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 #include <arpa/inet.h>
28 #include <netinet/in.h>
31 #include "mktplinkfw-lib.h"
33 #define HEADER_VERSION_V1 0x01000000
34 #define HEADER_VERSION_V2 0x02000000
37 uint32_t version
; /* header version */
40 uint32_t hw_id
; /* hardware id */
41 uint32_t hw_rev
; /* hardware revision */
42 uint32_t region_code
; /* region code */
43 uint8_t md5sum1
[MD5SUM_LEN
];
45 uint8_t md5sum2
[MD5SUM_LEN
];
47 uint32_t kernel_la
; /* kernel load address */
48 uint32_t kernel_ep
; /* kernel entry point */
49 uint32_t fw_length
; /* total length of the firmware */
50 uint32_t kernel_ofs
; /* kernel data offset */
51 uint32_t kernel_len
; /* kernel data length */
52 uint32_t rootfs_ofs
; /* rootfs data offset */
53 uint32_t rootfs_len
; /* rootfs data length */
54 uint32_t boot_ofs
; /* bootloader data offset */
55 uint32_t boot_len
; /* bootloader data length */
63 } __attribute__ ((packed
));
76 static char *vendor
= "TP-LINK Technologies";
77 static char *version
= "ver. 1.0";
78 static char *fw_ver
= "0.0.0";
79 static uint32_t hdr_ver
= HEADER_VERSION_V1
;
81 static char *layout_id
;
82 struct flash_layout
*layout
;
83 static char *opt_hw_id
;
84 static uint32_t hw_id
;
85 static char *opt_hw_rev
;
86 static uint32_t hw_rev
;
87 static uint32_t opt_hdr_ver
= 1;
89 static const struct fw_region
*region
;
91 static int fw_ver_mid
;
93 struct file_info kernel_info
;
94 static uint32_t kernel_la
= 0;
95 static uint32_t kernel_ep
= 0;
96 uint32_t kernel_len
= 0;
97 struct file_info rootfs_info
;
98 uint32_t rootfs_ofs
= 0;
99 uint32_t rootfs_align
;
100 static struct file_info boot_info
;
104 static uint32_t fw_max_len
;
105 static uint32_t reserved_space
;
107 static struct file_info inspect_info
;
108 static int extract
= 0;
109 static bool endian_swap
= false;
111 static const char md5salt_normal
[MD5SUM_LEN
] = {
112 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
113 0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
116 static const char md5salt_boot
[MD5SUM_LEN
] = {
117 0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
118 0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
121 static struct flash_layout layouts
[] = {
124 .fw_max_len
= 0x3c0000,
125 .kernel_la
= 0x80060000,
126 .kernel_ep
= 0x80060000,
127 .rootfs_ofs
= 0x140000,
130 .fw_max_len
= 0x3c0000,
131 .kernel_la
= 0x80060000,
132 .kernel_ep
= 0x80060000,
133 .rootfs_ofs
= 0x100000,
136 .fw_max_len
= 0x7c0000,
137 .kernel_la
= 0x80060000,
138 .kernel_ep
= 0x80060000,
139 .rootfs_ofs
= 0x140000,
142 .fw_max_len
= 0x7c0000,
143 .kernel_la
= 0x80060000,
144 .kernel_ep
= 0x80060000,
145 .rootfs_ofs
= 0x100000,
148 .fw_max_len
= 0xf80000,
149 .kernel_la
= 0x80060000,
150 .kernel_ep
= 0x80060000,
151 .rootfs_ofs
= 0x140000,
154 .fw_max_len
= 0xf80000,
155 .kernel_la
= 0x80060000,
156 .kernel_ep
= 0x80060000,
157 .rootfs_ofs
= 0x100000,
160 .fw_max_len
= 0xf80000,
161 .kernel_la
= 0x00000000 ,
162 .kernel_ep
= 0xc0000000,
163 .rootfs_ofs
= 0x2a0000,
165 /* terminating entry */
169 static const struct fw_region regions
[] = {
170 /* Default region (universal) uses code 0 as well */
