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package/mtd: add option for fixing seama images

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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 33841
This commit is contained in:
Gabor Juhos 2012-10-18 07:22:59 +00:00
parent 25250a22ef
commit a67d5fd24f
8 changed files with 677 additions and 3 deletions
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4
package/mtd/Makefile
View file

@ -1,5 +1,5 @@
#
# Copyright (C) 2006-2010 OpenWrt.org
# Copyright (C) 2006-2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=mtd
PKG_RELEASE:=19
PKG_RELEASE:=20
PKG_BUILD_DIR := $(KERNEL_BUILD_DIR)/$(PKG_NAME)
STAMP_PREPARED := $(STAMP_PREPARED)_$(call confvar,CONFIG_MTD_REDBOOT_PARTS)

2
package/mtd/src/Makefile
View file

@ -2,10 +2,12 @@ CC = gcc
CFLAGS += -Wall
obj = mtd.o jffs2.o crc32.o
obj.seama = seama.o md5.o
obj.ar71xx = trx.o
obj.brcm = trx.o
obj.brcm47xx = $(obj.brcm)
obj.brcm63xx = imagetag.o
obj.ramips = $(obj.seama)
ifdef FIS_SUPPORT
obj += fis.o

307
package/mtd/src/md5.c Normal file
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@ -0,0 +1,307 @@
/*
***********************************************************************
** md5.c -- the source code for MD5 routines **
** RSA Data Security, Inc. MD5 Message-Digest Algorithm **
** Created: 2/17/90 RLR **
** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. **
***********************************************************************
*/
/*
***********************************************************************
** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
** **
** License to copy and use this software is granted provided that **
** it is identified as the "RSA Data Security, Inc. MD5 Message- **
** Digest Algorithm" in all material mentioning or referencing this **
** software or this function. **
** **
** License is also granted to make and use derivative works **
** provided that such works are identified as "derived from the RSA **
** Data Security, Inc. MD5 Message-Digest Algorithm" in all **
** material mentioning or referencing the derived work. **
** **
** RSA Data Security, Inc. makes no representations concerning **
** either the merchantability of this software or the suitability **
** of this software for any particular purpose. It is provided "as **
** is" without express or implied warranty of any kind. **
** **
** These notices must be retained in any copies of any part of this **
** documentation and/or software. **
***********************************************************************
*/
#include <string.h>
#include "md5.h"
/*
***********************************************************************
** Message-digest routines: **
** To form the message digest for a message M **
** (1) Initialize a context buffer mdContext using MD5_Init **
** (2) Call MD5_Update on mdContext and M **
** (3) Call MD5_Final on mdContext **
** The message digest is now in mdContext->digest[0...15] **
***********************************************************************
*/
/* forward declaration */
static void Transform ();
static unsigned char PADDING[64] = {
0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/* F, G, H and I are basic MD5 functions */
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
/* ROTATE_LEFT rotates x left n bits */
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
/* Rotation is separate from addition to prevent recomputation */
#define FF(a, b, c, d, x, s, ac) \
{(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) \
{(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) \
{(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) \
{(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#ifdef __STDC__
#define UL(x) x##U
#else
#define UL(x) x
#endif
/* The routine MD5_Init initializes the message-digest context
mdContext. All fields are set to zero.
*/
void MD5_Init (mdContext)
MD5_CTX *mdContext;
{
mdContext->i[0] = mdContext->i[1] = (UINT4)0;
/* Load magic initialization constants.
*/
mdContext->buf[0] = (UINT4)0x67452301;
mdContext->buf[1] = (UINT4)0xefcdab89;
mdContext->buf[2] = (UINT4)0x98badcfe;
mdContext->buf[3] = (UINT4)0x10325476;
}
/* The routine MD5Update updates the message-digest context to
account for the presence of each of the characters inBuf[0..inLen-1]
in the message whose digest is being computed.
*/
void MD5_Update (mdContext, inBuf, inLen)
MD5_CTX *mdContext;
unsigned char *inBuf;
unsigned int inLen;
{
UINT4 in[16];
int mdi;
unsigned int i, ii;
/* compute number of bytes mod 64 */
mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
/* update number of bits */
if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0])
mdContext->i[1]++;
mdContext->i[0] += ((UINT4)inLen << 3);
mdContext->i[1] += ((UINT4)inLen >> 29);
while (inLen--) {
/* add new character to buffer, increment mdi */
mdContext->in[mdi++] = *inBuf++;
/* transform if necessary */
if (mdi == 0x40) {
for (i = 0, ii = 0; i < 16; i++, ii += 4)
in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
(((UINT4)mdContext->in[ii+2]) << 16) |
(((UINT4)mdContext->in[ii+1]) << 8) |
((UINT4)mdContext->in[ii]);
Transform (mdContext->buf, in);
mdi = 0;
}
}
}
/* The routine MD5Final terminates the message-digest computation and
ends with the desired message digest in mdContext->digest[0...15].
*/
void MD5_Final (hash, mdContext)
unsigned char hash[];
MD5_CTX *mdContext;
{
UINT4 in[16];
int mdi;
unsigned int i, ii;
unsigned int padLen;
/* save number of bits */
in[14] = mdContext->i[0];
in[15] = mdContext->i[1];
/* compute number of bytes mod 64 */
mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
/* pad out to 56 mod 64 */
padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
MD5_Update (mdContext, PADDING, padLen);
/* append length in bits and transform */
for (i = 0, ii = 0; i < 14; i++, ii += 4)
in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
(((UINT4)mdContext->in[ii+2]) << 16) |
(((UINT4)mdContext->in[ii+1]) << 8) |
((UINT4)mdContext->in[ii]);
Transform (mdContext->buf, in);
/* store buffer in digest */
for (i = 0, ii = 0; i < 4; i++, ii += 4) {
mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
mdContext->digest[ii+1] =
(unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
mdContext->digest[ii+2] =
(unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
mdContext->digest[ii+3] =
(unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
}
memcpy(hash, mdContext->digest, 16);
}
/* Basic MD5 step. Transforms buf based on in.
*/
static void Transform (buf, in)
UINT4 *buf;
UINT4 *in;
{
UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3];
/* Round 1 */
#define S11 7
#define S12 12
#define S13 17
#define S14 22
FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
/* Round 2 */
#define S21 5
#define S22 9
#define S23 14
#define S24 20
GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */
GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
/* Round 3 */
#define S31 4
#define S32 11
#define S33 16
#define S34 23
HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */
HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
/* Round 4 */
#define S41 6
#define S42 10
#define S43 15
#define S44 21
II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
buf[0] += a;
buf[1] += b;
buf[2] += c;
buf[3] += d;
}
/*
***********************************************************************
** End of md5.c **
******************************** (cut) ********************************
*/

