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firmware-utils: mktplinkfw2: replace "endian_swap" field with "flags"
[openwrt/openwrt.git] / tools / firmware-utils / src / mktplinkfw2.c
1 /*
2 * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
3 *
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>
7 *
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.
11 *
12 */
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <stdint.h>
17 #include <string.h>
18 #include <unistd.h> /* for unlink() */
19 #include <libgen.h>
20 #include <getopt.h> /* for getopt() */
21 #include <stdarg.h>
22 #include <errno.h>
23 #include <stdbool.h>
24 #include <endian.h>
25 #include <sys/stat.h>
26
27 #include <arpa/inet.h>
28 #include <netinet/in.h>
29
30 #include "md5.h"
31
32 #define ALIGN(x,a) ({ typeof(a) __a = (a); (((x) + __a - 1) & ~(__a - 1)); })
33
34 #define MD5SUM_LEN 16
35
36 struct file_info {
37 char *file_name; /* name of the file */
38 uint32_t file_size; /* length of the file */
39 };
40
41 struct fw_header {
42 uint32_t version; /* 0x00: header version */
43 char fw_version[48]; /* 0x04: fw version string */
44 uint32_t hw_id; /* 0x34: hardware id */
45 uint32_t hw_rev; /* 0x38: FIXME: hardware revision? */
46 uint32_t hw_ver_add; /* 0x3c: additional hardware version */
47 uint8_t md5sum1[MD5SUM_LEN]; /* 0x40 */
48 uint32_t unk2; /* 0x50: 0x00000000 */
49 uint8_t md5sum2[MD5SUM_LEN]; /* 0x54 */
50 uint32_t unk3; /* 0x64: 0xffffffff */
51
52 uint32_t kernel_la; /* 0x68: kernel load address */
53 uint32_t kernel_ep; /* 0x6c: kernel entry point */
54 uint32_t fw_length; /* 0x70: total length of the image */
55 uint32_t kernel_ofs; /* 0x74: kernel data offset */
56 uint32_t kernel_len; /* 0x78: kernel data length */
57 uint32_t rootfs_ofs; /* 0x7c: rootfs data offset */
58 uint32_t rootfs_len; /* 0x80: rootfs data length */
59 uint32_t boot_ofs; /* 0x84: bootloader offset */
60 uint32_t boot_len; /* 0x88: bootloader length */
61 uint16_t unk4; /* 0x8c: 0x55aa */
62 uint8_t sver_hi; /* 0x8e */
63 uint8_t sver_lo; /* 0x8f */
64 uint8_t unk5; /* 0x90: magic: 0xa5 */
65 uint8_t ver_hi; /* 0x91 */
66 uint8_t ver_mid; /* 0x92 */
67 uint8_t ver_lo; /* 0x93 */
68 uint8_t pad[364];
69 } __attribute__ ((packed));
70
71 struct flash_layout {
72 char *id;
73 uint32_t fw_max_len;
74 uint32_t kernel_la;
75 uint32_t kernel_ep;
76 uint32_t rootfs_ofs;
77 };
78
79 #define FLAG_LE_KERNEL_LA_EP 0x00000001 /* Little-endian used for kernel load address & entry point */
80
81 struct board_info {
82 char *id;
83 uint32_t hw_id;
84 uint32_t hw_rev;
85 uint32_t hw_ver_add;
86 char *layout_id;
87 uint32_t hdr_ver;
88 uint32_t flags;
89 };
90
91 /*
92 * Globals
93 */
94 static char *ofname;
95 static char *progname;
96 static char *vendor = "TP-LINK Technologies";
97 static char *version = "ver. 1.0";
98 static char *fw_ver = "0.0.0";
99 static char *sver = "1.0";
100 static uint32_t hdr_ver = 2;
101
102 static struct board_info custom_board;
103
104 static char *board_id;
105 static struct board_info *board;
106 static char *layout_id;
107 static struct flash_layout *layout;
108 static char *opt_hw_id;
109 static char *opt_hw_rev;
110 static char *opt_hw_ver_add;
111 static int fw_ver_lo;
