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windows-nt/Source/XPSP1/NT/ds/netapi/xactsrv/apifile.c

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/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
ApiFile.c
Abstract:
This module contains individual API handlers for the NetFile APIs.
SUPPORTED - NetFileClose2, NetFileEnum2, NetFileGetInfo2.
Author:
Shanku Niyogi (w-shanku) 20-Feb-1991
Revision History:
--*/
#include "XactSrvP.h"
//
// Declaration of descriptor strings.
//
STATIC const LPDESC Desc16_file_info_2 = REM16_file_info_2;
STATIC const LPDESC Desc32_file_info_2 = REM32_file_info_2;
STATIC const LPDESC Desc16_file_info_3 = REM16_file_info_3;
STATIC const LPDESC Desc32_file_info_3 = REM32_file_info_3;
NTSTATUS
XsNetFileClose2 (
API_HANDLER_PARAMETERS
)
/*++
Routine Description:
This routine handles a call to NetFileClose.
Arguments:
API_HANDLER_PARAMETERS - information about the API call. See
XsTypes.h for details.
Return Value:
NTSTATUS - STATUS_SUCCESS or reason for failure.
--*/
{
NET_API_STATUS status;
PXS_NET_FILE_CLOSE_2 parameters = Parameters;
API_HANDLER_PARAMETERS_REFERENCE; // Avoid warnings
try {
//
// Make the local call.
//
status = NetFileClose(
NULL,
SmbGetUlong( &parameters->FileId )
);
} except( EXCEPTION_EXECUTE_HANDLER ) {
status = (WORD)RtlNtStatusToDosError( GetExceptionCode() );
}
if ( !XsApiSuccess( status )) {
IF_DEBUG(ERRORS) {
NetpKdPrint(( "XsNetFileClose2: NetFileClose failed: %X\n",
status ));
}
}
//
// No return data.
//
Header->Status = (WORD)status;
return STATUS_SUCCESS;
} // XsNetFileClose2
NTSTATUS
XsNetFileEnum2 (
API_HANDLER_PARAMETERS
)
/*++
Routine Description:
This routine handles a call to NetFileEnum.
Arguments:
API_HANDLER_PARAMETERS - information about the API call. See
XsTypes.h for details.
Return Value:
NTSTATUS - STATUS_SUCCESS or reason for failure.
--*/
{
NET_API_STATUS status;
PXS_NET_FILE_ENUM_2 parameters = Parameters;
LPTSTR nativeBasePath = NULL; // Native parameters
LPTSTR nativeUserName = NULL;
LPVOID outBuffer = NULL;
DWORD entriesRead;
DWORD totalEntries;
DWORD_PTR resumeKey = 0;
DWORD entriesFilled = 0; // Conversion variables
DWORD totalEntriesRead = 0;
DWORD bytesRequired = 0;
DWORD nativeBufferSize;
LPDESC nativeStructureDesc;
LPBYTE bufferBegin;
DWORD bufferSize;
API_HANDLER_PARAMETERS_REFERENCE; // Avoid warnings
IF_DEBUG(FILE) {
NetpKdPrint(( "XsNetFileEnum2: header at %lx, params at %lx, "
"level %ld, buf size %ld\n",
Header, parameters, SmbGetUshort( &parameters->Level ),
SmbGetUshort( &parameters->BufLen )));
}
try {
//
// Translate parameters, check for errors.
//
XsConvertTextParameter(
nativeBasePath,
(LPSTR)XsSmbGetPointer( &parameters->BasePath )
);
XsConvertTextParameter(
nativeUserName,
(LPSTR)XsSmbGetPointer( &parameters->UserName )
);
//
// Copy input resume handle to output resume handle, and get a copy of it.
//
if ( SmbGetUlong( &parameters->ResumeKeyIn ) == 0 ) {
Header->Status = ERROR_INVALID_PARAMETER;
goto cleanup;
}
RtlCopyMemory( parameters->ResumeKeyOut,
(LPBYTE)XsSmbGetPointer( &parameters->ResumeKeyIn ), 8 );
resumeKey = (DWORD)SmbGetUlong( &parameters->ResumeKeyOut[2] );
IF_DEBUG(FILE) {
NetpKdPrint(( "XsNetFileEnum2: resume key is %ld\n", resumeKey ));
}
//
// Use the level to determine the descriptor string.
//
switch ( SmbGetUshort( &parameters->Level ) ) {
case 2:
StructureDesc = Desc16_file_info_2;
nativeStructureDesc = Desc32_file_info_2;
break;
case 3:
StructureDesc = Desc16_file_info_3;
nativeStructureDesc = Desc32_file_info_3;
break;
default:
//
// Unsupported levels, abort before any work.
