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windows-xp/Source/XPSP1/NT/base/fs/srv/pipe.c

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/*++
Copyright (c) 1990 Microsoft Corporation
Module Name:
smbpipe.c
Abstract:
This module contains the code for handling named pipe based transact
SMB's.
Functions that are handled are:
SrvCallNamedPipe
SrvWaitNamedPipe
SrvQueryInfoNamedPipe
SrvQueryStateNamedPipe
SrvSetStateNamedPipe
SrvPeekNamedPipe
SrvTransactNamedPipe
Author:
Manny Weiser (9-18-90)
Revision History:
--*/
#include "precomp.h"
#include "pipe.tmh"
#pragma hdrstop
#define BugCheckFileId SRV_FILE_PIPE
STATIC
VOID SRVFASTCALL
RestartCallNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
);
STATIC
VOID SRVFASTCALL
RestartWaitNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
);
STATIC
VOID SRVFASTCALL
RestartPeekNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
);
VOID SRVFASTCALL
RestartRawWriteNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
);
STATIC
VOID SRVFASTCALL
RestartTransactNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
);
NTSTATUS
RestartFastTransactNamedPipe (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN OUT PWORK_CONTEXT WorkContext
);
VOID SRVFASTCALL
RestartFastTransactNamedPipe2 (
IN OUT PWORK_CONTEXT WorkContext
);
VOID SRVFASTCALL
RestartReadNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
);
VOID SRVFASTCALL
RestartWriteNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text( PAGE, SrvCallNamedPipe )
#pragma alloc_text( PAGE, SrvWaitNamedPipe )
#pragma alloc_text( PAGE, SrvQueryStateNamedPipe )
#pragma alloc_text( PAGE, SrvQueryInformationNamedPipe )
#pragma alloc_text( PAGE, SrvSetStateNamedPipe )
#pragma alloc_text( PAGE, SrvPeekNamedPipe )
#pragma alloc_text( PAGE, SrvTransactNamedPipe )
#pragma alloc_text( PAGE, SrvFastTransactNamedPipe )
#pragma alloc_text( PAGE, SrvRawWriteNamedPipe )
#pragma alloc_text( PAGE, SrvReadNamedPipe )
#pragma alloc_text( PAGE, SrvWriteNamedPipe )
#pragma alloc_text( PAGE, RestartCallNamedPipe )
#pragma alloc_text( PAGE, RestartWaitNamedPipe )
#pragma alloc_text( PAGE, RestartPeekNamedPipe )
#pragma alloc_text( PAGE, RestartReadNamedPipe )
#pragma alloc_text( PAGE, RestartTransactNamedPipe )
#pragma alloc_text( PAGE, RestartRawWriteNamedPipe )
#pragma alloc_text( PAGE, RestartFastTransactNamedPipe2 )
#pragma alloc_text( PAGE, RestartWriteNamedPipe )
#pragma alloc_text( PAGE8FIL, RestartFastTransactNamedPipe )
#endif
SMB_TRANS_STATUS
SrvCallNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function processes a Call Named pipe request from a
Transaction SMB. This call is handled asynchronously and
is completed in RestartCallNamedPipe.
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
HANDLE fileHandle;
IO_STATUS_BLOCK ioStatusBlock;
OBJECT_ATTRIBUTES objectAttributes;
PFILE_OBJECT fileObject;
OBJECT_HANDLE_INFORMATION handleInformation;
PTRANSACTION transaction;
NTSTATUS status;
UNICODE_STRING pipePath;
UNICODE_STRING fullName;
FILE_PIPE_INFORMATION pipeInformation;
PIRP irp = WorkContext->Irp;
PIO_STACK_LOCATION irpSp;
PAGED_CODE( );
//
// Strip "\PIPE\" prefix from the path string.
//
pipePath = WorkContext->Parameters.Transaction->TransactionName;
if ( pipePath.Length <=
(UNICODE_SMB_PIPE_PREFIX_LENGTH + sizeof(WCHAR)) ) {
SrvSetSmbError( WorkContext, STATUS_INVALID_SMB );
return SmbTransStatusErrorWithoutData;
}
pipePath.Buffer +=
(UNICODE_SMB_PIPE_PREFIX_LENGTH / sizeof(WCHAR)) + 1;
pipePath.Length -= UNICODE_SMB_PIPE_PREFIX_LENGTH + sizeof(WCHAR);
//
// Attempt to open the named pipe.
//
SrvAllocateAndBuildPathName(
&SrvNamedPipeRootDirectory,
&pipePath,
NULL,
&fullName
);
if ( fullName.Buffer == NULL ) {
//
// Unable to allocate heap for the full name.
//
IF_DEBUG(ERRORS) {
SrvPrint0( "SrvCallNamedPipe: Unable to allocate heap for full path name\n" );
}
SrvSetSmbError (WorkContext, STATUS_INSUFF_SERVER_RESOURCES);
IF_DEBUG(TRACE2) SrvPrint0( "SrvCallNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
SrvInitializeObjectAttributes_U(
&objectAttributes,
&fullName,
OBJ_CASE_INSENSITIVE,
NULL,
NULL
);
INCREMENT_DEBUG_STAT( SrvDbgStatistics.TotalOpenAttempts );
status = SrvIoCreateFile(
WorkContext,
&fileHandle,
GENERIC_READ | GENERIC_WRITE,
&objectAttributes,
&ioStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
FILE_SHARE_READ | FILE_SHARE_WRITE,
FILE_OPEN,
0, // Create Options
NULL, // EA Buffer
0, // EA Length
CreateFileTypeNone,
(PVOID)NULL, // Create parameters
IO_FORCE_ACCESS_CHECK,
NULL
);
FREE_HEAP( fullName.Buffer );
//
// If the user didn't have this permission, update the statistics
// database.
//
if ( status == STATUS_ACCESS_DENIED ) {
SrvStatistics.AccessPermissionErrors++;
}
if (!NT_SUCCESS(status)) {
//
// The server could not open the requested name pipe,
// return the error.
//
IF_SMB_DEBUG(OPEN_CLOSE1) {
SrvPrint2( "SrvCallNamedPipe: Failed to open %ws, err=%x\n",
WorkContext->Parameters.Transaction->TransactionName.Buffer, status );
}
SrvSetSmbError (WorkContext, status);
IF_DEBUG(TRACE2) SrvPrint0( "SrvCallNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
SRVDBG_CLAIM_HANDLE( fileHandle, "FIL", 15, 0 );
SrvStatistics.TotalFilesOpened++;
//
// Get a pointer to the file object, so that we can directly
// build IRPs for asynchronous operations (read and write).
// Also, get the granted access mask, so that we can prevent the
// client from doing things that it isn't allowed to do.
//
status = ObReferenceObjectByHandle(
fileHandle,
0,
NULL,
KernelMode,
(PVOID *)&fileObject,
&handleInformation
);
if ( !NT_SUCCESS(status) ) {
SrvLogServiceFailure( SRV_SVC_OB_REF_BY_HANDLE, status );
//
// This internal error bugchecks the system.
//
INTERNAL_ERROR(
ERROR_LEVEL_IMPOSSIBLE,
"SrvCallNamedPipe: unable to reference file handle 0x%lx",
fileHandle,
NULL
);
SrvSetSmbError( WorkContext, status );
IF_DEBUG(TRACE2) SrvPrint0( "SrvCallNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// Save file handle for the completion routine.
//
transaction = WorkContext->Parameters.Transaction;
transaction->FileHandle = fileHandle;
transaction->FileObject = fileObject;
//
// Set the pipe to message mode, so that we can preform a transceive
//
pipeInformation.CompletionMode = FILE_PIPE_QUEUE_OPERATION;
pipeInformation.ReadMode = FILE_PIPE_MESSAGE_MODE;
status = NtSetInformationFile (
fileHandle,
&ioStatusBlock,
(PVOID)&pipeInformation,
sizeof(pipeInformation),
FilePipeInformation
);
if ( !NT_SUCCESS(status) ) {
INTERNAL_ERROR(
ERROR_LEVEL_UNEXPECTED,
"SrvCallNamedPipe: NtSetInformationFile (pipe information) "
"returned %X",
status,
NULL
);
SrvLogServiceFailure( SRV_SVC_NT_SET_INFO_FILE, status );
SrvSetSmbError( WorkContext, status );
IF_DEBUG(TRACE2) SrvPrint0( "SrvCallNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// Set the Restart Routine addresses in the work context block.