65
package/mtd/src/md5.h Normal file
View file

@ -0,0 +1,65 @@
/*
***********************************************************************
** md5.h -- header file for implementation of MD5 **
** RSA Data Security, Inc. MD5 Message-Digest Algorithm **
** Created: 2/17/90 RLR **
** Revised: 12/27/90 SRD,AJ,BSK,JT Reference C version **
** Revised (for MD5): RLR 4/27/91 **
** -- G modified to have y&~z instead of y&z **
** -- FF, GG, HH modified to add in last register done **
** -- Access pattern: round 2 works mod 5, round 3 works mod 3 **
** -- distinct additive constant for each step **
** -- round 4 added, working mod 7 **
***********************************************************************
*/
/*
***********************************************************************
** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
** **
** License to copy and use this software is granted provided that **
** it is identified as the "RSA Data Security, Inc. MD5 Message- **
** Digest Algorithm" in all material mentioning or referencing this **
** software or this function. **
** **
** License is also granted to make and use derivative works **
** provided that such works are identified as "derived from the RSA **
** Data Security, Inc. MD5 Message-Digest Algorithm" in all **
** material mentioning or referencing the derived work. **
** **
** RSA Data Security, Inc. makes no representations concerning **
** either the merchantability of this software or the suitability **
** of this software for any particular purpose. It is provided "as **
** is" without express or implied warranty of any kind. **
** **
** These notices must be retained in any copies of any part of this **
** documentation and/or software. **
***********************************************************************
*/
#ifndef __MD5_INCLUDE__
/* typedef a 32-bit type */
#ifdef _LP64
typedef unsigned int UINT4;
typedef int INT4;
#else
typedef unsigned long UINT4;
typedef long INT4;
#endif
#define _UINT4_T
/* Data structure for MD5 (Message-Digest) computation */
typedef struct {
UINT4 i[2]; /* number of _bits_ handled mod 2^64 */
UINT4 buf[4]; /* scratch buffer */
unsigned char in[64]; /* input buffer */
unsigned char digest[16]; /* actual digest after MD5Final call */
} MD5_CTX;
void MD5_Init ();
void MD5_Update ();
void MD5_Final ();
#define __MD5_INCLUDE__
#endif /* __MD5_INCLUDE__ */