//
Header->Status = ERROR_INVALID_LEVEL;
goto cleanup;
}
//
// NetFileEnum2 is a resumable API, so we cannot get more information
// from the native call than we can send back. The most efficient way
// to do this is in a loop...we use the 16-bit buffer size to determine
// a safe native buffer size, make the call, fill the entries, then
// take the amount of space remaining and determine a safe size again,
// and so on, until NetFileEnum returns either no entries or all entries
// read.
//
//
// Initialize important variables for loop.
//
bufferBegin = (LPBYTE)XsSmbGetPointer( &parameters->Buffer );
bufferSize = (DWORD)SmbGetUshort( &parameters->BufLen );
totalEntriesRead = 0;
for ( ; ; ) {
//
// Compute a safe size for the native buffer.
//
switch ( SmbGetUshort( &parameters->Level ) ) {
case 2:
nativeBufferSize = bufferSize;
break;
case 3:
nativeBufferSize = bufferSize;
break;
}
//
// Make the local call.
//
status = NetFileEnum(
NULL,
nativeBasePath,
nativeUserName,
(DWORD)SmbGetUshort( &parameters->Level ),
(LPBYTE *)&outBuffer,
nativeBufferSize,
&entriesRead,
&totalEntries,
&resumeKey
);
if ( !XsApiSuccess( status )) {
IF_DEBUG(API_ERRORS) {
NetpKdPrint(( "XsNetFileEnum2: NetFileEnum failed: %X\n",
status ));
}
Header->Status = (WORD)status;
goto cleanup;
}
IF_DEBUG(FILE) {
NetpKdPrint(( "XsNetFileEnum2: received %ld entries at %lx\n",
entriesRead, outBuffer ));
NetpKdPrint(( "XsNetFileEnum2: resume key is now %Id\n",
resumeKey ));
}
//
// Was NetFileEnum able to read at least one complete entry?
//
if ( entriesRead == 0 ) {
break;
}
//
// Do the actual conversion from the 32-bit structures to 16-bit
// structures.
//
XsFillEnumBuffer(
outBuffer,
entriesRead,
nativeStructureDesc,
bufferBegin,
(LPBYTE)XsSmbGetPointer( &parameters->Buffer ),
bufferSize,
StructureDesc,
NULL, // verify function
&bytesRequired,
&entriesFilled,
NULL
);
IF_DEBUG(FILE) {
NetpKdPrint(( "32-bit data at %lx, 16-bit data at %lx, %ld BR,"
" Entries %ld of %ld\n",
outBuffer, SmbGetUlong( &parameters->Buffer ),
bytesRequired, entriesFilled, totalEntries ));
}
//
// Very key assertion!
//
NetpAssert( entriesRead == entriesFilled );
//
// Update count of entries read.
//
totalEntriesRead += entriesRead;
//
// Are there any more entries to read?
//
if ( entriesRead == totalEntries ) {
break;
}
//
// Calculate new buffer beginning and size.
//
bufferBegin += entriesRead *
RapStructureSize( StructureDesc, Response, FALSE );
bufferSize -= bytesRequired;
//
// Free last native buffer.
//
NetApiBufferFree( outBuffer );
outBuffer = NULL;
}
//
// Upon exit from the loop, totalEntriesRead has the number of entries
// read, entriesRead has the number read in the last call, totalEntries
// has the number remaining plus entriesRead. Formulate return codes,
// etc. from these values.
//
if ( totalEntries > entriesRead ) {
Header->Status = ERROR_MORE_DATA;
} else {
Header->Converter = XsPackReturnData(
(LPVOID)XsSmbGetPointer( &parameters->Buffer ),
SmbGetUshort( &parameters->BufLen ),
StructureDesc,
totalEntriesRead
);
}
IF_DEBUG(FILE) {
NetpKdPrint(( "XsNetFileEnum2: resume key is now %ld\n", resumeKey ));
}
//
// Set up the response parameters.
//
SmbPutUshort( &parameters->EntriesRead, (WORD)totalEntriesRead );
SmbPutUshort( &parameters->EntriesRemaining,
(WORD)( totalEntries - entriesRead ));
//
// Over the wire, resumeKey is a true 32-bit index, so this cast works.
//
SmbPutUlong( (LPDWORD)&parameters->ResumeKeyOut[2], (DWORD)resumeKey );
cleanup:
;
} except( EXCEPTION_EXECUTE_HANDLER ) {
Header->Status = (WORD)RtlNtStatusToDosError( GetExceptionCode() );
}
NetApiBufferFree( outBuffer );
NetpMemoryFree( nativeBasePath );
NetpMemoryFree( nativeUserName );
//
// Determine return buffer size.