//
WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
WorkContext->FspRestartRoutine = RestartCallNamedPipe;
transaction = WorkContext->Parameters.Transaction;
//
// Build the IRP to start a pipe transceive.
// Pass this request to NPFS.
//
//
// Inline SrvBuildIoControlRequest
//
{
//
// Get a pointer to the next stack location. This one is used to
// hold the parameters for the device I/O control request.
//
irpSp = IoGetNextIrpStackLocation( irp );
//
// Set up the completion routine.
//
IoSetCompletionRoutine(
irp,
SrvFsdIoCompletionRoutine,
(PVOID)WorkContext,
TRUE,
TRUE,
TRUE
);
irpSp->MajorFunction = IRP_MJ_FILE_SYSTEM_CONTROL;
irpSp->MinorFunction = 0;
irpSp->DeviceObject = IoGetRelatedDeviceObject(fileObject);
irpSp->FileObject = fileObject;
irp->Tail.Overlay.OriginalFileObject = irpSp->FileObject;
irp->Tail.Overlay.Thread = WorkContext->CurrentWorkQueue->IrpThread;
DEBUG irp->RequestorMode = KernelMode;
irp->MdlAddress = NULL;
irp->AssociatedIrp.SystemBuffer = transaction->OutData;
irpSp->Parameters.DeviceIoControl.Type3InputBuffer =
transaction->InData;
//
// Copy the caller's parameters to the service-specific portion of the
// IRP for those parameters that are the same for all three methods.
//
irpSp->Parameters.FileSystemControl.OutputBufferLength =
transaction->MaxDataCount;
irpSp->Parameters.FileSystemControl.InputBufferLength =
transaction->DataCount;
irpSp->Parameters.FileSystemControl.FsControlCode =
FSCTL_PIPE_INTERNAL_TRANSCEIVE;
}
(VOID)IoCallDriver(
irpSp->DeviceObject,
irp
);
//
// The tranceive was successfully started. Return the InProgress
// status to the caller, indicating that the caller should do
// nothing further with the SMB/WorkContext at the present time.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvCallNamedPipe complete\n" );
return SmbTransStatusInProgress;
} // SrvCallNamedPipe
SMB_TRANS_STATUS
SrvWaitNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function processes a Wait named pipe transaction SMB.
It issues an asynchronous call to NPFS. The function
completetion is handled by RestartWaitNamedPipe().
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PFILE_PIPE_WAIT_FOR_BUFFER pipeWaitBuffer;
PREQ_TRANSACTION request;
PTRANSACTION transaction;
UNICODE_STRING pipePath;
CLONG nameLength;
PAGED_CODE( );
request = (PREQ_TRANSACTION)WorkContext->RequestParameters;
transaction = WorkContext->Parameters.Transaction;
//
// Allocate and fill in FILE_PIPE_WAIT_FOR_BUFFER structure.
//
pipePath = transaction->TransactionName;
if ( pipePath.Length <= (UNICODE_SMB_PIPE_PREFIX_LENGTH + sizeof(WCHAR)) ) {
//
// The transaction name does not include a pipe name. It's
// either \PIPE or \PIPE\, or it doesn't even have \PIPE.
//
SrvSetSmbError( WorkContext, STATUS_INVALID_SMB );
return SmbTransStatusErrorWithoutData;
}
nameLength = pipePath.Length -
(UNICODE_SMB_PIPE_PREFIX_LENGTH + sizeof(WCHAR)) +
sizeof(WCHAR);
pipeWaitBuffer = ALLOCATE_NONPAGED_POOL(
sizeof(FILE_PIPE_WAIT_FOR_BUFFER) + nameLength,
BlockTypeDataBuffer
);
if ( pipeWaitBuffer == NULL ) {
//
// We could not allocate space for the buffer to issue the
// pipe wait. Fail the request.
//
SrvSetSmbError( WorkContext, STATUS_INSUFF_SERVER_RESOURCES );
IF_DEBUG(TRACE2) SrvPrint0( "SrvWaitNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// Copy the pipe name not including "\PIPE\" to the pipe wait for
// buffer.
//
pipeWaitBuffer->NameLength = nameLength - sizeof(WCHAR);
RtlCopyMemory(
pipeWaitBuffer->Name,
(PUCHAR)pipePath.Buffer + UNICODE_SMB_PIPE_PREFIX_LENGTH + sizeof(WCHAR),
nameLength
);
//
// Fill in the pipe timeout value if necessary.
//
if ( SmbGetUlong( &request->Timeout ) == 0 ) {
pipeWaitBuffer->TimeoutSpecified = FALSE;
} else {
pipeWaitBuffer->TimeoutSpecified = TRUE;
//
// Convert timeout time from milliseconds to NT relative time.
//
pipeWaitBuffer->Timeout.QuadPart = -1 *
UInt32x32To64( SmbGetUlong( &request->Timeout ), 10*1000 );
}
//
// Set the Restart Routine addresses in the work context block.
//
WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
WorkContext->FspRestartRoutine = RestartWaitNamedPipe;
//
// Build a Wait named pipe IRP and pass the request to NPFS.
//
SrvBuildIoControlRequest(
WorkContext->Irp,
SrvNamedPipeFileObject,
WorkContext,
IRP_MJ_FILE_SYSTEM_CONTROL,
FSCTL_PIPE_WAIT,
pipeWaitBuffer,
sizeof(*pipeWaitBuffer) + nameLength,
NULL,
0,
NULL,
NULL
);
(VOID)IoCallDriver( SrvNamedPipeDeviceObject, WorkContext->Irp );
//
// The tranceive was successfully started. Return the InProgress
// status to the caller, indicating that the caller should do
// nothing further with the SMB/WorkContext at the present time.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvWaitNamedPipe complete\n" );
return SmbTransStatusInProgress;
} // SrvWaitNamedPipe
SMB_TRANS_STATUS
SrvQueryStateNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function processes a Query Named pipe transaction SMB.
Since this call cannot block it is handled synchronously.
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PREQ_TRANSACTION request;
PTRANSACTION transaction;
HANDLE pipeHandle;
IO_STATUS_BLOCK ioStatusBlock;
USHORT pipeHandleState;
FILE_PIPE_INFORMATION pipeInformation;
FILE_PIPE_LOCAL_INFORMATION pipeLocalInformation;
NTSTATUS status;
USHORT fid;
PRFCB rfcb;
PAGED_CODE( );
request = (PREQ_TRANSACTION)WorkContext->RequestParameters;
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
NULL, // don't serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvQueryStateNamedPipe: Invalid FID: 0x%lx\n", fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryStateNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
pipeHandle = rfcb->Lfcb->FileHandle;
status = NtQueryInformationFile (
pipeHandle,
&ioStatusBlock,
(PVOID)&pipeInformation,
sizeof(pipeInformation),
FilePipeInformation
);
if (!NT_SUCCESS(status)) {
INTERNAL_ERROR(
ERROR_LEVEL_UNEXPECTED,
"SrvQueryStateNamedPipe: NtQueryInformationFile (pipe "
"information) returned %X",
status,
NULL
);
SrvLogServiceFailure( SRV_SVC_NT_QUERY_INFO_FILE, status );
SrvSetSmbError( WorkContext, status );
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryStateNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
status = NtQueryInformationFile (
pipeHandle,
&ioStatusBlock,
(PVOID)&pipeLocalInformation,
sizeof(pipeLocalInformation),
FilePipeLocalInformation
);
if (!NT_SUCCESS(status)) {
INTERNAL_ERROR(
ERROR_LEVEL_UNEXPECTED,
"SrvQueryStateNamedPipe: NtQueryInformationFile (pipe local "
"information) returned %X",
status,
NULL
);
SrvLogServiceFailure( SRV_SVC_NT_QUERY_INFO_FILE, status );
SrvSetSmbError( WorkContext, status );
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryStateNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// Query succeeded generate response
//
pipeHandleState = (USHORT)pipeInformation.CompletionMode
<< PIPE_COMPLETION_MODE_BITS;
pipeHandleState |= (USHORT)pipeLocalInformation.NamedPipeEnd
<< PIPE_PIPE_END_BITS;
pipeHandleState |= (USHORT)pipeLocalInformation.NamedPipeType
<< PIPE_PIPE_TYPE_BITS;
pipeHandleState |= (USHORT)pipeInformation.ReadMode
<< PIPE_READ_MODE_BITS;
pipeHandleState |= (USHORT)((pipeLocalInformation.MaximumInstances
<< PIPE_MAXIMUM_INSTANCES_BITS)
& SMB_PIPE_UNLIMITED_INSTANCES);
SmbPutUshort(
(PSMB_USHORT)WorkContext->Parameters.Transaction->OutParameters,
pipeHandleState
);
transaction->SetupCount = 0;
transaction->ParameterCount = sizeof(pipeHandleState);
transaction->DataCount = 0;
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryStateNamedPipe complete\n" );
return SmbTransStatusSuccess;
} // SrvQueryStateNamedPipe
SMB_TRANS_STATUS
SrvQueryInformationNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function process a Query named pipe information transaction
SMB. This call is handled synchronously.
