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