//
XsSetDataCount(
&parameters->BufLen,
StructureDesc,
Header->Converter,
totalEntriesRead,
Header->Status
);
return STATUS_SUCCESS;
} // XsNetFileEnum2
NTSTATUS
XsNetFileGetInfo2 (
API_HANDLER_PARAMETERS
)
/*++
Routine Description:
This routine handles a call to NetFileGetInfo2.
Arguments:
API_HANDLER_PARAMETERS - information about the API call. See
XsTypes.h for details.
Return Value:
NTSTATUS - STATUS_SUCCESS or reason for failure.
--*/
{
NET_API_STATUS status;
PXS_NET_FILE_GET_INFO_2 parameters = Parameters;
LPVOID outBuffer = NULL; // Native parameters
LPBYTE stringLocation = NULL; // Conversion variables
DWORD bytesRequired = 0;
LPDESC nativeStructureDesc;
API_HANDLER_PARAMETERS_REFERENCE; // Avoid warnings
IF_DEBUG(FILE) {
NetpKdPrint(( "XsNetFileGetInfo2: header at %lx, "
"params at %lx, level %ld\n",
Header, parameters, SmbGetUshort( &parameters->Level ) ));
}
try {
//
// Check errors.
//
if ( XsWordParamOutOfRange( parameters->Level, 2, 3 )) {
Header->Status = ERROR_INVALID_LEVEL;
goto cleanup;
}
//
// Make the local call.
//
status = NetFileGetInfo(
NULL,
SmbGetUlong( &parameters->FileId ),
(DWORD)SmbGetUshort( &parameters->Level ),
(LPBYTE *)&outBuffer
);
if ( !XsApiSuccess( status )) {
IF_DEBUG(API_ERRORS) {
NetpKdPrint(( "XsNetFileGetInfo2: NetFileGetInfo failed: "
"%X\n", status ));
}
Header->Status = (WORD)status;
goto cleanup;
}
//
// Use the requested level to determine the format of the
// data structure.
//
switch ( SmbGetUshort( &parameters->Level ) ) {
case 2:
StructureDesc = Desc16_file_info_2;
nativeStructureDesc = Desc32_file_info_2;
break;
case 3:
StructureDesc = Desc16_file_info_3;
nativeStructureDesc = Desc32_file_info_3;
break;
}
//
// Convert the structure returned by the 32-bit call to a 16-bit
// structure. The last possible location for variable data is
// calculated from buffer location and length.
//
stringLocation = (LPBYTE)( XsSmbGetPointer( &parameters->Buffer )
+ SmbGetUshort( &parameters->BufLen ) );
status = RapConvertSingleEntry(
outBuffer,
nativeStructureDesc,
FALSE,
(LPBYTE)XsSmbGetPointer( &parameters->Buffer ),
(LPBYTE)XsSmbGetPointer( &parameters->Buffer ),
StructureDesc,
TRUE,
&stringLocation,
&bytesRequired,
Response,
NativeToRap
);
if ( status != NERR_Success ) {
IF_DEBUG(ERRORS) {
NetpKdPrint(( "XsFileGetInfo2: RapConvertSingleEntry failed: "
"%X\n", status ));
}
Header->Status = NERR_InternalError;
goto cleanup;
}
IF_DEBUG(FILE) {
NetpKdPrint(( "32-bit data at %lx, 16-bit data at %lx, %ld BR\n",
outBuffer, SmbGetUlong( &parameters->Buffer ),
bytesRequired ));
}
//
// Determine return code based on the size of the buffer.
//
if ( !XsCheckBufferSize(
SmbGetUshort( &parameters->BufLen ),
StructureDesc,
FALSE // not in native format
)) {
IF_DEBUG(ERRORS) {
NetpKdPrint(( "XsNetFileGetInfo2: Buffer too small.\n" ));
}
Header->Status = NERR_BufTooSmall;
} else {
if ( bytesRequired > (DWORD)SmbGetUshort( &parameters-> BufLen )) {
IF_DEBUG(ERRORS) {
NetpKdPrint(( "NetFileGetInfo2: More data available.\n" ));
}
Header->Status = ERROR_MORE_DATA;
} else {
//
// Pack the response data.
//
Header->Converter = XsPackReturnData(
(LPVOID)XsSmbGetPointer( &parameters->Buffer ),
SmbGetUshort( &parameters->BufLen ),
StructureDesc,
1
);
}
}
//
// Set up the response parameters.
//
SmbPutUshort( &parameters->TotalAvail, (WORD)bytesRequired );
cleanup:
;
} except( EXCEPTION_EXECUTE_HANDLER ) {
Header->Status = (WORD)RtlNtStatusToDosError( GetExceptionCode() );
}
NetApiBufferFree( outBuffer );
//
// Determine return buffer size.
//
XsSetDataCount(
&parameters->BufLen,
StructureDesc,
Header->Converter,
1,
Header->Status
);
return STATUS_SUCCESS;
} // XsNetFileGetInfo2
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