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Annotation of truecrypt/driver/ntfiledv.c, revision 1.1.1.6

1.1.1.6 ! root        1: /* Legal Notice: The source code contained in this file has been derived from
        !             2:    the source code of Encryption for the Masses 2.02a, which is Copyright (c)
        !             3:    1998-99 Paul Le Roux and which is covered by the 'License Agreement for
        !             4:    Encryption for the Masses'. Modifications and additions to that source code
        !             5:    contained in this file are Copyright (c) 2004-2005 TrueCrypt Foundation and
        !             6:    Copyright (c) 2004 TrueCrypt Team, and are covered by TrueCrypt License 2.0
        !             7:    the full text of which is contained in the file License.txt included in
        !             8:    TrueCrypt binary and source code distribution archives.  */
1.1       root        9: 
                     10: #include "TCdefs.h"
1.1.1.6 ! root       11: #include "Crypto.h"
        !            12: #include "Fat.h"
        !            13: #include "Volumes.h"
        !            14: 
        !            15: #include "Apidrvr.h"
        !            16: #include "Ntdriver.h"
        !            17: #include "Ntvol.h"
        !            18: #include "Ntfiledv.h"
1.1       root       19: 
                     20: #pragma warning( disable : 4127 )
                     21: 
                     22: TCSendIRP_FileDevice (PDEVICE_OBJECT DeviceObject,
                     23:                       PEXTENSION Extension,
                     24:                       PVOID pUserBuffer,
                     25:                       ULONG uFlags,
                     26:                       UCHAR uMajorFunction,
                     27:                       PIRP Irp)
                     28: {
                     29:        PIO_STACK_LOCATION irpOldSp;
                     30:        NTSTATUS ntStatus;
                     31:        PIRP NewIrp;
                     32: 
                     33: //     Dump ("Sending IRP...\n");
                     34: 
                     35:        NewIrp = IoAllocateIrp ((CCHAR) (Extension->pFsdDevice->StackSize + 1), FALSE);
                     36: 
                     37:        irpOldSp = IoGetCurrentIrpStackLocation (Irp);
                     38: 
                     39:        if (NewIrp != NULL)
                     40:        {
                     41:                PIO_STACK_LOCATION irpSp, irpNextSp;
                     42: 
                     43:                NewIrp->UserEvent = NULL;
                     44:                NewIrp->UserIosb = &Irp->IoStatus;
                     45: 
                     46:                /* Doc's say to copy the Tail.Overlay.Thread from the
                     47:                   original Irp but if I do this the user is not prompted on
                     48:                   media removed and other user conditions! */
                     49:                NewIrp->Tail.Overlay.Thread = PsGetCurrentThread ();
                     50:                NewIrp->Tail.Overlay.OriginalFileObject = Extension->pfoDeviceFile;
                     51:                NewIrp->RequestorMode = KernelMode;
                     52: 
                     53:                NewIrp->Flags = uFlags;
                     54: 
                     55:                NewIrp->AssociatedIrp.SystemBuffer = NULL;
                     56:                NewIrp->MdlAddress = NULL;
                     57:                NewIrp->UserBuffer = pUserBuffer;
                     58: 
                     59:                IoSetNextIrpStackLocation (NewIrp);
                     60: 
                     61:                irpSp = IoGetCurrentIrpStackLocation (NewIrp);
                     62:                irpNextSp = IoGetNextIrpStackLocation (NewIrp);
                     63: 
                     64:                irpSp->DeviceObject = DeviceObject;
                     65:                irpSp->FileObject = Extension->pfoDeviceFile;
                     66: 
                     67:                irpNextSp->MajorFunction = irpSp->MajorFunction = uMajorFunction;
                     68:                irpNextSp->MinorFunction = irpSp->MinorFunction = irpSp->MinorFunction;
                     69:                irpNextSp->DeviceObject = Extension->pFsdDevice;
                     70:                irpNextSp->FileObject = Extension->pfoDeviceFile;
                     71:                /* Copy our flags down one level, this is to get the proper
                     72:                   removable-media handling */
                     73:                irpNextSp->Flags = irpSp->Flags = irpOldSp->Flags;
                     74:                /* Copy over io parameters, this is a union, so it handles
                     75:                   deviceiocontrol & read/write */
                     76:                irpNextSp->Parameters.Read.Length = irpSp->Parameters.Read.Length = irpOldSp->Parameters.Read.Length;
                     77:                irpNextSp->Parameters.Read.ByteOffset = irpSp->Parameters.Read.ByteOffset = irpOldSp->Parameters.Read.ByteOffset;
                     78:                irpNextSp->Parameters.Read.Key = irpSp->Parameters.Read.Key = irpOldSp->Parameters.Read.Key;
                     79:        }
                     80:        else
                     81:        {
                     82:                TCfree (pUserBuffer);   /* Free the temp buffer we allocated
                     83:                                           for the IRP */
                     84: 
                     85:                /* Complete the processing of the original Irp */
                     86:                return COMPLETE_IRP (DeviceObject, Irp, STATUS_INSUFFICIENT_RESOURCES, 0);
                     87:        }
                     88: 
                     89:        IoSetCompletionRoutine (NewIrp, TCCompletion, Irp, TRUE, TRUE, TRUE);
                     90: 
                     91:        ntStatus = IoCallDriver (Extension->pFsdDevice, NewIrp);
                     92:        //if (ntStatus == STATUS_PENDING)
                     93:        //{
                     94:        //      Dump ("Pending returned!\n");
                     95:        //}
                     96: 
                     97: //     Dump ("IRP Sent!\n");
                     98:        return ntStatus;
                     99: }

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