DeviceIoControl conversion...

[Guest]

I'm having difficulties converting the GET_CONFIGURATION_HEADER from the
IOCTL_CDROM_GET_CONDIGURATION DeviceIoControl command to usable C# code.

The C struct look like this:

typedef struct _GET_CONFIGURATION_HEADER {
UCHAR DataLength[4];
UCHAR Reserved[2];
UCHAR CurrentProfile[2];
UCHAR Data[0];
} GET_CONFIGURATION_HEADER, *PGET_CONFIGURATION_HEADER;

Taken from this site:
http://msdn.microsoft.com/library/d..._f15044b6-5bbe-4d82-9826-dbe0c96a488c.xml.asp

I hope there is a helpful soul out there who can help me out?

 

[Guest]

Try this:

struct GET_CONFIGURATION_HEADER
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst=4)]
public byte[] DataLength;
private ushort Reserved;
[MarshalAs(UnmanagedType.ByValArray, SizeConst=2)]
public byte[] CurrentProfile;
}


Mattias

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,


For P/Invoke signatures you should take a look at www.pinvoke.net

And please if the one you are looking for is not there and you do it by
yourself just try your best and update the site back

cheers,

 

[Guest]

Try this:

struct GET_CONFIGURATION_HEADER
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst=4)]
public byte[] DataLength;
private ushort Reserved;
[MarshalAs(UnmanagedType.ByValArray, SizeConst=2)]
public byte[] CurrentProfile;
}


Mattias

Yes, this looks good, but there are more to it. The CurrentProfile is
actually an enumerator value of type FEATURE_PROFILE_TYPE:

typedef enum _FEATURE_PROFILE_TYPE {
ProfileInvalid = 0x0000,
ProfileNonRemovableDisk = 0x0001,
ProfileRemovableDisk = 0x0002,
ProfileMOErasable = 0x0003,
ProfileMOWriteOnce = 0x0004,
ProfileAS_MO = 0x0005,
// Reserved 0x0006 - 0x0007
ProfileCdrom = 0x0008,
ProfileCdRecordable = 0x0009,
ProfileCdRewritable = 0x000a,
ProfileDvdRom = 0x0010,
ProfileDvdRecordable = 0x0011,
ProfileDvdRam = 0x0012,
ProfileDvdRewritable = 0x0013,
ProfileDvdRWSequential = 0x0013,
// Reserved - 0x0014,
ProfileDvdPlusRW = 0x001a,
// Reserved - 0x001b,
ProfileDDCdrom = 0x0020,
ProfileDDCdRecordable = 0x0021,
ProfileDDCdRewritable = 0x0022,
// Reserved - 0x0023,
ProfileNonStandard = 0xffff
} FEATURE_PROFILE_TYPE, *PFEATURE_PROFILE_TYPE;

And the Data is FEATURE_HEADER struct:

typedef struct _FEATURE_HEADER {
UCHAR FeatureCode[2];
UCHAR Current:1;
UCHAR Persistent:1;
UCHAR Version:3;
UCHAR Reserved0:2;
UCHAR AdditionalLength;
} FEATURE_HEADER, *PFEATURE_HEADER;

Where FeatureCode is an enumerator value of type FEATURE_NUMBER:

typedef enum _FEATURE_NUMBER {
FeatureProfileList = 0x0000,
FeatureCore = 0x0001,
FeatureMorphing = 0x0002,
FeatureRemovableMedium = 0x0003,
FeatureWriteProtect = 0x0004,
// Reserved 0x0005 - 0x000f
FeatureRandomReadable = 0x0010,
// Reserved 0x0011 - 0x001c
FeatureMultiRead = 0x001d,
FeatureCdRead = 0x001e,
FeatureDvdRead = 0x001f,
FeatureRandomWritable = 0x0020,
FeatureIncrementalStreamingWritable = 0x0021,
FeatureSectorErasable = 0x0022,
FeatureFormattable = 0x0023,
FeatureDefectManagement = 0x0024,
FeatureWriteOnce = 0x0025,
FeatureRestrictedOverwrite = 0x0026,
FeatureCdrwCAVWrite = 0x0027,
FeatureMrw = 0x0028,
// Reserved - 0x0029
FeatureDvdPlusRW = 0x002a,
// Reserved - 0x002b
FeatureRigidRestrictedOverwrite = 0x002c,
FeatureCdTrackAtOnce = 0x002d,
FeatureCdMastering = 0x002e,
FeatureDvdRecordableWrite = 0x002f,
FeatureDDCDRead = 0x0030,
FeatureDDCDRWrite = 0x0031,
FeatureDDCDRWWrite = 0x0032,
// Reserved 0x0030 - 0x00ff
FeaturePowerManagement = 0x0100,
FeatureSMART = 0x0101,
FeatureEmbeddedChanger = 0x0102,
FeatureCDAudioAnalogPlay = 0x0103,
FeatureMicrocodeUpgrade = 0x0104,
FeatureTimeout = 0x0105,
FeatureDvdCSS = 0x0106,
FeatureRealTimeStreaming = 0x0107,
FeatureLogicalUnitSerialNumber = 0x0108,
// Reserved = 0x0109,
FeatureDiscControlBlocks = 0x010a,
FeatureDvdCPRM = 0x010b
// Reserved 0x010c - 0xfeff
// Vendor Unique 0xff00 - 0xffff
} FEATURE_NUMBER, *PFEATURE_NUMBER;

All these structs kind of confuse me...

 

[Guest]

Hi,


For P/Invoke signatures you should take a look at www.pinvoke.net

And please if the one you are looking for is not there and you do it by
yourself just try your best and update the site back

cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

I'm having difficulties converting the GET_CONFIGURATION_HEADER from the
IOCTL_CDROM_GET_CONDIGURATION DeviceIoControl command to usable C# code.

The C struct look like this:

typedef struct _GET_CONFIGURATION_HEADER {
UCHAR DataLength[4];
UCHAR Reserved[2];
UCHAR CurrentProfile[2];
UCHAR Data[0];
} GET_CONFIGURATION_HEADER, *PGET_CONFIGURATION_HEADER;

Taken from this site:
http://msdn.microsoft.com/library/d..._f15044b6-5bbe-4d82-9826-dbe0c96a488c.xml.asp

I hope there is a helpful soul out there who can help me out?

That's a great starting place, but ufortunately GET_CONFIGURATION_HEADER is
not there...

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

Well be nice with the community and post it yourself


cheers,

 

[Guest]

All these structs kind of confuse me...

Well FEATURE_HEADER translates to something like

struct FEATURE_HEADER
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst=2)]
public byte[] FeatureCode;
public byte Current_Persistent_Version;
public byte AdditionalLength;
}

You'll have to manually extract the components of the bitfield (Current,
Persistent, Version) using the bitwise operators.

The enums can almost be used as is, just remove the typedef stuff.


Mattias

 

[Guest]

I dont't really follow you on "extracting the components of the bitfield
using the bitwise operators..."?

All these structs kind of confuse me...

Well FEATURE_HEADER translates to something like

struct FEATURE_HEADER
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst=2)]
public byte[] FeatureCode;
public byte Current_Persistent_Version;
public byte AdditionalLength;
}

You'll have to manually extract the components of the bitfield (Current,
Persistent, Version) using the bitwise operators.

The enums can almost be used as is, just remove the typedef stuff.


Mattias

 

[Mattias Sjögren]

I dont't really follow you on "extracting the components of the bitfield
using the bitwise operators..."?

'Current' is represented by bit 0 in the byte field. To check it you
simply do

current = featureHeader.Current_Persistent_Version & 0x1;

'Version' is stored in bits 2-4 and to read that you do

version = (featureHeader.Current_Persistent_Version >> 2) & 0x7;


Mattias