112 static int fw_ver_mid;
113 static int fw_ver_hi;
114 static int sver_lo;
115 static int sver_hi;
116 static struct file_info kernel_info;
117 static uint32_t kernel_la = 0;
118 static uint32_t kernel_ep = 0;
119 static uint32_t kernel_len = 0;
120 static struct file_info rootfs_info;
121 static uint32_t rootfs_ofs = 0;
122 static uint32_t rootfs_align;
123 static struct file_info boot_info;
124 static int combined;
125 static int strip_padding;
126 static int add_jffs2_eof;
127 static unsigned char jffs2_eof_mark[4] = {0xde, 0xad, 0xc0, 0xde};
128
129 static struct file_info inspect_info;
130 static int extract = 0;
131
132 char md5salt_normal[MD5SUM_LEN] = {
133 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
134 0xdc, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x37,
135 };
136
137 char md5salt_boot[MD5SUM_LEN] = {
138 0x8c, 0xef, 0x33, 0x5f, 0xd5, 0xc5, 0xce, 0xfa,
139 0xac, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
140 };
141
142 static struct flash_layout layouts[] = {
143 {
144 .id = "8Mltq",
145 .fw_max_len = 0x7a0000,
146 .kernel_la = 0x80002000,
147 .kernel_ep = 0x80002000,
148 .rootfs_ofs = 0x140000,
149 }, {
150 .id = "16Mltq",
151 .fw_max_len = 0xf90000,
152 .kernel_la = 0x80002000,
153 .kernel_ep = 0x800061b0,
154 .rootfs_ofs = 0x140000,
155 }, {
156 .id = "8Mmtk",
157 .fw_max_len = 0x7a0000,
158 .kernel_la = 0x80000000,
159 .kernel_ep = 0x80000000,
160 .rootfs_ofs = 0x140000,
161 }, {
162 .id = "8MLmtk",
163 .fw_max_len = 0x7b0000,
164 .kernel_la = 0x80000000,
165 .kernel_ep = 0x80000000,
166 .rootfs_ofs = 0x140000,
167 }, {
168 /* terminating entry */
169 }
170 };
171
172 static struct board_info boards[] = {
173 {
174 .id = "TD-W8970v1",
175 .hw_id = 0x89700001,
176 .hw_rev = 1,
177 .layout_id = "8Mltq",
178 }, {
179 .id = "TD-W8980v1",
180 .hw_id = 0x89800001,
181 .hw_rev = 14,
182 .layout_id = "8Mltq",
183 }, {
184 .id = "ArcherC20i",
185 .hw_id = 0xc2000001,
186 .hw_rev = 58,
187 .layout_id = "8Mmtk",
188 .hdr_ver = 3,
189 .flags = FLAG_LE_KERNEL_LA_EP,
190 }, {
191 .id = "ArcherVR200V",
192 .hw_id = 0x73b70801,
193 .hw_rev = 0x2f,
194 .layout_id = "16Mltq",
195 .hdr_ver = 2,
196 }, {
197 .id = "ArcherC50",
198 .hw_id = 0xc7500001,
199 .hw_rev = 69,
200 .layout_id = "8Mmtk",
201 .hdr_ver = 3,
202 .flags = FLAG_LE_KERNEL_LA_EP,
203 }, {
204 .id = "ArcherMR200",
205 .hw_id = 0xd7500001,
206 .hw_rev = 0x4a,
207 .layout_id = "8MLmtk",
208 .hdr_ver = 3,
209 .flags = FLAG_LE_KERNEL_LA_EP,
210 }, {
211 .id = "TL-WR840NV4",
212 .hw_id = 0x08400004,
213 .hw_rev = 0x1,
214 .hw_ver_add = 0x4,
215 .layout_id = "8Mmtk",
216 .hdr_ver = 3,
217 .flags = FLAG_LE_KERNEL_LA_EP,
218 }, {
219 .id = "TL-WR841NV13",
220 .hw_id = 0x08410013,
221 .hw_rev = 0x268,
222 .hw_ver_add = 0x13,
223 .layout_id = "8Mmtk",
224 .hdr_ver = 3,
225 .flags = FLAG_LE_KERNEL_LA_EP,
226 }, {
227 /* terminating entry */
228 }
229 };
230
231 /*
232 * Message macros
233 */
234 #define ERR(fmt, ...) do { \
235 fflush(0); \
236 fprintf(stderr, "[%s] *** error: " fmt "\n", \
237 progname, ## __VA_ARGS__ ); \
238 } while (0)
239
240 #define ERRS(fmt, ...) do { \
241 int save = errno; \
242 fflush(0); \
243 fprintf(stderr, "[%s] *** error: " fmt ": %s\n", \