176 static const struct fw_region
* find_region(const char *country
) {
179 for (i
= 0; i
< ARRAY_SIZE(regions
); i
++) {
180 if (strcasecmp(regions
[i
].name
, country
) == 0)
187 static void usage(int status
)
189 fprintf(stderr
, "Usage: %s [OPTIONS...]\n", progname
);
193 " -c use combined kernel image\n"
194 " -e swap endianness in kernel load address and entry point\n"
195 " -E <ep> overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
196 " -L <la> overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
197 " -H <hwid> use hardware id specified with <hwid>\n"
198 " -W <hwrev> use hardware revision specified with <hwrev>\n"
199 " -C <country> set region code to <country>\n"
200 " -F <id> use flash layout specified with <id>\n"
201 " -k <file> read kernel image from the file <file>\n"
202 " -r <file> read rootfs image from the file <file>\n"
203 " -a <align> align the rootfs start on an <align> bytes boundary\n"
204 " -R <offset> overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
205 " -o <file> write output to the file <file>\n"
206 " -s strip padding from the end of the image\n"
207 " -j add jffs2 end-of-filesystem markers\n"
208 " -N <vendor> set image vendor to <vendor>\n"
209 " -V <version> set image version to <version>\n"
210 " -v <version> set firmware version to <version>\n"
211 " -m <version> set header version to <version>\n"
212 " -i <file> inspect given firmware file <file>\n"
213 " -x extract kernel and rootfs while inspecting (requires -i)\n"
214 " -X <size> reserve <size> bytes in the firmware image (hexval prefixed with 0x)\n"
215 " -h show this screen\n"
221 static int check_options(void)
226 if (inspect_info
.file_name
) {
227 ret
= get_file_stat(&inspect_info
);
232 } else if (extract
) {
233 ERR("no firmware for inspection specified");
237 if (opt_hw_id
== NULL
) {
238 ERR("hardware id not specified");
241 hw_id
= strtoul(opt_hw_id
, NULL
, 0);
243 if (!combined
&& layout_id
== NULL
) {
244 ERR("flash layout is not specified");
249 hw_rev
= strtoul(opt_hw_rev
, NULL
, 0);
254 region
= find_region(country
);
256 ERR("unknown region code \"%s\"", country
);
262 if (!kernel_la
|| !kernel_ep
) {
263 ERR("kernel loading address and entry point must be specified for combined image");
267 layout
= find_layout(layouts
, layout_id
);
268 if (layout
== NULL
) {
269 ERR("unknown flash layout \"%s\"", layout_id
);
274 kernel_la
= layout
->kernel_la
;
276 kernel_ep
= layout
->kernel_ep
;
278 rootfs_ofs
= layout
->rootfs_ofs
;
280 if (reserved_space
> layout
->fw_max_len
) {
281 ERR("reserved space is not valid");
286 if (kernel_info
.file_name
== NULL
) {
287 ERR("no kernel image specified");
291 ret
= get_file_stat(&kernel_info
);
295 kernel_len
= kernel_info
.file_size
;
298 fw_max_len
= layout
->fw_max_len
- reserved_space
;
300 if (rootfs_info
.file_name
== NULL
) {
301 ERR("no rootfs image specified");
305 ret
= get_file_stat(&rootfs_info
);
310 kernel_len
+= sizeof(struct fw_header
);
311 rootfs_ofs
= ALIGN(kernel_len
, rootfs_align
);
312 kernel_len
-= sizeof(struct fw_header
);
314 DBG("rootfs offset aligned to 0x%u", rootfs_ofs
);
316 exceed_bytes
