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 "md5.h"
  26
  27 #if (__BYTE_ORDER == __BIG_ENDIAN)
  28 #  define HOST_TO_BE32(x)       (x)
  29 #  define BE32_TO_HOST(x)       (x)
  30 #else
  31 #  define HOST_TO_BE32(x)       bswap_32(x)
  32 #  define BE32_TO_HOST(x)       bswap_32(x)
  33 #endif
  34
  35 #define HEADER_VERSION_V1       0x01000000
  36 #define HWID_TL_MR3220_V1       0x32200001
  37 #define HWID_TL_MR3420_V1       0x34200001
  38 #define HWID_TL_WA901ND_V1      0x09010001
  39 #define HWID_TL_WA901ND_V2      0x09010002
  40 #define HWID_TL_WR741ND_V1      0x07410001
  41 #define HWID_TL_WR740N_V1       0x07400001
  42 #define HWID_TL_WR841N_V1_5     0x08410002
  43 #define HWID_TL_WR841ND_V3      0x08410003
  44 #define HWID_TL_WR841ND_V5      0x08410005
  45 #define HWID_TL_WR841ND_V7      0x08410007
  46 #define HWID_TL_WR941ND_V2      0x09410002
  47 #define HWID_TL_WR941ND_V4      0x09410004
  48 #define HWID_TL_WR1043ND_V1     0x10430001
  49
  50 #define MD5SUM_LEN      16
  51
  52 struct file_info {
  53         char            *file_name;     /* name of the file */
  54         uint32_t        file_size;      /* length of the file */
  55 };
  56
  57 struct fw_header {
  58         uint32_t        version;        /* header version */
  59         char            vendor_name[24];
  60         char            fw_version[36];
  61         uint32_t        hw_id;          /* hardware id */
  62         uint32_t        hw_rev;         /* hardware revision */
  63         uint32_t        unk1;
  64         uint8_t         md5sum1[MD5SUM_LEN];
  65         uint32_t        unk2;
  66         uint8_t         md5sum2[MD5SUM_LEN];
  67         uint32_t        unk3;
  68         uint32_t        kernel_la;      /* kernel load address */
  69         uint32_t        kernel_ep;      /* kernel entry point */
  70         uint32_t        fw_length;      /* total length of the firmware */
  71         uint32_t        kernel_ofs;     /* kernel data offset */
  72         uint32_t        kernel_len;     /* kernel data length */
  73         uint32_t        rootfs_ofs;     /* rootfs data offset */
  74         uint32_t        rootfs_len;     /* rootfs data length */
  75         uint32_t        boot_ofs;       /* bootloader data offset */
  76         uint32_t        boot_len;       /* bootloader data length */
  77         uint8_t         pad[360];
  78 } __attribute__ ((packed));
  79
  80 struct board_info {
  81         char            *id;
  82         uint32_t        hw_id;
  83         uint32_t        hw_rev;
  84         uint32_t        fw_max_len;
  85         uint32_t        kernel_la;
  86         uint32_t        kernel_ep;
  87         uint32_t        rootfs_ofs;
  88 };
  89
  90 /*
  91  * Globals
  92  */
  93 static char *ofname;
  94 static char *progname;
  95 static char *vendor = "TP-LINK Technologies";
  96 static char *version = "ver. 1.0";
  97
  98 static char *board_id;
  99 static struct board_info *board;
 100 static struct file_info kernel_info;
 101 static uint32_t kernel_la = 0;
 102 static uint32_t kernel_ep = 0;
 103 static struct file_info rootfs_info;
 104 static uint32_t rootfs_ofs = 0;
 105 static struct file_info boot_info;
 106 static int combined;
 107 static int strip_padding;
 108
 109 static struct file_info inspect_info;
 110 static int extract = 0;
 111
 112 char md5salt_normal[MD5SUM_LEN] = {
 113         0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
 114         0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
 115 };
 116
 117 char md5salt_boot[MD5SUM_LEN] = {
 118         0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
 119         0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
 120 };
 121
 122 static struct board_info boards[] = {
 123         {
 124                 .id             = "TL-MR3220v1",
 125                 .hw_id          = HWID_TL_MR3220_V1,
 126                 .hw_rev         = 1,
 127                 .fw_max_len     = 0x3c0000,
 128                 .kernel_la      = 0x80060000,
 129                 .kernel_ep      = 0x80060000,
 130                 .rootfs_ofs     = 0x140000,
 131         }, {
 132                 .id             = "TL-MR3420v1",
 133                 .hw_id          = HWID_TL_MR3420_V1,
