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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MAR_PRIVATE_H__
#define MAR_PRIVATE_H__
#include <assert.h> // for C11 static_assert
#include "limits.h"
#include <stdint.h>
#define BLOCKSIZE 4096
#define ROUND_UP(n, incr) (((n) / (incr) + 1) * (incr))
#define MAR_ID "MAR1"
#define MAR_ID_SIZE 4
/* The signature block comes directly after the header block
which is 16 bytes */
#define SIGNATURE_BLOCK_OFFSET 16
/* Make sure the file is less than 500MB. We do this to protect against
invalid MAR files. */
#define MAX_SIZE_OF_MAR_FILE ((int64_t)524288000)
/* Existing code makes assumptions that the file size is
smaller than LONG_MAX. */
static_assert(MAX_SIZE_OF_MAR_FILE < ((int64_t)LONG_MAX),
"max mar file size is too big");
/* We store at most the size up to the signature block + 4
bytes per BLOCKSIZE bytes */
static_assert(sizeof(BLOCKSIZE) < (SIGNATURE_BLOCK_OFFSET + sizeof(uint32_t)),
"BLOCKSIZE is too big");
/* The maximum size of any signature supported by current and future
implementations of the signmar program. */
#define MAX_SIGNATURE_LENGTH 2048
/* Each additional block has a unique ID.
The product information block has an ID of 1. */
#define PRODUCT_INFO_BLOCK_ID 1
#define MAR_ITEM_SIZE(namelen) (3 * sizeof(uint32_t) + (namelen) + 1)
/* Product Information Block (PIB) constants */
#define PIB_MAX_MAR_CHANNEL_ID_SIZE 63
#define PIB_MAX_PRODUCT_VERSION_SIZE 31
/* The mar program is compiled as a host bin so we don't have access to NSPR at
runtime. For that reason we use ntohl, htonl, and define HOST_TO_NETWORK64
instead of the NSPR equivalents. */
#ifdef XP_WIN
# include <winsock2.h>
/* Include stdio.h before redefining ftello and fseeko to avoid clobbering
* the ftello() and fseeko() function declarations in MinGW's stdio.h. */
# include <stdio.h>
# define ftello _ftelli64
# define fseeko _fseeki64
#else
# define _FILE_OFFSET_BITS 64
# include <netinet/in.h>
# include <unistd.h>
# include <stdio.h>
#endif
#define HOST_TO_NETWORK64(x) \
(((((uint64_t)x) & 0xFF) << 56) | ((((uint64_t)x) >> 8) & 0xFF) << 48) | \
(((((uint64_t)x) >> 16) & 0xFF) << 40) | \
(((((uint64_t)x) >> 24) & 0xFF) << 32) | \
(((((uint64_t)x) >> 32) & 0xFF) << 24) | \
(((((uint64_t)x) >> 40) & 0xFF) << 16) | \
(((((uint64_t)x) >> 48) & 0xFF) << 8) | (((uint64_t)x) >> 56)
#define NETWORK_TO_HOST64 HOST_TO_NETWORK64
#endif /* MAR_PRIVATE_H__ */
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