= kernel_len
+ rootfs_info
.file_size
- (fw_max_len
- sizeof(struct fw_header
));
317 if (exceed_bytes
> 0) {
318 ERR("images are too big by %i bytes", exceed_bytes
);
322 exceed_bytes
= kernel_info
.file_size
- (rootfs_ofs
- sizeof(struct fw_header
));
323 if (exceed_bytes
> 0) {
324 ERR("kernel image is too big by %i bytes", exceed_bytes
);
328 exceed_bytes
= rootfs_info
.file_size
- (fw_max_len
- rootfs_ofs
);
329 if (exceed_bytes
> 0) {
330 ERR("rootfs image is too big by %i bytes", exceed_bytes
);
336 if (ofname
== NULL
) {
337 ERR("no output file specified");
341 ret
= sscanf(fw_ver
, "%d.%d.%d", &fw_ver_hi
, &fw_ver_mid
, &fw_ver_lo
);
343 ERR("invalid firmware version '%s'", fw_ver
);
347 if (opt_hdr_ver
== 1) {
348 hdr_ver
= HEADER_VERSION_V1
;
349 } else if (opt_hdr_ver
== 2) {
350 hdr_ver
= HEADER_VERSION_V2
;
352 ERR("invalid header version '%u'", opt_hdr_ver
);
359 void fill_header(char *buf
, int len
)
361 struct fw_header
*hdr
= (struct fw_header
*)buf
;
363 memset(hdr
, 0, sizeof(struct fw_header
));
365 hdr
->version
= htonl(hdr_ver
);
366 strncpy(hdr
->vendor_name
, vendor
, sizeof(hdr
->vendor_name
));
367 strncpy(hdr
->fw_version
, version
, sizeof(hdr
->fw_version
));
368 hdr
->hw_id
= htonl(hw_id
);
369 hdr
->hw_rev
= htonl(hw_rev
);
371 hdr
->kernel_la
= htonl(kernel_la
);
372 hdr
->kernel_ep
= htonl(kernel_ep
);
373 hdr
->kernel_ofs
= htonl(sizeof(struct fw_header
));
374 hdr
->kernel_len
= htonl(kernel_len
);
377 if (boot_info
.file_size
== 0)
378 memcpy(hdr
->md5sum1
, md5salt_normal
, sizeof(hdr
->md5sum1
));
380 memcpy(hdr
->md5sum1
, md5salt_boot
, sizeof(hdr
->md5sum1
));
382 hdr
->fw_length
= htonl(layout
->fw_max_len
);
383 hdr
->rootfs_ofs
= htonl(rootfs_ofs
);
384 hdr
->rootfs_len
= htonl(rootfs_info
.file_size
);
387 hdr
->ver_hi
= htons(fw_ver_hi
);
388 hdr
->ver_mid
= htons(fw_ver_mid
);
389 hdr
->ver_lo
= htons(fw_ver_lo
);
392 hdr
->region_code
= htonl(region
->code
);
394 hdr
->region_str1
, sizeof(hdr
->region_str1
), "00000000;%02X%02X%02X%02X;",
395 region
->name
[0], region
->name
[1], region
->name
[2], region
->name
[3]
398 hdr
->region_str2
, sizeof(hdr
->region_str2
), "%02X%02X%02X%02X",
399 region
->name
[0], region
->name
[1], region
->name
[2], region
->name
[3]
404 hdr
->kernel_la
= bswap_32(hdr
->kernel_la
);
405 hdr
->kernel_ep
= bswap_32(hdr
->kernel_ep
);
409 get_md5(buf
, len
, hdr
->md5sum1
);
412 static int inspect_fw(void)
415 struct fw_header
*hdr
;
416 uint8_t md5sum
[MD5SUM_LEN
];
417 int ret
= EXIT_FAILURE
;
419 buf
= malloc(inspect_info
.file_size
);
421 ERR("no memory for buffer!\n");
425 ret
= read_to_buf(&inspect_info
, buf
);
428 hdr
= (struct fw_header
*)buf
;
430 inspect_fw_pstr("File name", inspect_info
.file_name
);
431 inspect_fw_phexdec("File size", inspect_info
.file_size
);
433 if ((ntohl(hdr
->version
) != HEADER_VERSION_V1
) &&
434 (ntohl(hdr
->version
) != HEADER_VERSION_V2
)) {
435 ERR("file does not seem to have V1/V2 header!\n");
439 inspect_fw_phexdec("Version 1 Header size", sizeof(struct fw_header
));
441 memcpy(md5sum
, hdr
->md5sum1
, sizeof(md5sum
));
442 if (ntohl(hdr
->boot_len
) == 0)
443 memcpy(hdr
