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 ALIGN(x,a) ({ typeof(a) __a = (a); (((x) + __a - 1) & ~(__a - 1)); })
  31 #define ARRAY_SIZE(a) (sizeof((a)) / sizeof((a)[0]))
  32
  33 #define HEADER_VERSION_V1       0x01000000
  34 #define HEADER_VERSION_V2       0x02000000
  35
  36 #define MD5SUM_LEN      16
  37
  38 struct file_info {
  39         char            *file_name;     /* name of the file */
  40         uint32_t        file_size;      /* length of the file */
  41 };
  42
  43 struct fw_header {
  44         uint32_t        version;        /* header version */
  45         char            vendor_name[24];
  46         char            fw_version[36];
  47         uint32_t        hw_id;          /* hardware id */
  48         uint32_t        hw_rev;         /* hardware revision */
  49         uint32_t        region_code;    /* region code */
  50         uint8_t         md5sum1[MD5SUM_LEN];
  51         uint32_t        unk2;
  52         uint8_t         md5sum2[MD5SUM_LEN];
  53         uint32_t        unk3;
  54         uint32_t        kernel_la;      /* kernel load address */
  55         uint32_t        kernel_ep;      /* kernel entry point */
  56         uint32_t        fw_length;      /* total length of the firmware */
  57         uint32_t        kernel_ofs;     /* kernel data offset */
  58         uint32_t        kernel_len;     /* kernel data length */
  59         uint32_t        rootfs_ofs;     /* rootfs data offset */
  60         uint32_t        rootfs_len;     /* rootfs data length */
  61         uint32_t        boot_ofs;       /* bootloader data offset */
  62         uint32_t        boot_len;       /* bootloader data length */
  63         uint16_t        ver_hi;
  64         uint16_t        ver_mid;
  65         uint16_t        ver_lo;
  66         uint8_t         pad[130];
  67         char            region_str1[32];
  68         char            region_str2[32];
  69         uint8_t         pad2[160];
  70 } __attribute__ ((packed));
  71
  72 struct flash_layout {
  73         char            *id;
  74         uint32_t        fw_max_len;
  75         uint32_t        kernel_la;
  76         uint32_t        kernel_ep;
  77         uint32_t        rootfs_ofs;
  78 };
  79
  80 struct fw_region {
  81         char            name[4];
  82         uint32_t        code;
  83 };
  84
  85
  86 /*
  87  * Globals
  88  */
  89 static char *ofname;
  90 static char *progname;
  91 static char *vendor = "TP-LINK Technologies";
  92 static char *version = "ver. 1.0";
  93 static char *fw_ver = "0.0.0";
  94 static uint32_t hdr_ver = HEADER_VERSION_V1;
  95
  96 static char *layout_id;
  97 static struct flash_layout *layout;
  98 static char *opt_hw_id;
  99 static uint32_t hw_id;
 100 static char *opt_hw_rev;
 101 static uint32_t hw_rev;
 102 static uint32_t opt_hdr_ver = 1;
 103 static char *country;
 104 static const struct fw_region *region;
 105 static int fw_ver_lo;
 106 static int fw_ver_mid;
 107 static int fw_ver_hi;
 108 static struct file_info kernel_info;
 109 static uint32_t kernel_la = 0;
 110 static uint32_t kernel_ep = 0;
 111 static uint32_t kernel_len = 0;
 112 static struct file_info rootfs_info;
 113 static uint32_t rootfs_ofs = 0;
 114 static uint32_t rootfs_align;
 115 static struct file_info boot_info;
 116 static int combined;
 117 static int strip_padding;
 118 static int ignore_size;
 119 static int add_jffs2_eof;
 120 static unsigned char jffs2_eof_mark[4] = {0xde, 0xad, 0xc0, 0xde};
 121 static uint32_t fw_max_len;
 122 static uint32_t reserved_space;
 123
 124 static struct file_info inspect_info;
 125 static int extract = 0;
 126
 127 static const char md5salt_normal[MD5SUM_LEN] = {
 128         0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
 129         0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
 130 };
 131
 132 static const char md5salt_boot[MD5SUM_LEN] = {
 133         0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
 134         0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
 135 };
 136
 137 static struct flash_layout layouts[] = {
 138         {
 139                 .id             = "4M",
 140                 .fw_max_len     = 0x3c0000,
 141                 .kernel_la      = 0x80060000,
 142                 .kernel_ep      = 0x80060000,
 143                 .rootfs_ofs     = 0x140000,
 144         }, {
 145                 .id             = "4Mlzma",
 146                 .fw_max_len     = 0x3c0000,
 147                 .kernel_la      = 0x80060000,
 148                 .kernel_ep      = 0x80060000,