244 progname, ## __VA_ARGS__, strerror(save)); \
245 } while (0)
246
247 #define DBG(fmt, ...) do { \
248 fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
249 } while (0)
250
251 static struct board_info *find_board(char *id)
252 {
253 struct board_info *ret;
254 struct board_info *board;
255
256 ret = NULL;
257 for (board = boards; board->id != NULL; board++){
258 if (strcasecmp(id, board->id) == 0) {
259 ret = board;
260 break;
261 }
262 };
263
264 return ret;
265 }
266
267 static struct board_info *find_board_by_hwid(uint32_t hw_id)
268 {
269 struct board_info *board;
270
271 for (board = boards; board->id != NULL; board++) {
272 if (hw_id == board->hw_id)
273 return board;
274 };
275
276 return NULL;
277 }
278
279 static struct flash_layout *find_layout(char *id)
280 {
281 struct flash_layout *ret;
282 struct flash_layout *l;
283
284 ret = NULL;
285 for (l = layouts; l->id != NULL; l++){
286 if (strcasecmp(id, l->id) == 0) {
287 ret = l;
288 break;
289 }
290 };
291
292 return ret;
293 }
294
295 static void usage(int status)
296 {
297 FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
298 struct board_info *board;
299
300 fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
301 fprintf(stream,
302 "\n"
303 "Options:\n"
304 " -B <board> create image for the board specified with <board>\n"
305 " -c use combined kernel image\n"
306 " -e swap endianness in kernel load address and entry point\n"
307 " -E <ep> overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
308 " -L <la> overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
309 " -H <hwid> use hardware id specified with <hwid>\n"
310 " -W <hwrev> use hardware revision specified with <hwrev>\n"
311 " -w <hwveradd> use additional hardware version specified with <hwveradd>\n"
312 " -F <id> use flash layout specified with <id>\n"
313 " -k <file> read kernel image from the file <file>\n"
314 " -r <file> read rootfs image from the file <file>\n"
315 " -a <align> align the rootfs start on an <align> bytes boundary\n"
316 " -R <offset> overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
317 " -o <file> write output to the file <file>\n"
318 " -s strip padding from the end of the image\n"
319 " -j add jffs2 end-of-filesystem markers\n"
320 " -N <vendor> set image vendor to <vendor>\n"
321 " -T <version> set header version to <version>\n"
322 " -V <version> set image version to <version>\n"
323 " -v <version> set firmware version to <version>\n"
324 " -y <version> set secondary version to <version>\n"
325 " -i <file> inspect given firmware file <file>\n"
326 " -x extract kernel and rootfs while inspecting (requires -i)\n"
327 " -h show this screen\n"
328 );
329
330 exit(status);
331 }
332
333 static int get_md5(char *data, int size, char *md5)
334 {
335 MD5_CTX ctx;
336
337 MD5_Init(&ctx);
338 MD5_Update(&ctx, data, size);
339 MD5_Final(md5, &ctx);
340 }
341
342 static int get_file_stat(struct file_info *fdata)
343 {
344 struct stat st;
345 int res;
346
347 if (fdata->file_name == NULL)
348 return 0;
349
350 res = stat(fdata->file_name, &st);
351 if (res){
352 ERRS("stat failed on %s", fdata->file_name);
353 return res;
354 }
355
356 fdata->file_size = st.st_size;
357 return 0;
358 }
359
360 static int read_to_buf(struct file_info *fdata, char *buf)
