tools/firmware-utils/src/mktplinkfw.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 <sys/stat.h>
  24
  25 #include <arpa/inet.h>
  26 #include <netinet/in.h>
  27
  28 #include "md5.h"
  29
  30 #define HEADER_VERSION_V1       0x01000000
  31 #define HWID_TL_MR3220_V1       0x32200001
  32 #define HWID_TL_MR3420_V1       0x34200001
  33 #define HWID_TL_WA901ND_V1      0x09010001
  34 #define HWID_TL_WA901ND_V2      0x09010002
  35 #define HWID_TL_WR703N_V1       0x07030101
  36 #define HWID_TL_WR741ND_V1      0x07410001
  37 #define HWID_TL_WR741ND_V4      0x07410004
  38 #define HWID_TL_WR740N_V1       0x07400001
  39 #define HWID_TL_WR740N_V3       0x07400003
  40 #define HWID_TL_WR743ND_V1      0x07430001
  41 #define HWID_TL_WR841N_V1_5     0x08410002
  42 #define HWID_TL_WR841ND_V3      0x08410003
  43 #define HWID_TL_WR841ND_V5      0x08410005
  44 #define HWID_TL_WR841ND_V7      0x08410007
  45 #define HWID_TL_WR941ND_V2      0x09410002
  46 #define HWID_TL_WR941ND_V4      0x09410004
  47 #define HWID_TL_WR1043ND_V1     0x10430001
  48
  49 #define MD5SUM_LEN      16
  50
  51 struct file_info {
  52         char            *file_name;     /* name of the file */
  53         uint32_t        file_size;      /* length of the file */
  54 };
  55
  56 struct fw_header {
  57         uint32_t        version;        /* header version */
  58         char            vendor_name[24];
  59         char            fw_version[36];
  60         uint32_t        hw_id;          /* hardware id */
  61         uint32_t        hw_rev;         /* hardware revision */
  62         uint32_t        unk1;
  63         uint8_t         md5sum1[MD5SUM_LEN];
  64         uint32_t        unk2;
  65         uint8_t         md5sum2[MD5SUM_LEN];
  66         uint32_t        unk3;
  67         uint32_t        kernel_la;      /* kernel load address */
  68         uint32_t        kernel_ep;      /* kernel entry point */
  69         uint32_t        fw_length;      /* total length of the firmware */
  70         uint32_t        kernel_ofs;     /* kernel data offset */
  71         uint32_t        kernel_len;     /* kernel data length */
  72         uint32_t        rootfs_ofs;     /* rootfs data offset */
  73         uint32_t        rootfs_len;     /* rootfs data length */
  74         uint32_t        boot_ofs;       /* bootloader data offset */
  75         uint32_t        boot_len;       /* bootloader data length */
  76         uint8_t         pad[360];
  77 } __attribute__ ((packed));
  78
  79 struct board_info {
  80         char            *id;
  81         uint32_t        hw_id;
  82         uint32_t        hw_rev;
  83         uint32_t        fw_max_len;
  84         uint32_t        kernel_la;
  85         uint32_t        kernel_ep;
  86         uint32_t        rootfs_ofs;
  87 };
  88
  89 /*
  90  * Globals
  91  */
  92 static char *ofname;
  93 static char *progname;
  94 static char *vendor = "TP-LINK Technologies";
  95 static char *version = "ver. 1.0";
  96
  97 static char *board_id;
  98 static struct board_info *board;
  99 static struct file_info kernel_info;
 100 static uint32_t kernel_la = 0;
 101 static uint32_t kernel_ep = 0;
 102 static struct file_info rootfs_info;
 103 static uint32_t rootfs_ofs = 0;
 104 static struct file_info boot_info;
 105 static int combined;
 106 static int strip_padding;
 107
 108 static struct file_info inspect_info;
 109 static int extract = 0;
 110
 111 char md5salt_normal[MD5SUM_LEN] = {
 112         0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
 113         0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
 114 };
 115
 116 char md5salt_boot[MD5SUM_LEN] = {
 117         0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
 118         0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
 119 };
 120
 121 static struct board_info boards[] = {
 122         {
 123                 .id             = "TL-MR3220v1",
 124                 .hw_id          = HWID_TL_MR3220_V1,
 125                 .hw_rev         = 1,
 126                 .fw_max_len     = 0x3c0000,
 127                 .kernel_la      = 0x80060000,
 128                 .kernel_ep      = 0x80060000,
 129                 .rootfs_ofs     = 0x140000,
 130         }, {
 131                 .id             = "TL-MR3420v1",
 132                 .hw_id          = HWID_TL_MR3420_V1,
 133                 .hw_rev         = 1,
 134                 .fw_max_len     = 0x3c0000,
 135                 .kernel_la      = 0x80060000,