12
package/mtd/src/mtd.c
View file

@ -137,6 +137,7 @@ image_check(int imagefd, const char *mtd)
if (trx_check) {
ret = trx_check(imagefd, mtd, buf, &buflen);
}
return ret;
}
@ -520,6 +521,10 @@ static void usage(void)
fprintf(stderr,
" fixtrx fix the checksum in a trx header on first boot\n");
}
if (mtd_fixseama) {
fprintf(stderr,
" fixseama fix the checksum in a seama header on first boot\n");
}
fprintf(stderr,
"Following options are available:\n"
" -q quiet mode (once: no [w] on writing,\n"
@ -574,6 +579,7 @@ int main (int argc, char **argv)
CMD_REFRESH,
CMD_JFFS2WRITE,
CMD_FIXTRX,
CMD_FIXSEAMA,
} cmd = -1;
erase[0] = NULL;
@ -662,6 +668,9 @@ int main (int argc, char **argv)
} else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
cmd = CMD_FIXTRX;
device = argv[1];
} else if (((strcmp(argv[0], "fixseama") == 0) && (argc == 2)) && mtd_fixseama) {
cmd = CMD_FIXSEAMA;
device = argv[1];
} else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
cmd = CMD_WRITE;
device = argv[2];
@ -738,6 +747,9 @@ int main (int argc, char **argv)
if (mtd_fixtrx) {
mtd_fixtrx(device, offset);
}
case CMD_FIXSEAMA:
if (mtd_fixseama)
mtd_fixseama(device, 0);
break;
}

1
package/mtd/src/mtd.h
View file

@ -25,4 +25,5 @@ extern void mtd_parse_jffs2data(const char *buf, const char *dir);
extern int trx_fixup(int fd, const char *name) __attribute__ ((weak));
extern int trx_check(int imagefd, const char *mtd, char *buf, int *len) __attribute__ ((weak));
extern int mtd_fixtrx(const char *mtd, size_t offset) __attribute__ ((weak));
extern int mtd_fixseama(const char *mtd, size_t offset) __attribute__ ((weak));
#endif /* __mtd_h */

179
package/mtd/src/seama.c Normal file
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@ -0,0 +1,179 @@
/*
* seama.c
*
* Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
*
* Based on the trx fixup code:
* Copyright (C) 2005 Mike Baker
* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <mtd/mtd-user.h>
#include "mtd.h"
#include "seama.h"
#include "md5.h"
#if __BYTE_ORDER == __BIG_ENDIAN
#define STORE32_LE(X) ((((X) & 0x000000FF) << 24) | (((X) & 0x0000FF00) << 8) | (((X) & 0x00FF0000) >> 8) | (((X) & 0xFF000000) >> 24))
#elif __BYTE_ORDER == __LITTLE_ENDIAN
#define STORE32_LE(X) (X)
#else
#error unknown endianness!
#endif
ssize_t pread(int fd, void *buf, size_t count, off_t offset);
ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset);
int
seama_fix_md5(char *buf, size_t len)
{
struct seama_hdr *shdr;
char *data;
size_t msize;
size_t isize;
MD5_CTX ctx;
unsigned char digest[16];
int i;
if (len < sizeof(struct seama_hdr))
return -1;
shdr = (struct seama_hdr *) buf;
if (shdr->magic != htonl(SEAMA_MAGIC)) {
fprintf(stderr, "no SEAMA header found\n");
return -1;
}
isize = ntohl(shdr->size);
msize = ntohs(shdr->metasize);
if (isize == 0) {
/* the image contains no checksum */
return -1;
}
len -= sizeof(struct seama_hdr) + sizeof(digest) + msize;
if (isize > len)
isize = len;
data = buf + sizeof(struct seama_hdr) + sizeof(digest) + msize;
MD5_Init(&ctx);
MD5_Update(&ctx, data, isize);
MD5_Final(digest, &ctx);
if (!memcmp(digest, &buf[sizeof(struct seama_hdr)], sizeof(digest))) {
if (quiet < 2)
fprintf(stderr, "the header is fixed already\n");
return -1;
}
if (quiet < 2) {
fprintf(stderr, "new size:%u, new MD5: ", isize);
for (i = 0; i < sizeof(digest); i++)
fprintf(stderr, "%02x", digest[i]);
fprintf(stderr, "\n");
}
/* update the size in the image */
shdr->size = htonl(isize);
/* update the checksum in the image */
for (i = 0; i < sizeof(digest); i++)
buf[sizeof(struct seama_hdr) + i] = digest[i];
return 0;
}
int
mtd_fixseama(const char *mtd, size_t offset)
{
int fd;
char *buf;
ssize_t res;
size_t block_offset;
if (quiet < 2)
fprintf(stderr, "Trying to fix SEAMA header in %s at 0x%x...\n",
mtd, offset);
block_offset = offset & ~(erasesize - 1);
offset -= block_offset;
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (block_offset + erasesize > mtdsize) {
fprintf(stderr, "Offset too large, device size 0x%x\n",
mtdsize);
exit(1);
}
buf = malloc(mtdsize);
if (!buf) {
perror("malloc");
exit(1);
}
res = pread(fd, buf, mtdsize, block_offset);
if (res != mtdsize) {
perror("pread");
exit(1);
}
if (seama_fix_md5(buf, mtdsize))
goto out;
if (mtd_erase_block(fd, block_offset)) {
fprintf(stderr, "Can't erease block at 0x%x (%s)\n",
block_offset, strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Rewriting block at 0x%x\n", block_offset);
if (pwrite(fd, buf, erasesize, block_offset) != erasesize) {
fprintf(stderr, "Error writing block (%s)\n", strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Done.\n");
out:
close (fd);
sync();
return 0;
}