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PREQ_TRANSACTION request;
PTRANSACTION transaction;
HANDLE pipeHandle;
IO_STATUS_BLOCK ioStatusBlock;
FILE_PIPE_LOCAL_INFORMATION pipeLocalInformation;
PNAMED_PIPE_INFORMATION_1 namedPipeInfo;
NTSTATUS status;
USHORT fid;
PRFCB rfcb;
PLFCB lfcb;
USHORT level;
CLONG smbPathLength;
PUNICODE_STRING pipeName;
CLONG actualDataSize;
BOOLEAN returnPipeName;
BOOLEAN isUnicode;
PAGED_CODE( );
request = (PREQ_TRANSACTION)WorkContext->RequestParameters;
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
NULL, // don't serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvQueryStateNamedPipe: Invalid FID: 0x%lx\n", fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryInfoNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
lfcb = rfcb->Lfcb;
pipeHandle = lfcb->FileHandle;
//
// The information level is stored in paramter byte one.
// Verify that is set correctly.
//
level = SmbGetUshort( (PSMB_USHORT)transaction->InParameters );
if ( level != 1 ) {
SrvSetSmbError( WorkContext, STATUS_INVALID_PARAMETER );
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryInfoNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// Now check that the response will fit. If everything expect for
// the pipe name fits, return STATUS_BUFFER_OVERFLOW with the
// fixed size portion of the data.
//
// *** Note that Unicode strings must be aligned in the SMB.
//
pipeName = &lfcb->Mfcb->FileName;
actualDataSize = sizeof(NAMED_PIPE_INFORMATION_1) - sizeof(UCHAR);
isUnicode = SMB_IS_UNICODE( WorkContext );
if ( isUnicode ) {
ASSERT( sizeof(WCHAR) == 2 );
actualDataSize = (actualDataSize + 1) & ~1; // align to SHORT
smbPathLength = (CLONG)(pipeName->Length) + sizeof(WCHAR);
} else {
smbPathLength = (CLONG)(RtlUnicodeStringToOemSize( pipeName ));
}
actualDataSize += smbPathLength;
if ( transaction->MaxDataCount <
FIELD_OFFSET(NAMED_PIPE_INFORMATION_1, PipeName ) ) {
SrvSetSmbError( WorkContext, STATUS_BUFFER_TOO_SMALL );
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryInfoNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
if ( (transaction->MaxDataCount < actualDataSize) ||
(smbPathLength >= MAXIMUM_FILENAME_LENGTH) ) {
//
// Do not return the pipe name. It won't fit in the return buffer.
//
returnPipeName = FALSE;
} else {
returnPipeName = TRUE;
}
//
// Everything is correct, ask NPFS for the information.
//
status = NtQueryInformationFile (
pipeHandle,
&ioStatusBlock,
(PVOID)&pipeLocalInformation,
sizeof(pipeLocalInformation),
FilePipeLocalInformation
);
if (!NT_SUCCESS(status)) {
INTERNAL_ERROR(
ERROR_LEVEL_UNEXPECTED,
"SrvQueryInformationNamedPipe: NtQueryInformationFile (pipe "
"information) returned %X",
status,
NULL
);
SrvLogServiceFailure( SRV_SVC_NT_QUERY_INFO_FILE, status );
SrvSetSmbError( WorkContext, status );
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryInfoNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// Query succeeded format the response data into the buffer pointed
// at by transaction->OutData
//
namedPipeInfo = (PNAMED_PIPE_INFORMATION_1)transaction->OutData;
if ((pipeLocalInformation.OutboundQuota & 0xffff0000) != 0) {
SmbPutAlignedUshort(
&namedPipeInfo->OutputBufferSize,
(USHORT)0xFFFF
);
} else {
SmbPutAlignedUshort(
&namedPipeInfo->OutputBufferSize,
(USHORT)pipeLocalInformation.OutboundQuota
);
}
if ((pipeLocalInformation.InboundQuota & 0xffff0000) != 0) {
SmbPutAlignedUshort(
&namedPipeInfo->InputBufferSize,
(USHORT)0xFFFF
);
} else {
SmbPutAlignedUshort(
&namedPipeInfo->InputBufferSize,
(USHORT)pipeLocalInformation.InboundQuota
);
}
if ((pipeLocalInformation.MaximumInstances & 0xffffff00) != 0) {
namedPipeInfo->MaximumInstances = (UCHAR)0xFF;
} else {
namedPipeInfo->MaximumInstances =
(UCHAR)pipeLocalInformation.MaximumInstances;
}
if ((pipeLocalInformation.CurrentInstances & 0xffffff00) != 0) {
namedPipeInfo->CurrentInstances = (UCHAR)0xFF;
} else {
namedPipeInfo->CurrentInstances =
(UCHAR)pipeLocalInformation.CurrentInstances;
}
if ( returnPipeName ) {
//
// Copy full pipe path name to the output buffer, appending a NUL.
//
// *** Note that Unicode pipe names must be aligned in the SMB.
//
namedPipeInfo->PipeNameLength = (UCHAR)smbPathLength;
if ( isUnicode ) {
PVOID buffer = ALIGN_SMB_WSTR( namedPipeInfo->PipeName );
RtlCopyMemory( buffer, pipeName->Buffer, smbPathLength );
} else {
UNICODE_STRING source;
OEM_STRING destination;
source.Buffer = pipeName->Buffer;
source.Length = pipeName->Length;
source.MaximumLength = source.Length;
destination.Buffer = (PCHAR) namedPipeInfo->PipeName;
destination.MaximumLength = (USHORT)smbPathLength;
RtlUnicodeStringToOemString(
&destination,
&source,
FALSE
);
}
transaction->DataCount = actualDataSize;
} else {
SrvSetSmbError2( WorkContext, STATUS_BUFFER_OVERFLOW, TRUE );
transaction->DataCount =
FIELD_OFFSET( NAMED_PIPE_INFORMATION_1, PipeName );
}
//
// Set up to send success response
//
transaction->SetupCount = 0;
transaction->ParameterCount = 0;
IF_DEBUG(TRACE2) SrvPrint0( "SrvQueryInfoNamedPipe complete\n" );
if ( returnPipeName) {
return SmbTransStatusSuccess;
} else {
return SmbTransStatusErrorWithData;
}
} // SrvQueryInformationNamedPipe
SMB_TRANS_STATUS
SrvSetStateNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function processes a set named pipe handle state transaction
SMB. The call is issued synchronously.
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PREQ_TRANSACTION request;
PTRANSACTION transaction;
HANDLE pipeHandle;
IO_STATUS_BLOCK ioStatusBlock;
USHORT pipeHandleState;
FILE_PIPE_INFORMATION pipeInformation;
NTSTATUS status;
USHORT fid;
PRFCB rfcb;
PAGED_CODE( );
request = (PREQ_TRANSACTION)WorkContext->RequestParameters;
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
NULL, // don't serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvSetStateNamedPipe: Invalid FID: 0x%lx\n", fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvSetStateNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
pipeHandle = rfcb->Lfcb->FileHandle;
//
// The SMB contains 2 parameter bytes. Translate these to
// NT format, then attempt to set the named pipe handle state.