 136                 .kernel_ep      = 0x80060000,
 137                 .rootfs_ofs     = 0x140000,
 138         }, {
 139                 .id             = "TL-WA901NDv1",
 140                 .hw_id          = HWID_TL_WA901ND_V1,
 141                 .hw_rev         = 1,
 142                 .fw_max_len     = 0x3c0000,
 143                 .kernel_la      = 0x80060000,
 144                 .kernel_ep      = 0x80060000,
 145                 .rootfs_ofs     = 0x140000,
 146         }, {
 147                 .id             = "TL-WA901NDv2",
 148                 .hw_id          = HWID_TL_WA901ND_V2,
 149                 .hw_rev         = 1,
 150                 .fw_max_len     = 0x3c0000,
 151                 .kernel_la      = 0x80060000,
 152                 .kernel_ep      = 0x80060000,
 153                 .rootfs_ofs     = 0x140000,
 154         }, {
 155                 .id             = "TL-WR741NDv1",
 156                 .hw_id          = HWID_TL_WR741ND_V1,
 157                 .hw_rev         = 1,
 158                 .fw_max_len     = 0x3c0000,
 159                 .kernel_la      = 0x80060000,
 160                 .kernel_ep      = 0x80060000,
 161                 .rootfs_ofs     = 0x140000,
 162         }, {
 163                 .id             = "TL-WR741NDv4",
 164                 .hw_id          = HWID_TL_WR741ND_V4,
 165                 .hw_rev         = 1,
 166                 .fw_max_len     = 0x3c0000,
 167                 .kernel_la      = 0x80060000,
 168                 .kernel_ep      = 0x80060000,
 169                 .rootfs_ofs     = 0x100000,
 170         }, {
 171                 .id             = "TL-WR740Nv1",
 172                 .hw_id          = HWID_TL_WR740N_V1,
 173                 .hw_rev         = 1,
 174                 .fw_max_len     = 0x3c0000,
 175                 .kernel_la      = 0x80060000,
 176                 .kernel_ep      = 0x80060000,
 177                 .rootfs_ofs     = 0x140000,
 178         }, {
 179                 .id             = "TL-WR740Nv3",
 180                 .hw_id          = HWID_TL_WR740N_V3,
 181                 .hw_rev         = 1,
 182                 .fw_max_len     = 0x3c0000,
 183                 .kernel_la      = 0x80060000,
 184                 .kernel_ep      = 0x80060000,
 185                 .rootfs_ofs     = 0x140000,
 186         }, {
 187                 .id             = "TL-WR743NDv1",
 188                 .hw_id          = HWID_TL_WR743ND_V1,
 189                 .hw_rev         = 1,
 190                 .fw_max_len     = 0x3c0000,
 191                 .kernel_la      = 0x80060000,
 192                 .kernel_ep      = 0x80060000,
 193                 .rootfs_ofs     = 0x140000,
 194         }, {
 195                 .id             = "TL-WR841Nv1.5",
 196                 .hw_id          = HWID_TL_WR841N_V1_5,
 197                 .hw_rev         = 2,
 198                 .fw_max_len     = 0x3c0000,
 199                 .kernel_la      = 0x80060000,
 200                 .kernel_ep      = 0x80060000,
 201                 .rootfs_ofs     = 0x140000,
 202         }, {
 203                 .id             = "TL-WR841NDv3",
 204                 .hw_id          = HWID_TL_WR841ND_V3,
 205                 .hw_rev         = 3,
 206                 .fw_max_len     = 0x3c0000,
 207                 .kernel_la      = 0x80060000,
 208                 .kernel_ep      = 0x80060000,
 209                 .rootfs_ofs     = 0x140000,
 210         }, {
 211                 .id             = "TL-WR841NDv5",
 212                 .hw_id          = HWID_TL_WR841ND_V5,
 213                 .hw_rev         = 1,
 214                 .fw_max_len     = 0x3c0000,
 215                 .kernel_la      = 0x80060000,
 216                 .kernel_ep      = 0x80060000,
 217                 .rootfs_ofs     = 0x140000,
 218         }, {
 219                 .id             = "TL-WR841NDv7",
 220                 .hw_id          = HWID_TL_WR841ND_V7,
 221                 .hw_rev         = 1,
 222                 .fw_max_len     = 0x3c0000,
 223                 .kernel_la      = 0x80060000,
 224                 .kernel_ep      = 0x80060000,
 225                 .rootfs_ofs     = 0x140000,
 226         }, {
 227                 .id             = "TL-WR941NDv2",
 228                 .hw_id          = HWID_TL_WR941ND_V2,
 229                 .hw_rev         = 2,
 230                 .fw_max_len     = 0x3c0000,
 231                 .kernel_la      = 0x80060000,
