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_WR703N_V1       0x07030101
  41 #define HWID_TL_WR741ND_V1      0x07410001
  42 #define HWID_TL_WR741ND_V4      0x07410004
  43 #define HWID_TL_WR740N_V1       0x07400001
  44 #define HWID_TL_WR740N_V3       0x07400003
  45 #define HWID_TL_WR743ND_V1      0x07430001
  46 #define HWID_TL_WR841N_V1_5     0x08410002
  47 #define HWID_TL_WR841ND_V3      0x08410003
  48 #define HWID_TL_WR841ND_V5      0x08410005
  49 #define HWID_TL_WR841ND_V7      0x08410007
  50 #define HWID_TL_WR941ND_V2      0x09410002
  51 #define HWID_TL_WR941ND_V4      0x09410004
  52 #define HWID_TL_WR1043ND_V1     0x10430001
  53
  54 #define MD5SUM_LEN      16
  55
  56 struct file_info {
  57         char            *file_name;     /* name of the file */
  58         uint32_t        file_size;      /* length of the file */
  59 };
  60
  61 struct fw_header {
  62         uint32_t        version;        /* header version */
  63         char            vendor_name[24];
  64         char            fw_version[36];
  65         uint32_t        hw_id;          /* hardware id */
  66         uint32_t        hw_rev;         /* hardware revision */
  67         uint32_t        unk1;
  68         uint8_t         md5sum1[MD5SUM_LEN];
  69         uint32_t        unk2;
  70         uint8_t         md5sum2[MD5SUM_LEN];
  71         uint32_t        unk3;
  72         uint32_t        kernel_la;      /* kernel load address */
  73         uint32_t        kernel_ep;      /* kernel entry point */
  74         uint32_t        fw_length;      /* total length of the firmware */
  75         uint32_t        kernel_ofs;     /* kernel data offset */
  76         uint32_t        kernel_len;     /* kernel data length */
  77         uint32_t        rootfs_ofs;     /* rootfs data offset */
  78         uint32_t        rootfs_len;     /* rootfs data length */
  79         uint32_t        boot_ofs;       /* bootloader data offset */
  80         uint32_t        boot_len;       /* bootloader data length */
  81         uint8_t         pad[360];
  82 } __attribute__ ((packed));
  83
  84 struct board_info {
  85         char            *id;
  86         uint32_t        hw_id;
  87         uint32_t        hw_rev;
  88         uint32_t        fw_max_len;
  89         uint32_t        kernel_la;
  90         uint32_t        kernel_ep;
  91         uint32_t        rootfs_ofs;
  92 };
  93
  94 /*
  95  * Globals
  96  */
  97 static char *ofname;
  98 static char *progname;
  99 static char *vendor = "TP-LINK Technologies";
 100 static char *version = "ver. 1.0";
 101
 102 static char *board_id;
 103 static struct board_info *board;
 104 static struct file_info kernel_info;
 105 static uint32_t kernel_la = 0;
 106 static uint32_t kernel_ep = 0;
 107 static struct file_info rootfs_info;
 108 static uint32_t rootfs_ofs = 0;
 109 static struct file_info boot_info;
 110 static int combined;
 111 static int strip_padding;
 112
 113 static struct file_info inspect_info;
 114 static int extract = 0;
 115
 116 char md5salt_normal[MD5SUM_LEN] = {
 117         0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
 118         0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
 119 };
 120
 121 char md5salt_boot[MD5SUM_LEN] = {
 122         0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
 123         0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
 124 };
 125
 126 static struct board_info boards[] = {
 127         {
 128                 .id             = "TL-MR3220v1",
 129                 .hw_id          = HWID_TL_MR3220_V1,
 130                 .hw_rev         = 1,
 131                 .fw_max_len     = 0x3c0000,
 132                 .kernel_la      = 0x80060000,
 133                 .kernel_ep      = 0x80060000,
 134                 .rootfs_ofs     = 0x140000,
 135         }, {
 136                 .id             = "TL-MR3420v1",
 137                 .hw_id          = HWID_TL_MR3420_V1,
 138                 .hw_rev         = 1,
 139                 .fw_max_len     = 0x3c0000,
 140                 .kernel_la      = 0x80060000,
 141                 .kernel_ep      = 0x80060000,
 142                 .rootfs_ofs     = 0x140000,
 143         }, {
 144                 .id             = "TL-WA901NDv1",
 145                 .hw_id          = HWID_TL_WA901ND_V1,
 146                 .hw_rev         = 1,
 147                 .fw_max_len     = 0x3c0000,
 148                 .kernel_la      = 0x80060000,