 149                 .rootfs_ofs     = 0x100000,
 150         }, {
 151                 .id             = "8M",
 152                 .fw_max_len     = 0x7c0000,
 153                 .kernel_la      = 0x80060000,
 154                 .kernel_ep      = 0x80060000,
 155                 .rootfs_ofs     = 0x140000,
 156         }, {
 157                 .id             = "8Mlzma",
 158                 .fw_max_len     = 0x7c0000,
 159                 .kernel_la      = 0x80060000,
 160                 .kernel_ep      = 0x80060000,
 161                 .rootfs_ofs     = 0x100000,
 162         }, {
 163                 .id             = "16M",
 164                 .fw_max_len     = 0xf80000,
 165                 .kernel_la      = 0x80060000,
 166                 .kernel_ep      = 0x80060000,
 167                 .rootfs_ofs     = 0x140000,
 168         }, {
 169                 .id             = "16Mlzma",
 170                 .fw_max_len     = 0xf80000,
 171                 .kernel_la      = 0x80060000,
 172                 .kernel_ep      = 0x80060000,
 173                 .rootfs_ofs     = 0x100000,
 174         }, {
 175                 .id             = "16Mppc",
 176                 .fw_max_len     = 0xf80000,
 177                 .kernel_la      = 0x00000000 ,
 178                 .kernel_ep      = 0xc0000000,
 179                 .rootfs_ofs     = 0x2a0000,
 180         }, {
 181                 /*
 182                         Some devices (e.g. TL-WR1043 v4) use a mktplinkfw kernel image
 183                         embedded in a tplink-safeloader image as os-image partition.
 184
 185                         We use a 1.5MB partition for the compressed kernel, which should
 186                         be sufficient, but not too wasteful (the flash of the TL-WR1043 v4
 187                         has 16MB in total).
 188                 */
 189                 .id             = "16Msafeloader",
 190                 .fw_max_len     = 0x180000,
 191                 .kernel_la      = 0x80060000,
 192                 .kernel_ep      = 0x80060000,
 193                 .rootfs_ofs     = 0,
 194         }, {
 195                 /* terminating entry */
 196         }
 197 };
 198
 199 static const struct fw_region regions[] = {
 200         /* Default region (universal) uses code 0 as well */
 201         {"US", 1},
 202         {"EU", 0},
 203 };
 204
 205 /*
 206  * Message macros
 207  */
 208 #define ERR(fmt, ...) do { \
 209         fflush(0); \
 210         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 211                         progname, ## __VA_ARGS__ ); \
 212 } while (0)
 213
 214 #define ERRS(fmt, ...) do { \
 215         int save = errno; \
 216         fflush(0); \
 217         fprintf(stderr, "[%s] *** error: " fmt ": %s\n", \
 218                         progname, ## __VA_ARGS__, strerror(save)); \
 219 } while (0)
 220
 221 #define DBG(fmt, ...) do { \
 222         fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
 223 } while (0)
 224
 225 static struct flash_layout *find_layout(const char *id)
 226 {
 227         struct flash_layout *ret;
 228         struct flash_layout *l;
 229
 230         ret = NULL;
 231         for (l = layouts; l->id != NULL; l++){
 232                 if (strcasecmp(id, l->id) == 0) {
 233                         ret = l;
 234                         break;
 235                 }
 236         };
 237
 238         return ret;
 239 }
 240
 241 static const struct fw_region * find_region(const char *country) {
 242         size_t i;
 243
 244         for (i = 0; i < ARRAY_SIZE(regions); i++) {
 245                 if (strcasecmp(regions[i].name, country) == 0)
 246                         return &regions[i];
 247         }
 248
 249         return NULL;
 250 }
 251
 252 static void usage(int status)
 253 {
 254         fprintf(stderr, "Usage: %s [OPTIONS...]\n", progname);
 255         fprintf(stderr,
 256 "\n"
 257 "Options:\n"
 258 "  -c              use combined kernel image\n"
 259 "  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
 260 "  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
 261 "  -H <hwid>       use hardware id specified with <hwid>\n"
 262 "  -W <hwrev>      use hardware revision specified with <hwrev>\n"
 263 "  -C <country>    set region code to <country>\n"
 264 "  -F <id>         use flash layout specified with <id>\n"
 265 "  -k <file>       read kernel image from the file <file>\n"
 266 "  -r <file>       read rootfs image from the file <file>\n"
 267 "  -a <align>      align the rootfs start on an <align> bytes boundary\n"