 232                 .kernel_ep      = 0x80060000,
 233                 .rootfs_ofs     = 0x140000,
 234         }, {
 235                 .id             = "TL-WR941NDv4",
 236                 .hw_id          = HWID_TL_WR941ND_V4,
 237                 .hw_rev         = 1,
 238                 .fw_max_len     = 0x3c0000,
 239                 .kernel_la      = 0x80060000,
 240                 .kernel_ep      = 0x80060000,
 241                 .rootfs_ofs     = 0x140000,
 242         }, {
 243                 .id             = "TL-WR1043NDv1",
 244                 .hw_id          = HWID_TL_WR1043ND_V1,
 245                 .hw_rev         = 1,
 246                 .fw_max_len     = 0x7c0000,
 247                 .kernel_la      = 0x80060000,
 248                 .kernel_ep      = 0x80060000,
 249                 .rootfs_ofs     = 0x140000,
 250         }, {
 251                 .id             = "TL-WR703Nv1",
 252                 .hw_id          = HWID_TL_WR703N_V1,
 253                 .hw_rev         = 1,
 254                 .fw_max_len     = 0x3c0000,
 255                 .kernel_la      = 0x80060000,
 256                 .kernel_ep      = 0x80060000,
 257                 .rootfs_ofs     = 0x100000,
 258         }, {
 259                 /* terminating entry */
 260         }
 261 };
 262
 263 /*
 264  * Message macros
 265  */
 266 #define ERR(fmt, ...) do { \
 267         fflush(0); \
 268         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 269                         progname, ## __VA_ARGS__ ); \
 270 } while (0)
 271
 272 #define ERRS(fmt, ...) do { \
 273         int save = errno; \
 274         fflush(0); \
 275         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 276                         progname, ## __VA_ARGS__, strerror(save)); \
 277 } while (0)
 278
 279 #define DBG(fmt, ...) do { \
 280         fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
 281 } while (0)
 282
 283 static struct board_info *find_board(char *id)
 284 {
 285         struct board_info *ret;
 286         struct board_info *board;
 287
 288         ret = NULL;
 289         for (board = boards; board->id != NULL; board++){
 290                 if (strcasecmp(id, board->id) == 0) {
 291                         ret = board;
 292                         break;
 293                 }
 294         };
 295
 296         return ret;
 297 }
 298
 299 static struct board_info *find_board_by_hwid(uint32_t hw_id)
 300 {
 301         struct board_info *board;
 302
 303         for (board = boards; board->id != NULL; board++) {
 304                 if (hw_id == board->hw_id)
 305                         return board;
 306         };
 307
 308         return NULL;
 309 }
 310
 311
 312 static void usage(int status)
 313 {
 314         FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
 315         struct board_info *board;
 316
 317         fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
 318         fprintf(stream,
 319 "\n"
 320 "Options:\n"
 321 "  -B <board>      create image for the board specified with <board>\n"
 322 "  -c              use combined kernel image\n"
 323 "  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
 324 "  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
 325 "  -k <file>       read kernel image from the file <file>\n"
 326 "  -r <file>       read rootfs image from the file <file>\n"
 327 "  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
 328 "  -o <file>       write output to the file <file>\n"
 329 "  -s              strip padding from the end of the image\n"
 330 "  -N <vendor>     set image vendor to <vendor>\n"
 331 "  -V <version>    set image version to <version>\n"
 332 "  -i <file>       inspect given firmware file <file>\n"
 333 "  -x              extract kernel and rootfs while inspecting (requires -i)\n"
 334 "  -h              show this screen\n"
 335         );
 336
 337         exit(status);
 338 }
 339
 340 static int get_md5(char *data, int size, char *md5)
 341 {
 342         MD5_CTX ctx;
 343
 344         MD5_Init(&ctx);
 345         MD5_Update(&ctx, data, size);
 346         MD5_Final(md5, &ctx);
 347 }
 348
 349 static int get_file_stat(struct file_info *fdata)
 350 {
 351         struct stat st;
 352         int res;
 353
 354         if (fdata->file_name == NULL)
 355                 return 0;
 356
 357         res = stat(fdata->file_name, &st);
 358         if (res){
 359                 ERRS("stat failed on %s", fdata->file_name);
