1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
// distribution boxbackup-0.10 (svn version: 494)
//
// Copyright (c) 2003 - 2006
// Ben Summers and contributors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. All use of this software and associated advertising materials must
// display the following acknowledgment:
// This product includes software developed by Ben Summers.
// 4. The names of the Authors may not be used to endorse or promote
// products derived from this software without specific prior written
// permission.
//
// [Where legally impermissible the Authors do not disclaim liability for
// direct physical injury or death caused solely by defects in the software
// unless it is modified by a third party.]
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//
//
// --------------------------------------------------------------------------
//
// File
// Name: BackupStoreFileWire.h
// Purpose: On the wire / disc formats for backup store files
// Created: 12/1/04
//
// --------------------------------------------------------------------------
#ifndef BACKUPSTOREFILEWIRE__H
#define BACKUPSTOREFILEWIRE__H
#include "MD5Digest.h"
// set packing to one byte
#ifdef STRUCTURE_PACKING_FOR_WIRE_USE_HEADERS
#include "BeginStructPackForWire.h"
#else
BEGIN_STRUCTURE_PACKING_FOR_WIRE
#endif
typedef struct
{
int32_t mMagicValue; // also the version number
int64_t mNumBlocks; // number of blocks contained in the file
int64_t mContainerID;
int64_t mModificationTime;
int32_t mMaxBlockClearSize; // Maximum clear size that can be expected for a block
int32_t mOptions; // bitmask of options used
// Then a BackupStoreFilename
// Then a BackupClientFileAttributes
} file_StreamFormat;
typedef struct
{
int32_t mMagicValue; // different magic value
int64_t mOtherFileID; // the file ID of the 'other' file which may be referenced by the index
uint64_t mEntryIVBase; // base value for block IV
int64_t mNumBlocks; // repeat of value in file header
} file_BlockIndexHeader;
typedef struct
{
int32_t mSize; // size in clear
uint32_t mWeakChecksum; // weak, rolling checksum
uint8_t mStrongChecksum[MD5Digest::DigestLength]; // strong digest based checksum
} file_BlockIndexEntryEnc;
typedef struct
{
union
{
int64_t mEncodedSize; // size encoded, if > 0
int64_t mOtherBlockIndex; // 0 - block number in other file, if <= 0
};
uint8_t mEnEnc[sizeof(file_BlockIndexEntryEnc)]; // Encoded section
} file_BlockIndexEntry;
// Use default packing
#ifdef STRUCTURE_PACKING_FOR_WIRE_USE_HEADERS
#include "EndStructPackForWire.h"
#else
END_STRUCTURE_PACKING_FOR_WIRE
#endif
// header for blocks of compressed data in files
#define HEADER_CHUNK_IS_COMPRESSED 1 // bit
#define HEADER_ENCODING_SHIFT 1 // shift value
#define HEADER_BLOWFISH_ENCODING 1 // value stored in bits 1 -- 7
#define HEADER_AES_ENCODING 2 // value stored in bits 1 -- 7
#endif // BACKUPSTOREFILEWIRE__H
|