361 {
362 FILE *f;
363 int ret = EXIT_FAILURE;
364
365 f = fopen(fdata->file_name, "r");
366 if (f == NULL) {
367 ERRS("could not open \"%s\" for reading", fdata->file_name);
368 goto out;
369 }
370
371 errno = 0;
372 fread(buf, fdata->file_size, 1, f);
373 if (errno != 0) {
374 ERRS("unable to read from file \"%s\"", fdata->file_name);
375 goto out_close;
376 }
377
378 ret = EXIT_SUCCESS;
379
380 out_close:
381 fclose(f);
382 out:
383 return ret;
384 }
385
386 static int check_options(void)
387 {
388 int ret;
389
390 if (inspect_info.file_name) {
391 ret = get_file_stat(&inspect_info);
392 if (ret)
393 return ret;
394
395 return 0;
396 } else if (extract) {
397 ERR("no firmware for inspection specified");
398 return -1;
399 }
400
401 if (board_id == NULL && opt_hw_id == NULL) {
402 ERR("either board or hardware id must be specified");
403 return -1;
404 }
405
406 if (board_id) {
407 board = find_board(board_id);
408 if (board == NULL) {
409 ERR("unknown/unsupported board id \"%s\"", board_id);
410 return -1;
411 }
412 if (layout_id == NULL)
413 layout_id = board->layout_id;
414
415 if (board->hdr_ver)
416 hdr_ver = board->hdr_ver;
417 } else {
418 board = &custom_board;
419
420 if (layout_id == NULL) {
421 ERR("flash layout is not specified");
422 return -1;
423 }
424
425 board->hw_id = strtoul(opt_hw_id, NULL, 0);
426
427 if (opt_hw_rev)
428 board->hw_rev = strtoul(opt_hw_rev, NULL, 0);
429 else
430 board->hw_rev = 1;
431
432 if (opt_hw_ver_add)
433 board->hw_ver_add = strtoul(opt_hw_ver_add, NULL, 0);
434 else
435 board->hw_ver_add = 0;
436 }
437
438 layout = find_layout(layout_id);
439 if (layout == NULL) {
440 ERR("unknown flash layout \"%s\"", layout_id);
441 return -1;
442 }
443
444 if (!kernel_la)
445 kernel_la = layout->kernel_la;
446 if (!kernel_ep)
447 kernel_ep = layout->kernel_ep;
448 if (!rootfs_ofs)
449 rootfs_ofs = layout->rootfs_ofs;
450
451 if (kernel_info.file_name == NULL) {
452 ERR("no kernel image specified");
453 return -1;
454 }
455
456 ret = get_file_stat(&kernel_info);
457 if (ret)
458 return ret;
459
460 kernel_len = kernel_info.file_size;
461
462 if (combined) {
463 if (kernel_info.file_size >
464 layout->fw_max_len - sizeof(struct fw_header)) {
465 ERR("kernel image is too big");
466 return -1;
467 }
468 } else {
469 if (rootfs_info.file_name == NULL) {
470 ERR("no rootfs image specified");
471 return -1;
472 }
473
474 ret = get_file_stat(&rootfs_info);
475 if (ret)
476 return ret;
477
478 if (rootfs_align) {
479 kernel_len += sizeof(struct fw_header);
480 kernel_len = ALIGN(kernel_len, rootfs_align);
481 kernel_len -= sizeof(struct fw_header);
482
483 DBG("kernel length aligned to %u", kernel_len);
484
485 if (kernel_len + rootfs_info.file_size >
486 layout->fw_max_len - sizeof(struct fw_header)) {
487 ERR("images are too big");
488 return -1;
489 }
490 } else {
491 if (kernel_info.file_size >
492 rootfs_ofs - sizeof(struct fw_header)) {
493 ERR("kernel image is too big");
494 return -1;
495 }
496
497 if (rootfs_info.file_size >
498 (layout->fw_max_len - rootfs_ofs)) {
499 ERR("rootfs image is too big");
500 return -1;
501 }
502 }
503 }
504
505 if (ofname == NULL) {
506 ERR("no output file specified");
507 return -1;