 268 "  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
 269 "  -o <file>       write output to the file <file>\n"
 270 "  -s              strip padding from the end of the image\n"
 271 "  -S              ignore firmware size limit (only for combined images)\n"
 272 "  -j              add jffs2 end-of-filesystem markers\n"
 273 "  -N <vendor>     set image vendor to <vendor>\n"
 274 "  -V <version>    set image version to <version>\n"
 275 "  -v <version>    set firmware version to <version>\n"
 276 "  -m <version>    set header version to <version>\n"
 277 "  -i <file>       inspect given firmware file <file>\n"
 278 "  -x              extract kernel and rootfs while inspecting (requires -i)\n"
 279 "  -X <size>       reserve <size> bytes in the firmware image (hexval prefixed with 0x)\n"
 280 "  -h              show this screen\n"
 281         );
 282
 283         exit(status);
 284 }
 285
 286 static void get_md5(const char *data, int size, uint8_t *md5)
 287 {
 288         MD5_CTX ctx;
 289
 290         MD5_Init(&ctx);
 291         MD5_Update(&ctx, data, size);
 292         MD5_Final(md5, &ctx);
 293 }
 294
 295 static int get_file_stat(struct file_info *fdata)
 296 {
 297         struct stat st;
 298         int res;
 299
 300         if (fdata->file_name == NULL)
 301                 return 0;
 302
 303         res = stat(fdata->file_name, &st);
 304         if (res){
 305                 ERRS("stat failed on %s", fdata->file_name);
 306                 return res;
 307         }
 308
 309         fdata->file_size = st.st_size;
 310         return 0;
 311 }
 312
 313 static int read_to_buf(const struct file_info *fdata, char *buf)
 314 {
 315         FILE *f;
 316         int ret = EXIT_FAILURE;
 317
 318         f = fopen(fdata->file_name, "r");
 319         if (f == NULL) {
 320                 ERRS("could not open \"%s\" for reading", fdata->file_name);
 321                 goto out;
 322         }
 323
 324         errno = 0;
 325         fread(buf, fdata->file_size, 1, f);
 326         if (errno != 0) {
 327                 ERRS("unable to read from file \"%s\"", fdata->file_name);
 328                 goto out_close;
 329         }
 330
 331         ret = EXIT_SUCCESS;
 332
 333  out_close:
 334         fclose(f);
 335  out:
 336         return ret;
 337 }
 338
 339 static int check_options(void)
 340 {
 341         int ret;
 342         int exceed_bytes;
 343
 344         if (inspect_info.file_name) {
 345                 ret = get_file_stat(&inspect_info);
 346                 if (ret)
 347                         return ret;
 348
 349                 return 0;
 350         } else if (extract) {
 351                 ERR("no firmware for inspection specified");
 352                 return -1;
 353         }
 354
 355         if (opt_hw_id == NULL) {
 356                 ERR("hardware id not specified");
 357                 return -1;
 358         }
 359         hw_id = strtoul(opt_hw_id, NULL, 0);
 360
 361         if (layout_id == NULL) {
 362                 ERR("flash layout is not specified");
 363                 return -1;
 364         }
 365
 366         if (opt_hw_rev)
 367                 hw_rev = strtoul(opt_hw_rev, NULL, 0);
 368         else
 369                 hw_rev = 1;
 370
 371         if (country) {
 372                 region = find_region(country);
 373                 if (!region) {
 374                         ERR("unknown region code \"%s\"", country);
 375                         return -1;
 376                 }
 377         }
 378
 379         layout = find_layout(layout_id);
 380         if (layout == NULL) {
 381                 ERR("unknown flash layout \"%s\"", layout_id);
 382                 return -1;
 383         }
 384
 385         if (!kernel_la)
 386                 kernel_la = layout->kernel_la;
 387         if (!kernel_ep)
 388                 kernel_ep = layout->kernel_ep;
 389         if (!rootfs_ofs)
 390                 rootfs_ofs = layout->rootfs_ofs;
 391
 392         if (reserved_space > layout->fw_max_len) {
 393                 ERR("reserved space is not valid");
 394                 return -1;
 395         }
 396
 397         fw_max_len = layout->fw_max_len - reserved_space;
 398
 399         if (kernel_info.file_name == NULL) {
 400                 ERR("no kernel image specified");
 401                 return -1;
 402         }
 403
 404         ret = get_file_stat(&kernel_info);
 405         if (ret)
 406                 return ret;
 407
 408         kernel_len = kernel_info.file_size;
 409
 410         if (combined) {