 134                 .hw_rev         = 1,
 135                 .fw_max_len     = 0x3c0000,
 136                 .kernel_la      = 0x80060000,
 137                 .kernel_ep      = 0x80060000,
 138                 .rootfs_ofs     = 0x140000,
 139         }, {
 140                 .id             = "TL-WA901NDv1",
 141                 .hw_id          = HWID_TL_WA901ND_V1,
 142                 .hw_rev         = 1,
 143                 .fw_max_len     = 0x3c0000,
 144                 .kernel_la      = 0x80060000,
 145                 .kernel_ep      = 0x80060000,
 146                 .rootfs_ofs     = 0x140000,
 147         }, {
 148                 .id             = "TL-WA901NDv2",
 149                 .hw_id          = HWID_TL_WA901ND_V2,
 150                 .hw_rev         = 1,
 151                 .fw_max_len     = 0x3c0000,
 152                 .kernel_la      = 0x80060000,
 153                 .kernel_ep      = 0x80060000,
 154                 .rootfs_ofs     = 0x140000,
 155         }, {
 156                 .id             = "TL-WR741NDv1",
 157                 .hw_id          = HWID_TL_WR741ND_V1,
 158                 .hw_rev         = 1,
 159                 .fw_max_len     = 0x3c0000,
 160                 .kernel_la      = 0x80060000,
 161                 .kernel_ep      = 0x80060000,
 162                 .rootfs_ofs     = 0x140000,
 163         }, {
 164                 .id             = "TL-WR740Nv1",
 165                 .hw_id          = HWID_TL_WR740N_V1,
 166                 .hw_rev         = 1,
 167                 .fw_max_len     = 0x3c0000,
 168                 .kernel_la      = 0x80060000,
 169                 .kernel_ep      = 0x80060000,
 170                 .rootfs_ofs     = 0x140000,
 171         }, {
 172                 .id             = "TL-WR841Nv1.5",
 173                 .hw_id          = HWID_TL_WR841N_V1_5,
 174                 .hw_rev         = 2,
 175                 .fw_max_len     = 0x3c0000,
 176                 .kernel_la      = 0x80060000,
 177                 .kernel_ep      = 0x80060000,
 178                 .rootfs_ofs     = 0x140000,
 179         }, {
 180                 .id             = "TL-WR841NDv3",
 181                 .hw_id          = HWID_TL_WR841ND_V3,
 182                 .hw_rev         = 3,
 183                 .fw_max_len     = 0x3c0000,
 184                 .kernel_la      = 0x80060000,
 185                 .kernel_ep      = 0x80060000,
 186                 .rootfs_ofs     = 0x140000,
 187         }, {
 188                 .id             = "TL-WR841NDv5",
 189                 .hw_id          = HWID_TL_WR841ND_V5,
 190                 .hw_rev         = 1,
 191                 .fw_max_len     = 0x3c0000,
 192                 .kernel_la      = 0x80060000,
 193                 .kernel_ep      = 0x80060000,
 194                 .rootfs_ofs     = 0x140000,
 195         }, {
 196                 .id             = "TL-WR841NDv7",
 197                 .hw_id          = HWID_TL_WR841ND_V7,
 198                 .hw_rev         = 1,
 199                 .fw_max_len     = 0x3c0000,
 200                 .kernel_la      = 0x80060000,
 201                 .kernel_ep      = 0x80060000,
 202                 .rootfs_ofs     = 0x140000,
 203         }, {
 204                 .id             = "TL-WR941NDv2",
 205                 .hw_id          = HWID_TL_WR941ND_V2,
 206                 .hw_rev         = 2,
 207                 .fw_max_len     = 0x3c0000,
 208                 .kernel_la      = 0x80060000,
 209                 .kernel_ep      = 0x80060000,
 210                 .rootfs_ofs     = 0x140000,
 211         }, {
 212                 .id             = "TL-WR941NDv4",
 213                 .hw_id          = HWID_TL_WR941ND_V4,
 214                 .hw_rev         = 1,
 215                 .fw_max_len     = 0x3c0000,
 216                 .kernel_la      = 0x80060000,
 217                 .kernel_ep      = 0x80060000,
 218                 .rootfs_ofs     = 0x140000,
 219         }, {
 220                 .id             = "TL-WR1043NDv1",
 221                 .hw_id          = HWID_TL_WR1043ND_V1,
 222                 .hw_rev         = 1,
 223                 .fw_max_len     = 0x7c0000,
 224                 .kernel_la      = 0x80060000,
 225                 .kernel_ep      = 0x80060000,
