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/*
* mkdlinkfw
*
* Copyright (C) 2018 Paweł Dembicki <paweldembicki@gmail.com>
*
* This tool is based on mktplinkfw.
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008,2009 Wang Jian <lark@linux.net.cn>
*
* 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.
*/
#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 <stdbool.h>
#include <endian.h>
#include <errno.h>
#include <time.h>
#include <sys/stat.h>
#include <zlib.h> /*for crc32 */
#include "mkdlinkfw-lib.h"
extern char *progname;
uint32_t jboot_timestamp(void)
{
char *env = getenv("SOURCE_DATE_EPOCH");
char *endptr = env;
time_t fixed_timestamp = -1;
errno = 0;
if (env && *env) {
fixed_timestamp = strtoull(env, &endptr, 10);
if (errno || (endptr && *endptr != '\0')) {
fprintf(stderr, "Invalid SOURCE_DATE_EPOCH");
fixed_timestamp = -1;
}
}
if (fixed_timestamp == -1)
time(&fixed_timestamp);
return (((uint32_t) fixed_timestamp) - TIMESTAMP_MAGIC) >> 2;
}
uint16_t jboot_checksum(uint16_t start_val, uint16_t *data, int size)
{
uint32_t counter = start_val;
uint16_t *ptr = data;
while (size > 1) {
counter += *ptr;
++ptr;
while (counter >> 16)
counter = (uint16_t) counter + (counter >> 16);
size -= 2;
}
if (size > 0) {
counter += *(uint8_t *) ptr;
counter -= 0xFF;
}
while (counter >> 16)
counter = (uint16_t) counter + (counter >> 16);
return counter;
}
int get_file_stat(struct file_info *fdata)
{
struct stat st;
int res;
if (fdata->file_name == NULL)
return 0;
res = stat(fdata->file_name, &st);
if (res) {
ERRS("stat failed on %s", fdata->file_name);
return res;
}
fdata->file_size = st.st_size;
return 0;
}
int read_to_buf(const struct file_info *fdata, char *buf)
{
FILE *f;
int ret = EXIT_FAILURE;
size_t read;
f = fopen(fdata->file_name, "r");
if (f == NULL) {
ERRS("could not open \"%s\" for reading", fdata->file_name);
goto out;
}
read = fread(buf, fdata->file_size, 1, f);
if (ferror(f) || read != 1) {
ERRS("unable to read from file \"%s\"", fdata->file_name);
goto out_close;
}
ret = EXIT_SUCCESS;
out_close:
fclose(f);
out:
return ret;
}
int write_fw(const char *ofname, const char *data, int len)
{
FILE *f;
int ret = EXIT_FAILURE;
f = fopen(ofname, "w");
if (f == NULL) {
ERRS("could not open \"%s\" for writing", ofname);
goto out;
}
errno = 0;
fwrite(data, len, 1, f);
if (errno) {
ERRS("unable to write output file");
goto out_flush;
}
DBG("firmware file \"%s\" completed", ofname);
ret = EXIT_SUCCESS;
out_flush:
fflush(f);
fclose(f);
if (ret != EXIT_SUCCESS)
unlink(ofname);
out:
return ret;
}
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