 149                 .kernel_ep      = 0x80060000,
 150                 .rootfs_ofs     = 0x140000,
 151         }, {
 152                 .id             = "TL-WA901NDv2",
 153                 .hw_id          = HWID_TL_WA901ND_V2,
 154                 .hw_rev         = 1,
 155                 .fw_max_len     = 0x3c0000,
 156                 .kernel_la      = 0x80060000,
 157                 .kernel_ep      = 0x80060000,
 158                 .rootfs_ofs     = 0x140000,
 159         }, {
 160                 .id             = "TL-WR741NDv1",
 161                 .hw_id          = HWID_TL_WR741ND_V1,
 162                 .hw_rev         = 1,
 163                 .fw_max_len     = 0x3c0000,
 164                 .kernel_la      = 0x80060000,
 165                 .kernel_ep      = 0x80060000,
 166                 .rootfs_ofs     = 0x140000,
 167         }, {
 168                 .id             = "TL-WR741NDv4",
 169                 .hw_id          = HWID_TL_WR741ND_V4,
 170                 .hw_rev         = 1,
 171                 .fw_max_len     = 0x3c0000,
 172                 .kernel_la      = 0x80060000,
 173                 .kernel_ep      = 0x80060000,
 174                 .rootfs_ofs     = 0x100000,
 175         }, {
 176                 .id             = "TL-WR740Nv1",
 177                 .hw_id          = HWID_TL_WR740N_V1,
 178                 .hw_rev         = 1,
 179                 .fw_max_len     = 0x3c0000,
 180                 .kernel_la      = 0x80060000,
 181                 .kernel_ep      = 0x80060000,
 182                 .rootfs_ofs     = 0x140000,
 183         }, {
 184                 .id             = "TL-WR740Nv3",
 185                 .hw_id          = HWID_TL_WR740N_V3,
 186                 .hw_rev         = 1,
 187                 .fw_max_len     = 0x3c0000,
 188                 .kernel_la      = 0x80060000,
 189                 .kernel_ep      = 0x80060000,
 190                 .rootfs_ofs     = 0x140000,
 191         }, {
 192                 .id             = "TL-WR743NDv1",
 193                 .hw_id          = HWID_TL_WR743ND_V1,
 194                 .hw_rev         = 1,
 195                 .fw_max_len     = 0x3c0000,
 196                 .kernel_la      = 0x80060000,
 197                 .kernel_ep      = 0x80060000,
 198                 .rootfs_ofs     = 0x140000,
 199         }, {
 200                 .id             = "TL-WR841Nv1.5",
 201                 .hw_id          = HWID_TL_WR841N_V1_5,
 202                 .hw_rev         = 2,
 203                 .fw_max_len     = 0x3c0000,
 204                 .kernel_la      = 0x80060000,
 205                 .kernel_ep      = 0x80060000,
 206                 .rootfs_ofs     = 0x140000,
 207         }, {
 208                 .id             = "TL-WR841NDv3",
 209                 .hw_id          = HWID_TL_WR841ND_V3,
 210                 .hw_rev         = 3,
 211                 .fw_max_len     = 0x3c0000,
 212                 .kernel_la      = 0x80060000,
 213                 .kernel_ep      = 0x80060000,
 214                 .rootfs_ofs     = 0x140000,
 215         }, {
 216                 .id             = "TL-WR841NDv5",
 217                 .hw_id          = HWID_TL_WR841ND_V5,
 218                 .hw_rev         = 1,
 219                 .fw_max_len     = 0x3c0000,
 220                 .kernel_la      = 0x80060000,
 221                 .kernel_ep      = 0x80060000,
 222                 .rootfs_ofs     = 0x140000,
 223         }, {
 224                 .id             = "TL-WR841NDv7",
 225                 .hw_id          = HWID_TL_WR841ND_V7,
 226                 .hw_rev         = 1,
 227                 .fw_max_len     = 0x3c0000,
 228                 .kernel_la      = 0x80060000,
 229                 .kernel_ep      = 0x80060000,
 230                 .rootfs_ofs     = 0x140000,
 231         }, {
 232                 .id             = "TL-WR941NDv2",
 233                 .hw_id          = HWID_TL_WR941ND_V2,
 234                 .hw_rev         = 2,
 235                 .fw_max_len     = 0x3c0000,
 236                 .kernel_la      = 0x80060000,
 237                 .kernel_ep      = 0x80060000,
 238                 .rootfs_ofs     = 0x140000,
 239         }, {
 240                 .id             = "TL-WR941NDv4",
 241                 .hw_id          = HWID_TL_WR941ND_V4,
 242                 .hw_rev         = 1,
 243                 .fw_max_len     = 0x3c0000,