508 }
509
510 ret = sscanf(fw_ver, "%d.%d.%d", &fw_ver_hi, &fw_ver_mid, &fw_ver_lo);
511 if (ret != 3) {
512 ERR("invalid firmware version '%s'", fw_ver);
513 return -1;
514 }
515
516 ret = sscanf(sver, "%d.%d", &sver_hi, &sver_lo);
517 if (ret != 2) {
518 ERR("invalid secondary version '%s'", sver);
519 return -1;
520 }
521
522 return 0;
523 }
524
525 static void fill_header(char *buf, int len)
526 {
527 struct fw_header *hdr = (struct fw_header *)buf;
528 unsigned ver_len;
529
530 memset(hdr, '\xff', sizeof(struct fw_header));
531
532 hdr->version = htonl(bswap_32(hdr_ver));
533 ver_len = strlen(version);
534 if (ver_len > (sizeof(hdr->fw_version) - 1))
535 ver_len = sizeof(hdr->fw_version) - 1;
536
537 memcpy(hdr->fw_version, version, ver_len);
538 hdr->fw_version[ver_len] = 0;
539
540 hdr->hw_id = htonl(board->hw_id);
541 hdr->hw_rev = htonl(board->hw_rev);
542 hdr->hw_ver_add = htonl(board->hw_ver_add);
543
544 if (boot_info.file_size == 0) {
545 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
546 hdr->boot_ofs = htonl(0);
547 hdr->boot_len = htonl(0);
548 } else {
549 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
550 hdr->boot_ofs = htonl(rootfs_ofs + rootfs_info.file_size);
551 hdr->boot_len = htonl(rootfs_info.file_size);
552 }
553
554 hdr->kernel_la = htonl(kernel_la);
555 hdr->kernel_ep = htonl(kernel_ep);
556 hdr->fw_length = htonl(layout->fw_max_len);
557 hdr->kernel_ofs = htonl(sizeof(struct fw_header));
558 hdr->kernel_len = htonl(kernel_len);
559 if (!combined) {
560 hdr->rootfs_ofs = htonl(rootfs_ofs);
561 hdr->rootfs_len = htonl(rootfs_info.file_size);
562 }
563
564 hdr->boot_ofs = htonl(0);
565 hdr->boot_len = htonl(boot_info.file_size);
566
567 hdr->unk2 = htonl(0);
568 hdr->unk3 = htonl(0xffffffff);
569 hdr->unk4 = htons(0x55aa);
570 hdr->unk5 = 0xa5;
571
572 hdr->sver_hi = sver_hi;
573 hdr->sver_lo = sver_lo;
574
575 hdr->ver_hi = fw_ver_hi;
576 hdr->ver_mid = fw_ver_mid;
577 hdr->ver_lo = fw_ver_lo;
578
579 if (board->flags & FLAG_LE_KERNEL_LA_EP) {
580 hdr->kernel_la = bswap_32(hdr->kernel_la);
581 hdr->kernel_ep = bswap_32(hdr->kernel_ep);
582 }
583
584 get_md5(buf, len, hdr->md5sum1);
585 }
586
587 static int pad_jffs2(char *buf, int currlen)
588 {
589 int len;
590 uint32_t pad_mask;
591
592 len = currlen;
593 pad_mask = (64 * 1024);
594 while ((len < layout->fw_max_len) && (pad_mask != 0)) {
595 uint32_t mask;
596 int i;
597
598 for (i = 10; i < 32; i++) {
599 mask = 1 << i;
600 if (pad_mask & mask)
601 break;
602 }
603
604 len = ALIGN(len, mask);
605
606 for (i = 10; i < 32; i++) {
607 mask = 1 << i;
608 if ((len & (mask - 1)) == 0)
609 pad_mask &= ~mask;
610 }
611
612 for (i = 0; i < sizeof(jffs2_eof_mark); i++)
613 buf[len + i] = jffs2_eof_mark[i];
614
615 len += sizeof(jffs2_eof_mark);
616 }
617
618 return len;
619 }
620
621 static int write_fw(char *data, int len)
622 {
623 FILE *f;
624 int ret = EXIT_FAILURE;
625
626 f = fopen(ofname, "w");
627 if (f == NULL) {
628 ERRS("could not open \"%s\" for writing", ofname);
629 goto out;
630 }
631
632 errno = 0;
633 fwrite(data, len, 1, f);
634 if (errno) {
635 ERRS("unable to write output file");
636 goto out_flush;
637 }
638
639 DBG("firmware file \"%s\" completed", ofname);
640
