197 lines
4.8 KiB
C
197 lines
4.8 KiB
C
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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AuxData.c
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Abstract:
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This module contains Remote Admin Protocol (RAP) routines. These routines
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are shared between XactSrv and RpcXlate.
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Author:
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Shanku Niyogi (w-shanku) 15-Mar-1991
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Environment:
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Portable to any flat, 32-bit environment. (Uses Win32 typedefs.)
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Requires ANSI C extensions: slash-slash comments, long external names.
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Revision History:
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08-Apr-1991 JohnRo
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Added assertion checking.
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14-Apr-1991 JohnRo
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Reduce recompiles.
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15-May-1991 JohnRo
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Added native vs. RAP handling.
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10-Jul-1991 JohnRo
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RapExamineDescriptor() has yet another parameter.
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20-Sep-1991 JohnRo
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Downlevel NetService APIs. (Handle REM_DATA_BLOCK correctly.)
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--*/
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// These must be included first:
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#include <windef.h> // IN, LPDWORD, NULL, OPTIONAL, DWORD, etc.
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#include <lmcons.h> // NET_API_STATUS
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// These may be included in any order:
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#include <align.h> // ALIGN_WORD, etc.
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#include <netdebug.h> // NetpAssert().
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#include <rap.h> // My prototypes, LPDESC, NO_AUX_DATA, etc.
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#include <remtypes.h> // REM_WORD, etc.
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#include <smbgtpt.h> // SmbPutUshort(), etc.
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#include <string.h> // strchr().
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DWORD
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RapAuxDataCountOffset (
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IN LPDESC Descriptor,
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IN RAP_TRANSMISSION_MODE TransmissionMode,
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IN BOOL Native
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)
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/*++
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Routine Description:
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This routine determines the offset from the start of the structure of
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the auxiliary data count ( described by REM_AUX_NUM or REM_AUX_NUM_DWORD
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descriptor characters ).
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Arguments:
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Descriptor - the format of the structure.
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Transmission Mode - Indicates whether this array is part of a response,
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a request, or both.
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Native - TRUE iff the descriptor defines a native structure. (This flag is
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used to decide whether or not to align fields.)
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Return Value:
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DWORD - The offset, in bytes, from the start of the structure to the
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count data, or the value NO_AUX_DATA.
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--*/
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{
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DWORD auxDataCountOffset;
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NetpAssert(Descriptor != NULL);
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NetpAssert(*Descriptor != '\0');
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if (Descriptor[0] != REM_DATA_BLOCK) {
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//
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// Regular structure/whatever.
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//
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RapExamineDescriptor(
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Descriptor,
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NULL,
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NULL,
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NULL,
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&auxDataCountOffset,
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NULL,
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NULL, // don't need to know structure alignment
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TransmissionMode,
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Native
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);
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} else {
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//
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// REM_DATA_BLOCK: Unstructured data.
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//
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NetpAssert( Descriptor[1] == '\0' );
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auxDataCountOffset = NO_AUX_DATA;
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}
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return auxDataCountOffset;
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} // RapAuxDataCountOffset
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DWORD
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RapAuxDataCount (
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IN LPBYTE Buffer,
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IN LPDESC Descriptor,
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IN RAP_TRANSMISSION_MODE TransmissionMode,
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IN BOOL Native
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)
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/*++
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Routine Description:
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This routine determines the actual count of the number of auxiliary
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structures, taking into consideration whether the count is a 16-bit
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or a 32-bit quantity.
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Arguments:
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Buffer - a pointer to the start of the data buffer.
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Descriptor - the format of the structure.
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Transmission Mode - Indicates whether this array is part of a response,
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a request, or both.
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Native - TRUE iff the descriptor defines a native structure. (This flag is
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used to decide whether or not to align fields.)
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Return Value:
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DWORD - The number of auxiliary data structures, or the value NO_AUX_DATA.
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--*/
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{
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DWORD auxDataCountOffset;
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NetpAssert(Descriptor != NULL);
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NetpAssert(*Descriptor != '\0');
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auxDataCountOffset = RapAuxDataCountOffset(
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Descriptor,
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TransmissionMode,
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Native
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);
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//
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// No auxiliary data count offset found. There isn't any auxiliary data.
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//
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if ( auxDataCountOffset == NO_AUX_DATA) {
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return NO_AUX_DATA;
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}
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//
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// Check if the descriptor character was a word or dword count type.
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// Get appropriate value, and return it as a dword.
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//
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NetpAssert(sizeof(DESC_CHAR) == sizeof(char));
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NetpAssert(RapPossiblyAlignCount(
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auxDataCountOffset, ALIGN_WORD, Native) == auxDataCountOffset );
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if ( strchr( Descriptor, REM_AUX_NUM_DWORD ) != NULL ) {
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return SmbGetUlong( (LPDWORD)( Buffer + auxDataCountOffset ));
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} else {
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return (DWORD)SmbGetUshort( (LPWORD)( Buffer + auxDataCountOffset ));
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}
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} // RapAuxDataCount
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