 360                 return res;
 361         }
 362
 363         fdata->file_size = st.st_size;
 364         return 0;
 365 }
 366
 367 static int read_to_buf(struct file_info *fdata, char *buf)
 368 {
 369         FILE *f;
 370         int ret = EXIT_FAILURE;
 371
 372         f = fopen(fdata->file_name, "r");
 373         if (f == NULL) {
 374                 ERRS("could not open \"%s\" for reading", fdata->file_name);
 375                 goto out;
 376         }
 377
 378         errno = 0;
 379         fread(buf, fdata->file_size, 1, f);
 380         if (errno != 0) {
 381                 ERRS("unable to read from file \"%s\"", fdata->file_name);
 382                 goto out_close;
 383         }
 384
 385         ret = EXIT_SUCCESS;
 386
 387  out_close:
 388         fclose(f);
 389  out:
 390         return ret;
 391 }
 392
 393 static int check_options(void)
 394 {
 395         int ret;
 396
 397         if (inspect_info.file_name) {
 398                 ret = get_file_stat(&inspect_info);
 399                 if (ret)
 400                         return ret;
 401
 402                 return 0;
 403         } else if (extract) {
 404                 ERR("no firmware for inspection specified");
 405                 return -1;
 406         }
 407
 408         if (board_id == NULL) {
 409                 ERR("no board specified");
 410                 return -1;
 411         }
 412
 413         board = find_board(board_id);
 414         if (board == NULL) {
 415                 ERR("unknown/unsupported board id \"%s\"", board_id);
 416                 return -1;
 417         }
 418         if (!kernel_la)
 419                 kernel_la = board->kernel_la;
 420         if (!kernel_ep)
 421                 kernel_ep = board->kernel_ep;
 422         if (!rootfs_ofs)
 423                 rootfs_ofs = board->rootfs_ofs;
 424
 425         if (kernel_info.file_name == NULL) {
 426                 ERR("no kernel image specified");
 427                 return -1;
 428         }
 429
 430         ret = get_file_stat(&kernel_info);
 431         if (ret)
 432                 return ret;
 433
 434         if (combined) {
 435                 if (kernel_info.file_size >
 436                     board->fw_max_len - sizeof(struct fw_header)) {
 437                         ERR("kernel image is too big");
 438                         return -1;
 439                 }
 440         } else {
 441                 if (kernel_info.file_size >
 442                     rootfs_ofs - sizeof(struct fw_header)) {
 443                         ERR("kernel image is too big");
 444                         return -1;
 445                 }
 446                 if (rootfs_info.file_name == NULL) {
 447                         ERR("no rootfs image specified");
 448                         return -1;
 449                 }
 450
 451                 ret = get_file_stat(&rootfs_info);
 452                 if (ret)
 453                         return ret;
 454
 455                 if (rootfs_info.file_size >
 456                     (board->fw_max_len - rootfs_ofs)) {
 457                         ERR("rootfs image is too big");
 458                         return -1;
 459                 }
 460         }
 461
 462         if (ofname == NULL) {
 463                 ERR("no output file specified");
 464                 return -1;
 465         }
 466
 467         return 0;
 468 }
 469
 470 static void fill_header(char *buf, int len)
 471 {
 472         struct fw_header *hdr = (struct fw_header *)buf;
 473
 474         memset(hdr, 0, sizeof(struct fw_header));
 475
 476         hdr->version = htonl(HEADER_VERSION_V1);
 477         strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
 478         strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
 479         hdr->hw_id = htonl(board->hw_id);
 480         hdr->hw_rev = htonl(board->hw_rev);
 481
 482         if (boot_info.file_size == 0)
 483                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
 484         else
 485                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
 486
 487         hdr->kernel_la = htonl(kernel_la);
 488         hdr->kernel_ep = htonl(kernel_ep);
 489         hdr->fw_length = htonl(board->fw_max_len);
 490         hdr->kernel_ofs = htonl(sizeof(struct fw_header));
 491         hdr->kernel_len = htonl(kernel_info.file_size);
 492         if (!combined) {
 493                 hdr->rootfs_ofs = htonl(rootfs_ofs);