 244                 .kernel_la      = 0x80060000,
 245                 .kernel_ep      = 0x80060000,
 246                 .rootfs_ofs     = 0x140000,
 247         }, {
 248                 .id             = "TL-WR1043NDv1",
 249                 .hw_id          = HWID_TL_WR1043ND_V1,
 250                 .hw_rev         = 1,
 251                 .fw_max_len     = 0x7c0000,
 252                 .kernel_la      = 0x80060000,
 253                 .kernel_ep      = 0x80060000,
 254                 .rootfs_ofs     = 0x140000,
 255         }, {
 256                 .id             = "TL-WR703Nv1",
 257                 .hw_id          = HWID_TL_WR703N_V1,
 258                 .hw_rev         = 1,
 259                 .fw_max_len     = 0x3c0000,
 260                 .kernel_la      = 0x80060000,
 261                 .kernel_ep      = 0x80060000,
 262                 .rootfs_ofs     = 0x100000,
 263         }, {
 264                 /* terminating entry */
 265         }
 266 };
 267
 268 /*
 269  * Message macros
 270  */
 271 #define ERR(fmt, ...) do { \
 272         fflush(0); \
 273         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 274                         progname, ## __VA_ARGS__ ); \
 275 } while (0)
 276
 277 #define ERRS(fmt, ...) do { \
 278         int save = errno; \
 279         fflush(0); \
 280         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 281                         progname, ## __VA_ARGS__, strerror(save)); \
 282 } while (0)
 283
 284 #define DBG(fmt, ...) do { \
 285         fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
 286 } while (0)
 287
 288 static struct board_info *find_board(char *id)
 289 {
 290         struct board_info *ret;
 291         struct board_info *board;
 292
 293         ret = NULL;
 294         for (board = boards; board->id != NULL; board++){
 295                 if (strcasecmp(id, board->id) == 0) {
 296                         ret = board;
 297                         break;
 298                 }
 299         };
 300
 301         return ret;
 302 }
 303
 304 static struct board_info *find_board_by_hwid(uint32_t hw_id)
 305 {
 306         struct board_info *board;
 307
 308         for (board = boards; board->id != NULL; board++) {
 309                 if (hw_id == board->hw_id)
 310                         return board;
 311         };
 312
 313         return NULL;
 314 }
 315
 316
 317 static void usage(int status)
 318 {
 319         FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
 320         struct board_info *board;
 321
 322         fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
 323         fprintf(stream,
 324 "\n"
 325 "Options:\n"
 326 "  -B <board>      create image for the board specified with <board>\n"
 327 "  -c              use combined kernel image\n"
 328 "  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
 329 "  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
 330 "  -k <file>       read kernel image from the file <file>\n"
 331 "  -r <file>       read rootfs image from the file <file>\n"
 332 "  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
 333 "  -o <file>       write output to the file <file>\n"
 334 "  -s              strip padding from the end of the image\n"
 335 "  -N <vendor>     set image vendor to <vendor>\n"
 336 "  -V <version>    set image version to <version>\n"
 337 "  -i <file>       inspect given firmware file <file>\n"
 338 "  -x              extract kernel and rootfs while inspecting (requires -i)\n"
 339 "  -h              show this screen\n"
 340         );
 341
 342         exit(status);
 343 }
 344
 345 static int get_md5(char *data, int size, char *md5)
 346 {
 347         MD5_CTX ctx;
 348
 349         MD5_Init(&ctx);
 350         MD5_Update(&ctx, data, size);
 351         MD5_Final(md5, &ctx);
 352 }
 353
 354 static int get_file_stat(struct file_info *fdata)
 355 {
 356         struct stat st;
 357         int res;
 358
 359         if (fdata->file_name == NULL)
 360                 return 0;
 361
 362         res = stat(fdata->file_name, &st);
 363         if (res){
 364                 ERRS("stat failed on %s", fdata->file_name);
 365                 return res;
 366         }
 367
 368         fdata->file_size = st.st_size;
 369         return 0;
 370 }
 371
 372 static int read_to_buf(struct file_info *fdata, char *buf)
 373 {
 374         FILE *f;
 375         int ret = EXIT_FAILURE;
 376
 377         f = fopen(fdata->file_name, "r");
