diff options
Diffstat (limited to 'libdvdcss/device.c')
| -rw-r--r-- | libdvdcss/device.c | 1090 |
1 files changed, 0 insertions, 1090 deletions
diff --git a/libdvdcss/device.c b/libdvdcss/device.c deleted file mode 100644 index 98507f4ea5..0000000000 --- a/libdvdcss/device.c +++ /dev/null @@ -1,1090 +0,0 @@ -/***************************************************************************** - * device.h: DVD device access - ***************************************************************************** - * Copyright (C) 1998-2006 VideoLAN - * $Id$ - * - * Authors: Stéphane Borel <stef@via.ecp.fr> - * Sam Hocevar <sam@zoy.org> - * Håkan Hjort <d95hjort@dtek.chalmers.se> - * - * This library 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 library 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 library; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - *****************************************************************************/ - -/***************************************************************************** - * Preamble - *****************************************************************************/ -#include "config.h" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#ifdef HAVE_ERRNO_H -# include <errno.h> -#endif -#include <sys/types.h> -#include <sys/stat.h> -#ifdef HAVE_SYS_PARAM_H -# include <sys/param.h> -#endif -#include <fcntl.h> - -#ifdef HAVE_UNISTD_H -# include <unistd.h> -#endif - -#ifdef HAVE_LIMITS_H -# include <limits.h> -#endif - -#if defined( WIN32 ) && !defined( SYS_CYGWIN ) -# include <io.h> /* read() */ -#else -# include <sys/uio.h> /* struct iovec */ -#endif - -#ifdef DARWIN_DVD_IOCTL -# include <paths.h> -# include <CoreFoundation/CoreFoundation.h> -# include <IOKit/IOKitLib.h> -# include <IOKit/IOBSD.h> -# include <IOKit/storage/IOMedia.h> -# include <IOKit/storage/IOCDMedia.h> -# include <IOKit/storage/IODVDMedia.h> -#endif - -#ifdef SYS_OS2 -# define INCL_DOS -# define INCL_DOSDEVIOCTL -# include <os2.h> -# include <io.h> /* setmode() */ -# include <fcntl.h> /* O_BINARY */ -#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 ); -#elif defined( SYS_OS2 ) -static int os2_open ( dvdcss_t, char const * ); -/* just use macros for libc */ -# define os2_seek libc_seek -# define os2_read libc_read -# define os2_readv libc_readv -#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; - } -#elif defined( SYS_OS2 ) - ULONG ulMode; - - if( DosQueryFHState( dvdcss->i_fd, &ulMode ) != 0 ) - return 1; /* What to do? Be conservative and try to use the ioctls */ - - if( ulMode & OPEN_FLAGS_DASD ) - return 1; - - return 0; -#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; -#elif defined( SYS_OS2 ) -#pragma pack( 1 ) - struct - { - BYTE bCmdInfo; - BYTE bDrive; - } param; - - struct - { - BYTE abEBPB[31]; - USHORT usCylinders; - BYTE bDevType; - USHORT usDevAttr; - } data; -#pragma pack() - - ULONG ulParamLen; - ULONG ulDataLen; - ULONG rc; - - int i; -#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 ); -#elif defined( SYS_OS2 ) - for( i = 0; i < 26; i++ ) - { - param.bCmdInfo = 0; - param.bDrive = i; - - rc = DosDevIOCtl( ( HFILE )-1, IOCTL_DISK, DSK_GETDEVICEPARAMS, - ¶m, sizeof( param ), &ulParamLen, - &data, sizeof( data ), &ulDataLen ); - - if( rc == 0 ) - { - /* Check for removable and for cylinders */ - if( ( data.usDevAttr & 1 ) == 0 && data.usCylinders == 0xFFFF ) - { - char psz_dvd[] = "A:"; - - psz_dvd[0] += i; - - print_debug( dvdcss, "defaulting to drive `%s'", psz_dvd ); - free( dvdcss->psz_device ); - dvdcss->psz_device = strdup( psz_dvd ); - return; - } - } - } -#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 -#elif defined( SYS_OS2 ) - /* 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] ) ) ) - { - print_debug( dvdcss, "using OS2 API for access" ); - dvdcss->pf_seek = os2_seek; - dvdcss->pf_read = os2_read; - dvdcss->pf_readv = os2_readv; - return os2_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 ); - } -} - -#if !defined(WIN32) && !defined(SYS_OS2) -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 ); - -#ifndef SYS_OS2 - if( dvdcss->i_raw_fd >= 0 ) - { - close( dvdcss->i_raw_fd ); - dvdcss->i_raw_fd = -1; - } -#endif - - return 0; -#endif -} - -/* Following functions are local */ - -/***************************************************************************** - * Open commands. - *****************************************************************************/ -static int libc_open ( dvdcss_t dvdcss, char const *psz_device ) -{ -#if !defined( WIN32 ) && !defined( SYS_OS2 ) - 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 - -#ifdef SYS_OS2 -static int os2_open ( dvdcss_t dvdcss, char const *psz_device ) -{ - char psz_dvd[] = "X:"; - HFILE hfile; - ULONG ulAction; - ULONG rc; - - psz_dvd[0] = psz_device[0]; - - rc = DosOpenL( ( PSZ )psz_dvd, &hfile, &ulAction, 0, FILE_NORMAL, - OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW, - OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE | OPEN_FLAGS_DASD, - NULL ); - - if( rc ) - { - print_error( dvdcss, "failed to open device" ); - return -1; - } - - setmode( hfile, O_BINARY ); - - dvdcss->i_fd = dvdcss->i_read_fd = hfile; - - dvdcss->i_pos = 0; - - return 0; -} -#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 - |