It is not used anymore. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> SVN-Revision: 38663master
parent
04fdff9dc0
commit
d9c9633d19
@ -1,150 +0,0 @@ |
|||||||
/*
|
|
||||||
* wndr3700.c - partially based on OpenWrt's add_header.c |
|
||||||
* |
|
||||||
* Copyright (C) 2009 Anael Orlinski <naouel@naouel.org> |
|
||||||
* |
|
||||||
* This program is free software; you can redistribute it and/or |
|
||||||
* modify it under the terms of the GNU General Public License, |
|
||||||
* version 2 as published by the Free Software Foundation. |
|
||||||
* |
|
||||||
* 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. |
|
||||||
*/ |
|
||||||
|
|
||||||
/*
|
|
||||||
* The add_header utility used by various vendors preprends the buf |
|
||||||
* image with a header containing a CRC32 value which is generated for the |
|
||||||
* model id + reserved space for CRC32 + buf, then replaces the reserved |
|
||||||
* area with the actual CRC32. This replacement tool mimics this behavior. |
|
||||||
*/ |
|
||||||
|
|
||||||
#include <stdio.h> |
|
||||||
#include <stdlib.h> |
|
||||||
#include <stddef.h> |
|
||||||
#include <unistd.h> |
|
||||||
#include <errno.h> |
|
||||||
#include <fcntl.h> |
|
||||||
#include <sys/mman.h> |
|
||||||
#include <string.h> |
|
||||||
#include <netinet/in.h> |
|
||||||
#include <inttypes.h> |
|
||||||
|
|
||||||
#define BPB 8 /* bits/byte */ |
|
||||||
|
|
||||||
#define WNDR3700_MAGIC_LEN 4 |
|
||||||
|
|
||||||
static uint32_t crc32[1<<BPB]; |
|
||||||
static char *magic = "3700"; |
|
||||||
|
|
||||||
static void init_crc32() |
|
||||||
{ |
|
||||||
const uint32_t poly = ntohl(0x2083b8ed); |
|
||||||
int n; |
|
||||||
|
|
||||||
for (n = 0; n < 1<<BPB; n++) { |
|
||||||
uint32_t crc = n; |
|
||||||
int bit; |
|
||||||
|
|
||||||
for (bit = 0; bit < BPB; bit++) |
|
||||||
crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1); |
|
||||||
crc32[n] = crc; |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
static uint32_t crc32buf(unsigned char *buf, size_t len) |
|
||||||
{ |
|
||||||
uint32_t crc = 0xFFFFFFFF; |
|
||||||
|
|
||||||
for (; len; len--, buf++) |
|
||||||
crc = crc32[(uint8_t)crc ^ *buf] ^ (crc >> BPB); |
|
||||||
return ~crc; |
|
||||||
} |
|
||||||
|
|
||||||
struct header { |
|
||||||
unsigned char magic[WNDR3700_MAGIC_LEN]; |
|
||||||
uint32_t crc; |
|
||||||
unsigned char stuff[56]; |
|
||||||
}; |
|
||||||
|
|
||||||
static void usage(const char *) __attribute__ (( __noreturn__ )); |
|
||||||
|
|
||||||
static void usage(const char *mess) |
|
||||||
{ |
|
||||||
fprintf(stderr, "Error: %s\n", mess); |
|
||||||
fprintf(stderr, "Usage: wndr3700 input_file output_file [magic]\n"); |
|
||||||
fprintf(stderr, "\n"); |
|
||||||
exit(1); |
|
||||||
} |
|
||||||
|
|
||||||
int main(int argc, char **argv) |
|
||||||
{ |
|
||||||
off_t len; // of original buf
|
|
||||||
off_t buflen; // of the output file
|
|
||||||
int fd; |
|
||||||
void *input_file; // pointer to the input file (mmmapped)
|
|
||||||
struct header header; |
|
||||||
unsigned char *buf; // pointer to prefix + copy of original buf
|
|
||||||
|
|
||||||
// verify parameters
|
|
||||||
|
|
||||||
if (argc < 3) |
|
||||||
usage("wrong number of arguments"); |
|
||||||
|
|
||||||
if (argc > 3) |
|
||||||
magic = argv[3]; |
|
||||||
|
|
||||||
if (strlen(magic) != WNDR3700_MAGIC_LEN) { |
|
||||||
fprintf(stderr, "Invalid magic: '%s'\n", magic); |
|
||||||
exit(1); |
|
||||||
} |
|
||||||
|
|
||||||
// mmap input_file
|
|
||||||
if ((fd = open(argv[1], O_RDONLY)) < 0 |
|
||||||
|| (len = lseek(fd, 0, SEEK_END)) < 0 |
|
||||||
|| (input_file = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0)) == (void *) (-1) |
|
||||||
|| close(fd) < 0) |
|
||||||
{ |
|
||||||
fprintf(stderr, "Error loading file %s: %s\n", argv[1], strerror(errno)); |
|
||||||
exit(1); |
|
||||||
} |
|
||||||
|
|
||||||
buflen = len; |
|
||||||
|
|
||||||
init_crc32(); |
|
||||||
|
|
||||||
// preload header
|
|
||||||
memcpy(&header, input_file, sizeof(header)); |
|
||||||
|
|
||||||
memcpy(header.magic, magic, WNDR3700_MAGIC_LEN); |
|
||||||
header.crc = 0; |
|
||||||
|
|
||||||
// create a firmware image in memory and copy the input_file to it
|
|
||||||
buf = malloc(buflen); |
|
||||||
memcpy(buf, input_file, len); |
|
||||||
|
|
||||||
// CRC of temporary header
|
|
||||||
header.crc = htonl(crc32buf((unsigned char*)&header, sizeof(header))); |
|
||||||
|
|
||||||
memcpy(buf, &header, sizeof(header)); |
|
||||||
|
|
||||||
// write the buf
|
|
||||||
if ((fd = open(argv[2], O_CREAT|O_WRONLY|O_TRUNC,0644)) < 0 |
|
||||||
|| write(fd, buf, buflen) != buflen |
|
||||||
|| close(fd) < 0) |
|
||||||
{ |
|
||||||
fprintf(stderr, "Error storing file %s: %s\n", argv[2], strerror(errno)); |
|
||||||
exit(2); |
|
||||||
} |
|
||||||
|
|
||||||
free(buf); |
|
||||||
|
|
||||||
munmap(input_file,len); |
|
||||||
|
|
||||||
return 0; |
|
||||||
} |
|
Loading…
Reference in new issue