 378         if (f == NULL) {
 379                 ERRS("could not open \"%s\" for reading", fdata->file_name);
 380                 goto out;
 381         }
 382
 383         errno = 0;
 384         fread(buf, fdata->file_size, 1, f);
 385         if (errno != 0) {
 386                 ERRS("unable to read from file \"%s\"", fdata->file_name);
 387                 goto out_close;
 388         }
 389
 390         ret = EXIT_SUCCESS;
 391
 392  out_close:
 393         fclose(f);
 394  out:
 395         return ret;
 396 }
 397
 398 static int check_options(void)
 399 {
 400         int ret;
 401
 402         if (inspect_info.file_name) {
 403                 ret = get_file_stat(&inspect_info);
 404                 if (ret)
 405                         return ret;
 406
 407                 return 0;
 408         } else if (extract) {
 409                 ERR("no firmware for inspection specified");
 410                 return -1;
 411         }
 412
 413         if (board_id == NULL) {
 414                 ERR("no board specified");
 415                 return -1;
 416         }
 417
 418         board = find_board(board_id);
 419         if (board == NULL) {
 420                 ERR("unknown/unsupported board id \"%s\"", board_id);
 421                 return -1;
 422         }
 423         if (!kernel_la)
 424                 kernel_la = board->kernel_la;
 425         if (!kernel_ep)
 426                 kernel_ep = board->kernel_ep;
 427         if (!rootfs_ofs)
 428                 rootfs_ofs = board->rootfs_ofs;
 429
 430         if (kernel_info.file_name == NULL) {
 431                 ERR("no kernel image specified");
 432                 return -1;
 433         }
 434
 435         ret = get_file_stat(&kernel_info);
 436         if (ret)
 437                 return ret;
 438
 439         if (combined) {
 440                 if (kernel_info.file_size >
 441                     board->fw_max_len - sizeof(struct fw_header)) {
 442                         ERR("kernel image is too big");
 443                         return -1;
 444                 }
 445         } else {
 446                 if (kernel_info.file_size >
 447                     rootfs_ofs - sizeof(struct fw_header)) {
 448                         ERR("kernel image is too big");
 449                         return -1;
 450                 }
 451                 if (rootfs_info.file_name == NULL) {
 452                         ERR("no rootfs image specified");
 453                         return -1;
 454                 }
 455
 456                 ret = get_file_stat(&rootfs_info);
 457                 if (ret)
 458                         return ret;
 459
 460                 if (rootfs_info.file_size >
 461                     (board->fw_max_len - rootfs_ofs)) {
 462                         ERR("rootfs image is too big");
 463                         return -1;
 464                 }
 465         }
 466
 467         if (ofname == NULL) {
 468                 ERR("no output file specified");
 469                 return -1;
 470         }
 471
 472         return 0;
 473 }
 474
 475 static void fill_header(char *buf, int len)
 476 {
 477         struct fw_header *hdr = (struct fw_header *)buf;
 478
 479         memset(hdr, 0, sizeof(struct fw_header));
 480
 481         hdr->version = HOST_TO_BE32(HEADER_VERSION_V1);
 482         strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
 483         strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
 484         hdr->hw_id = HOST_TO_BE32(board->hw_id);
 485         hdr->hw_rev = HOST_TO_BE32(board->hw_rev);
 486
 487         if (boot_info.file_size == 0)
 488                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
 489         else
 490                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
 491
 492         hdr->kernel_la = HOST_TO_BE32(kernel_la);
 493         hdr->kernel_ep = HOST_TO_BE32(kernel_ep);
 494         hdr->fw_length = HOST_TO_BE32(board->fw_max_len);
 495         hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header));
 496         hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size);
 497         if (!combined) {
 498                 hdr->rootfs_ofs = HOST_TO_BE32(rootfs_ofs);
 499                 hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size);
 500         }
 501
 502         get_md5(buf, len, hdr->md5sum1);
 503 }
 504
 505 static int write_fw(char *data, int len)
 506 {
 507         FILE *f;
 508         int ret = EXIT_FAILURE;