 226                 .rootfs_ofs     = 0x140000,
 227         }, {
 228                 /* terminating entry */
 229         }
 230 };
 231
 232 /*
 233  * Message macros
 234  */
 235 #define ERR(fmt, ...) do { \
 236         fflush(0); \
 237         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 238                         progname, ## __VA_ARGS__ ); \
 239 } while (0)
 240
 241 #define ERRS(fmt, ...) do { \
 242         int save = errno; \
 243         fflush(0); \
 244         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 245                         progname, ## __VA_ARGS__, strerror(save)); \
 246 } while (0)
 247
 248 #define DBG(fmt, ...) do { \
 249         fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
 250 } while (0)
 251
 252 static struct board_info *find_board(char *id)
 253 {
 254         struct board_info *ret;
 255         struct board_info *board;
 256
 257         ret = NULL;
 258         for (board = boards; board->id != NULL; board++){
 259                 if (strcasecmp(id, board->id) == 0) {
 260                         ret = board;
 261                         break;
 262                 }
 263         };
 264
 265         return ret;
 266 }
 267
 268 static struct board_info *find_board_by_hwid(uint32_t hw_id)
 269 {
 270         struct board_info *board;
 271
 272         for (board = boards; board->id != NULL; board++) {
 273                 if (hw_id == board->hw_id)
 274                         return board;
 275         };
 276
 277         return NULL;
 278 }
 279
 280
 281 static void usage(int status)
 282 {
 283         FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
 284         struct board_info *board;
 285
 286         fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
 287         fprintf(stream,
 288 "\n"
 289 "Options:\n"
 290 "  -B <board>      create image for the board specified with <board>\n"
 291 "  -c              use combined kernel image\n"
 292 "  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
 293 "  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
 294 "  -k <file>       read kernel image from the file <file>\n"
 295 "  -r <file>       read rootfs image from the file <file>\n"
 296 "  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
 297 "  -o <file>       write output to the file <file>\n"
 298 "  -s              strip padding from the end of the image\n"
 299 "  -N <vendor>     set image vendor to <vendor>\n"
 300 "  -V <version>    set image version to <version>\n"
 301 "  -i <file>       inspect given firmware file <file>\n"
 302 "  -x              extract kernel and rootfs while inspecting (requires -i)\n"
 303 "  -h              show this screen\n"
 304         );
 305
 306         exit(status);
 307 }
 308
 309 static int get_md5(char *data, int size, char *md5)
 310 {
 311         MD5_CTX ctx;
 312
 313         MD5_Init(&ctx);
 314         MD5_Update(&ctx, data, size);
 315         MD5_Final(md5, &ctx);
 316 }
 317
 318 static int get_file_stat(struct file_info *fdata)
 319 {
 320         struct stat st;
 321         int res;
 322
 323         if (fdata->file_name == NULL)
 324                 return 0;
 325
 326         res = stat(fdata->file_name, &st);
 327         if (res){
 328                 ERRS("stat failed on %s", fdata->file_name);
 329                 return res;
 330         }
 331
 332         fdata->file_size = st.st_size;
 333         return 0;
 334 }
 335
 336 static int read_to_buf(struct file_info *fdata, char *buf)
 337 {
 338         FILE *f;
 339         int ret = EXIT_FAILURE;
 340
 341         f = fopen(fdata->file_name, "r");
 342         if (f == NULL) {
 343                 ERRS("could not open \"%s\" for reading", fdata->file_name);
 344                 goto out;
 345         }
 346
 347         errno = 0;
 348         fread(buf, fdata->file_size, 1, f);
 349         if (errno != 0) {
 350                 ERRS("unable to read from file \"%s\"", fdata->file_name);
 351                 goto out_close;
 352         }
 353
 354         ret = EXIT_SUCCESS;
 355
 356  out_close:
 357         fclose(f);
 358  out:
 359         return ret;
 360 }
 361
 362 static int check_options(void)
 363 {
 364         int ret;
 365
 366         if (inspect_info.file_name) {
 367                 ret = get_file_stat(&inspect_info);