//
pipeHandleState = SmbGetUshort(
(PSMB_USHORT)
WorkContext->Parameters.Transaction->InParameters
);
pipeInformation.CompletionMode =
((ULONG)pipeHandleState >> PIPE_COMPLETION_MODE_BITS) & 1;
pipeInformation.ReadMode =
((ULONG)pipeHandleState >> PIPE_READ_MODE_BITS) & 1;
status = NtSetInformationFile (
pipeHandle,
&ioStatusBlock,
(PVOID)&pipeInformation,
sizeof(pipeInformation),
FilePipeInformation
);
if (NT_SUCCESS(status) ) {
status = ioStatusBlock.Status;
}
if (!NT_SUCCESS(status)) {
INTERNAL_ERROR(
ERROR_LEVEL_UNEXPECTED,
"SrvSetStateNamedPipe: NetSetInformationFile (pipe information) "
"returned %X",
status,
NULL
);
SrvLogServiceFailure( SRV_SVC_NT_SET_INFO_FILE, status );
SrvSetSmbError( WorkContext, status );
IF_DEBUG(TRACE2) SrvPrint0( "SrvSetStateNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// Success. Update our internal pipe handle state.
//
rfcb->BlockingModePipe =
(BOOLEAN)(pipeInformation.CompletionMode ==
FILE_PIPE_QUEUE_OPERATION);
rfcb->ByteModePipe =
(BOOLEAN)(pipeInformation.ReadMode == FILE_PIPE_BYTE_STREAM_MODE);
//
// Now set up for the success response.
//
transaction->SetupCount = 0;
transaction->ParameterCount = 0;
transaction->DataCount = 0;
IF_DEBUG(TRACE2) SrvPrint0( "SrvSetStateNamedPipe complete\n" );
return SmbTransStatusSuccess;
} // SrvSetStateNamedPipe
SMB_TRANS_STATUS
SrvPeekNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function handles a peek named pipe transaction SMB. The
call is issued asynchrously and is completed by RestartPeekNamedPipe().
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
status - The result of the operation.
--*/
{
PTRANSACTION transaction;
USHORT fid;
PRFCB rfcb;
PLFCB lfcb;
NTSTATUS status;
PAGED_CODE( );
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
SrvRestartExecuteTransaction, // serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
if ( !NT_SUCCESS( status ) ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvPeekNamedPipe: Invalid FID: 0x%lx\n", fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvPeekNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// The work item has been queued because a raw write is in
// progress.
//
return SmbTransStatusInProgress;
}
//
// Set the Restart Routine addresses in the work context block.
//
WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
WorkContext->FspRestartRoutine = RestartPeekNamedPipe;
//
// Issue the request to NPFS. We expect both parameters and
// data to be returned. The buffer which we offer is contiguous
// and large enough to contain both.
//
transaction = WorkContext->Parameters.Transaction;
lfcb = rfcb->Lfcb;
SrvBuildIoControlRequest(
WorkContext->Irp,
lfcb->FileObject,
WorkContext,
IRP_MJ_FILE_SYSTEM_CONTROL,
FSCTL_PIPE_PEEK,
transaction->OutParameters,
0,
NULL,
transaction->MaxParameterCount + transaction->MaxDataCount,
NULL,
NULL
);
//
// Pass the request to NPFS.
//
(VOID)IoCallDriver( lfcb->DeviceObject, WorkContext->Irp );
//
// The peek was successfully started. Return the InProgress
// status to the caller, indicating that the caller should do
// nothing further with the SMB/WorkContext at the present time.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvPeekNamedPipe complete\n" );
return SmbTransStatusInProgress;
} // SrvPeekNamedPipe
SMB_TRANS_STATUS
SrvTransactNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function handles the transact named pipe transaction SMB.
The call to NPFS is issued asynchronously and is completed by
RestartTransactNamedPipe()
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PTRANSACTION transaction;
USHORT fid;
PRFCB rfcb;
NTSTATUS status;
PIO_STACK_LOCATION irpSp;
PIRP irp = WorkContext->Irp;
PAGED_CODE( );
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
SrvRestartExecuteTransaction, // serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
if ( !NT_SUCCESS( status ) ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvTransactStateNamedPipe: Invalid FID: 0x%lx\n",
fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvTransactNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// The work item has been queued because a raw write is in
// progress.
//
return SmbTransStatusInProgress;
}
//
// Set the Restart Routine addresses in the work context block.
//
WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
WorkContext->FspRestartRoutine = RestartTransactNamedPipe;
transaction = WorkContext->Parameters.Transaction;
//
// Inline SrvBuildIoControlRequest
//
{
//
// Get a pointer to the next stack location. This one is used to
// hold the parameters for the device I/O control request.
//
irpSp = IoGetNextIrpStackLocation( irp );
//
// Set up the completion routine.
//
IoSetCompletionRoutine(
irp,
SrvFsdIoCompletionRoutine,
(PVOID)WorkContext,
TRUE,
TRUE,
TRUE
);
irpSp->MajorFunction = IRP_MJ_FILE_SYSTEM_CONTROL;
irpSp->MinorFunction = 0;
irpSp->DeviceObject = rfcb->Lfcb->DeviceObject;
irpSp->FileObject = rfcb->Lfcb->FileObject;
irp->Tail.Overlay.OriginalFileObject = irpSp->FileObject;
irp->Tail.Overlay.Thread = WorkContext->CurrentWorkQueue->IrpThread;
DEBUG irp->RequestorMode = KernelMode;
irp->MdlAddress = NULL;
irp->AssociatedIrp.SystemBuffer = transaction->OutData;
irpSp->Parameters.DeviceIoControl.Type3InputBuffer =
transaction->InData;
//
// Copy the caller's parameters to the service-specific portion of the
// IRP for those parameters that are the same for all three methods.
//
irpSp->Parameters.FileSystemControl.OutputBufferLength =
transaction->MaxDataCount;
irpSp->Parameters.FileSystemControl.InputBufferLength =
transaction->DataCount;
irpSp->Parameters.FileSystemControl.FsControlCode =
FSCTL_PIPE_INTERNAL_TRANSCEIVE;
}
//
// Pass the request to NPFS.
//
(VOID)IoCallDriver( irpSp->DeviceObject, irp );
//
// The tranceive was successfully started. Return the InProgress
// status to the caller, indicating that the caller should do
// nothing further with the SMB/WorkContext at the present time.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvTransactNamedPipe complete\n" );
return SmbTransStatusInProgress;
} // SrvTransactNamedPipe
BOOLEAN
SrvFastTransactNamedPipe (
IN OUT PWORK_CONTEXT WorkContext,
OUT SMB_STATUS * SmbStatus
)
/*++
Routine Description:
This function handles the special case of a single buffer transact
named pipe transaction SMB. The call to NPFS is issued asynchronously
and is completed by RestartFastTransactNamedPipe()
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
SmbStatus - Status of the transaction.
Return Value:
TRUE, if fastpath succeeded,
FALSE, otherwise. Server must take long path.
--*/
{
USHORT fid;
PRFCB rfcb;
PSESSION session;
NTSTATUS status;
PIO_STACK_LOCATION irpSp;
PIRP irp = WorkContext->Irp;
CLONG outputBufferSize;
CLONG maxParameterCount;
CLONG maxDataCount;
PSMB_USHORT inSetup;
PSMB_USHORT outSetup;
PCHAR outParam;
PCHAR outData;
CLONG offset;
CLONG setupOffset;
PREQ_TRANSACTION request;
PRESP_TRANSACTION response;
PSMB_HEADER header;
PAGED_CODE( );
header = WorkContext->ResponseHeader;
request = (PREQ_TRANSACTION)WorkContext->RequestParameters;
response = (PRESP_TRANSACTION)WorkContext->ResponseParameters;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
setupOffset = (CLONG)((CLONG_PTR)(request->Buffer) - (CLONG_PTR)header);
inSetup = (PSMB_USHORT)( (PCHAR)header + setupOffset );
fid = SmbGetUshort( &inSetup[1] );
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
SrvRestartSmbReceived, // serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
if ( !NT_SUCCESS( status ) ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvTransactStateNamedPipe: Invalid FID: 0x%lx\n",
fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvTransactNamedPipe complete\n" );
*SmbStatus = SmbStatusSendResponse;
return TRUE;
}
//
// The work item has been queued because a raw write is in
// progress.