641 ret = EXIT_SUCCESS;
642
643 out_flush:
644 fflush(f);
645 fclose(f);
646 if (ret != EXIT_SUCCESS) {
647 unlink(ofname);
648 }
649 out:
650 return ret;
651 }
652
653 static int build_fw(void)
654 {
655 int buflen;
656 char *buf;
657 char *p;
658 int ret = EXIT_FAILURE;
659 int writelen = 0;
660
661 buflen = layout->fw_max_len;
662
663 buf = malloc(buflen);
664 if (!buf) {
665 ERR("no memory for buffer\n");
666 goto out;
667 }
668
669 memset(buf, 0xff, buflen);
670 p = buf + sizeof(struct fw_header);
671 ret = read_to_buf(&kernel_info, p);
672 if (ret)
673 goto out_free_buf;
674
675 writelen = sizeof(struct fw_header) + kernel_len;
676
677 if (!combined) {
678 if (rootfs_align)
679 p = buf + writelen;
680 else
681 p = buf + rootfs_ofs;
682
683 ret = read_to_buf(&rootfs_info, p);
684 if (ret)
685 goto out_free_buf;
686
687 if (rootfs_align)
688 writelen += rootfs_info.file_size;
689 else
690 writelen = rootfs_ofs + rootfs_info.file_size;
691
692 if (add_jffs2_eof)
693 writelen = pad_jffs2(buf, writelen);
694 }
695
696 if (!strip_padding)
697 writelen = buflen;
698
699 fill_header(buf, writelen);
700 ret = write_fw(buf, writelen);
701 if (ret)
702 goto out_free_buf;
703
704 ret = EXIT_SUCCESS;
705
706 out_free_buf:
707 free(buf);
708 out:
709 return ret;
710 }
711
712 /* Helper functions to inspect_fw() representing different output formats */
713 static inline void inspect_fw_pstr(char *label, char *str)
714 {
715 printf("%-23s: %s\n", label, str);
716 }
717
718 static inline void inspect_fw_phex(char *label, uint32_t val)
719 {
720 printf("%-23s: 0x%08x\n", label, val);
721 }
722
723 static inline void inspect_fw_phexpost(char *label,
724 uint32_t val, char *post)
725 {
726 printf("%-23s: 0x%08x (%s)\n", label, val, post);
727 }
728
729 static inline void inspect_fw_phexdef(char *label,
730 uint32_t val, uint32_t defval)
731 {
732 printf("%-23s: 0x%08x ", label, val);
733
734 if (val == defval)
735 printf("(== OpenWrt default)\n");
736 else
737 printf("(OpenWrt default: 0x%08x)\n", defval);
738 }
739
740 static inline void inspect_fw_phexexp(char *label,
741 uint32_t val, uint32_t expval)
742 {
743 printf("%-23s: 0x%08x ", label, val);
744
745 if (val == expval)
746 printf("(ok)\n");
747 else
748 printf("(expected: 0x%08x)\n", expval);
749 }
750
751 static inline void inspect_fw_phexdec(char *label, uint32_t val)
752 {
753 printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
754 }
755
756 static inline void inspect_fw_phexdecdef(char *label,
757 uint32_t val, uint32_t defval)
758 {
759 printf("%-23s: 0x%08x / %8u bytes ", label, val, val);
760
761 if (val == defval)
762 printf("(== OpenWrt default)\n");
763 else
764 printf("(OpenWrt default: 0x%08x)\n", defval);
765 }
766
767 static inline void inspect_fw_pmd5sum(char *label, uint8_t *val, char *text)
768 {
769 int i;
770
771 printf("%-23s:", label);
772 for (i=0; i<MD5SUM_LEN; i++)
773 printf(" %02x", val[i]);
774 printf(" %s\n", text);
775 }
776
777 static int inspect_fw(void)
778 {
779 char *buf;
780 struct fw_header *hdr;
781 uint8_t md5sum[MD5SUM_LEN];
782 struct board_info *board;
783 int ret = EXIT_FAILURE;
784
785 buf = malloc(inspect_info.file_size);
786 if (!buf) {
787 ERR("no memory for buffer!\n");
