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_WA901ND_V1 0x09010001
37 #define HWID_TL_WR741ND_V1 0x07410001
38 #define HWID_TL_WR841N_V1_5 0x08410002
39 #define HWID_TL_WR841ND_V3 0x08410003
40 #define HWID_TL_WR841ND_V5 0x08410005
41 #define HWID_TL_WR941ND_V2 0x09410002
42 #define HWID_TL_WR941ND_V4 0x09410004
43 #define HWID_TL_WR1043ND_V1 0x10430001
48 char *file_name; /* name of the file */
49 uint32_t file_size; /* length of the file */
53 uint32_t version; /* header version */
56 uint32_t hw_id; /* hardware id */
57 uint32_t hw_rev; /* hardware revision */
59 uint8_t md5sum1[MD5SUM_LEN];
61 uint8_t md5sum2[MD5SUM_LEN];
63 uint32_t kernel_la; /* kernel load address */
64 uint32_t kernel_ep; /* kernel entry point */
65 uint32_t fw_length; /* total length of the firmware */
66 uint32_t kernel_ofs; /* kernel data offset */
67 uint32_t kernel_len; /* kernel data length */
68 uint32_t rootfs_ofs; /* rootfs data offset */
69 uint32_t rootfs_len; /* rootfs data length */
70 uint32_t boot_ofs; /* bootloader data offset */
71 uint32_t boot_len; /* bootloader data length */
73 } __attribute__ ((packed));
89 static char *progname;
90 static char *vendor = "TP-LINK Technologies";
91 static char *version = "ver. 1.0";
93 static char *board_id;
94 static struct board_info *board;
95 static struct file_info kernel_info;
96 static struct file_info rootfs_info;
97 static struct file_info boot_info;
99 static int strip_padding;
101 char md5salt_normal[MD5SUM_LEN] = {
102 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
103 0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
106 char md5salt_boot[MD5SUM_LEN] = {
107 0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
108 0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
111 static struct board_info boards[] = {
113 .id = "TL-WA901NDv1",
114 .hw_id = HWID_TL_WA901ND_V1,
116 .fw_max_len = 0x3c0000,
117 .kernel_la = 0x80060000,
118 .kernel_ep = 0x80060000,
119 .rootfs_ofs = 0x140000,
121 .id = "TL-WR741NDv1",
122 .hw_id = HWID_TL_WR741ND_V1,
124 .fw_max_len = 0x3c0000,
125 .kernel_la = 0x80060000,
126 .kernel_ep = 0x80060000,
127 .rootfs_ofs = 0x140000,
129 .id = "TL-WR841Nv1.5",
130 .hw_id = HWID_TL_WR841N_V1_5,
132 .fw_max_len = 0x3c0000,
133 .kernel_la = 0x80060000,
134 .kernel_ep = 0x80060000,
135 .rootfs_ofs = 0x140000,
137 .id = "TL-WR841NDv3",
138 .hw_id = HWID_TL_WR841ND_V3,
140 .fw_max_len = 0x3c0000,
141 .kernel_la = 0x80060000,
142 .kernel_ep = 0x80060000,
143 .rootfs_ofs = 0x140000,
145 .id = "TL-WR841NDv5",
146 .hw_id = HWID_TL_WR841ND_V5,
148 .fw_max_len = 0x3c0000,
149 .kernel_la = 0x80060000,
150 .kernel_ep = 0x80060000,
151 .rootfs_ofs = 0x140000,
153 .id = "TL-WR941NDv2",
154 .hw_id = HWID_TL_WR941ND_V2,
156 .fw_max_len = 0x3c0000,
157 .kernel_la = 0x80060000,
158 .kernel_ep = 0x80060000,
159 .rootfs_ofs = 0x140000,
161 .id = "TL-WR941NDv4",
162 .hw_id = HWID_TL_WR941ND_V4,
164 .fw_max_len = 0x3c0000,
165 .kernel_la = 0x80060000,
166 .kernel_ep = 0x80060000,
167 .rootfs_ofs = 0x140000,
169 .id = "TL-WR1043NDv1",
170 .hw_id = HWID_TL_WR1043ND_V1,
172 .fw_max_len = 0x7c0000,
173 .kernel_la = 0x80060000,
174 .kernel_ep = 0x80060000,
175 .rootfs_ofs = 0x140000,
177 /* terminating entry */
184 #define ERR(fmt, ...) do { \
186 fprintf(stderr, "[%s] *** error: " fmt "\n", \
187 progname, ## __VA_ARGS__ ); \
190 #define ERRS(fmt, ...) do { \
193 fprintf(stderr, "[%s] *** error: " fmt "\n", \
194 progname, ## __VA_ARGS__, strerror(save)); \
197 #define DBG(fmt, ...) do { \
198 fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
201 static struct board_info *find_board(char *id)
203 struct board_info *ret;
204 struct board_info *board;
207 for (board = boards; board->id != NULL; board++){
208 if (strcasecmp(id, board->id) == 0) {
217 static void usage(int status)
219 FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
220 struct board_info *board;
222 fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