 411                 exceed_bytes = kernel_info.file_size - (fw_max_len - sizeof(struct fw_header));
 412                 if (exceed_bytes > 0) {
 413                         if (!ignore_size) {
 414                                 ERR("kernel image is too big by %i bytes", exceed_bytes);
 415                                 return -1;
 416                         }
 417                         layout->fw_max_len = sizeof(struct fw_header) +
 418                                              kernel_info.file_size +
 419                                              reserved_space;
 420                 }
 421         } else {
 422                 if (rootfs_info.file_name == NULL) {
 423                         ERR("no rootfs image specified");
 424                         return -1;
 425                 }
 426
 427                 ret = get_file_stat(&rootfs_info);
 428                 if (ret)
 429                         return ret;
 430
 431                 if (rootfs_align) {
 432                         kernel_len += sizeof(struct fw_header);
 433                         kernel_len = ALIGN(kernel_len, rootfs_align);
 434                         kernel_len -= sizeof(struct fw_header);
 435
 436                         DBG("kernel length aligned to %u", kernel_len);
 437
 438                         exceed_bytes = kernel_len + rootfs_info.file_size - (fw_max_len - sizeof(struct fw_header));
 439                         if (exceed_bytes > 0) {
 440                                 ERR("images are too big by %i bytes", exceed_bytes);
 441                                 return -1;
 442                         }
 443                 } else {
 444                         exceed_bytes = kernel_info.file_size - (rootfs_ofs - sizeof(struct fw_header));
 445                         if (exceed_bytes > 0) {
 446                                 ERR("kernel image is too big by %i bytes", exceed_bytes);
 447                                 return -1;
 448                         }
 449
 450                         exceed_bytes = rootfs_info.file_size - (fw_max_len - rootfs_ofs);
 451                         if (exceed_bytes > 0) {
 452                                 ERR("rootfs image is too big by %i bytes", exceed_bytes);
 453                                 return -1;
 454                         }
 455                 }
 456         }
 457
 458         if (ofname == NULL) {
 459                 ERR("no output file specified");
 460                 return -1;
 461         }
 462
 463         ret = sscanf(fw_ver, "%d.%d.%d", &fw_ver_hi, &fw_ver_mid, &fw_ver_lo);
 464         if (ret != 3) {
 465                 ERR("invalid firmware version '%s'", fw_ver);
 466                 return -1;
 467         }
 468
 469         if (opt_hdr_ver == 1) {
 470                 hdr_ver = HEADER_VERSION_V1;
 471         } else if (opt_hdr_ver == 2) {
 472                 hdr_ver = HEADER_VERSION_V2;
 473         } else {
 474                 ERR("invalid header version '%u'", opt_hdr_ver);
 475                 return -1;
 476         }
 477
 478         return 0;
 479 }
 480
 481 static void fill_header(char *buf, int len)
 482 {
 483         struct fw_header *hdr = (struct fw_header *)buf;
 484
 485         memset(hdr, 0, sizeof(struct fw_header));
 486
 487         hdr->version = htonl(hdr_ver);
 488         strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
 489         strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
 490         hdr->hw_id = htonl(hw_id);
 491         hdr->hw_rev = htonl(hw_rev);
 492
 493         if (boot_info.file_size == 0)
 494                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
 495         else
 496                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
 497
 498         hdr->kernel_la = htonl(kernel_la);
 499         hdr->kernel_ep = htonl(kernel_ep);
 500         hdr->fw_length = htonl(layout->fw_max_len);
 501         hdr->kernel_ofs = htonl(sizeof(struct fw_header));
 502         hdr->kernel_len = htonl(kernel_len);
 503         if (!combined) {
 504                 hdr->rootfs_ofs = htonl(rootfs_ofs);
 505                 hdr->rootfs_len = htonl(rootfs_info.file_size);
 506         }
 507
 508         hdr->ver_hi = htons(fw_ver_hi);
 509         hdr->ver_mid = htons(fw_ver_mid);
 510         hdr->ver_lo = htons(fw_ver_lo);
 511
 512         if (region) {
 513                 hdr->region_code = htonl(region->code);
 514                 snprintf(
 515                         hdr->region_str1, sizeof(hdr->region_str1), "00000000;%02X%02X%02X%02X;",
