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_WR741ND_V1 0x07410001
37 #define HWID_TL_WR841ND_V3 0x08410003
38 #define HWID_TL_WR941ND_V2 0x09410002
43 char *file_name; /* name of the file */
44 uint32_t file_size; /* length of the file */
48 uint32_t version; /* header version */
51 uint32_t hw_id; /* hardware id */
52 uint32_t hw_rev; /* hardware revision */
54 uint8_t md5sum1[MD5SUM_LEN];
56 uint8_t md5sum2[MD5SUM_LEN];
58 uint32_t kernel_la; /* kernel load address */
59 uint32_t kernel_ep; /* kernel entry point */
60 uint32_t fw_length; /* total length of the firmware */
61 uint32_t kernel_ofs; /* kernel data offset */
62 uint32_t kernel_len; /* kernel data length */
63 uint32_t rootfs_ofs; /* rootfs data offset */
64 uint32_t rootfs_len; /* rootfs data length */
65 uint32_t boot_ofs; /* bootloader data offset */
66 uint32_t boot_len; /* bootloader data length */
68 } __attribute__ ((packed));
84 static char *progname;
85 static char *vendor = "TP-LINK Technologies";
86 static char *version = "ver. 1.0";
88 static char *board_id;
89 static struct board_info *board;
90 static struct file_info kernel_info;
91 static struct file_info rootfs_info;
92 static struct file_info boot_info;
95 char md5salt_normal[MD5SUM_LEN] = {
96 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
97 0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
100 char md5salt_boot[MD5SUM_LEN] = {
101 0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
102 0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
105 static struct board_info boards[] = {
107 .id = "TL-WR741NDv1",
108 .hw_id = HWID_TL_WR741ND_V1,
110 .fw_max_len = 0x3c0000,
111 .kernel_la = 0x80060000,
112 .kernel_ep = 0x80060000,
113 .rootfs_ofs = 0x140000,
115 .id = "TL-WR841NDv3",
116 .hw_id = HWID_TL_WR841ND_V3,
118 .fw_max_len = 0x3c0000,
119 .kernel_la = 0x80060000,
120 .kernel_ep = 0x80060000,
121 .rootfs_ofs = 0x140000,
123 .id = "TL-WR941NDv2",
124 .hw_id = HWID_TL_WR941ND_V2,
126 .fw_max_len = 0x3c0000,
127 .kernel_la = 0x80060000,
128 .kernel_ep = 0x80060000,
129 .rootfs_ofs = 0x140000,
131 /* terminating entry */
138 #define ERR(fmt, ...) do { \
140 fprintf(stderr, "[%s] *** error: " fmt "\n", \
141 progname, ## __VA_ARGS__ ); \
144 #define ERRS(fmt, ...) do { \
147 fprintf(stderr, "[%s] *** error: " fmt "\n", \
148 progname, ## __VA_ARGS__, strerror(save)); \
151 #define DBG(fmt, ...) do { \
152 fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
155 static struct board_info *find_board(char *id)
157 struct board_info *ret;
158 struct board_info *board;
161 for (board = boards; board->id != NULL; board++){
162 if (strcasecmp(id, board->id) == 0) {
171 static void usage(int status)
173 FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
174 struct board_info *board;
176 fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
180 " -B <board> create image for the board specified with <board>\n"
181 " -c use combined kernel image\n"
182 " -k <file> read kernel image from the file <file>\n"
183 " -r <file> read rootfs image from the file <file>\n"
184 " -o <file> write output to the file <file>\n"
185 " -v <version> set image version to <version>\n"
186 " -h show this screen\n"
192 static int get_md5(char *data, int size, char *md5)
197 MD5_Update(&ctx, data, size);
198 MD5_Final(md5, &ctx);
201 static int get_file_stat(struct file_info *fdata)
206 if (fdata->file_name == NULL)
209 res = stat(fdata->file_name, &st);
211 ERRS("stat failed on %s", fdata->file_name);
215 fdata->file_size = st.st_size;
219 static int read_to_buf(struct file_info *fdata, char *buf)
222 int ret = EXIT_FAILURE;
224 f = fopen(fdata->file_name, "r");
226 ERRS("could not open \"%s\" for reading", fdata->file_name);
231 fread(buf, fdata->file_size, 1, f);
233 ERRS("unable to read from file \"%s\"", fdata->file_name);
245 static int check_options(void)
249 if (board_id == NULL) {
250 ERR("no board specified");
254 board = find_board(board_id);
256 ERR("unknown/unsupported board id \"%s\"", board_id);
260 if (kernel_info.file_name == NULL) {
261 ERR("no kernel image specified");
265 ret = get_file_stat(&kernel_info);
270 if (kernel_info.file_size >
271 board->fw_max_len - sizeof(struct fw_header)) {
272 ERR("kernel image is too big");
276 if (kernel_info.file_size >
277 board->rootfs_ofs - sizeof(struct fw_header)) {
278 ERR("kernel image is too big");
281 if (rootfs_info.file_name == NULL) {
282 ERR("no rootfs image specified");
286 ret = get_file_stat(&rootfs_info);
290 if (rootfs_info.file_size >
291 (board->fw_max_len - board->rootfs_ofs)) {
292 ERR("rootfs image is too big");
297 if (ofname == NULL) {
298 ERR("no output file specified");
305 static void fill_header(char *buf, int len)
307 struct fw_header *hdr = (struct fw_header *)buf;
309 memset(hdr, 0, sizeof(struct fw_header));
311 hdr->version = HOST_TO_BE32(HEADER_VERSION_V1);
312 strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
313 strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
314 hdr->hw_id = HOST_TO_BE32(board->hw_id);
315 hdr->hw_rev = HOST_TO_BE32(board->hw_rev);
317 if (boot_info.file_size == 0)
318 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
320 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
322 hdr->kernel_la = HOST_TO_BE32(board->kernel_la);
323 hdr->kernel_ep = HOST_TO_BE32(board->kernel_ep);
324 hdr->fw_length = HOST_TO_BE32(board->fw_max_len);
325 hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header));
326 hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size);
328 hdr->rootfs_ofs = HOST_TO_BE32(board->rootfs_ofs);
329 hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size);
332 get_md5(buf, len, hdr->md5sum1);
335 static int write_fw(char *data, int len)
338 int ret = EXIT_FAILURE;
340 f = fopen(ofname, "w");
342 ERRS("could not open \"%s\" for writing", ofname);
347 fwrite(data, len, 1, f);
349 ERRS("unable to write output file");
353 DBG("firmware file \"%s\" completed", ofname);
360 if (ret != EXIT_SUCCESS) {
367 static int build_fw(void)
372 int ret = EXIT_FAILURE;
374 buflen = board->fw_max_len;
376 buf = malloc(buflen);
378 ERR("no memory for buffer\n");
382 memset(buf, 0xff, buflen);
383 p = buf + sizeof(struct fw_header);
384 ret = read_to_buf(&kernel_info, p);
389 p = buf + board->rootfs_ofs;
390 ret = read_to_buf(&rootfs_info, p);
395 fill_header(buf, buflen);
397 ret = write_fw(buf, buflen);
409 int main(int argc, char *argv[])
411 int ret = EXIT_FAILURE;
416 progname = basename(argv[0]);
421 c = getopt(argc, argv, "B:V:N:ck:r:o:v:h:");
439 kernel_info.file_name = optarg;
442 rootfs_info.file_name = optarg;
459 ret = check_options();