 368                 if (ret)
 369                         return ret;
 370
 371                 return 0;
 372         } else if (extract) {
 373                 ERR("no firmware for inspection specified");
 374                 return -1;
 375         }
 376
 377         if (board_id == NULL) {
 378                 ERR("no board specified");
 379                 return -1;
 380         }
 381
 382         board = find_board(board_id);
 383         if (board == NULL) {
 384                 ERR("unknown/unsupported board id \"%s\"", board_id);
 385                 return -1;
 386         }
 387         if (!kernel_la)
 388                 kernel_la = board->kernel_la;
 389         if (!kernel_ep)
 390                 kernel_ep = board->kernel_ep;
 391         if (!rootfs_ofs)
 392                 rootfs_ofs = board->rootfs_ofs;
 393
 394         if (kernel_info.file_name == NULL) {
 395                 ERR("no kernel image specified");
 396                 return -1;
 397         }
 398
 399         ret = get_file_stat(&kernel_info);
 400         if (ret)
 401                 return ret;
 402
 403         if (combined) {
 404                 if (kernel_info.file_size >
 405                     board->fw_max_len - sizeof(struct fw_header)) {
 406                         ERR("kernel image is too big");
 407                         return -1;
 408                 }
 409         } else {
 410                 if (kernel_info.file_size >
 411                     rootfs_ofs - sizeof(struct fw_header)) {
 412                         ERR("kernel image is too big");
 413                         return -1;
 414                 }
 415                 if (rootfs_info.file_name == NULL) {
 416                         ERR("no rootfs image specified");
 417                         return -1;
 418                 }
 419
 420                 ret = get_file_stat(&rootfs_info);
 421                 if (ret)
 422                         return ret;
 423
 424                 if (rootfs_info.file_size >
 425                     (board->fw_max_len - rootfs_ofs)) {
 426                         ERR("rootfs image is too big");
 427                         return -1;
 428                 }
 429         }
 430
 431         if (ofname == NULL) {
 432                 ERR("no output file specified");
 433                 return -1;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static void fill_header(char *buf, int len)
 440 {
 441         struct fw_header *hdr = (struct fw_header *)buf;
 442
 443         memset(hdr, 0, sizeof(struct fw_header));
 444
 445         hdr->version = HOST_TO_BE32(HEADER_VERSION_V1);
 446         strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
 447         strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
 448         hdr->hw_id = HOST_TO_BE32(board->hw_id);
 449         hdr->hw_rev = HOST_TO_BE32(board->hw_rev);
 450
 451         if (boot_info.file_size == 0)
 452                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
 453         else
 454                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
 455
 456         hdr->kernel_la = HOST_TO_BE32(kernel_la);
 457         hdr->kernel_ep = HOST_TO_BE32(kernel_ep);
 458         hdr->fw_length = HOST_TO_BE32(board->fw_max_len);
 459         hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header));
 460         hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size);
 461         if (!combined) {
 462                 hdr->rootfs_ofs = HOST_TO_BE32(rootfs_ofs);
 463                 hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size);
 464         }
 465
 466         get_md5(buf, len, hdr->md5sum1);
 467 }
 468
 469 static int write_fw(char *data, int len)
 470 {
 471         FILE *f;
 472         int ret = EXIT_FAILURE;
 473
 474         f = fopen(ofname, "w");
 475         if (f == NULL) {
 476                 ERRS("could not open \"%s\" for writing", ofname);
 477                 goto out;
 478         }
 479
 480         errno = 0;
 481         fwrite(data, len, 1, f);
 482         if (errno) {
 483                 ERRS("unable to write output file");
 484                 goto out_flush;
 485         }
 486
 487         DBG("firmware file \"%s\" completed", ofname);
 488
 489         ret = EXIT_SUCCESS;