//
*SmbStatus = SmbStatusInProgress;
return TRUE;
}
//
// See and see if all the data will fit into the response buffer.
// Reject the long path if not the case.
// The "+1" on the MaxSetupCount calculation below accounts for the
// USHORT byte count in the buffer.
//
maxParameterCount = SmbGetUshort( &request->MaxParameterCount );
maxDataCount = SmbGetUshort( &request->MaxDataCount );
session = rfcb->Lfcb->Session;
outputBufferSize = ((maxParameterCount * sizeof(CHAR) + 3) & ~3) +
((maxDataCount * sizeof(CHAR) + 3) & ~3) +
(((request->MaxSetupCount + 1) * sizeof(USHORT) + 3) & ~3);
if ( sizeof(SMB_HEADER) +
sizeof (RESP_TRANSACTION) +
outputBufferSize
> (ULONG)session->MaxBufferSize) {
//
// This won't fit. Use the long path.
//
return(FALSE);
}
//
// If this operation may block, and we are running short of
// free work items, fail this SMB with an out of resources error.
//
if ( SrvReceiveBufferShortage( ) ) {
SrvStatistics.BlockingSmbsRejected++;
SrvSetSmbError(
WorkContext,
STATUS_INSUFF_SERVER_RESOURCES
);
*SmbStatus = SmbStatusSendResponse;
return TRUE;
} else {
//
// SrvBlockingOpsInProgress has already been incremented.
// Flag this work item as a blocking operation.
//
WorkContext->BlockingOperation = TRUE;
}
//
// Set the Restart Routine addresses in the work context block.
//
DEBUG WorkContext->FsdRestartRoutine = NULL;
//
// Setup pointers and locals.
//
outSetup = (PSMB_USHORT)response->Buffer;
//
// The "+1" on the end of the following calculation is to account
// for the USHORT byte count, which could overwrite data in certain
// cases should the MaxSetupCount be 0.
//
outParam = (PCHAR)(outSetup + (request->MaxSetupCount + 1));
offset = (CLONG)((outParam - (PCHAR)header + 3) & ~3);
outParam = (PCHAR)header + offset;
outData = outParam + maxParameterCount;
offset = (CLONG)((outData - (PCHAR)header + 3) & ~3);
outData = (PCHAR)header + offset;
//
// Fill in the work context parameters.
//
WorkContext->Parameters.FastTransactNamedPipe.OutSetup = outSetup;
WorkContext->Parameters.FastTransactNamedPipe.OutParam = outParam;
WorkContext->Parameters.FastTransactNamedPipe.OutData = outData;
//
// Inline SrvBuildIoControlRequest
//
{
//
// Get a pointer to the next stack location. This one is used to
// hold the parameters for the device I/O control request.
//
irpSp = IoGetNextIrpStackLocation( irp );
//
// Set up the completion routine.
//
IoSetCompletionRoutine(
irp,
RestartFastTransactNamedPipe,
(PVOID)WorkContext,
TRUE,
TRUE,
TRUE
);
irpSp->MajorFunction = IRP_MJ_FILE_SYSTEM_CONTROL;
irpSp->MinorFunction = 0;
irpSp->DeviceObject = rfcb->Lfcb->DeviceObject;
irpSp->FileObject = rfcb->Lfcb->FileObject;
irp->Tail.Overlay.OriginalFileObject = irpSp->FileObject;
irp->Tail.Overlay.Thread = WorkContext->CurrentWorkQueue->IrpThread;
DEBUG irp->RequestorMode = KernelMode;
irp->MdlAddress = NULL;
irp->AssociatedIrp.SystemBuffer = outData;
irpSp->Parameters.DeviceIoControl.Type3InputBuffer =
(PCHAR)header + SmbGetUshort( &request->DataOffset );
//
// Copy the caller's parameters to the service-specific portion of the
// IRP for those parameters that are the same for all three methods.
//
irpSp->Parameters.FileSystemControl.OutputBufferLength = maxDataCount;
irpSp->Parameters.FileSystemControl.InputBufferLength =
SmbGetUshort( &request->DataCount );
irpSp->Parameters.FileSystemControl.FsControlCode =
FSCTL_PIPE_INTERNAL_TRANSCEIVE;
}
//
// Pass the request to NPFS.
//
(VOID)IoCallDriver( irpSp->DeviceObject, irp );
//
// The tranceive was successfully started. Return the InProgress
// status to the caller, indicating that the caller should do
// nothing further with the SMB/WorkContext at the present time.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvTransactNamedPipe complete\n" );
*SmbStatus = SmbStatusInProgress;
return TRUE;
} // SrvFastTransactNamedPipe
SMB_TRANS_STATUS
SrvRawWriteNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function handles the raw write named pipe transaction SMB.
The call to NPFS is issued asynchronously and is completed by
RestartRawWriteNamedPipe().
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PTRANSACTION transaction;
USHORT fid;
PRFCB rfcb;
NTSTATUS status;
PAGED_CODE( );
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
SrvRestartExecuteTransaction, // serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
if ( !NT_SUCCESS( status ) ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvRawWriteStateNamedPipe: Invalid FID: 0x%lx\n",
fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvRawWriteNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// The work item has been queued because a raw write is in
// progress.
//
return SmbTransStatusInProgress;
}
//
// We only allow the special 0 bytes message mode write. Otherwise
// reject the request.
//
if ( transaction->DataCount != 2 ||
transaction->InData[0] != 0 ||
transaction->InData[1] != 0 ||
rfcb->ByteModePipe ) {
SrvSetSmbError( WorkContext, STATUS_INVALID_PARAMETER );
return SmbTransStatusErrorWithoutData;
}
//
// Set the Restart Routine addresses in the work context block.
//
WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
WorkContext->FspRestartRoutine = RestartRawWriteNamedPipe;
SrvBuildIoControlRequest(
WorkContext->Irp,
rfcb->Lfcb->FileObject,
WorkContext,
IRP_MJ_FILE_SYSTEM_CONTROL,
FSCTL_PIPE_INTERNAL_WRITE,
transaction->InData,
0,
NULL,
0,
NULL,
NULL
);
//
// Pass the request to NPFS.
//
IoCallDriver( rfcb->Lfcb->DeviceObject, WorkContext->Irp );
//
// The write was successfully started. Return the InProgress
// status to the caller, indicating that the caller should do
// nothing further with the SMB/WorkContext at the present time.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvRawWriteNamedPipe complete\n" );
return SmbTransStatusInProgress;
} // SrvRawWriteNamedPipe
VOID SRVFASTCALL
RestartCallNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvCallNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
NTSTATUS status;
PTRANSACTION transaction;
PAGED_CODE( );
//
// If the transceive request failed, set an error status in the response
// header.
//
status = WorkContext->Irp->IoStatus.Status;
transaction = WorkContext->Parameters.Transaction;
if ( status == STATUS_BUFFER_OVERFLOW ) {
//
// Down level clients, expect us to return STATUS_SUCCESS.
//
if ( !IS_NT_DIALECT( WorkContext->Connection->SmbDialect ) ) {
status = STATUS_SUCCESS;
} else {
//
// The buffer we supplied is not big enough. Set the
// error fields in the SMB, but continue so that we send
// all the information.
//
SrvSetSmbError2( WorkContext, STATUS_BUFFER_OVERFLOW, TRUE );
}
} else if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) {
SrvPrint1( "RestartCallNamedPipe: Pipe transceive failed: %X\n",
status );
}
SrvSetSmbError( WorkContext, status );
} else {
//
// Success. Prepare to generate and send the response.
