150 lines
7.6 KiB
C
150 lines
7.6 KiB
C
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/*++
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Copyright (c) Microsoft Corporation. All rights reserved.
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Module Name:
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rtinfo.h
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Abstract:
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Definitions of information block structuers used to exchange
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information in router API
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--*/
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#ifndef __ROUTING_RTINFO_H__
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#define __ROUTING_RTINFO_H__
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#if _MSC_VER > 1000
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#pragma once
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#endif
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//////////////////////////////////////////////////////////////////////////////
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// //
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// Information is passed to and from the Router Managers using a set of //
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// RTR_TOC_ENTRY structures. These structures are encapsulated by an //
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// RTR_INFO_BLOCK_HEADER. //
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// The general structure of this is: //
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// //
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// --- |-----------------------| --- //
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// | | | | //
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// | | RTR_INFO_BLOCK_HEADER | | //
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// | | | | //
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// | | TocEntriesCount = N | | //
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// | |-----------------------| | //
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// | | TocEntry[0] | | //
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// | | | | //
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// | | Offset of | | //
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// |<------ Associated Data | | //
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// | | | | //
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// | |-----------------------| | //
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// | Z Z | //
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// | | | | //
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// | |-----------------------| | //
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// | | TocEntry[N-1] | | //
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// | | | | //
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// | | Offset of | | //
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// | | Associated Data ------->| //
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// | | | | //
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// --- |-----------------------| | //
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// | Data for TocEntry[0] | | //
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// |-----------------------| | //
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// Z Z | //
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// |-----------------------| --- //
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// | Data for TocEntry[N-1]| //
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// |-----------------------| //
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// //
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// //
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// Each of the blocks of data must begin at a quadword aligned boundary. To //
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// get QUADWORD alignment, use the following macros. //
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// //
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// The block of data pointed to by an InfoBlock MUST be aligned. //
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// Use the alignment macro when writing the data portion into an infobase. //
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// This implies that for each ALIGN_POINTER operation done on a chunk //
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// of memory, the requested allocation must be ALIGN_SIZE greater //
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// than what is actually required (to be on the safe side) //
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// //
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//////////////////////////////////////////////////////////////////////////////
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#define ALIGN_SIZE 0x00000008
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#define ALIGN_SHIFT (ALIGN_SIZE - 0x00000001) // 0x00000007
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#define ALIGN_MASK_POINTER (~(UINT_PTR)ALIGN_SHIFT) // 0xfffffff8
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#define ALIGN_MASK_LENGTH (~ALIGN_SHIFT) // 0xfffffff8
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#define ALIGN_MASK (~ALIGN_SHIFT) // 0xfffffff8
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#define ALIGN_POINTER(ptr) { \
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(ptr) = (PVOID)((DWORD_PTR)(ptr) + ALIGN_SHIFT); \
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(ptr) = (PVOID)((DWORD_PTR)(ptr) & ALIGN_MASK_POINTER); \
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}
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#define ALIGN_LENGTH(length) { \
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(length) = (DWORD)((length) + ALIGN_SHIFT); \
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(length) = (DWORD)((length) & ALIGN_MASK_LENGTH); \
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}
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#define IS_ALIGNED(ptr) (((UINT_PTR)(ptr) & ALIGN_SHIFT) == 0x00000000)
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//////////////////////////////////////////////////////////////////////////////
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// //
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// Table of Contents Entry //
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// //
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// //
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// Each entry describes a structure type, location within the information //
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// block and number of entries of the same type. //
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// //
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//////////////////////////////////////////////////////////////////////////////
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typedef struct _RTR_TOC_ENTRY
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{
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ULONG InfoType; // Info structure type
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ULONG InfoSize; // Size of the info structure
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ULONG Count; // How many info structures of this type
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ULONG Offset; // Offset of the first structure, from the start
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// of the info block header.
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}RTR_TOC_ENTRY, *PRTR_TOC_ENTRY;
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//////////////////////////////////////////////////////////////////////////////
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// //
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// Info Block Header //
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// //
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// //
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// All Router information blocks start with this header //
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// //
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//////////////////////////////////////////////////////////////////////////////
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#define RTR_INFO_BLOCK_VERSION 1
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typedef struct _RTR_INFO_BLOCK_HEADER
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{
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ULONG Version; // Version of the structure
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ULONG Size; // size of the whole block, including version
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ULONG TocEntriesCount;// Number of entries
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RTR_TOC_ENTRY TocEntry[1]; // Table of content followed by the actual
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// information blocks
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} RTR_INFO_BLOCK_HEADER, *PRTR_INFO_BLOCK_HEADER;
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//
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// PVOID
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// GetInfoFromTocEntry(
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// IN PRTR_INFO_BLOCK_HEADER pInfoHdr,
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// IN PRTR_TOC_ENTRY pToc
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// )
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//
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#define GetInfoFromTocEntry(hdr,toc) \
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(((toc)->Offset < (hdr)->Size) ? ((PVOID)(((PBYTE)(hdr)) + (toc)->Offset)) : NULL)
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#endif //__ROUTING_RTINFO_H__
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