108
package/mtd/src/seama.h Normal file
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@ -0,0 +1,108 @@
/* vi: set sw=4 ts=4: */
/*
* (SEA)ttle i(MA)ge is the image which used in project seattle.
*
* Created by David Hsieh <david_hsieh@alphanetworks.com>
* Copyright (C) 2008-2009 Alpha Networks, Inc.
*
* This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either'
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,'
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA.
*/
#ifndef __SEAMA_HEADER_FILE__
#define __SEAMA_HEADER_FILE__
#include <stdint.h>
#define SEAMA_MAGIC 0x5EA3A417
/*
* SEAMA looks like the following map.
* All the data of the header should be in network byte order.
*
* +-------------+-------------+------------
* | SEAMA magic | ^
* +-------------+-------------+ |
* | reserved | meta size | |
* +-------------+-------------+ header
* | image size (0 bytes) | |
* +-------------+-------------+ |
* ~ Meta data ~ v
* +-------------+-------------+------------
* | SEAMA magic | ^ ^
* +-------------+-------------+ | |
* | reserved | meta size | | |
* +-------------+-------------+ | |
* | image size | | |
* +-------------+-------------+ header |
* | | | |
* | 16 bytes of MD5 digest | | |
* | | | |
* | | | |
* +-------------+-------------+ | |
* ~ Meta data ~ v |
* +-------------+-------------+------- |
* | | |
* | Image of the 1st entity | |
* ~ ~ 1st entity
* | | |
* | | v
* +-------------+-------------+-------------
* | SEAMA magic | ^ ^
* +-------------+-------------+ | |
* | reserved | meta size | | |
* +-------------+-------------+ | |
* | image size | | |
* +-------------+-------------+ header |
* | | | |
* | 16 bytes of MD5 digest | | |
* | | | |
* | | | |
* +-------------+-------------+ | |
* ~ Meta data ~ v |
* +-------------+-------------+------- |
* | | |
* | Image of the 2nd entity | |
* ~ ~ 2nd entity
* | | |
* | | v
* +-------------+-------------+-------------
*/
/*
* SEAMA header
*
* |<-------- 32 bits -------->|
* +-------------+-------------+
* | SEAMA magic |
* +-------------+-------------+
* | reserved | meta size |
* +-------------+-------------+
* | image size |
* +-------------+-------------+
*/
/* seama header */
typedef struct seama_hdr seamahdr_t;
struct seama_hdr
{
uint32_t magic; /* should always be SEAMA_MAGIC. */
uint16_t reserved; /* reserved for */
uint16_t metasize; /* size of the META data */
uint32_t size; /* size of the image */
} __attribute__ ((packed));
#endif