OpenWrt – Rev 4
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/*
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h> /* for unlink() */
#include <libgen.h>
#include <getopt.h> /* for getopt() */
#include <stdarg.h>
#include <errno.h>
#include <sys/stat.h>
#include "sha1.h"
#if (__BYTE_ORDER == __BIG_ENDIAN)
# define HOST_TO_BE32(x) (x)
# define BE32_TO_HOST(x) (x)
#else
# define HOST_TO_BE32(x) bswap_32(x)
# define BE32_TO_HOST(x) bswap_32(x)
#endif
struct planex_hdr {
uint8_t sha1sum[20];
char version[8];
uint8_t unk1[2];
uint32_t datalen;
} __attribute__ ((packed));
struct board_info {
char *id;
uint32_t seed;
uint8_t unk[2];
uint32_t datalen;
};
/*
* Globals
*/
static char *ifname;
static char *progname;
static char *ofname;
static char *version = "1.00.00";
static char *board_id;
static struct board_info *board;
static struct board_info boards[] = {
{
.id = "MZK-W04NU",
.seed = 2,
.unk = {0x04, 0x08},
.datalen = 0x770000,
}, {
.id = "MZK-W300NH",
.seed = 4,
.unk = {0x00, 0x00},
.datalen = 0x770000,
}, {
/* terminating entry */
}
};
/*
* Message macros
*/
#define ERR(fmt, ...) do { \
fflush(0); \
fprintf(stderr, "[%s] *** error: " fmt "\n", \
progname, ## __VA_ARGS__ ); \
} while (0)
#define ERRS(fmt, ...) do { \
int save = errno; \
fflush(0); \
fprintf(stderr, "[%s] *** error: " fmt ": %s\n", \
progname, ## __VA_ARGS__, strerror(save)); \
} while (0)
static struct board_info *find_board(char *id)
{
struct board_info *ret;
struct board_info *board;
ret = NULL;
for (board = boards; board->id != NULL; board++){
if (strcasecmp(id, board->id) == 0) {
ret = board;
break;
}
};
return ret;
}
void usage(int status)
{
FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
struct board_info *board;
fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
fprintf(stream,
"\n"
"Options:\n"
" -B <board> create image for the board specified with <board>\n"
" -i <file> read input from the file <file>\n"
" -o <file> write output to the file <file>\n"
" -v <version> set image version to <version>\n"
" -h show this screen\n"
);
exit(status);
}
int main(int argc, char *argv[])
{
int res = EXIT_FAILURE;
int buflen;
int err;
struct stat st;
char *buf;
struct planex_hdr *hdr;
sha1_context ctx;
uint32_t seed;
FILE *outfile, *infile;
progname = basename(argv[0]);
while ( 1 ) {
int c;
c = getopt(argc, argv, "B:i:o:v:h");
if (c == -1)
break;
switch (c) {
case 'B':
board_id = optarg;
break;
case 'i':
ifname = optarg;
break;
case 'o':
ofname = optarg;
break;
case 'v':
version = optarg;
break;
case 'h':
usage(EXIT_SUCCESS);
break;
default:
usage(EXIT_FAILURE);
break;
}
}
if (board_id == NULL) {
ERR("no board specified");
goto err;
}
board = find_board(board_id);
if (board == NULL) {
ERR("unknown board '%s'", board_id);
goto err;
};
if (ifname == NULL) {
ERR("no input file specified");
goto err;
}
if (ofname == NULL) {
ERR("no output file specified");
goto err;
}
err = stat(ifname, &st);
if (err){
ERRS("stat failed on %s", ifname);
goto err;
}
if (st.st_size > board->datalen) {
ERR("file '%s' is too big - max size: 0x%08X (exceeds %lu bytes)\n",
ifname, board->datalen, st.st_size - board->datalen);
goto err;
}
buflen = board->datalen + 0x10000;
buf = malloc(buflen);
if (!buf) {
ERR("no memory for buffer\n");
goto err;
}
memset(buf, 0xff, buflen);
hdr = (struct planex_hdr *)buf;
hdr->datalen = HOST_TO_BE32(board->datalen);
hdr->unk1[0] = board->unk[0];
hdr->unk1[1] = board->unk[1];
snprintf(hdr->version, sizeof(hdr->version), "%s", version);
infile = fopen(ifname, "r");
if (infile == NULL) {
ERRS("could not open \"%s\" for reading", ifname);
goto err_free;
}
errno = 0;
fread(buf + sizeof(*hdr), st.st_size, 1, infile);
if (errno != 0) {
ERRS("unable to read from file %s", ifname);
goto err_close_in;
}
seed = HOST_TO_BE32(board->seed);
sha1_starts(&ctx);
sha1_update(&ctx, (uchar *) &seed, sizeof(seed));
sha1_update(&ctx, buf + sizeof(*hdr), board->datalen);
sha1_finish(&ctx, hdr->sha1sum);
outfile = fopen(ofname, "w");
if (outfile == NULL) {
ERRS("could not open \"%s\" for writing", ofname);
goto err_close_in;
}
errno = 0;
fwrite(buf, buflen, 1, outfile);
if (errno) {
ERRS("unable to write to file %s", ofname);
goto err_close_out;
}
res = EXIT_SUCCESS;
out_flush:
fflush(outfile);
err_close_out:
fclose(outfile);
if (res != EXIT_SUCCESS) {
unlink(ofname);
}
err_close_in:
fclose(infile);
err_free:
free(buf);
err:
return res;
}