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_WR841ND_V5 0x08410005
39 #define HWID_TL_WR941ND_V2 0x09410002
40 #define HWID_TL_WR1043ND_V1 0x10430001
45 char *file_name; /* name of the file */
46 uint32_t file_size; /* length of the file */
50 uint32_t version; /* header version */
53 uint32_t hw_id; /* hardware id */
54 uint32_t hw_rev; /* hardware revision */
56 uint8_t md5sum1[MD5SUM_LEN];
58 uint8_t md5sum2[MD5SUM_LEN];
60 uint32_t kernel_la; /* kernel load address */
61 uint32_t kernel_ep; /* kernel entry point */
62 uint32_t fw_length; /* total length of the firmware */
63 uint32_t kernel_ofs; /* kernel data offset */
64 uint32_t kernel_len; /* kernel data length */
65 uint32_t rootfs_ofs; /* rootfs data offset */
66 uint32_t rootfs_len; /* rootfs data length */
67 uint32_t boot_ofs; /* bootloader data offset */
68 uint32_t boot_len; /* bootloader data length */
70 } __attribute__ ((packed));
86 static char *progname;
87 static char *vendor = "TP-LINK Technologies";
88 static char *version = "ver. 1.0";
90 static char *board_id;
91 static struct board_info *board;
92 static struct file_info kernel_info;
93 static struct file_info rootfs_info;
94 static struct file_info boot_info;
97 char md5salt_normal[MD5SUM_LEN] = {
98 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
99 0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
102 char md5salt_boot[MD5SUM_LEN] = {
103 0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
104 0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
107 static struct board_info boards[] = {
109 .id = "TL-WR741NDv1",
110 .hw_id = HWID_TL_WR741ND_V1,
112 .fw_max_len = 0x3c0000,
113 .kernel_la = 0x80060000,
114 .kernel_ep = 0x80060000,
115 .rootfs_ofs = 0x140000,
117 .id = "TL-WR841NDv3",
118 .hw_id = HWID_TL_WR841ND_V3,
120 .fw_max_len = 0x3c0000,
121 .kernel_la = 0x80060000,
122 .kernel_ep = 0x80060000,
123 .rootfs_ofs = 0x140000,
125 .id = "TL-WR841NDv5",
126 .hw_id = HWID_TL_WR841ND_V5,
128 .fw_max_len = 0x3c0000,
129 .kernel_la = 0x80060000,
130 .kernel_ep = 0x80060000,
131 .rootfs_ofs = 0x140000,
133 .id = "TL-WR941NDv2",
134 .hw_id = HWID_TL_WR941ND_V2,
136 .fw_max_len = 0x3c0000,
137 .kernel_la = 0x80060000,
138 .kernel_ep = 0x80060000,
139 .rootfs_ofs = 0x140000,
141 .id = "TL-WR1043NDv1",
142 .hw_id = HWID_TL_WR1043ND_V1,
144 .fw_max_len = 0x7c0000,
145 .kernel_la = 0x80060000,
146 .kernel_ep = 0x80060000,
147 .rootfs_ofs = 0x140000,
149 /* terminating entry */
156 #define ERR(fmt, ...) do { \
158 fprintf(stderr, "[%s] *** error: " fmt "\n", \
159 progname, ## __VA_ARGS__ ); \
162 #define ERRS(fmt, ...) do { \
165 fprintf(stderr, "[%s] *** error: " fmt "\n", \
166 progname, ## __VA_ARGS__, strerror(save)); \
169 #define DBG(fmt, ...) do { \
170 fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
173 static struct board_info *find_board(char *id)
175 struct board_info *ret;
176 struct board_info *board;
179 for (board = boards; board->id != NULL; board++){
180 if (strcasecmp(id, board->id) == 0) {
189 static void usage(int status)
191 FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
192 struct board_info *board;
194 fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
198 " -B <board> create image for the board specified with <board>\n"
199 " -c use combined kernel image\n"
200 " -k <file> read kernel image from the file <file>\n"
201 " -r <file> read rootfs image from the file <file>\n"
202 " -o <file> write output to the file <file>\n"