 490
 491  out_flush:
 492         fflush(f);
 493         fclose(f);
 494         if (ret != EXIT_SUCCESS) {
 495                 unlink(ofname);
 496         }
 497  out:
 498         return ret;
 499 }
 500
 501 static int build_fw(void)
 502 {
 503         int buflen;
 504         char *buf;
 505         char *p;
 506         int ret = EXIT_FAILURE;
 507         int writelen = 0;
 508
 509         buflen = board->fw_max_len;
 510
 511         buf = malloc(buflen);
 512         if (!buf) {
 513                 ERR("no memory for buffer\n");
 514                 goto out;
 515         }
 516
 517         memset(buf, 0xff, buflen);
 518         p = buf + sizeof(struct fw_header);
 519         ret = read_to_buf(&kernel_info, p);
 520         if (ret)
 521                 goto out_free_buf;
 522
 523         writelen = kernel_info.file_size;
 524
 525         if (!combined) {
 526                 p = buf + rootfs_ofs;
 527                 ret = read_to_buf(&rootfs_info, p);
 528                 if (ret)
 529                         goto out_free_buf;
 530
 531                 writelen = rootfs_ofs + rootfs_info.file_size;
 532         }
 533
 534         if (!strip_padding)
 535                 writelen = buflen;
 536
 537         fill_header(buf, writelen);
 538         ret = write_fw(buf, writelen);
 539         if (ret)
 540                 goto out_free_buf;
 541
 542         ret = EXIT_SUCCESS;
 543
 544  out_free_buf:
 545         free(buf);
 546  out:
 547         return ret;
 548 }
 549
 550 /* Helper functions to inspect_fw() representing different output formats */
 551 static inline void inspect_fw_pstr(char *label, char *str)
 552 {
 553         printf("%-23s: %s\n", label, str);
 554 }
 555
 556 static inline void inspect_fw_phex(char *label, uint32_t val)
 557 {
 558         printf("%-23s: 0x%08x\n", label, val);
 559 }
 560
 561 static inline void inspect_fw_phexpost(char *label,
 562                                        uint32_t val, char *post)
 563 {
 564         printf("%-23s: 0x%08x (%s)\n", label, val, post);
 565 }
 566
 567 static inline void inspect_fw_phexdef(char *label,
 568                                       uint32_t val, uint32_t defval)
 569 {
 570         printf("%-23s: 0x%08x                  ", label, val);
 571
 572         if (val == defval)
 573                 printf("(== OpenWrt default)\n");
 574         else
 575                 printf("(OpenWrt default: 0x%08x)\n", defval);
 576 }
 577
 578 static inline void inspect_fw_phexexp(char *label,
 579                                       uint32_t val, uint32_t expval)
 580 {
 581         printf("%-23s: 0x%08x ", label, val);
 582
 583         if (val == expval)
 584                 printf("(ok)\n");
 585         else
 586                 printf("(expected: 0x%08x)\n", expval);
 587 }
 588
 589 static inline void inspect_fw_phexdec(char *label, uint32_t val)
 590 {
 591         printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
 592 }
 593
 594 static inline void inspect_fw_phexdecdef(char *label,
 595                                          uint32_t val, uint32_t defval)
 596 {
 597         printf("%-23s: 0x%08x / %8u bytes ", label, val, val);
 598
 599         if (val == defval)
 600                 printf("(== OpenWrt default)\n");
 601         else
 602                 printf("(OpenWrt default: 0x%08x)\n", defval);
 603 }
 604
 605 static inline void inspect_fw_pmd5sum(char *label, uint8_t *val, char *text)
 606 {
 607         int i;
 608
 609         printf("%-23s:", label);
 610         for (i=0; i<MD5SUM_LEN; i++)
 611                 printf(" %02x", val[i]);
 612         printf(" %s\n", text);
 613 }
 614
 615 static int inspect_fw(void)
 616 {
 617         char *buf;
 618         struct fw_header *hdr;
 619         uint8_t md5sum[MD5SUM_LEN];
 620         struct board_info *board;
 621         int ret = EXIT_FAILURE;
 622
 623         buf = malloc(inspect_info.file_size);
 624         if (!buf) {
 625                 ERR("no memory for buffer!\n");
 626                 goto out;
 627         }
 628
 629         ret = read_to_buf(&inspect_info, buf);
 630         if (ret)
 631                 goto out_free_buf;
 632         hdr = (struct fw_header *)buf;
 633
 634         inspect_fw_pstr("File name", inspect_info.file_name);