 509
 510         f = fopen(ofname, "w");
 511         if (f == NULL) {
 512                 ERRS("could not open \"%s\" for writing", ofname);
 513                 goto out;
 514         }
 515
 516         errno = 0;
 517         fwrite(data, len, 1, f);
 518         if (errno) {
 519                 ERRS("unable to write output file");
 520                 goto out_flush;
 521         }
 522
 523         DBG("firmware file \"%s\" completed", ofname);
 524
 525         ret = EXIT_SUCCESS;
 526
 527  out_flush:
 528         fflush(f);
 529         fclose(f);
 530         if (ret != EXIT_SUCCESS) {
 531                 unlink(ofname);
 532         }
 533  out:
 534         return ret;
 535 }
 536
 537 static int build_fw(void)
 538 {
 539         int buflen;
 540         char *buf;
 541         char *p;
 542         int ret = EXIT_FAILURE;
 543         int writelen = 0;
 544
 545         buflen = board->fw_max_len;
 546
 547         buf = malloc(buflen);
 548         if (!buf) {
 549                 ERR("no memory for buffer\n");
 550                 goto out;
 551         }
 552
 553         memset(buf, 0xff, buflen);
 554         p = buf + sizeof(struct fw_header);
 555         ret = read_to_buf(&kernel_info, p);
 556         if (ret)
 557                 goto out_free_buf;
 558
 559         writelen = kernel_info.file_size;
 560
 561         if (!combined) {
 562                 p = buf + rootfs_ofs;
 563                 ret = read_to_buf(&rootfs_info, p);
 564                 if (ret)
 565                         goto out_free_buf;
 566
 567                 writelen = rootfs_ofs + rootfs_info.file_size;
 568         }
 569
 570         if (!strip_padding)
 571                 writelen = buflen;
 572
 573         fill_header(buf, writelen);
 574         ret = write_fw(buf, writelen);
 575         if (ret)
 576                 goto out_free_buf;
 577
 578         ret = EXIT_SUCCESS;
 579
 580  out_free_buf:
 581         free(buf);
 582  out:
 583         return ret;
 584 }
 585
 586 /* Helper functions to inspect_fw() representing different output formats */
 587 static inline void inspect_fw_pstr(char *label, char *str)
 588 {
 589         printf("%-23s: %s\n", label, str);
 590 }
 591
 592 static inline void inspect_fw_phex(char *label, uint32_t val)
 593 {
 594         printf("%-23s: 0x%08x\n", label, val);
 595 }
 596
 597 static inline void inspect_fw_phexpost(char *label,
 598                                        uint32_t val, char *post)
 599 {
 600         printf("%-23s: 0x%08x (%s)\n", label, val, post);
 601 }
 602
 603 static inline void inspect_fw_phexdef(char *label,
 604                                       uint32_t val, uint32_t defval)
 605 {
 606         printf("%-23s: 0x%08x                  ", label, val);
 607
 608         if (val == defval)
 609                 printf("(== OpenWrt default)\n");
 610         else
 611                 printf("(OpenWrt default: 0x%08x)\n", defval);
 612 }
 613
 614 static inline void inspect_fw_phexexp(char *label,
 615                                       uint32_t val, uint32_t expval)
 616 {
 617         printf("%-23s: 0x%08x ", label, val);
 618
 619         if (val == expval)
 620                 printf("(ok)\n");
 621         else
 622                 printf("(expected: 0x%08x)\n", expval);
 623 }
 624
 625 static inline void inspect_fw_phexdec(char *label, uint32_t val)
 626 {
 627         printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
 628 }
 629
 630 static inline void inspect_fw_phexdecdef(char *label,
 631                                          uint32_t val, uint32_t defval)
 632 {
 633         printf("%-23s: 0x%08x / %8u bytes ", label, val, val);
 634
 635         if (val == defval)
 636                 printf("(== OpenWrt default)\n");
 637         else
 638                 printf("(OpenWrt default: 0x%08x)\n", defval);
 639 }
 640
 641 static inline void inspect_fw_pmd5sum(char *label, uint8_t *val, char *text)
 642 {
 643         int i;
 644
 645         printf("%-23s:", label);
 646         for (i=0; i<MD5SUM_LEN; i++)
 647                 printf(" %02x", val[i]);
 648         printf(" %s\n", text);
 649 }
 650
 651 static int inspect_fw(void)
 652 {
 653         char *buf;
 654         struct fw_header *hdr;
 655         uint8_t md5sum[MD5SUM_LEN];
 656         struct board_info *board;
 657         int ret = EXIT_FAILURE;
 658
 659         buf = malloc(inspect_info.file_size);