 494                 hdr->rootfs_len = htonl(rootfs_info.file_size);
 495         }
 496
 497         get_md5(buf, len, hdr->md5sum1);
 498 }
 499
 500 static int write_fw(char *data, int len)
 501 {
 502         FILE *f;
 503         int ret = EXIT_FAILURE;
 504
 505         f = fopen(ofname, "w");
 506         if (f == NULL) {
 507                 ERRS("could not open \"%s\" for writing", ofname);
 508                 goto out;
 509         }
 510
 511         errno = 0;
 512         fwrite(data, len, 1, f);
 513         if (errno) {
 514                 ERRS("unable to write output file");
 515                 goto out_flush;
 516         }
 517
 518         DBG("firmware file \"%s\" completed", ofname);
 519
 520         ret = EXIT_SUCCESS;
 521
 522  out_flush:
 523         fflush(f);
 524         fclose(f);
 525         if (ret != EXIT_SUCCESS) {
 526                 unlink(ofname);
 527         }
 528  out:
 529         return ret;
 530 }
 531
 532 static int build_fw(void)
 533 {
 534         int buflen;
 535         char *buf;
 536         char *p;
 537         int ret = EXIT_FAILURE;
 538         int writelen = 0;
 539
 540         buflen = board->fw_max_len;
 541
 542         buf = malloc(buflen);
 543         if (!buf) {
 544                 ERR("no memory for buffer\n");
 545                 goto out;
 546         }
 547
 548         memset(buf, 0xff, buflen);
 549         p = buf + sizeof(struct fw_header);
 550         ret = read_to_buf(&kernel_info, p);
 551         if (ret)
 552                 goto out_free_buf;
 553
 554         writelen = kernel_info.file_size;
 555
 556         if (!combined) {
 557                 p = buf + rootfs_ofs;
 558                 ret = read_to_buf(&rootfs_info, p);
 559                 if (ret)
 560                         goto out_free_buf;
 561
 562                 writelen = rootfs_ofs + rootfs_info.file_size;
 563         }
 564
 565         if (!strip_padding)
 566                 writelen = buflen;
 567
 568         fill_header(buf, writelen);
 569         ret = write_fw(buf, writelen);
 570         if (ret)
 571                 goto out_free_buf;
 572
 573         ret = EXIT_SUCCESS;
 574
 575  out_free_buf:
 576         free(buf);
 577  out:
 578         return ret;
 579 }
 580
 581 /* Helper functions to inspect_fw() representing different output formats */
 582 static inline void inspect_fw_pstr(char *label, char *str)
 583 {
 584         printf("%-23s: %s\n", label, str);
 585 }
 586
 587 static inline void inspect_fw_phex(char *label, uint32_t val)
 588 {
 589         printf("%-23s: 0x%08x\n", label, val);
 590 }
 591
 592 static inline void inspect_fw_phexpost(char *label,
 593                                        uint32_t val, char *post)
 594 {
 595         printf("%-23s: 0x%08x (%s)\n", label, val, post);
 596 }
 597
 598 static inline void inspect_fw_phexdef(char *label,
 599                                       uint32_t val, uint32_t defval)
 600 {
 601         printf("%-23s: 0x%08x                  ", label, val);
 602
 603         if (val == defval)
 604                 printf("(== OpenWrt default)\n");
 605         else
 606                 printf("(OpenWrt default: 0x%08x)\n", defval);
 607 }
 608
 609 static inline void inspect_fw_phexexp(char *label,
 610                                       uint32_t val, uint32_t expval)
 611 {
 612         printf("%-23s: 0x%08x ", label, val);
 613
 614         if (val == expval)
 615                 printf("(ok)\n");
 616         else
 617                 printf("(expected: 0x%08x)\n", expval);
 618 }
 619
 620 static inline void inspect_fw_phexdec(char *label, uint32_t val)
 621 {
 622         printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
 623 }
 624
 625 static inline void inspect_fw_phexdecdef(char *label,
 626                                          uint32_t val, uint32_t defval)
 627 {
 628         printf("%-23s: 0x%08x / %8u bytes ", label, val, val);
 629
 630         if (val == defval)
 631                 printf("(== OpenWrt default)\n");
 632         else
 633                 printf("(OpenWrt default: 0x%08x)\n", defval);
 634 }
 635
 636 static inline void inspect_fw_pmd5sum(char *label, uint8_t *val, char *text)
 637 {
 638         int i;
 639
 640         printf("%-23s:", label);
 641         for (i=0; i<MD5SUM_LEN; i++)
 642                 printf(" %02x", val[i]);
 643         printf(" %s\n", text);
 644 }
 645
 646 static int inspect_fw(void)
 647 {
 648         char *buf;