->md5sum1
, md5salt_normal
, sizeof(md5sum
));
445 memcpy(hdr
->md5sum1
, md5salt_boot
, sizeof(md5sum
));
446 get_md5(buf
, inspect_info
.file_size
, hdr
->md5sum1
);
448 if (memcmp(md5sum
, hdr
->md5sum1
, sizeof(md5sum
))) {
449 inspect_fw_pmd5sum("Header MD5Sum1", md5sum
, "(*ERROR*)");
450 inspect_fw_pmd5sum(" --> expected", hdr
->md5sum1
, "");
452 inspect_fw_pmd5sum("Header MD5Sum1", md5sum
, "(ok)");
454 if (ntohl(hdr
->unk2
) != 0)
455 inspect_fw_phexdec("Unknown value 2", hdr
->unk2
);
456 inspect_fw_pmd5sum("Header MD5Sum2", hdr
->md5sum2
,
457 "(purpose yet unknown, unchecked here)");
458 if (ntohl(hdr
->unk3
) != 0)
459 inspect_fw_phexdec("Unknown value 3", hdr
->unk3
);
463 inspect_fw_pstr("Vendor name", hdr
->vendor_name
);
464 inspect_fw_pstr("Firmware version", hdr
->fw_version
);
465 inspect_fw_phex("Hardware ID", ntohl(hdr
->hw_id
));
466 inspect_fw_phex("Hardware Revision", ntohl(hdr
->hw_rev
));
467 inspect_fw_phex("Region code", ntohl(hdr
->region_code
));
471 inspect_fw_phexdec("Kernel data offset",
472 ntohl(hdr
->kernel_ofs
));
473 inspect_fw_phexdec("Kernel data length",
474 ntohl(hdr
->kernel_len
));
475 inspect_fw_phex("Kernel load address",
476 ntohl(hdr
->kernel_la
));
477 inspect_fw_phex("Kernel entry point",
478 ntohl(hdr
->kernel_ep
));
479 inspect_fw_phexdec("Rootfs data offset",
480 ntohl(hdr
->rootfs_ofs
));
481 inspect_fw_phexdec("Rootfs data length",
482 ntohl(hdr
->rootfs_len
));
483 inspect_fw_phexdec("Boot loader data offset",
484 ntohl(hdr
->boot_ofs
));
485 inspect_fw_phexdec("Boot loader data length",
486 ntohl(hdr
->boot_len
));
487 inspect_fw_phexdec("Total firmware length",
488 ntohl(hdr
->fw_length
));
496 filename
= malloc(strlen(inspect_info
.file_name
) + 8);
497 sprintf(filename
, "%s-kernel", inspect_info
.file_name
);
498 printf("Extracting kernel to \"%s\"...\n", filename
);
499 fp
= fopen(filename
, "w");
501 if (!fwrite(buf
+ ntohl(hdr
->kernel_ofs
),
502 ntohl(hdr
->kernel_len
), 1, fp
)) {
503 ERR("error in fwrite(): %s", strerror(errno
));
507 ERR("error in fopen(): %s", strerror(errno
));
511 filename
= malloc(strlen(inspect_info
.file_name
) + 8);
512 sprintf(filename
, "%s-rootfs", inspect_info
.file_name
);
513 printf("Extracting rootfs to \"%s\"...\n", filename
);
514 fp
= fopen(filename
, "w");
516 if (!fwrite(buf
+ ntohl(hdr
->rootfs_ofs
),
517 ntohl(hdr
->rootfs_len
), 1, fp
)) {
518 ERR("error in fwrite(): %s", strerror(errno
));
522 ERR("error in fopen(): %s", strerror(errno
));
533 int main(int argc
, char *argv
[])
535 int ret
= EXIT_FAILURE
;
537 progname
= basename(argv
[0]);
542 c
= getopt(argc
, argv
, "a:H:E:F:L:m:V:N:W:C:ci:k:r:R:o:xX:ehsjv:");
548 sscanf(optarg
, "0x%x", &rootfs_align
);
554 sscanf(optarg
, "0x%x", &kernel_ep
);
566 sscanf(optarg
, "0x%x", &kernel_la
);
569 sscanf(optarg
, "%u", &opt_hdr_ver
);
584 kernel_info
.file_name
= optarg
;
587 rootfs_info
.file_name
= optarg
;
590 sscanf(optarg
, "0x%x", &rootfs_ofs
);
599 inspect_info
.file_name
= optarg
;
614 sscanf(optarg
, "0x%x", &reserved_space
);
622 ret
= check_options();
626 if (!inspect_info
.file_name
)
627 ret
= build_fw(sizeof(struct fw_header
));