 516                         region->name[0], region->name[1], region->name[2], region->name[3]
 517                 );
 518                 snprintf(
 519                         hdr->region_str2, sizeof(hdr->region_str2), "%02X%02X%02X%02X",
 520                         region->name[0], region->name[1], region->name[2], region->name[3]
 521                 );
 522         }
 523
 524         get_md5(buf, len, hdr->md5sum1);
 525 }
 526
 527 static int pad_jffs2(char *buf, int currlen)
 528 {
 529         int len;
 530         uint32_t pad_mask;
 531
 532         len = currlen;
 533         pad_mask = (64 * 1024);
 534         while ((len < layout->fw_max_len) && (pad_mask != 0)) {
 535                 uint32_t mask;
 536                 int i;
 537
 538                 for (i = 10; i < 32; i++) {
 539                         mask = 1 << i;
 540                         if (pad_mask & mask)
 541                                 break;
 542                 }
 543
 544                 len = ALIGN(len, mask);
 545
 546                 for (i = 10; i < 32; i++) {
 547                         mask = 1 << i;
 548                         if ((len & (mask - 1)) == 0)
 549                                 pad_mask &= ~mask;
 550                 }
 551
 552                 for (i = 0; i < sizeof(jffs2_eof_mark); i++)
 553                         buf[len + i] = jffs2_eof_mark[i];
 554
 555                 len += sizeof(jffs2_eof_mark);
 556         }
 557
 558         return len;
 559 }
 560
 561 static int write_fw(const char *data, int len)
 562 {
 563         FILE *f;
 564         int ret = EXIT_FAILURE;
 565
 566         f = fopen(ofname, "w");
 567         if (f == NULL) {
 568                 ERRS("could not open \"%s\" for writing", ofname);
 569                 goto out;
 570         }
 571
 572         errno = 0;
 573         fwrite(data, len, 1, f);
 574         if (errno) {
 575                 ERRS("unable to write output file");
 576                 goto out_flush;
 577         }
 578
 579         DBG("firmware file \"%s\" completed", ofname);
 580
 581         ret = EXIT_SUCCESS;
 582
 583  out_flush:
 584         fflush(f);
 585         fclose(f);
 586         if (ret != EXIT_SUCCESS) {
 587                 unlink(ofname);
 588         }
 589  out:
 590         return ret;
 591 }
 592
 593 static int build_fw(void)
 594 {
 595         int buflen;
 596         char *buf;
 597         char *p;
 598         int ret = EXIT_FAILURE;
 599         int writelen = 0;
 600
 601         buflen = layout->fw_max_len;
 602
 603         buf = malloc(buflen);
 604         if (!buf) {
 605                 ERR("no memory for buffer\n");
 606                 goto out;
 607         }
 608
 609         memset(buf, 0xff, buflen);
 610         p = buf + sizeof(struct fw_header);
 611         ret = read_to_buf(&kernel_info, p);
 612         if (ret)
 613                 goto out_free_buf;
 614
 615         writelen = sizeof(struct fw_header) + kernel_len;
 616
 617         if (!combined) {
 618                 if (rootfs_align)
 619                         p = buf + writelen;
 620                 else
 621                         p = buf + rootfs_ofs;
 622
 623                 ret = read_to_buf(&rootfs_info, p);
 624                 if (ret)
 625                         goto out_free_buf;
 626
 627                 if (rootfs_align)
 628                         writelen += rootfs_info.file_size;
 629                 else
 630                         writelen = rootfs_ofs + rootfs_info.file_size;
 631
 632                 if (add_jffs2_eof)
 633                         writelen = pad_jffs2(buf, writelen);
 634         }
 635
 636         if (!strip_padding)
 637                 writelen = buflen;
 638
 639         fill_header(buf, writelen);
 640         ret = write_fw(buf, writelen);
 641         if (ret)
 642                 goto out_free_buf;
 643
 644         ret = EXIT_SUCCESS;
 645
 646  out_free_buf:
 647         free(buf);
 648  out:
 649         return ret;
 650 }
 651
 652 /* Helper functions to inspect_fw() representing different output formats */
 653 static inline void inspect_fw_pstr(const char *label, const char *str)
 654 {
 655         printf("%-23s: %s\n", label, str);
 656 }
 657
 658 static inline void inspect_fw_phex(const char *label, uint32_t val)
 659 {
 660         printf("%-23s: 0x%08x\n", label, val);
 661 }
 662
 663 static inline void inspect_fw_phexdec(const char *label, uint32_t val)
 664 {
 665         printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
 666 }
 667