 635         inspect_fw_phexdec("File size", inspect_info.file_size);
 636
 637         if (BE32_TO_HOST(hdr->version) != HEADER_VERSION_V1) {
 638                 ERR("file does not seem to have V1 header!\n");
 639                 goto out_free_buf;
 640         }
 641
 642         inspect_fw_phexdec("Version 1 Header size", sizeof(struct fw_header));
 643
 644         if (BE32_TO_HOST(hdr->unk1) != 0)
 645                 inspect_fw_phexdec("Unknown value 1", hdr->unk1);
 646
 647         memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
 648         if (BE32_TO_HOST(hdr->boot_len) == 0)
 649                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
 650         else
 651                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
 652         get_md5(buf, inspect_info.file_size, hdr->md5sum1);
 653
 654         if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
 655                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
 656                 inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
 657         } else {
 658                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
 659         }
 660         if (BE32_TO_HOST(hdr->unk2) != 0)
 661                 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
 662         inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
 663                            "(purpose yet unknown, unchecked here)");
 664         if (BE32_TO_HOST(hdr->unk3) != 0)
 665                 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
 666
 667         printf("\n");
 668
 669         inspect_fw_pstr("Vendor name", hdr->vendor_name);
 670         inspect_fw_pstr("Firmware version", hdr->fw_version);
 671         board = find_board_by_hwid(BE32_TO_HOST(hdr->hw_id));
 672         if (board) {
 673                 inspect_fw_phexpost("Hardware ID",
 674                                     BE32_TO_HOST(hdr->hw_id), board->id);
 675                 inspect_fw_phexexp("Hardware Revision",
 676                                    BE32_TO_HOST(hdr->hw_rev), board->hw_rev);
 677         } else {
 678                 inspect_fw_phexpost("Hardware ID",
 679                                     BE32_TO_HOST(hdr->hw_id), "unknown");
 680                 inspect_fw_phex("Hardware Revision",
 681                                 BE32_TO_HOST(hdr->hw_rev));
 682         }
 683
 684         printf("\n");
 685
 686         inspect_fw_phexdec("Kernel data offset",
 687                            BE32_TO_HOST(hdr->kernel_ofs));
 688         inspect_fw_phexdec("Kernel data length",
 689                            BE32_TO_HOST(hdr->kernel_len));
 690         if (board) {
 691                 inspect_fw_phexdef("Kernel load address",
 692                                    BE32_TO_HOST(hdr->kernel_la),
 693                                    board->kernel_la);
 694                 inspect_fw_phexdef("Kernel entry point",
 695                                    BE32_TO_HOST(hdr->kernel_ep),
 696                                    board->kernel_ep);
 697                 inspect_fw_phexdecdef("Rootfs data offset",
 698                                       BE32_TO_HOST(hdr->rootfs_ofs),
 699                                       board->rootfs_ofs);
 700         } else {
 701                 inspect_fw_phex("Kernel load address",
 702                                 BE32_TO_HOST(hdr->kernel_la));
 703                 inspect_fw_phex("Kernel entry point",
 704                                 BE32_TO_HOST(hdr->kernel_ep));
 705                 inspect_fw_phexdec("Rootfs data offset",
 706                                    BE32_TO_HOST(hdr->rootfs_ofs));
 707         }
 708         inspect_fw_phexdec("Rootfs data length",
 709                            BE32_TO_HOST(hdr->rootfs_len));
 710         inspect_fw_phexdec("Boot loader data offset",
 711                            BE32_TO_HOST(hdr->boot_ofs));
 712         inspect_fw_phexdec("Boot loader data length",
 713                            BE32_TO_HOST(hdr->boot_len));
 714         inspect_fw_phexdec("Total firmware length",
 715                            BE32_TO_HOST(hdr->fw_length));
 716
 717         if (extract) {
 718                 FILE *fp;
 719                 char *filename;