 660         if (!buf) {
 661                 ERR("no memory for buffer!\n");
 662                 goto out;
 663         }
 664
 665         ret = read_to_buf(&inspect_info, buf);
 666         if (ret)
 667                 goto out_free_buf;
 668         hdr = (struct fw_header *)buf;
 669
 670         inspect_fw_pstr("File name", inspect_info.file_name);
 671         inspect_fw_phexdec("File size", inspect_info.file_size);
 672
 673         if (BE32_TO_HOST(hdr->version) != HEADER_VERSION_V1) {
 674                 ERR("file does not seem to have V1 header!\n");
 675                 goto out_free_buf;
 676         }
 677
 678         inspect_fw_phexdec("Version 1 Header size", sizeof(struct fw_header));
 679
 680         if (BE32_TO_HOST(hdr->unk1) != 0)
 681                 inspect_fw_phexdec("Unknown value 1", hdr->unk1);
 682
 683         memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
 684         if (BE32_TO_HOST(hdr->boot_len) == 0)
 685                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
 686         else
 687                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
 688         get_md5(buf, inspect_info.file_size, hdr->md5sum1);
 689
 690         if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
 691                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
 692                 inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
 693         } else {
 694                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
 695         }
 696         if (BE32_TO_HOST(hdr->unk2) != 0)
 697                 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
 698         inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
 699                            "(purpose yet unknown, unchecked here)");
 700         if (BE32_TO_HOST(hdr->unk3) != 0)
 701                 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
 702
 703         printf("\n");
 704
 705         inspect_fw_pstr("Vendor name", hdr->vendor_name);
 706         inspect_fw_pstr("Firmware version", hdr->fw_version);
 707         board = find_board_by_hwid(BE32_TO_HOST(hdr->hw_id));
 708         if (board) {
 709                 inspect_fw_phexpost("Hardware ID",
 710                                     BE32_TO_HOST(hdr->hw_id), board->id);
 711                 inspect_fw_phexexp("Hardware Revision",
 712                                    BE32_TO_HOST(hdr->hw_rev), board->hw_rev);
 713         } else {
 714                 inspect_fw_phexpost("Hardware ID",
 715                                     BE32_TO_HOST(hdr->hw_id), "unknown");
 716                 inspect_fw_phex("Hardware Revision",
 717                                 BE32_TO_HOST(hdr->hw_rev));
 718         }
 719
 720         printf("\n");
 721
 722         inspect_fw_phexdec("Kernel data offset",
 723                            BE32_TO_HOST(hdr->kernel_ofs));
 724         inspect_fw_phexdec("Kernel data length",
 725                            BE32_TO_HOST(hdr->kernel_len));
 726         if (board) {
 727                 inspect_fw_phexdef("Kernel load address",
 728                                    BE32_TO_HOST(hdr->kernel_la),
 729                                    board->kernel_la);
 730                 inspect_fw_phexdef("Kernel entry point",
 731                                    BE32_TO_HOST(hdr->kernel_ep),
 732                                    board->kernel_ep);
 733                 inspect_fw_phexdecdef("Rootfs data offset",
 734                                       BE32_TO_HOST(hdr->rootfs_ofs),
 735                                       board->rootfs_ofs);
 736         } else {
 737                 inspect_fw_phex("Kernel load address",
 738                                 BE32_TO_HOST(hdr->kernel_la));
 739                 inspect_fw_phex("Kernel entry point",
 740                                 BE32_TO_HOST(hdr->kernel_ep));
 741                 inspect_fw_phexdec("Rootfs data offset",
 742                                    BE32_TO_HOST(hdr->rootfs_ofs));
 743         }
 744         inspect_fw_phexdec("Rootfs data length",
 745                            BE32_TO_HOST(hdr->rootfs_len));
 746         inspect_fw_phexdec("Boot loader data offset",
 747                            BE32_TO_HOST(hdr->boot_ofs));
 748         inspect_fw_phexdec("Boot loader data length",
 749                            BE32_TO_HOST(hdr->boot_len));
 750         inspect_fw_phexdec("Total firmware length",