 668 static inline void inspect_fw_pmd5sum(const char *label, const uint8_t *val, const char *text)
 669 {
 670         int i;
 671
 672         printf("%-23s:", label);
 673         for (i=0; i<MD5SUM_LEN; i++)
 674                 printf(" %02x", val[i]);
 675         printf(" %s\n", text);
 676 }
 677
 678 static int inspect_fw(void)
 679 {
 680         char *buf;
 681         struct fw_header *hdr;
 682         uint8_t md5sum[MD5SUM_LEN];
 683         int ret = EXIT_FAILURE;
 684
 685         buf = malloc(inspect_info.file_size);
 686         if (!buf) {
 687                 ERR("no memory for buffer!\n");
 688                 goto out;
 689         }
 690
 691         ret = read_to_buf(&inspect_info, buf);
 692         if (ret)
 693                 goto out_free_buf;
 694         hdr = (struct fw_header *)buf;
 695
 696         inspect_fw_pstr("File name", inspect_info.file_name);
 697         inspect_fw_phexdec("File size", inspect_info.file_size);
 698
 699         if ((ntohl(hdr->version) != HEADER_VERSION_V1) &&
 700             (ntohl(hdr->version) != HEADER_VERSION_V2)) {
 701                 ERR("file does not seem to have V1/V2 header!\n");
 702                 goto out_free_buf;
 703         }
 704
 705         inspect_fw_phexdec("Version 1 Header size", sizeof(struct fw_header));
 706
 707         memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
 708         if (ntohl(hdr->boot_len) == 0)
 709                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
 710         else
 711                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
 712         get_md5(buf, inspect_info.file_size, hdr->md5sum1);
 713
 714         if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
 715                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
 716                 inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
 717         } else {
 718                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
 719         }
 720         if (ntohl(hdr->unk2) != 0)
 721                 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
 722         inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
 723                            "(purpose yet unknown, unchecked here)");
 724         if (ntohl(hdr->unk3) != 0)
 725                 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
 726
 727         printf("\n");
 728
 729         inspect_fw_pstr("Vendor name", hdr->vendor_name);
 730         inspect_fw_pstr("Firmware version", hdr->fw_version);
 731         inspect_fw_phex("Hardware ID", ntohl(hdr->hw_id));
 732         inspect_fw_phex("Hardware Revision", ntohl(hdr->hw_rev));
 733         inspect_fw_phex("Region code", ntohl(hdr->region_code));
 734
 735         printf("\n");
 736
 737         inspect_fw_phexdec("Kernel data offset",
 738                            ntohl(hdr->kernel_ofs));
 739         inspect_fw_phexdec("Kernel data length",
 740                            ntohl(hdr->kernel_len));
 741         inspect_fw_phex("Kernel load address",
 742                         ntohl(hdr->kernel_la));
 743         inspect_fw_phex("Kernel entry point",
 744                         ntohl(hdr->kernel_ep));
 745         inspect_fw_phexdec("Rootfs data offset",
 746                            ntohl(hdr->rootfs_ofs));
 747         inspect_fw_phexdec("Rootfs data length",
 748                            ntohl(hdr->rootfs_len));
 749         inspect_fw_phexdec("Boot loader data offset",
 750                            ntohl(hdr->boot_ofs));
 751         inspect_fw_phexdec("Boot loader data length",
 752                            ntohl(hdr->boot_len));
 753         inspect_fw_phexdec("Total firmware length",
 754                            ntohl(hdr->fw_length));
 755
 756         if (extract) {
 757                 FILE *fp;
 758                 char *filename;
 759
 760                 printf("\n");
 761
 762                 filename = malloc(strlen(inspect_info.file_name) + 8);
 763                 sprintf(filename, "%s-kernel", inspect_info.file_name);
 764                 printf("Extracting kernel to \"%s\"...\n", filename);
 765                 fp = fopen(filename, "w");
 766                 if (fp) {
 767                         if (!fwrite(buf + ntohl(hdr->kernel_ofs),
 768                                     ntohl(hdr->kernel_len), 1, fp)) {
 769                                 ERR("error in fwrite(): %s", strerror(errno));
 770                         }
 771                         fclose(fp);
 772                 } else {
 773                         ERR("error in fopen(): %s", strerror(errno));
