIZE ); if( i_seek < 0 ) { return i_seek; } /* We have to return now so that i_pos isn't clobbered */ return i_total / DVDCSS_BLOCK_SIZE; } } dvdcss->i_pos += i_total / DVDCSS_BLOCK_SIZE; return i_total / DVDCSS_BLOCK_SIZE; #else int i_read = readv( dvdcss->i_read_fd, p_iovec, i_blocks ); if( i_read < 0 ) { dvdcss->i_pos = -1; return i_read; } dvdcss->i_pos += i_read / DVDCSS_BLOCK_SIZE; return i_read / DVDCSS_BLOCK_SIZE; #endif } #if defined( WIN32 ) /***************************************************************************** * win_readv: vectored read using ReadFile for Win2K and ASPI for win9x *****************************************************************************/ static int win_readv ( dvdcss_t dvdcss, struct iovec *p_iovec, int i_blocks ) { int i_index; int i_blocks_read, i_blocks_total = 0; /* Check the size of the readv temp buffer, just in case we need to * realloc something bigger */ if( dvdcss->i_readv_buf_size < i_blocks * DVDCSS_BLOCK_SIZE ) { dvdcss->i_readv_buf_size = i_blocks * DVDCSS_BLOCK_SIZE; if( dvdcss->p_readv_buffer ) free( dvdcss->p_readv_buffer ); /* Allocate a buffer which will be used as a temporary storage * for readv */ dvdcss->p_readv_buffer = malloc( dvdcss->i_readv_buf_size ); if( !dvdcss->p_readv_buffer ) { print_error( dvdcss, " failed (readv)" ); dvdcss->i_pos = -1; return -1; } } for( i_index = i_blocks; i_index; i_index-- ) { i_blocks_total += p_iovec[i_index-1].iov_len; } if( i_blocks_total <= 0 ) return 0; i_blocks_total /= DVDCSS_BLOCK_SIZE; if( WIN2K ) { unsigned long int i_bytes; if( !ReadFile( (HANDLE)dvdcss->i_fd, dvdcss->p_readv_buffer, i_blocks_total * DVDCSS_BLOCK_SIZE, &i_bytes, NULL ) ) { /* The read failed... too bad. * As in the posix spec the file postition is left * unspecified after a failure */ dvdcss->i_pos = -1; return -1; } i_blocks_read = i_bytes / DVDCSS_BLOCK_SIZE; } else /* Win9x */ { i_blocks_read = aspi_read_internal( dvdcss->i_fd, dvdcss->p_readv_buffer, i_blocks_total ); if( i_blocks_read < 0 ) { /* See above */ dvdcss->i_pos = -1; return -1; } } /* We just have to copy the content of the temp buffer into the iovecs */ for( i_index = 0, i_blocks_total = i_blocks_read; i_blocks_total > 0; i_index++ ) { memcpy( p_iovec[i_index].iov_base, dvdcss->p_readv_buffer + (i_blocks_read - i_blocks_total) * DVDCSS_BLOCK_SIZE, p_iovec[i_index].iov_len ); /* if we read less blocks than asked, we'll just end up copying * garbage, this isn't an issue as we return the number of * blocks actually read */ i_blocks_total -= ( p_iovec[i_index].iov_len / DVDCSS_BLOCK_SIZE ); } dvdcss->i_pos += i_blocks_read; return i_blocks_read; } static int aspi_read_internal( int i_fd, void *p_data, int i_blocks ) { HANDLE hEvent; struct SRB_ExecSCSICmd ssc; struct w32_aspidev *fd = (struct w32_aspidev *) i_fd; /* Create the transfer completion event */ hEvent = CreateEvent( NULL, TRUE, FALSE, NULL ); if( hEvent == NULL ) { return -1; } memset( &ssc, 0, sizeof( ssc ) ); ssc.SRB_Cmd = SC_EXEC_SCSI_CMD; ssc.SRB_Flags = SRB_DIR_IN | SRB_EVENT_NOTIFY; ssc.SRB_HaId = LOBYTE( fd->i_sid ); ssc.SRB_Target = HIBYTE( fd->i_sid ); ssc.SRB_SenseLen = SENSE_LEN; ssc.SRB_PostProc = (LPVOID) hEvent; ssc.SRB_BufPointer = p_data; ssc.SRB_CDBLen = 12; ssc.CDBByte[0] = 0xA8; /* RAW */ ssc.CDBByte[2] = (UCHAR) (fd->i_blocks >> 24); ssc.CDBByte[3] = (UCHAR) (fd->i_blocks >> 16) & 0xff; ssc.CDBByte[4] = (UCHAR) (fd->i_blocks >> 8) & 0xff; ssc.CDBByte[5] = (UCHAR) (fd->i_blocks) & 0xff; /* We have to break down the reads into 64kb pieces (ASPI restriction) */ if( i_blocks > 32 ) { ssc.SRB_BufLen = 32 * DVDCSS_BLOCK_SIZE; ssc.CDBByte[9] = 32; fd->i_blocks += 32; /* Initiate transfer */ ResetEvent( hEvent ); fd->lpSendCommand( (void*) &ssc ); /* transfer the next 64kb (aspi_read_internal is called recursively) * We need to check the status of the read on return */ if( aspi_read_internal( i_fd, (uint8_t*) p_data + 32 * DVDCSS_BLOCK_SIZE, i_blocks - 32) < 0 ) { return -1; } } else { /* This is the last transfer */ ssc.SRB_BufLen = i_blocks * DVDCSS_BLOCK_SIZE; ssc.CDBByte[9] = (UCHAR) i_blocks; fd->i_blocks += i_blocks; /* Initiate transfer */ ResetEvent( hEvent ); fd->lpSendCommand( (void*) &ssc ); } /* If the command has still not been processed, wait until it's finished */ if( ssc.SRB_Status == SS_PENDING ) { WaitForSingleObject( hEvent, INFINITE ); } CloseHandle( hEvent ); /* check that the transfer went as planned */ if( ssc.SRB_Status != SS_COMP ) { return -1; } return i_blocks; } #endif