 649         struct fw_header *hdr;
 650         uint8_t md5sum[MD5SUM_LEN];
 651         struct board_info *board;
 652         int ret = EXIT_FAILURE;
 653
 654         buf = malloc(inspect_info.file_size);
 655         if (!buf) {
 656                 ERR("no memory for buffer!\n");
 657                 goto out;
 658         }
 659
 660         ret = read_to_buf(&inspect_info, buf);
 661         if (ret)
 662                 goto out_free_buf;
 663         hdr = (struct fw_header *)buf;
 664
 665         inspect_fw_pstr("File name", inspect_info.file_name);
 666         inspect_fw_phexdec("File size", inspect_info.file_size);
 667
 668         if (ntohl(hdr->version) != HEADER_VERSION_V1) {
 669                 ERR("file does not seem to have V1 header!\n");
 670                 goto out_free_buf;
 671         }
 672
 673         inspect_fw_phexdec("Version 1 Header size", sizeof(struct fw_header));
 674
 675         if (ntohl(hdr->unk1) != 0)
 676                 inspect_fw_phexdec("Unknown value 1", hdr->unk1);
 677
 678         memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
 679         if (ntohl(hdr->boot_len) == 0)
 680                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
 681         else
 682                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
 683         get_md5(buf, inspect_info.file_size, hdr->md5sum1);
 684
 685         if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
 686                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
 687                 inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
 688         } else {
 689                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
 690         }
 691         if (ntohl(hdr->unk2) != 0)
 692                 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
 693         inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
 694                            "(purpose yet unknown, unchecked here)");
 695         if (ntohl(hdr->unk3) != 0)
 696                 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
 697
 698         printf("\n");
 699
 700         inspect_fw_pstr("Vendor name", hdr->vendor_name);
 701         inspect_fw_pstr("Firmware version", hdr->fw_version);
 702         board = find_board_by_hwid(ntohl(hdr->hw_id));
 703         if (board) {
 704                 inspect_fw_phexpost("Hardware ID",
 705                                     ntohl(hdr->hw_id), board->id);
 706                 inspect_fw_phexexp("Hardware Revision",
 707                                    ntohl(hdr->hw_rev), board->hw_rev);
 708         } else {
 709                 inspect_fw_phexpost("Hardware ID",
 710                                     ntohl(hdr->hw_id), "unknown");
 711                 inspect_fw_phex("Hardware Revision",
 712                                 ntohl(hdr->hw_rev));
 713         }
 714
 715         printf("\n");
 716
 717         inspect_fw_phexdec("Kernel data offset",
 718                            ntohl(hdr->kernel_ofs));
 719         inspect_fw_phexdec("Kernel data length",
 720                            ntohl(hdr->kernel_len));
 721         if (board) {
 722                 inspect_fw_phexdef("Kernel load address",
 723                                    ntohl(hdr->kernel_la),
 724                                    board->kernel_la);
 725                 inspect_fw_phexdef("Kernel entry point",
 726                                    ntohl(hdr->kernel_ep),
 727                                    board->kernel_ep);
 728                 inspect_fw_phexdecdef("Rootfs data offset",
 729                                       ntohl(hdr->rootfs_ofs),
 730                                       board->rootfs_ofs);
 731         } else {
 732                 inspect_fw_phex("Kernel load address",
 733                                 ntohl(hdr->kernel_la));
 734                 inspect_fw_phex("Kernel entry point",
 735                                 ntohl(hdr->kernel_ep));
 736                 inspect_fw_phexdec("Rootfs data offset",
 737                                    ntohl(hdr->rootfs_ofs));
 738         }
 739         inspect_fw_phexdec("Rootfs data length",
 740                            ntohl(hdr->rootfs_len));
 741         inspect_fw_phexdec("Boot loader data offset",
 742                            ntohl(hdr->boot_ofs));
 743         inspect_fw_phexdec("Boot loader data length",
 744                            ntohl(hdr->boot_len));