 774                 }
 775                 free(filename);
 776
 777                 filename = malloc(strlen(inspect_info.file_name) + 8);
 778                 sprintf(filename, "%s-rootfs", inspect_info.file_name);
 779                 printf("Extracting rootfs to \"%s\"...\n", filename);
 780                 fp = fopen(filename, "w");
 781                 if (fp) {
 782                         if (!fwrite(buf + ntohl(hdr->rootfs_ofs),
 783                                     ntohl(hdr->rootfs_len), 1, fp)) {
 784                                 ERR("error in fwrite(): %s", strerror(errno));
 785                         }
 786                         fclose(fp);
 787                 } else {
 788                         ERR("error in fopen(): %s", strerror(errno));
 789                 }
 790                 free(filename);
 791         }
 792
 793  out_free_buf:
 794         free(buf);
 795  out:
 796         return ret;
 797 }
 798
 799 int main(int argc, char *argv[])
 800 {
 801         int ret = EXIT_FAILURE;
 802
 803         progname = basename(argv[0]);
 804
 805         while ( 1 ) {
 806                 int c;
 807
 808                 c = getopt(argc, argv, "a:H:E:F:L:m:V:N:W:C:ci:k:r:R:o:xX:hsSjv:");
 809                 if (c == -1)
 810                         break;
 811
 812                 switch (c) {
 813                 case 'a':
 814                         sscanf(optarg, "0x%x", &rootfs_align);
 815                         break;
 816                 case 'H':
 817                         opt_hw_id = optarg;
 818                         break;
 819                 case 'E':
 820                         sscanf(optarg, "0x%x", &kernel_ep);
 821                         break;
 822                 case 'F':
 823                         layout_id = optarg;
 824                         break;
 825                 case 'W':
 826                         opt_hw_rev = optarg;
 827                         break;
 828                 case 'C':
 829                         country = optarg;
 830                         break;
 831                 case 'L':
 832                         sscanf(optarg, "0x%x", &kernel_la);
 833                         break;
 834                 case 'm':
 835                         sscanf(optarg, "%u", &opt_hdr_ver);
 836                         break;
 837                 case 'V':
 838                         version = optarg;
 839                         break;
 840                 case 'v':
 841                         fw_ver = optarg;
 842                         break;
 843                 case 'N':
 844                         vendor = optarg;
 845                         break;
 846                 case 'c':
 847                         combined++;
 848                         break;
 849                 case 'k':
 850                         kernel_info.file_name = optarg;
 851                         break;
 852                 case 'r':
 853                         rootfs_info.file_name = optarg;
 854                         break;
 855                 case 'R':
 856                         sscanf(optarg, "0x%x", &rootfs_ofs);
 857                         break;
 858                 case 'o':
 859                         ofname = optarg;
 860                         break;
 861                 case 's':
 862                         strip_padding = 1;
 863                         break;
 864                 case 'S':
 865                         ignore_size = 1;
 866                         break;
 867                 case 'i':
 868                         inspect_info.file_name = optarg;
 869                         break;
 870                 case 'j':
 871                         add_jffs2_eof = 1;
 872                         break;
 873                 case 'x':
 874                         extract = 1;
 875                         break;
 876                 case 'h':
 877                         usage(EXIT_SUCCESS);
 878                         break;
 879                 case 'X':
 880                         sscanf(optarg, "0x%x", &reserved_space);
 881                         break;
 882                 default:
 883                         usage(EXIT_FAILURE);
 884                         break;
 885                 }
 886         }
 887
 888         ret = check_options();
 889         if (ret)
 890                 goto out;
 891
 892         if (!inspect_info.file_name)
 893                 ret = build_fw();
 894         else
 895                 ret = inspect_fw();
 896
 897  out:
 898         return ret;
 899 }