203 " -v <version> set image version to <version>\n"
204 " -h show this screen\n"
210 static int get_md5(char *data, int size, char *md5)
215 MD5_Update(&ctx, data, size);
216 MD5_Final(md5, &ctx);
219 static int get_file_stat(struct file_info *fdata)
224 if (fdata->file_name == NULL)
227 res = stat(fdata->file_name, &st);
229 ERRS("stat failed on %s", fdata->file_name);
233 fdata->file_size = st.st_size;
237 static int read_to_buf(struct file_info *fdata, char *buf)
240 int ret = EXIT_FAILURE;
242 f = fopen(fdata->file_name, "r");
244 ERRS("could not open \"%s\" for reading", fdata->file_name);
249 fread(buf, fdata->file_size, 1, f);
251 ERRS("unable to read from file \"%s\"", fdata->file_name);
263 static int check_options(void)
267 if (board_id == NULL) {
268 ERR("no board specified");
272 board = find_board(board_id);
274 ERR("unknown/unsupported board id \"%s\"", board_id);
278 if (kernel_info.file_name == NULL) {
279 ERR("no kernel image specified");
283 ret = get_file_stat(&kernel_info);
288 if (kernel_info.file_size >
289 board->fw_max_len - sizeof(struct fw_header)) {
290 ERR("kernel image is too big");
294 if (kernel_info.file_size >
295 board->rootfs_ofs - sizeof(struct fw_header)) {
296 ERR("kernel image is too big");
299 if (rootfs_info.file_name == NULL) {
300 ERR("no rootfs image specified");
304 ret = get_file_stat(&rootfs_info);
308 if (rootfs_info.file_size >
309 (board->fw_max_len - board->rootfs_ofs)) {
310 ERR("rootfs image is too big");
315 if (ofname == NULL) {
316 ERR("no output file specified");
323 static void fill_header(char *buf, int len)
325 struct fw_header *hdr = (struct fw_header *)buf;
327 memset(hdr, 0, sizeof(struct fw_header));
329 hdr->version = HOST_TO_BE32(HEADER_VERSION_V1);
330 strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
331 strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
332 hdr->hw_id = HOST_TO_BE32(board->hw_id);
333 hdr->hw_rev = HOST_TO_BE32(board->hw_rev);
335 if (boot_info.file_size == 0)
336 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
338 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
340 hdr->kernel_la = HOST_TO_BE32(board->kernel_la);
341 hdr->kernel_ep = HOST_TO_BE32(board->kernel_ep);
342 hdr->fw_length = HOST_TO_BE32(board->fw_max_len);
343 hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header));
344 hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size);
346 hdr->rootfs_ofs = HOST_TO_BE32(board->rootfs_ofs);
347 hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size);
350 get_md5(buf, len, hdr->md5sum1);
353 static int write_fw(char *data, int len)
356 int ret = EXIT_FAILURE;
358 f = fopen(ofname, "w");
360 ERRS("could not open \"%s\" for writing", ofname);
365 fwrite(data, len, 1, f);
367 ERRS("unable to write output file");
371 DBG("firmware file \"%s\" completed", ofname);
378 if (ret != EXIT_SUCCESS) {
385 static int build_fw(void)
390 int ret = EXIT_FAILURE;
392 buflen = board->fw_max_len;
394 buf = malloc(buflen);
396 ERR("no memory for buffer\n");
400 memset(buf, 0xff, buflen);
401 p = buf + sizeof(struct fw_header);
402 ret = read_to_buf(&kernel_info, p);
407 p = buf + board->rootfs_ofs;
408 ret = read_to_buf(&rootfs_info, p);
413 fill_header(buf, buflen);
415 ret = write_fw(buf, buflen);
427 int main(int argc, char *argv[])
429 int ret = EXIT_FAILURE;
434 progname = basename(argv[0]);
439 c = getopt(argc, argv, "B:V:N:ck:r:o:v:h:");
457 kernel_info.file_name = optarg;
460 rootfs_info.file_name = optarg;
477 ret = check_options();