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
41 char *file_name; /* name of the file */
42 uint32_t file_size; /* length of the file */
46 uint32_t version; /* header version */
49 uint32_t hw_id; /* hardware id */
50 uint32_t hw_rev; /* hardware revision */
52 uint8_t md5sum1[MD5SUM_LEN];
54 uint8_t md5sum2[MD5SUM_LEN];
56 uint32_t kernel_la; /* kernel load address */
57 uint32_t kernel_ep; /* kernel entry point */
58 uint32_t fw_length; /* total length of the firmware */
59 uint32_t kernel_ofs; /* kernel data offset */
60 uint32_t kernel_len; /* kernel data length */
61 uint32_t rootfs_ofs; /* rootfs data offset */
62 uint32_t rootfs_len; /* rootfs data length */
63 uint32_t boot_ofs; /* bootloader data offset */
64 uint32_t boot_len; /* bootloader data length */
66 } __attribute__ ((packed));
82 static char *progname;
83 static char *vendor = "TP-LINK Technologies";
84 static char *version = "ver. 1.0";
86 static char *board_id;
87 static struct board_info *board;
88 static struct file_info kernel_info;
89 static struct file_info rootfs_info;
90 static struct file_info boot_info;
92 char md5salt_normal[MD5SUM_LEN] = {
93 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
94 0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
97 char md5salt_boot[MD5SUM_LEN] = {
98 0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
99 0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
102 static struct board_info boards[] = {
104 .id = "TL-WR941NDv2",
105 .hw_id = HWID_TL_WR941ND_V2,
107 .fw_max_len = 0x3c0000,
108 .kernel_la = 0x80060000,
109 .kernel_ep = 0x80060000,
110 .rootfs_ofs = 0x120000,
112 /* terminating entry */
119 #define ERR(fmt, ...) do { \
121 fprintf(stderr, "[%s] *** error: " fmt "\n", \
122 progname, ## __VA_ARGS__ ); \
125 #define ERRS(fmt, ...) do { \
128 fprintf(stderr, "[%s] *** error: " fmt "\n", \
129 progname, ## __VA_ARGS__, strerror(save)); \
132 #define DBG(fmt, ...) do { \
133 fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
136 static struct board_info *find_board(char *id)
138 struct board_info *ret;
139 struct board_info *board;
142 for (board = boards; board->id != NULL; board++){
143 if (strcasecmp(id, board->id) == 0) {
152 static void usage(int status)
154 FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
155 struct board_info *board;
157 fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
161 " -B <board> create image for the board specified with <board>\n"
162 " -k <file> read kernel image from the file <file>\n"
163 " -r <file> read rootfs image from the file <file>\n"
164 " -o <file> write output to the file <file>\n"
165 " -v <version> set image version to <version>\n"
166 " -h show this screen\n"
172 static int get_md5(char *data, int size, char *md5)
177 MD5_Update(&ctx, data, size);
178 MD5_Final(md5, &ctx);
181 static int get_file_stat(struct file_info *fdata)
186 if (fdata->file_name == NULL)
189 res = stat(fdata->file_name, &st);
191 ERRS("stat failed on %s", fdata->file_name);
195 fdata->file_size = st.st_size;
199 static int read_to_buf(struct file_info *fdata, char *buf)
202 int ret = EXIT_FAILURE;
204 f = fopen(fdata->file_name, "r");
206 ERRS("could not open \"%s\" for reading", fdata->file_name);
211 fread(buf, fdata->file_size, 1, f);
213 ERRS("unable to read from file \"%s\"", fdata->file_name);
225 static int check_options(void)
229 if (board_id == NULL) {
230 ERR("no board specified");
234 board = find_board(board_id);
236 ERR("unknown/unsupported board id \"%s\"", board_id);
240 if (kernel_info.file_name == NULL) {
241 ERR("no kernel image specified");
245 ret = get_file_stat(&kernel_info);
249 if (kernel_info.file_size > board->rootfs_ofs - sizeof(struct fw_header)) {
250 ERR("kernel image is too big");
254 if (rootfs_info.file_name == NULL) {
255 ERR("no rootfs image specified");
259 ret = get_file_stat(&rootfs_info);
263 if (rootfs_info.file_size > (board->fw_max_len - board->rootfs_ofs)) {
264 ERR("rootfs image is too big");
268 if (ofname == NULL) {
269 ERR("no output file specified");
276 static void fill_header(char *buf, int len)
278 struct fw_header *hdr = (struct fw_header *)buf;
280 memset(hdr, 0, sizeof(struct fw_header));
282 hdr->version = HOST_TO_BE32(HEADER_VERSION_V1);
283 strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
284 strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
285 hdr->hw_id = HOST_TO_BE32(board->hw_id);
286 hdr->hw_rev = HOST_TO_BE32(board->hw_rev);
288 if (boot_info.file_size == 0)
289 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
291 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
293 hdr->kernel_la = HOST_TO_BE32(board->kernel_la);
294 hdr->kernel_ep = HOST_TO_BE32(board->kernel_ep);
295 hdr->fw_length = HOST_TO_BE32(board->fw_max_len);
296 hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header));
297 hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size);
298 hdr->rootfs_ofs = HOST_TO_BE32(board->rootfs_ofs);
299 hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size);
301 get_md5(buf, len, hdr->md5sum1);
304 static int write_fw(char *data, int len)
307 int ret = EXIT_FAILURE;
309 f = fopen(ofname, "w");
311 ERRS("could not open \"%s\" for writing", ofname);
316 fwrite(data, len, 1, f);
318 ERRS("unable to write output file");
322 DBG("firmware file \"%s\" completed", ofname);
329 if (ret != EXIT_SUCCESS) {
336 static int build_fw(void)
341 int ret = EXIT_FAILURE;
343 buflen = board->fw_max_len;
345 buf = malloc(buflen);
347 ERR("no memory for buffer\n");
351 memset(buf, 0xff, buflen);
352 p = buf + sizeof(struct fw_header);
353 ret = read_to_buf(&kernel_info, p);
357 p = buf + board->rootfs_ofs;
358 ret = read_to_buf(&rootfs_info, p);
362 fill_header(buf, buflen);
364 ret = write_fw(buf, buflen);
376 int main(int argc, char *argv[])
378 int ret = EXIT_FAILURE;
383 progname = basename(argv[0]);
388 c = getopt(argc, argv, "B:V:N:k:r:o:v:h:");
403 kernel_info.file_name = optarg;
406 rootfs_info.file_name = optarg;
423 ret = check_options();