[068325]: src / device.c Maximize Restore History

Download this file

device.c    974 lines (822 with data), 27.2 kB

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
/*****************************************************************************
* 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 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 <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
#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