//
transaction->SetupCount = 0;
transaction->ParameterCount = 0;
transaction->DataCount = (ULONG)WorkContext->Irp->IoStatus.Information;
}
//
// Close the open pipe handle.
//
SRVDBG_RELEASE_HANDLE( transaction->FileHandle, "FIL", 19, transaction );
SrvNtClose( transaction->FileHandle, TRUE );
ObDereferenceObject( transaction->FileObject );
//
// Respond to the client
//
if ( NT_SUCCESS(status) ) {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusSuccess);
} else if ( status == STATUS_BUFFER_OVERFLOW ) {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusErrorWithData);
} else {
IF_DEBUG(ERRORS) SrvPrint1( "Pipe call failed: %X\n", status );
SrvSetSmbError( WorkContext, status );
SrvCompleteExecuteTransaction(
WorkContext,
SmbTransStatusErrorWithoutData
);
}
IF_DEBUG(TRACE2) SrvPrint0( "RestartCallNamedPipe complete\n" );
return;
} // RestartCallNamedPipe
VOID SRVFASTCALL
RestartWaitNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvWaitNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
PTRANSACTION transaction;
NTSTATUS status;
PAGED_CODE( );
//
// Deallocate the wait buffer.
//
DEALLOCATE_NONPAGED_POOL( WorkContext->Irp->AssociatedIrp.SystemBuffer );
//
// If the wait request failed, set an error status in the response
// header.
//
status = WorkContext->Irp->IoStatus.Status;
if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) SrvPrint1( "Pipe wait failed: %X\n", status );
SrvSetSmbError( WorkContext, status );
SrvCompleteExecuteTransaction(
WorkContext,
SmbTransStatusErrorWithoutData
);
IF_DEBUG(TRACE2) SrvPrint0( "RestartWaitNamedPipe complete\n" );
return;
}
//
// Success. Prepare to generate and send the response.
//
transaction = WorkContext->Parameters.Transaction;
transaction->SetupCount = 0;
transaction->ParameterCount = 0;
transaction->DataCount = 0;
//
// Generate and send the response.
//
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusSuccess);
IF_DEBUG(TRACE2) SrvPrint0( "RestartWaitNamedPipe complete\n" );
return;
} // RestartWaitNamedPipe
VOID SRVFASTCALL
RestartPeekNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for PeekNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
NTSTATUS status;
PFILE_PIPE_PEEK_BUFFER pipePeekBuffer;
PRESP_PEEK_NMPIPE respPeekNmPipe;
USHORT readDataAvailable, messageLength, namedPipeState;
PTRANSACTION transaction;
PAGED_CODE( );
//
// If the peek request failed, set an error status in the response
// header.
//
status = WorkContext->Irp->IoStatus.Status;
if ( status == STATUS_BUFFER_OVERFLOW ) {
//
// Down level clients, expect us to return STATUS_SUCCESS.
//
if ( !IS_NT_DIALECT( WorkContext->Connection->SmbDialect ) ) {
status = STATUS_SUCCESS;
} else {
//
// The buffer we supplied is not big enough. Set the
// error fields in the SMB, but continue so that we send
// all the information.
//
SrvSetSmbError2( WorkContext, STATUS_BUFFER_OVERFLOW, TRUE );
}
} else if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) SrvPrint1( "Pipe peek failed: %X\n", status );
SrvSetSmbError( WorkContext, status );
SrvCompleteExecuteTransaction(
WorkContext,
SmbTransStatusErrorWithoutData
);
IF_DEBUG(TRACE2) SrvPrint0( "RestartPeekNamedPipe complete\n" );
return;
}
//
// Success. Generate and send the response.
//
// The parameter bytes are currently in the format returned by NT.
// we will reformat them, and leave the extra space between the
// parameter and data bytes as extra pad.
//
//
// Since the NT and SMB formats overlap
// First read all the parameters into locals...
//
transaction = WorkContext->Parameters.Transaction;
pipePeekBuffer = (PFILE_PIPE_PEEK_BUFFER)transaction->OutParameters;
readDataAvailable = (USHORT)pipePeekBuffer->ReadDataAvailable;
messageLength = (USHORT)pipePeekBuffer->MessageLength;
namedPipeState = (USHORT)pipePeekBuffer->NamedPipeState;
//
// ... then copy them back in the new format.
//
respPeekNmPipe = (PRESP_PEEK_NMPIPE)pipePeekBuffer;
SmbPutAlignedUshort(
&respPeekNmPipe->ReadDataAvailable,
readDataAvailable
);
SmbPutAlignedUshort(
&respPeekNmPipe->MessageLength,
messageLength
);
SmbPutAlignedUshort(
&respPeekNmPipe->NamedPipeState,
namedPipeState
);
//
// Send the response. Set the output counts.
//
// NT return to us 4 ULONGS of parameter bytes, followed by data.
// We return to the client 6 parameter bytes.
//
transaction->SetupCount = 0;
transaction->ParameterCount = 6;
transaction->DataCount = (ULONG)WorkContext->Irp->IoStatus.Information -
(4 * sizeof(ULONG));
if (NT_SUCCESS(status)) {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusSuccess);
} else {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusErrorWithData);
}
IF_DEBUG(TRACE2) SrvPrint0( "RestartPeekNamedPipe complete\n" );
return;
} // RestartPeekNamedPipe
VOID SRVFASTCALL
RestartTransactNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvTransactNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
NTSTATUS status;
PTRANSACTION transaction;
PAGED_CODE( );
//
// If the transceive request failed, set an error status in the response
// header.
//
status = WorkContext->Irp->IoStatus.Status;
if ( status == STATUS_BUFFER_OVERFLOW ) {
#if 0
//
// Down level clients, expect us to return STATUS_SUCCESS.
//
if ( !IS_NT_DIALECT( WorkContext->Connection->SmbDialect ) ) {
status = STATUS_SUCCESS;
} else {
//
// The buffer we supplied is not big enough. Set the
// error fields in the SMB, but continue so that we send
// all the information.
//
SrvSetSmbError2( WorkContext, STATUS_BUFFER_OVERFLOW, TRUE );
}
#else
//
// os/2 returns ERROR_MORE_DATA in this case, why we convert
// this to NO_ERROR is a mystery.
//
SrvSetSmbError2( WorkContext, STATUS_BUFFER_OVERFLOW, TRUE );
#endif
} else if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) SrvPrint1( "Pipe transceive failed: %X\n", status );
SrvSetSmbError(WorkContext, status);
SrvCompleteExecuteTransaction(
WorkContext,
SmbTransStatusErrorWithoutData
);
IF_DEBUG(TRACE2) SrvPrint0( "RestartTransactNamedPipe complete\n" );
return;
}
//
// Success. Generate and send the response.
//
transaction = WorkContext->Parameters.Transaction;
transaction->SetupCount = 0;
transaction->ParameterCount = 0;
transaction->DataCount = (ULONG)WorkContext->Irp->IoStatus.Information;
if ( NT_SUCCESS(status) ) {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusSuccess);
} else {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusErrorWithData);
}
IF_DEBUG(TRACE2) SrvPrint0( "RestartTransactNamedPipe complete\n" );
return;
} // RestartTransactNamedpipe
NTSTATUS
RestartFastTransactNamedPipe (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvFastTransactNamedPipe
Arguments:
DeviceObject - Pointer to target device object for the request.
Irp - Pointer to I/O request packet
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
STATUS_MORE_PROCESSING_REQUIRED.
--*/
{
NTSTATUS status;
PSMB_HEADER header;
PRESP_TRANSACTION response;
PSMB_USHORT byteCountPtr;
PCHAR paramPtr;
CLONG paramOffset;
PCHAR dataPtr;
CLONG dataOffset;
CLONG dataLength;
CLONG sendLength;
UNLOCKABLE_CODE( 8FIL );
//
// Reset the IRP cancelled bit.
//
Irp->Cancel = FALSE;
//
// If the transceive request failed, set an error status in the response
// header.
//
status = WorkContext->Irp->IoStatus.Status;
if ( status == STATUS_BUFFER_OVERFLOW ) {
//
// os/2 returns ERROR_MORE_DATA in this case, why we convert
// this to NO_ERROR is a mystery.