226 " -B <board> create image for the board specified with <board>\n"
227 " -c use combined kernel image\n"
228 " -k <file> read kernel image from the file <file>\n"
229 " -r <file> read rootfs image from the file <file>\n"
230 " -o <file> write output to the file <file>\n"
231 " -s strip padding from the end of the image\n"
232 " -N <vendor> set image vendor to <vendor>\n"
233 " -V <version> set image version to <version>\n"
234 " -h show this screen\n"
240 static int get_md5(char *data, int size, char *md5)
245 MD5_Update(&ctx, data, size);
246 MD5_Final(md5, &ctx);
249 static int get_file_stat(struct file_info *fdata)
254 if (fdata->file_name == NULL)
257 res = stat(fdata->file_name, &st);
259 ERRS("stat failed on %s", fdata->file_name);
263 fdata->file_size = st.st_size;
267 static int read_to_buf(struct file_info *fdata, char *buf)
270 int ret = EXIT_FAILURE;
272 f = fopen(fdata->file_name, "r");
274 ERRS("could not open \"%s\" for reading", fdata->file_name);
279 fread(buf, fdata->file_size, 1, f);
281 ERRS("unable to read from file \"%s\"", fdata->file_name);
293 static int check_options(void)
297 if (board_id == NULL) {
298 ERR("no board specified");
302 board = find_board(board_id);
304 ERR("unknown/unsupported board id \"%s\"", board_id);
308 if (kernel_info.file_name == NULL) {
309 ERR("no kernel image specified");
313 ret = get_file_stat(&kernel_info);
318 if (kernel_info.file_size >
319 board->fw_max_len - sizeof(struct fw_header)) {
320 ERR("kernel image is too big");
324 if (kernel_info.file_size >
325 board->rootfs_ofs - sizeof(struct fw_header)) {
326 ERR("kernel image is too big");
329 if (rootfs_info.file_name == NULL) {
330 ERR("no rootfs image specified");
334 ret = get_file_stat(&rootfs_info);
338 if (rootfs_info.file_size >
339 (board->fw_max_len - board->rootfs_ofs)) {
340 ERR("rootfs image is too big");
345 if (ofname == NULL) {
346 ERR("no output file specified");
353 static void fill_header(char *buf, int len)
355 struct fw_header *hdr = (struct fw_header *)buf;
357 memset(hdr, 0, sizeof(struct fw_header));
359 hdr->version = HOST_TO_BE32(HEADER_VERSION_V1);
360 strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
361 strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
362 hdr->hw_id = HOST_TO_BE32(board->hw_id);
363 hdr->hw_rev = HOST_TO_BE32(board->hw_rev);
365 if (boot_info.file_size == 0)
366 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
368 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
370 hdr->kernel_la = HOST_TO_BE32(board->kernel_la);
371 hdr->kernel_ep = HOST_TO_BE32(board->kernel_ep);
372 hdr->fw_length = HOST_TO_BE32(board->fw_max_len);
373 hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header));
374 hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size);
376 hdr->rootfs_ofs = HOST_TO_BE32(board->rootfs_ofs);
377 hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size);
380 get_md5(buf, len, hdr->md5sum1);
383 static int write_fw(char *data, int len)
386 int ret = EXIT_FAILURE;
388 f = fopen(ofname, "w");
390 ERRS("could not open \"%s\" for writing", ofname);
395 fwrite(data, len, 1, f);
397 ERRS("unable to write output file");
401 DBG("firmware file \"%s\" completed", ofname);
408 if (ret != EXIT_SUCCESS) {
415 static int build_fw(void)
420 int ret = EXIT_FAILURE;
423 buflen = board->fw_max_len;
425 buf = malloc(buflen);
427 ERR("no memory for buffer\n");
431 memset(buf, 0xff, buflen);
432 p = buf + sizeof(struct fw_header);
433 ret = read_to_buf(&kernel_info, p);
437 writelen = kernel_info.file_size;
440 p = buf + board->rootfs_ofs;
441 ret = read_to_buf(&rootfs_info, p);
445 writelen = board->rootfs_ofs + rootfs_info.file_size;
451 fill_header(buf, writelen);
452 ret = write_fw(buf, writelen);
464 int main(int argc, char *argv[])
466 int ret = EXIT_FAILURE;
471 progname = basename(argv[0]);
476 c = getopt(argc, argv, "B:V:N:ck:r:o:hs");
494 kernel_info.file_name = optarg;
497 rootfs_info.file_name = optarg;
514 ret = check_options();