788 goto out;
789 }
790
791 ret = read_to_buf(&inspect_info, buf);
792 if (ret)
793 goto out_free_buf;
794 hdr = (struct fw_header *)buf;
795
796 inspect_fw_pstr("File name", inspect_info.file_name);
797 inspect_fw_phexdec("File size", inspect_info.file_size);
798
799 switch(bswap_32(ntohl(hdr->version))) {
800 case 2:
801 case 3:
802 break;
803 default:
804 ERR("file does not seem to have V2/V3 header!\n");
805 goto out_free_buf;
806 }
807
808 inspect_fw_phexdec("Version 2 Header size", sizeof(struct fw_header));
809
810 memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
811 if (ntohl(hdr->boot_len) == 0)
812 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
813 else
814 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
815 get_md5(buf, inspect_info.file_size, hdr->md5sum1);
816
817 if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
818 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
819 inspect_fw_pmd5sum(" --> expected", hdr->md5sum1, "");
820 } else {
821 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
822 }
823 if (ntohl(hdr->unk2) != 0)
824 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
825 inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
826 "(purpose yet unknown, unchecked here)");
827
828 if (ntohl(hdr->unk3) != 0xffffffff)
829 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
830
831 if (ntohs(hdr->unk4) != 0x55aa)
832 inspect_fw_phexdec("Unknown value 4", hdr->unk4);
833
834 if (hdr->unk5 != 0xa5)
835 inspect_fw_phexdec("Unknown value 5", hdr->unk5);
836
837 printf("\n");
838
839 inspect_fw_pstr("Firmware version", hdr->fw_version);
840
841 board = find_board_by_hwid(ntohl(hdr->hw_id));
842 if (board) {
843 layout = find_layout(board->layout_id);
844 inspect_fw_phexpost("Hardware ID",
845 ntohl(hdr->hw_id), board->id);
846 inspect_fw_phexexp("Hardware Revision",
847 ntohl(hdr->hw_rev), board->hw_rev);
848 inspect_fw_phexexp("Additional HW Version",
849 ntohl(hdr->hw_ver_add), board->hw_ver_add);
850 } else {
851 inspect_fw_phexpost("Hardware ID",
852 ntohl(hdr->hw_id), "unknown");
853 inspect_fw_phex("Hardware Revision",
854 ntohl(hdr->hw_rev));
855 inspect_fw_phex("Additional HW Version",
856 ntohl(hdr->hw_ver_add));
857 }
858
859 printf("%-23s: %d.%d.%d-%d.%d\n", "Software version",
860 hdr->ver_hi, hdr->ver_mid, hdr->ver_lo,
861 hdr->sver_hi, hdr->sver_lo);
862
863 printf("\n");
864
865 inspect_fw_phexdec("Kernel data offset",
866 ntohl(hdr->kernel_ofs));
867 inspect_fw_phexdec("Kernel data length",
868 ntohl(hdr->kernel_len));
869 if (board) {
870 inspect_fw_phexdef("Kernel load address",
871 ntohl(hdr->kernel_la),
872 layout ? layout->kernel_la : 0xffffffff);
873 inspect_fw_phexdef("Kernel entry point",
874 ntohl(hdr->kernel_ep),
875 layout ? layout->kernel_ep : 0xffffffff);
876 inspect_fw_phexdecdef("Rootfs data offset",
877 ntohl(hdr->rootfs_ofs),
878 layout ? layout->rootfs_ofs : 0xffffffff);
879 } else {
880 inspect_fw_phex("Kernel load address",
881 ntohl(hdr->kernel_la));
882 inspect_fw_phex("Kernel entry point",
883 ntohl(hdr->kernel_ep));
884 inspect_fw_phexdec("Rootfs data offset",
885 ntohl(hdr->rootfs_ofs));
886 }
887 inspect_fw_phexdec("Rootfs data length",
888 ntohl(hdr->rootfs_len));