//
SrvSetBufferOverflowError( WorkContext );
} else if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) SrvPrint1( "Pipe transceive failed: %X\n", status );
if ( KeGetCurrentIrql() >= DISPATCH_LEVEL ) {
WorkContext->FspRestartRoutine = RestartFastTransactNamedPipe2;
QUEUE_WORK_TO_FSP( WorkContext );
return STATUS_MORE_PROCESSING_REQUIRED;
}
RestartFastTransactNamedPipe2( WorkContext );
goto error_no_data;
}
//
// Success. Generate and send the response.
//
dataLength = (CLONG)WorkContext->Irp->IoStatus.Information;
header = WorkContext->ResponseHeader;
//
// Save a pointer to the byte count field.
//
// If the output data and parameters are not already in the SMB
// buffer we must calculate how much of the parameters and data can
// be sent in this response. The maximum amount we can send is
// minimum of the size of our buffer and the size of the client's
// buffer.
//
// The parameter and data byte blocks are aligned on longword
// boundaries in the message.
//
byteCountPtr = WorkContext->Parameters.FastTransactNamedPipe.OutSetup;
//
// The data and paramter are already in the SMB buffer. The entire
// response will fit in one response buffer and there is no copying
// to do.
//
paramPtr = WorkContext->Parameters.FastTransactNamedPipe.OutParam;
paramOffset = (CLONG)(paramPtr - (PCHAR)header);
dataPtr = WorkContext->Parameters.FastTransactNamedPipe.OutData;
dataOffset = (CLONG)(dataPtr - (PCHAR)header);
//
// The client wants a response. Build the first (and possibly only)
// response. The last received SMB of the transaction request was
// retained for this purpose.
//
response = (PRESP_TRANSACTION)WorkContext->ResponseParameters;
//
// Build the parameters portion of the response.
//
response->WordCount = (UCHAR)10;
SmbPutUshort( &response->TotalParameterCount,
(USHORT)0
);
SmbPutUshort( &response->TotalDataCount,
(USHORT)dataLength
);
SmbPutUshort( &response->Reserved, 0 );
response->SetupCount = (UCHAR)0;
response->Reserved2 = 0;
//
// We need to be sure we're not sending uninitialized kernel memory
// back to the client with the response, so zero out the range between
// byteCountPtr and dataPtr.
//
RtlZeroMemory(byteCountPtr,(ULONG)(dataPtr - (PCHAR)byteCountPtr));
//
// Finish filling in the response parameters.
//
SmbPutUshort( &response->ParameterCount, (USHORT)0 );
SmbPutUshort( &response->ParameterOffset, (USHORT)paramOffset );
SmbPutUshort( &response->ParameterDisplacement, 0 );
SmbPutUshort( &response->DataCount, (USHORT)dataLength );
SmbPutUshort( &response->DataOffset, (USHORT)dataOffset );
SmbPutUshort( &response->DataDisplacement, 0 );
SmbPutUshort(
byteCountPtr,
(USHORT)(dataPtr - (PCHAR)(byteCountPtr + 1) + dataLength)
);
//
// Calculate the length of the response message.
//
sendLength = (CLONG)( dataPtr + dataLength -
(PCHAR)WorkContext->ResponseHeader );
WorkContext->ResponseBuffer->DataLength = sendLength;
//
// Set the bit in the SMB that indicates this is a response from the
// server.
//
WorkContext->ResponseHeader->Flags |= SMB_FLAGS_SERVER_TO_REDIR;
//
// Send the response.
//
SRV_START_SEND_2(
WorkContext,
SrvFsdRestartSmbAtSendCompletion,
NULL,
NULL
);
error_no_data:
//
// The response send is in progress. The caller will assume
// the we will handle send completion.
//
// Return STATUS_MORE_PROCESSING_REQUIRED so that IoCompleteRequest
// will stop working on the IRP.
//
IF_DEBUG(TRACE2) SrvPrint0( "RestartTransactNamedPipe complete\n" );
return STATUS_MORE_PROCESSING_REQUIRED;
} // RestartFastTransactNamedPipe
VOID SRVFASTCALL
RestartFastTransactNamedPipe2 (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvFastTransactNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
PAGED_CODE( );
//
// The transceive request failed. Set an error status in the response
// header.
//
SrvSetSmbError( WorkContext, WorkContext->Irp->IoStatus.Status );
//
// An error occurred, so no transaction-specific response data
// will be returned.
//
// Calculate the length of the response message.
//
WorkContext->ResponseBuffer->DataLength =
(CLONG)( (PCHAR)WorkContext->ResponseParameters -
(PCHAR)WorkContext->ResponseHeader );
//
// Send the response.
//
SRV_START_SEND_2(
WorkContext,
SrvFsdRestartSmbAtSendCompletion,
NULL,
NULL
);
return;
} // RestartFastTransactNamedPipe2
VOID SRVFASTCALL
RestartRawWriteNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvRawWriteNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
NTSTATUS status;
PTRANSACTION transaction;
PAGED_CODE( );
//
// If the write request failed, set an error status in the response
// header.
//
status = WorkContext->Irp->IoStatus.Status;
if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) SrvPrint1( "Pipe raw write failed: %X\n", status );
SrvSetSmbError( WorkContext, status );
SrvCompleteExecuteTransaction(
WorkContext,
SmbTransStatusErrorWithoutData
);
IF_DEBUG(TRACE2) SrvPrint0( "RestartRawWriteNamedPipe complete\n" );
return;
}
//
// Success. Generate and send the response.
//
transaction = WorkContext->Parameters.Transaction;
transaction->SetupCount = 0;
transaction->ParameterCount = 2;
transaction->DataCount = 0;
SmbPutUshort( (PSMB_USHORT)transaction->OutParameters, 2 );
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusSuccess);
IF_DEBUG(TRACE2) SrvPrint0( "RestartRawWriteNamedPipe complete\n" );
return;
} // RestartRawWriteNamedpipe
SMB_TRANS_STATUS
SrvWriteNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function handles the raw write named pipe transaction SMB.
The call to NPFS is issued asynchronously and is completed by
RestartRawWriteNamedPipe().
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PTRANSACTION transaction;
USHORT fid;
PRFCB rfcb;
PLFCB lfcb;
NTSTATUS status;
LARGE_INTEGER offset;
ULONG key = 0;
PCHAR writeAddress;
CLONG writeLength;
PAGED_CODE( );
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
IF_DEBUG(IPX_PIPES) {
KdPrint(("SrvWriteNamedPipe: fid = %x length = %d\n",
fid, transaction->DataCount));
}
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
SrvRestartExecuteTransaction, // serialize with raw write
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
if ( !NT_SUCCESS( status ) ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvWriteNamedPipe: Invalid FID: 0x%lx\n",
fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvWriteNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// The work item has been queued because a raw write is in
// progress.
//
return SmbTransStatusInProgress;
}
lfcb = rfcb->Lfcb;
writeLength = transaction->DataCount;
writeAddress = transaction->InData;
//
// Try the fast I/O path first. If that fails, fall through to the
// normal build-an-IRP path.
//
if ( lfcb->FastIoWrite != NULL ) {
INCREMENT_DEBUG_STAT2( SrvDbgStatistics.FastWritesAttempted );
try {
if ( lfcb->FastIoWrite(
lfcb->FileObject,
&offset,
writeLength,
TRUE,
key,
writeAddress,
&WorkContext->Irp->IoStatus,
lfcb->DeviceObject
) ) {
//
// The fast I/O path worked. Call the restart routine directly
// to do postprocessing (including sending the response).
//
RestartWriteNamedPipe( WorkContext );
IF_DEBUG(IPX_PIPES) SrvPrint0( "SrvWriteNamedPipe complete.\n" );
return SmbTransStatusInProgress;
}
}
except( EXCEPTION_EXECUTE_HANDLER ) {
// Fall through to the slow path on an exception
NTSTATUS status = GetExceptionCode();
IF_DEBUG(ERRORS) {
KdPrint(("FastIoRead threw exception %x\n", status ));
}
}
INCREMENT_DEBUG_STAT2( SrvDbgStatistics.FastWritesFailed );
}
IF_DEBUG(IPX_PIPES) {
KdPrint(("SrvWriteNamedPipe: Using slow path.\n"));
}
//
// The turbo path failed. Build the write request, reusing the
// receive IRP.
