iso.h File Reference

#include <pshpack1.h>
#include <poppack.h>

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Classes
struct	_DIR_RECORD
struct	_VD_HEADER
struct	_PVD
struct	_ISO_FILE_INFO

Typedefs
typedef struct _DIR_RECORD	DIR_RECORD
typedef struct _DIR_RECORD *	PDIR_RECORD
typedef struct _VD_HEADER	VD_HEADER
typedef struct _VD_HEADER *	PVD_HEADER
typedef struct _PVD	PVD
typedef struct _PVD *	PPVD
typedef struct _ISO_FILE_INFO	ISO_FILE_INFO
typedef struct _ISO_FILE_INFO *	PISO_FILE_INFO

Functions
const DEVVTBL *	IsoMount (ULONG DeviceId)

Typedef Documentation

DIR_RECORD

typedef struct _DIR_RECORD DIR_RECORD

ISO_FILE_INFO

typedef struct _ISO_FILE_INFO ISO_FILE_INFO

PDIR_RECORD

typedef struct _DIR_RECORD * PDIR_RECORD

PISO_FILE_INFO

typedef struct _ISO_FILE_INFO * PISO_FILE_INFO

PPVD

typedef struct _PVD * PPVD

PVD

typedef struct _PVD PVD

PVD_HEADER

typedef struct _VD_HEADER * PVD_HEADER

VD_HEADER

typedef struct _VD_HEADER VD_HEADER

Function Documentation

IsoMount()

const DEVVTBL * IsoMount

(

ULONG

DeviceId

)

Definition at line 560 of file iso.c.

{
    UCHAR Buffer[SECTORSIZE];
    PPVD Pvd = (PPVD)Buffer;
    LARGE_INTEGER Position;
    ULONG Count;
    ARC_STATUS Status;
    PISO_VOLUME_INFO Volume;
 
    TRACE("Enter IsoMount(%lu)\n", DeviceId);
 
    /*
     * Read the Primary Volume Descriptor
     */
    Position.HighPart = 0;
    Position.LowPart = 16 * SECTORSIZE;
    Status = ArcSeek(DeviceId, &Position, SeekAbsolute);
    if (Status != ESUCCESS)
        return NULL;
    Status = ArcRead(DeviceId, Pvd, SECTORSIZE, &Count);
    if (Status != ESUCCESS || Count < sizeof(PVD))
        return NULL;
 
    /* Check if the PVD is valid */
    if (!(Pvd->VdType == 1 && RtlEqualMemory(Pvd->StandardId, "CD001", 5) && Pvd->VdVersion == 1))
    {
        WARN("Unrecognized CDROM format\n");
        return NULL;
    }
    if (Pvd->LogicalBlockSizeL != SECTORSIZE)
    {
        ERR("Unsupported LogicalBlockSize %u\n", Pvd->LogicalBlockSizeL);
        return NULL;
    }
 
    Count = (ULONG)((ULONGLONG)Pvd->VolumeSpaceSizeL * SECTORSIZE / 1024 / 1024);
    TRACE("Recognized ISO9660 drive, size %lu MB (%lu sectors)\n",
          Count, Pvd->VolumeSpaceSizeL);
 
    Volume = FrLdrTempAlloc(sizeof(*Volume), TAG_ISO_VOLUME);
    if (!Volume)
        return NULL;
    RtlZeroMemory(Volume, sizeof(*Volume));
 
    /* Cache the PVD information */
    Volume->PvdDirectorySector = Pvd->RootDirRecord.ExtentLocationL;
    Volume->PvdDirectoryLength = Pvd->RootDirRecord.DataLengthL;
 
    IsoVolumes[DeviceId] = Volume;
 
    /* Everything OK, return the ISO9660 function table */
    return &Iso9660FuncTable;
}