 720
 721                 printf("\n");
 722
 723                 filename = malloc(strlen(inspect_info.file_name) + 8);
 724                 sprintf(filename, "%s-kernel", inspect_info.file_name);
 725                 printf("Extracting kernel to \"%s\"...\n", filename);
 726                 fp = fopen(filename, "w");
 727                 if (fp) {
 728                         if (!fwrite(buf + BE32_TO_HOST(hdr->kernel_ofs),
 729                                     BE32_TO_HOST(hdr->kernel_len), 1, fp)) {
 730                                 ERR("error in fwrite(): %s", strerror(errno));
 731                         }
 732                         fclose(fp);
 733                 } else {
 734                         ERR("error in fopen(): %s", strerror(errno));
 735                 }
 736                 free(filename);
 737
 738                 filename = malloc(strlen(inspect_info.file_name) + 8);
 739                 sprintf(filename, "%s-rootfs", inspect_info.file_name);
 740                 printf("Extracting rootfs to \"%s\"...\n", filename);
 741                 fp = fopen(filename, "w");
 742                 if (fp) {
 743                         if (!fwrite(buf + BE32_TO_HOST(hdr->rootfs_ofs),
 744                                     BE32_TO_HOST(hdr->rootfs_len), 1, fp)) {
 745                                 ERR("error in fwrite(): %s", strerror(errno));
 746                         }
 747                         fclose(fp);
 748                 } else {
 749                         ERR("error in fopen(): %s", strerror(errno));
 750                 }
 751                 free(filename);
 752         }
 753
 754  out_free_buf:
 755         free(buf);
 756  out:
 757         return ret;
 758 }
 759
 760 int main(int argc, char *argv[])
 761 {
 762         int ret = EXIT_FAILURE;
 763         int err;
 764
 765         FILE *outfile;
 766
 767         progname = basename(argv[0]);
 768
 769         while ( 1 ) {
 770                 int c;
 771
 772                 c = getopt(argc, argv, "B:E:L:V:N:ci:k:r:R:o:xhs");
 773                 if (c == -1)
 774                         break;
 775
 776                 switch (c) {
 777                 case 'B':
 778                         board_id = optarg;
 779                         break;
 780                 case 'E':
 781                         sscanf(optarg, "0x%x", &kernel_ep);
 782                         break;
 783                 case 'L':
 784                         sscanf(optarg, "0x%x", &kernel_la);
 785                         break;
 786                 case 'V':
 787                         version = optarg;
 788                         break;
 789                 case 'N':
 790                         vendor = optarg;
 791                         break;
 792                 case 'c':
 793                         combined++;
 794                         break;
 795                 case 'k':
 796                         kernel_info.file_name = optarg;
 797                         break;
 798                 case 'r':
 799                         rootfs_info.file_name = optarg;
 800                         break;
 801                 case 'R':
 802                         sscanf(optarg, "0x%x", &rootfs_ofs);
 803                         break;
 804                 case 'o':
 805                         ofname = optarg;
 806                         break;
 807                 case 's':
 808                         strip_padding = 1;
 809                         break;
 810                 case 'i':
 811                         inspect_info.file_name = optarg;
 812                         break;
 813                 case 'x':
 814                         extract = 1;
 815                         break;
 816                 case 'h':
 817                         usage(EXIT_SUCCESS);
 818                         break;
 819                 default:
 820                         usage(EXIT_FAILURE);
 821                         break;
 822                 }
 823         }
 824
 825         ret = check_options();
 826         if (ret)
 827                 goto out;
 828
 829         if (!inspect_info.file_name)
 830                 ret = build_fw();
 831         else
 832                 ret = inspect_fw();
 833
 834  out:
 835         return ret;
 836 }
 837