//
// Build the PIPE_INTERNAL_WRITE IRP.
//
SrvBuildIoControlRequest(
WorkContext->Irp,
lfcb->FileObject,
WorkContext,
IRP_MJ_FILE_SYSTEM_CONTROL,
FSCTL_PIPE_INTERNAL_WRITE,
writeAddress,
writeLength,
NULL,
0,
NULL,
NULL
);
//
// Pass the request to the file system.
//
WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
WorkContext->FspRestartRoutine = RestartWriteNamedPipe;
(VOID)IoCallDriver( lfcb->DeviceObject, WorkContext->Irp );
//
// The write has been started. Control will return to
// RestartWriteNamedPipe when the write completes.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvWriteNamedPipe complete\n" );
return SmbTransStatusInProgress;
} // SrvWriteNamedPipe
VOID SRVFASTCALL
RestartWriteNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvRawWriteNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
NTSTATUS status;
PIO_STATUS_BLOCK iosb;
PTRANSACTION transaction;
PAGED_CODE( );
//
// If the write request failed, set an error status in the response
// header.
//
iosb = &WorkContext->Irp->IoStatus;
status = iosb->Status;
IF_DEBUG(IPX_PIPES) {
KdPrint(("RestartWriteNamedPipe: Status = %x\n", status));
}
if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) SrvPrint1( " pipe write failed: %X\n", status );
SrvSetSmbError( WorkContext, status );
SrvCompleteExecuteTransaction(
WorkContext,
SmbTransStatusErrorWithoutData
);
IF_DEBUG(TRACE2) SrvPrint0( "RestartWriteNamedPipe complete\n" );
return;
}
//
// Success. Generate and send the response.
//
transaction = WorkContext->Parameters.Transaction;
transaction->SetupCount = 0;
transaction->ParameterCount = 2;
transaction->DataCount = 0;
SmbPutUshort( (PSMB_USHORT)transaction->OutParameters,
(USHORT)iosb->Information
);
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusSuccess);
IF_DEBUG(TRACE2) SrvPrint0( "RestartWriteNamedPipe complete\n" );
return;
} // RestartWriteNamedPipe
SMB_TRANS_STATUS
SrvReadNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This function handles the raw Read named pipe transaction SMB.
The call to NPFS is issued asynchronously and is completed by
RestartRawReadNamedPipe().
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
SMB_TRANS_STATUS - Indicates whether an error occurred. See
smbtypes.h for a more complete description.
--*/
{
PTRANSACTION transaction;
USHORT fid;
PRFCB rfcb;
PLFCB lfcb;
NTSTATUS status;
LARGE_INTEGER offset;
ULONG key = 0;
PCHAR readAddress;
CLONG readLength;
PAGED_CODE( );
transaction = WorkContext->Parameters.Transaction;
//
// Get the FID from the second setup word and use it to generate a
// pointer to the RFCB.
//
// SrvVerifyFid will fill in WorkContext->Rfcb.
//
fid = SmbGetUshort( &transaction->InSetup[1] );
IF_DEBUG(IPX_PIPES) {
KdPrint(("SrvReadNamedPipe: fid = %x length = %d\n",
fid, transaction->MaxDataCount));
}
rfcb = SrvVerifyFid(
WorkContext,
fid,
FALSE,
SrvRestartExecuteTransaction, // serialize with raw Read
&status
);
if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
if ( !NT_SUCCESS( status ) ) {
//
// Invalid file ID. Reject the request.
//
IF_DEBUG(SMB_ERRORS) {
SrvPrint1( "SrvReadNamedPipe: Invalid FID: 0x%lx\n",
fid );
}
SrvSetSmbError( WorkContext, STATUS_INVALID_HANDLE );
IF_DEBUG(TRACE2) SrvPrint0( "SrvReadNamedPipe complete\n" );
return SmbTransStatusErrorWithoutData;
}
//
// The work item has been queued because a raw Read is in
// progress.
//
return SmbTransStatusInProgress;
}
lfcb = rfcb->Lfcb;
readLength = transaction->MaxDataCount;
readAddress = transaction->OutData;
//
// Try the fast I/O path first. If that fails, fall through to the
// normal build-an-IRP path.
//
if ( lfcb->FastIoRead != NULL ) {
INCREMENT_DEBUG_STAT2( SrvDbgStatistics.FastReadsAttempted );
try {
if ( lfcb->FastIoRead(
lfcb->FileObject,
&offset,
readLength,
TRUE,
key,
readAddress,
&WorkContext->Irp->IoStatus,
lfcb->DeviceObject
) ) {
//
// The fast I/O path worked. Call the restart routine directly
// to do postprocessing (including sending the response).
//
RestartReadNamedPipe( WorkContext );
IF_SMB_DEBUG(READ_WRITE2) SrvPrint0( "SrvReadNamedPipe complete.\n" );
return SmbTransStatusInProgress;
}
}
except( EXCEPTION_EXECUTE_HANDLER ) {
// Fall through to the slow path on an exception
NTSTATUS status = GetExceptionCode();
IF_DEBUG(ERRORS) {
KdPrint(("FastIoRead threw exception %x\n", status ));
}
}
INCREMENT_DEBUG_STAT2( SrvDbgStatistics.FastReadsFailed );
}
//
// The turbo path failed. Build the Read request, reusing the
// receive IRP.
//
// Build the PIPE_INTERNAL_READ IRP.
//
SrvBuildIoControlRequest(
WorkContext->Irp,
lfcb->FileObject,
WorkContext,
IRP_MJ_FILE_SYSTEM_CONTROL,
FSCTL_PIPE_INTERNAL_READ,
readAddress,
0,
NULL,
readLength,
NULL,
NULL
);
//
// Pass the request to the file system.
//
WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
WorkContext->FspRestartRoutine = RestartReadNamedPipe;
(VOID)IoCallDriver( lfcb->DeviceObject, WorkContext->Irp );
//
// The Read has been started. Control will return to
// SrvFsdRestartRead when the Read completes.
//
IF_DEBUG(TRACE2) SrvPrint0( "SrvReadNamedPipe complete\n" );
return SmbTransStatusInProgress;
} // SrvReadNamedPipe
VOID SRVFASTCALL
RestartReadNamedPipe (
IN OUT PWORK_CONTEXT WorkContext
)
/*++
Routine Description:
This is the completion routine for SrvRawReadNamedPipe
Arguments:
WorkContext - A pointer to a WORK_CONTEXT block.
Return Value:
None.
--*/
{
NTSTATUS status;
PTRANSACTION transaction;
PAGED_CODE( );
//
// If the transceive request failed, set an error status in the response
// header.
//
status = WorkContext->Irp->IoStatus.Status;
if ( status == STATUS_BUFFER_OVERFLOW ) {
SrvSetSmbError2( WorkContext, STATUS_BUFFER_OVERFLOW, TRUE );
} else if ( !NT_SUCCESS(status) ) {
IF_DEBUG(ERRORS) SrvPrint1( "Pipe transceive failed: %X\n", status );
SrvSetSmbError(WorkContext, status);
SrvCompleteExecuteTransaction(
WorkContext,
SmbTransStatusErrorWithoutData
);
IF_DEBUG(TRACE2) SrvPrint0( "RestartReadNamedPipe complete\n" );
return;
}
//
// Success. Generate and send the response.
//
transaction = WorkContext->Parameters.Transaction;
transaction->SetupCount = 0;
transaction->ParameterCount = 0;
transaction->DataCount = (ULONG)WorkContext->Irp->IoStatus.Information;
if ( NT_SUCCESS(status) ) {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusSuccess);
} else {
SrvCompleteExecuteTransaction(WorkContext, SmbTransStatusErrorWithData);
}
IF_DEBUG(TRACE2) SrvPrint0( "RestartReadNamedPipe complete\n" );
return;
} // RestartReadNamedPipe