 745         inspect_fw_phexdec("Total firmware length",
 746                            ntohl(hdr->fw_length));
 747
 748         if (extract) {
 749                 FILE *fp;
 750                 char *filename;
 751
 752                 printf("\n");
 753
 754                 filename = malloc(strlen(inspect_info.file_name) + 8);
 755                 sprintf(filename, "%s-kernel", inspect_info.file_name);
 756                 printf("Extracting kernel to \"%s\"...\n", filename);
 757                 fp = fopen(filename, "w");
 758                 if (fp) {
 759                         if (!fwrite(buf + ntohl(hdr->kernel_ofs),
 760                                     ntohl(hdr->kernel_len), 1, fp)) {
 761                                 ERR("error in fwrite(): %s", strerror(errno));
 762                         }
 763                         fclose(fp);
 764                 } else {
 765                         ERR("error in fopen(): %s", strerror(errno));
 766                 }
 767                 free(filename);
 768
 769                 filename = malloc(strlen(inspect_info.file_name) + 8);
 770                 sprintf(filename, "%s-rootfs", inspect_info.file_name);
 771                 printf("Extracting rootfs to \"%s\"...\n", filename);
 772                 fp = fopen(filename, "w");
 773                 if (fp) {
 774                         if (!fwrite(buf + ntohl(hdr->rootfs_ofs),
 775                                     ntohl(hdr->rootfs_len), 1, fp)) {
 776                                 ERR("error in fwrite(): %s", strerror(errno));
 777                         }
 778                         fclose(fp);
 779                 } else {
 780                         ERR("error in fopen(): %s", strerror(errno));
 781                 }
 782                 free(filename);
 783         }
 784
 785  out_free_buf:
 786         free(buf);
 787  out:
 788         return ret;
 789 }
 790
 791 int main(int argc, char *argv[])
 792 {
 793         int ret = EXIT_FAILURE;
 794         int err;
 795
 796         FILE *outfile;
 797
 798         progname = basename(argv[0]);
 799
 800         while ( 1 ) {
 801                 int c;
 802
 803                 c = getopt(argc, argv, "B:E:L:V:N:ci:k:r:R:o:xhs");
 804                 if (c == -1)
 805                         break;
 806
 807                 switch (c) {
 808                 case 'B':
 809                         board_id = optarg;
 810                         break;
 811                 case 'E':
 812                         sscanf(optarg, "0x%x", &kernel_ep);
 813                         break;
 814                 case 'L':
 815                         sscanf(optarg, "0x%x", &kernel_la);
 816                         break;
 817                 case 'V':
 818                         version = optarg;
 819                         break;
 820                 case 'N':
 821                         vendor = optarg;
 822                         break;
 823                 case 'c':
 824                         combined++;
 825                         break;
 826                 case 'k':
 827                         kernel_info.file_name = optarg;
 828                         break;
 829                 case 'r':
 830                         rootfs_info.file_name = optarg;
 831                         break;
 832                 case 'R':
 833                         sscanf(optarg, "0x%x", &rootfs_ofs);
 834                         break;
 835                 case 'o':
 836                         ofname = optarg;
 837                         break;
 838                 case 's':
 839                         strip_padding = 1;
 840                         break;
 841                 case 'i':
 842                         inspect_info.file_name = optarg;
 843                         break;
 844                 case 'x':
 845                         extract = 1;
 846                         break;
 847                 case 'h':
 848                         usage(EXIT_SUCCESS);
 849                         break;
 850                 default:
 851                         usage(EXIT_FAILURE);
 852                         break;
 853                 }
 854         }
 855
 856         ret = check_options();
 857         if (ret)
 858                 goto out;
 859
 860         if (!inspect_info.file_name)
 861                 ret = build_fw();
 862         else
 863                 ret = inspect_fw();
 864
 865  out:
 866         return ret;
 867 }
 868