firmware-utils: mkwrggimg: new tool for D-Link DAP-2695
Based on mkwrgimg.c. Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be> Acked-by: John Crispin <john@phrozen.org>v19.07.3_mercusys_ac12_duma
Stijn Tintel
8 years ago
parent
a35f9bbc43
commit
55eb6ed061
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/*
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* Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2016 Stijn Tintel <stijn@linux-ipv6.be>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <libgen.h>
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#include <getopt.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include "md5.h"
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#define ERR(fmt, ...) do { \
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fflush(0); \
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fprintf(stderr, "[%s] *** error: " fmt "\n", \
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progname, ## __VA_ARGS__ ); \
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} while (0)
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#define ERRS(fmt, ...) do { \
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int save = errno; \
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fflush(0); \
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fprintf(stderr, "[%s] *** error: " fmt ", %s\n", \
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progname, ## __VA_ARGS__, strerror(save)); \
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} while (0)
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#define WRGG03_MAGIC 0x20080321
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struct wrgg03_header {
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char signature[32];
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uint32_t magic1;
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uint32_t magic2;
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char version[16];
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char model[16];
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uint32_t flag[2];
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uint32_t reserve[2];
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char buildno[16];
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uint32_t size;
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uint32_t offset;
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char devname[32];
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char digest[16];
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} __attribute__ ((packed));
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static char *progname;
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static char *ifname;
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static char *ofname;
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static char *signature;
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static char *version;
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static char *model;
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static uint32_t flag = 0;
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static uint32_t reserve = 0;
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static char *buildno;
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static uint32_t offset;
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static char *devname;
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static int big_endian;
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void usage(int status)
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{
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FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
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fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
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fprintf(stream,
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"\n"
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"Options:\n"
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" -b create image in big endian format\n"
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" -B <buildno> build number\n"
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" -i <file> read input from the file <file>\n"
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" -d <name> set device name to <name>\n"
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" -m <model> model name\n"
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" -o <file> write output to the file <file>\n"
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" -O <offset> set offset to <offset>\n"
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" -s <sig> set image signature to <sig>\n"
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" -h show this screen\n"
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);
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exit(status);
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}
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static void put_u32(void *data, uint32_t val, int swap)
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{
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unsigned char *p = data;
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if (swap) {
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p[0] = (val >> 24) & 0xff;
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p[1] = (val >> 16) & 0xff;
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p[2] = (val >> 8) & 0xff;
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p[3] = val & 0xff;
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} else {
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p[3] = (val >> 24) & 0xff;
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p[2] = (val >> 16) & 0xff;
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p[1] = (val >> 8) & 0xff;
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p[0] = val & 0xff;
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}
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}
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static void get_digest(struct wrgg03_header *header, char *data, int size)
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{
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MD5_CTX ctx;
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MD5_Init(&ctx);
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MD5_Update(&ctx, (char *)&header->offset, sizeof(header->offset));
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MD5_Update(&ctx, (char *)&header->devname, sizeof(header->devname));
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MD5_Update(&ctx, data, size);
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MD5_Final(header->digest, &ctx);
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}
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int main(int argc, char *argv[])
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{
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struct wrgg03_header *header;
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char *buf;
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struct stat st;
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int buflen;
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int err;
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int res = EXIT_FAILURE;
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FILE *outfile, *infile;
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progname = basename(argv[0]);
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while ( 1 ) {
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int c;
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c = getopt(argc, argv, "bd:i:m:o:s:v:B:O:h");
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if (c == -1)
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break;
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switch (c) {
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case 'b':
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big_endian = 1;
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break;
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case 'B':
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buildno = optarg;
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break;
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case 'd':
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devname = optarg;
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break;
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case 'i':
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ifname = optarg;
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break;
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case 'm':
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model = optarg;
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break;
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case 'o':
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ofname = optarg;
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break;
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case 's':
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signature = optarg;
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break;
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case 'v':
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version = optarg;
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break;
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case 'O':
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offset = strtoul(optarg, NULL, 0);
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break;
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case 'h':
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usage(EXIT_SUCCESS);
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break;
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default:
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usage(EXIT_FAILURE);
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break;
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}
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}
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if (signature == NULL) {
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ERR("no signature specified");
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goto err;
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}
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if (ifname == NULL) {
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ERR("no input file specified");
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goto err;
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}
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if (ofname == NULL) {
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ERR("no output file specified");
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goto err;
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}
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if (devname == NULL) {
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ERR("no device name specified");
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goto err;
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}
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if (model == NULL) {
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ERR("no model name specified");
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goto err;
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}
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if (buildno == NULL) {
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ERR("no build number specified");
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goto err;
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}
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if (version == NULL) {
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ERR("no version specified");
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goto err;
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}
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err = stat(ifname, &st);
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if (err){
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ERRS("stat failed on %s", ifname);
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goto err;
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}
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buflen = st.st_size + sizeof(struct wrgg03_header);
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buf = malloc(buflen);
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if (!buf) {
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ERR("no memory for buffer\n");
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goto err;
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}
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infile = fopen(ifname, "r");
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if (infile == NULL) {
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ERRS("could not open \"%s\" for reading", ifname);
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goto err_free;
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}
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errno = 0;
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fread(buf + sizeof(struct wrgg03_header), st.st_size, 1, infile);
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if (errno != 0) {
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ERRS("unable to read from file %s", ifname);
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goto close_in;
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}
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header = (struct wrgg03_header *) buf;
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memset(header, '\0', sizeof(struct wrgg03_header));
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strncpy(header->signature, signature, sizeof(header->signature));
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put_u32(&header->magic1, WRGG03_MAGIC, 0);
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put_u32(&header->magic2, WRGG03_MAGIC, 0);
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strncpy(header->version, version, sizeof(header->version));
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strncpy(header->model, model, sizeof(header->model));
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put_u32(&header->flag, flag, 0);
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put_u32(&header->reserve, reserve, 0);
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strncpy(header->buildno, buildno, sizeof(header->buildno));
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put_u32(&header->size, st.st_size, big_endian);
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put_u32(&header->offset, offset, big_endian);
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strncpy(header->devname, devname, sizeof(header->devname));
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get_digest(header, buf + sizeof(struct wrgg03_header), st.st_size);
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outfile = fopen(ofname, "w");
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if (outfile == NULL) {
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ERRS("could not open \"%s\" for writing", ofname);
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goto close_in;
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}
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errno = 0;
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fwrite(buf, buflen, 1, outfile);
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if (errno) {
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ERRS("unable to write to file %s", ofname);
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goto close_out;
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}
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fflush(outfile);
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res = EXIT_SUCCESS;
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close_out:
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fclose(outfile);
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if (res != EXIT_SUCCESS)
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unlink(ofname);
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close_in:
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fclose(infile);
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err_free:
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free(buf);
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err:
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return res;
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}
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