2 * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
4 * This tool was based on:
5 * TP-Link WR941 V2 firmware checksum fixing tool.
6 * Copyright (C) 2008,2009 Wang Jian <lark@linux.net.cn>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
18 #include <unistd.h> /* for unlink() */
20 #include <getopt.h> /* for getopt() */
27 #if (__BYTE_ORDER == __BIG_ENDIAN)
28 # define HOST_TO_BE32(x) (x)
29 # define BE32_TO_HOST(x) (x)
31 # define HOST_TO_BE32(x) bswap_32(x)
32 # define BE32_TO_HOST(x) bswap_32(x)
35 #define HEADER_VERSION_V1 0x01000000
36 #define HWID_TL_WR941ND_V2 0x09410002
37 #define HWID_TL_WR841ND_V3 0x08410003
42 char *file_name; /* name of the file */
43 uint32_t file_size; /* length of the file */
47 uint32_t version; /* header version */
50 uint32_t hw_id; /* hardware id */
51 uint32_t hw_rev; /* hardware revision */
53 uint8_t md5sum1[MD5SUM_LEN];
55 uint8_t md5sum2[MD5SUM_LEN];
57 uint32_t kernel_la; /* kernel load address */
58 uint32_t kernel_ep; /* kernel entry point */
59 uint32_t fw_length; /* total length of the firmware */
60 uint32_t kernel_ofs; /* kernel data offset */
61 uint32_t kernel_len; /* kernel data length */
62 uint32_t rootfs_ofs; /* rootfs data offset */
63 uint32_t rootfs_len; /* rootfs data length */
64 uint32_t boot_ofs; /* bootloader data offset */
65 uint32_t boot_len; /* bootloader data length */
67 } __attribute__ ((packed));
83 static char *progname;
84 static char *vendor = "TP-LINK Technologies";
85 static char *version = "ver. 1.0";
87 static char *board_id;
88 static struct board_info *board;
89 static struct file_info kernel_info;
90 static struct file_info rootfs_info;
91 static struct file_info boot_info;
93 char md5salt_normal[MD5SUM_LEN] = {
94 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
95 0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
98 char md5salt_boot[MD5SUM_LEN] = {
99 0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
100 0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
103 static struct board_info boards[] = {
105 .id = "TL-WR841NDv3",
106 .hw_id = HWID_TL_WR841ND_V3,
108 .fw_max_len = 0x3c0000,
109 .kernel_la = 0x80060000,
110 .kernel_ep = 0x80060000,
111 .rootfs_ofs = 0x120000,
113 .id = "TL-WR941NDv2",
114 .hw_id = HWID_TL_WR941ND_V2,
116 .fw_max_len = 0x3c0000,
117 .kernel_la = 0x80060000,
118 .kernel_ep = 0x80060000,
119 .rootfs_ofs = 0x120000,
121 /* terminating entry */
128 #define ERR(fmt, ...) do { \
130 fprintf(stderr, "[%s] *** error: " fmt "\n", \
131 progname, ## __VA_ARGS__ ); \
134 #define ERRS(fmt, ...) do { \
137 fprintf(stderr, "[%s] *** error: " fmt "\n", \
138 progname, ## __VA_ARGS__, strerror(save)); \
141 #define DBG(fmt, ...) do { \
142 fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
145 static struct board_info *find_board(char *id)
147 struct board_info *ret;
148 struct board_info *board;
151 for (board = boards; board->id != NULL; board++){
152 if (strcasecmp(id, board->id) == 0) {
161 static void usage(int status)
163 FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
164 struct board_info *board;
166 fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
170 " -B <board> create image for the board specified with <board>\n"
171 " -k <file> read kernel image from the file <file>\n"
172 " -r <file> read rootfs image from the file <file>\n"
173 " -o <file> write output to the file <file>\n"
174 " -v <version> set image version to <version>\n"
175 " -h show this screen\n"
181 static int get_md5(char *data, int size, char *md5)
186 MD5_Update(&ctx, data, size);
187 MD5_Final(md5, &ctx);
190 static int get_file_stat(struct file_info *fdata)
195 if (fdata->file_name == NULL)
198 res = stat(fdata->file_name, &st);
200 ERRS("stat failed on %s", fdata->file_name);
204 fdata->file_size = st.st_size;
208 static int read_to_buf(struct file_info *fdata, char *buf)
211 int ret = EXIT_FAILURE;
213 f = fopen(fdata->file_name, "r");
215 ERRS("could not open \"%s\" for reading", fdata->file_name);
220 fread(buf, fdata->file_size, 1, f);
222 ERRS("unable to read from file \"%s\"", fdata->file_name);
234 static int check_options(void)
238 if (board_id == NULL) {
239 ERR("no board specified");
243 board = find_board(board_id);
245 ERR("unknown/unsupported board id \"%s\"", board_id);
249 if (kernel_info.file_name == NULL) {
250 ERR("no kernel image specified");
254 ret = get_file_stat(&kernel_info);
258 if (kernel_info.file_size > board->rootfs_ofs - sizeof(struct fw_header)) {
259 ERR("kernel image is too big");
263 if (rootfs_info.file_name == NULL) {
264 ERR("no rootfs image specified");
268 ret = get_file_stat(&rootfs_info);
272 if (rootfs_info.file_size > (board->fw_max_len - board->rootfs_ofs)) {
273 ERR("rootfs image is too big");
277 if (ofname == NULL) {
278 ERR("no output file specified");
285 static void fill_header(char *buf, int len)
287 struct fw_header *hdr = (struct fw_header *)buf;
289 memset(hdr, 0, sizeof(struct fw_header));
291 hdr->version = HOST_TO_BE32(HEADER_VERSION_V1);
292 strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
293 strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
294 hdr->hw_id = HOST_TO_BE32(board->hw_id);
295 hdr->hw_rev = HOST_TO_BE32(board->hw_rev);
297 if (boot_info.file_size == 0)
298 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
300 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
302 hdr->kernel_la = HOST_TO_BE32(board->kernel_la);
303 hdr->kernel_ep = HOST_TO_BE32(board->kernel_ep);
304 hdr->fw_length = HOST_TO_BE32(board->fw_max_len);
305 hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header));
306 hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size);
307 hdr->rootfs_ofs = HOST_TO_BE32(board->rootfs_ofs);
308 hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size);
310 get_md5(buf, len, hdr->md5sum1);
313 static int write_fw(char *data, int len)
316 int ret = EXIT_FAILURE;
318 f = fopen(ofname, "w");
320 ERRS("could not open \"%s\" for writing", ofname);
325 fwrite(data, len, 1, f);
327 ERRS("unable to write output file");
331 DBG("firmware file \"%s\" completed", ofname);
338 if (ret != EXIT_SUCCESS) {
345 static int build_fw(void)
350 int ret = EXIT_FAILURE;
352 buflen = board->fw_max_len;
354 buf = malloc(buflen);
356 ERR("no memory for buffer\n");
360 memset(buf, 0xff, buflen);
361 p = buf + sizeof(struct fw_header);
362 ret = read_to_buf(&kernel_info, p);
366 p = buf + board->rootfs_ofs;
367 ret = read_to_buf(&rootfs_info, p);
371 fill_header(buf, buflen);
373 ret = write_fw(buf, buflen);
385 int main(int argc, char *argv[])
387 int ret = EXIT_FAILURE;
392 progname = basename(argv[0]);
397 c = getopt(argc, argv, "B:V:N:k:r:o:v:h:");
412 kernel_info.file_name = optarg;
415 rootfs_info.file_name = optarg;
432 ret = check_options();