 751                            BE32_TO_HOST(hdr->fw_length));
 752
 753         if (extract) {
 754                 FILE *fp;
 755                 char *filename;
 756
 757                 printf("\n");
 758
 759                 filename = malloc(strlen(inspect_info.file_name) + 8);
 760                 sprintf(filename, "%s-kernel", inspect_info.file_name);
 761                 printf("Extracting kernel to \"%s\"...\n", filename);
 762                 fp = fopen(filename, "w");
 763                 if (fp) {
 764                         if (!fwrite(buf + BE32_TO_HOST(hdr->kernel_ofs),
 765                                     BE32_TO_HOST(hdr->kernel_len), 1, fp)) {
 766                                 ERR("error in fwrite(): %s", strerror(errno));
 767                         }
 768                         fclose(fp);
 769                 } else {
 770                         ERR("error in fopen(): %s", strerror(errno));
 771                 }
 772                 free(filename);
 773
 774                 filename = malloc(strlen(inspect_info.file_name) + 8);
 775                 sprintf(filename, "%s-rootfs", inspect_info.file_name);
 776                 printf("Extracting rootfs to \"%s\"...\n", filename);
 777                 fp = fopen(filename, "w");
 778                 if (fp) {
 779                         if (!fwrite(buf + BE32_TO_HOST(hdr->rootfs_ofs),
 780                                     BE32_TO_HOST(hdr->rootfs_len), 1, fp)) {
 781                                 ERR("error in fwrite(): %s", strerror(errno));
 782                         }
 783                         fclose(fp);
 784                 } else {
 785                         ERR("error in fopen(): %s", strerror(errno));
 786                 }
 787                 free(filename);
 788         }
 789
 790  out_free_buf:
 791         free(buf);
 792  out:
 793         return ret;
 794 }
 795
 796 int main(int argc, char *argv[])
 797 {
 798         int ret = EXIT_FAILURE;
 799         int err;
 800
 801         FILE *outfile;
 802
 803         progname = basename(argv[0]);
 804
 805         while ( 1 ) {
 806                 int c;
 807
 808                 c = getopt(argc, argv, "B:E:L:V:N:ci:k:r:R:o:xhs");
 809                 if (c == -1)
 810                         break;
 811
 812                 switch (c) {
 813                 case 'B':
 814                         board_id = optarg;
 815                         break;
 816                 case 'E':
 817                         sscanf(optarg, "0x%x", &kernel_ep);
 818                         break;
 819                 case 'L':
 820                         sscanf(optarg, "0x%x", &kernel_la);
 821                         break;
 822                 case 'V':
 823                         version = optarg;
 824                         break;
 825                 case 'N':
 826                         vendor = optarg;
 827                         break;
 828                 case 'c':
 829                         combined++;
 830                         break;
 831                 case 'k':
 832                         kernel_info.file_name = optarg;
 833                         break;
 834                 case 'r':
 835                         rootfs_info.file_name = optarg;
 836                         break;
 837                 case 'R':
 838                         sscanf(optarg, "0x%x", &rootfs_ofs);
 839                         break;
 840                 case 'o':
 841                         ofname = optarg;
 842                         break;
 843                 case 's':
 844                         strip_padding = 1;
 845                         break;
 846                 case 'i':
 847                         inspect_info.file_name = optarg;
 848                         break;
 849                 case 'x':
 850                         extract = 1;
 851                         break;
 852                 case 'h':
 853                         usage(EXIT_SUCCESS);
 854                         break;
 855                 default:
 856                         usage(EXIT_FAILURE);
 857                         break;
 858                 }
 859         }
 860
 861         ret = check_options();
 862         if (ret)
 863                 goto out;
 864
 865         if (!inspect_info.file_name)
 866                 ret = build_fw();
 867         else
 868                 ret = inspect_fw();
 869
 870  out:
 871         return ret;
 872 }
 873