889 inspect_fw_phexdec("Boot loader data offset",
890 ntohl(hdr->boot_ofs));
891 inspect_fw_phexdec("Boot loader data length",
892 ntohl(hdr->boot_len));
893 inspect_fw_phexdec("Total firmware length",
894 ntohl(hdr->fw_length));
895
896 if (extract) {
897 FILE *fp;
898 char *filename;
899
900 printf("\n");
901
902 filename = malloc(strlen(inspect_info.file_name) + 8);
903 sprintf(filename, "%s-kernel", inspect_info.file_name);
904 printf("Extracting kernel to \"%s\"...\n", filename);
905 fp = fopen(filename, "w");
906 if (fp) {
907 if (!fwrite(buf + ntohl(hdr->kernel_ofs),
908 ntohl(hdr->kernel_len), 1, fp)) {
909 ERR("error in fwrite(): %s", strerror(errno));
910 }
911 fclose(fp);
912 } else {
913 ERR("error in fopen(): %s", strerror(errno));
914 }
915 free(filename);
916
917 filename = malloc(strlen(inspect_info.file_name) + 8);
918 sprintf(filename, "%s-rootfs", inspect_info.file_name);
919 printf("Extracting rootfs to \"%s\"...\n", filename);
920 fp = fopen(filename, "w");
921 if (fp) {
922 if (!fwrite(buf + ntohl(hdr->rootfs_ofs),
923 ntohl(hdr->rootfs_len), 1, fp)) {
924 ERR("error in fwrite(): %s", strerror(errno));
925 }
926 fclose(fp);
927 } else {
928 ERR("error in fopen(): %s", strerror(errno));
929 }
930 free(filename);
931 }
932
933 out_free_buf:
934 free(buf);
935 out:
936 return ret;
937 }
938
939 int main(int argc, char *argv[])
940 {
941 int ret = EXIT_FAILURE;
942 int err;
943
944 FILE *outfile;
945
946 progname = basename(argv[0]);
947
948 while ( 1 ) {
949 int c;
950
951 c = getopt(argc, argv, "a:B:H:E:F:L:V:N:W:w:ci:k:r:R:o:xhsjv:y:T:e");
952 if (c == -1)
953 break;
954
955 switch (c) {
956 case 'a':
957 sscanf(optarg, "0x%x", &rootfs_align);
958 break;
959 case 'B':
960 board_id = optarg;
961 break;
962 case 'H':
963 opt_hw_id = optarg;
964 break;
965 case 'E':
966 sscanf(optarg, "0x%x", &kernel_ep);
967 break;
968 case 'F':
969 layout_id = optarg;
970 break;
971 case 'W':
972 opt_hw_rev = optarg;
973 break;
974 case 'w':
975 opt_hw_ver_add = optarg;
976 break;
977 case 'L':
978 sscanf(optarg, "0x%x", &kernel_la);
979 break;
980 case 'V':
981 version = optarg;
982 break;
983 case 'v':
984 fw_ver = optarg;
985 break;
986 case 'y':
987 sver = optarg;
988 break;
989 case 'N':
990 vendor = optarg;
991 break;
992 case 'c':
993 combined++;
994 break;
995 case 'k':
996 kernel_info.file_name = optarg;
997 break;
998 case 'r':
999 rootfs_info.file_name = optarg;
1000 break;
1001 case 'R':
1002 sscanf(optarg, "0x%x", &rootfs_ofs);
1003 break;
1004 case 'o':
1005 ofname = optarg;
1006 break;
1007 case 's':
1008 strip_padding = 1;
1009 break;
1010 case 'i':
1011 inspect_info.file_name = optarg;
1012 break;
1013 case 'j':
1014 add_jffs2_eof = 1;
1015 break;
1016 case 'x':
1017 extract = 1;
1018 break;
1019 case 'T':
1020 hdr_ver = atoi(optarg);
1021 break;
1022 case 'e':
1023 custom_board.flags = FLAG_LE_KERNEL_LA_EP;
1024 break;
1025 case 'h':
1026 usage(EXIT_SUCCESS);
1027 break;
1028 default:
1029 usage(EXIT_FAILURE);
1030 break;
1031 }
1032 }
1033
1034 ret = check_options();
1035 if (ret)
1036 goto out;
1037
1038 if (!inspect_info.file_name)
1039 ret = build_fw();
1040 else
1041 ret = inspect_fw();
1042
1043 out:
1044 return ret;
1045 }
1046
OpenWrt Source Repository