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
  32 #define HEADER_VERSION_V1       0x01000000
  33 #define HEADER_VERSION_V2       0x02000000
  34
  35 #define MD5SUM_LEN      16
  36
  37 struct file_info {
  38         char            *file_name;     /* name of the file */
  39         uint32_t        file_size;      /* length of the file */
  40 };
  41
  42 struct fw_header {
  43         uint32_t        version;        /* header version */
  44         char            vendor_name[24];
  45         char            fw_version[36];
  46         uint32_t        hw_id;          /* hardware id */
  47         uint32_t        hw_rev;         /* hardware revision */
  48         uint32_t        unk1;
  49         uint8_t         md5sum1[MD5SUM_LEN];
  50         uint32_t        unk2;
  51         uint8_t         md5sum2[MD5SUM_LEN];
  52         uint32_t        unk3;
  53         uint32_t        kernel_la;      /* kernel load address */
  54         uint32_t        kernel_ep;      /* kernel entry point */
  55         uint32_t        fw_length;      /* total length of the firmware */
  56         uint32_t        kernel_ofs;     /* kernel data offset */
  57         uint32_t        kernel_len;     /* kernel data length */
  58         uint32_t        rootfs_ofs;     /* rootfs data offset */
  59         uint32_t        rootfs_len;     /* rootfs data length */
  60         uint32_t        boot_ofs;       /* bootloader data offset */
  61         uint32_t        boot_len;       /* bootloader data length */
  62         uint16_t        ver_hi;
  63         uint16_t        ver_mid;
  64         uint16_t        ver_lo;
  65         uint8_t         pad[354];
  66 } __attribute__ ((packed));
  67
  68 struct flash_layout {
  69         char            *id;
  70         uint32_t        fw_max_len;
  71         uint32_t        kernel_la;
  72         uint32_t        kernel_ep;
  73         uint32_t        rootfs_ofs;
  74 };
  75
  76 /*
  77  * Globals
  78  */
  79 static char *ofname;
  80 static char *progname;
  81 static char *vendor = "TP-LINK Technologies";
  82 static char *version = "ver. 1.0";
  83 static char *fw_ver = "0.0.0";
  84 static uint32_t hdr_ver = HEADER_VERSION_V1;
  85
  86 static char *layout_id;
  87 static struct flash_layout *layout;
  88 static char *opt_hw_id;
  89 static uint32_t hw_id;
  90 static char *opt_hw_rev;
  91 static uint32_t hw_rev;
  92 static uint32_t opt_hdr_ver = 1;
  93 static int fw_ver_lo;
  94 static int fw_ver_mid;
  95 static int fw_ver_hi;
  96 static struct file_info kernel_info;
  97 static uint32_t kernel_la = 0;
  98 static uint32_t kernel_ep = 0;
  99 static uint32_t kernel_len = 0;
 100 static struct file_info rootfs_info;
 101 static uint32_t rootfs_ofs = 0;
 102 static uint32_t rootfs_align;
 103 static struct file_info boot_info;
 104 static int combined;
 105 static int strip_padding;
 106 static int ignore_size;
 107 static int add_jffs2_eof;
 108 static unsigned char jffs2_eof_mark[4] = {0xde, 0xad, 0xc0, 0xde};
 109 static uint32_t fw_max_len;
 110 static uint32_t reserved_space;
 111
 112 static struct file_info inspect_info;
 113 static int extract = 0;
 114
 115 static const char md5salt_normal[MD5SUM_LEN] = {
 116         0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
 117         0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
 118 };
 119
 120 static const char md5salt_boot[MD5SUM_LEN] = {
 121         0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
 122         0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
 123 };
 124
 125 static struct flash_layout layouts[] = {
 126         {
 127                 .id             = "4M",
 128                 .fw_max_len     = 0x3c0000,
 129                 .kernel_la      = 0x80060000,
 130                 .kernel_ep      = 0x80060000,
 131                 .rootfs_ofs     = 0x140000,
 132         }, {
 133                 .id             = "4Mlzma",
 134                 .fw_max_len     = 0x3c0000,
 135                 .kernel_la      = 0x80060000,
 136                 .kernel_ep      = 0x80060000,
 137                 .rootfs_ofs     = 0x100000,
 138         }, {
 139                 .id             = "8M",
 140                 .fw_max_len     = 0x7c0000,
 141                 .kernel_la      = 0x80060000,
 142                 .kernel_ep      = 0x80060000,
 143                 .rootfs_ofs     = 0x140000,
 144         }, {
 145                 .id             = "8Mlzma",
 146                 .fw_max_len     = 0x7c0000,
 147                 .kernel_la      = 0x80060000,
 148                 .kernel_ep      = 0x80060000,
 149                 .rootfs_ofs     = 0x100000,
 150         }, {
 151                 .id             = "16M",
 152                 .fw_max_len     = 0xf80000,
 153                 .kernel_la      = 0x80060000,
 154                 .kernel_ep      = 0x80060000,
 155                 .rootfs_ofs     = 0x140000,
 156         }, {
 157                 .id             = "16Mlzma",
 158                 .fw_max_len     = 0xf80000,
 159                 .kernel_la      = 0x80060000,
 160                 .kernel_ep      = 0x80060000,
 161                 .rootfs_ofs     = 0x100000,
 162         }, {
 163                 .id             = "16Mppc",
 164                 .fw_max_len     = 0xf80000,
 165                 .kernel_la      = 0x00000000 ,
 166                 .kernel_ep      = 0xc0000000,
 167                 .rootfs_ofs     = 0x2a0000,
 168         }, {
 169                 /* terminating entry */
 170         }
 171 };
 172
 173 /*
 174  * Message macros
 175  */
 176 #define ERR(fmt, ...) do { \
 177         fflush(0); \
 178         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 179                         progname, ## __VA_ARGS__ ); \
 180 } while (0)
 181
 182 #define ERRS(fmt, ...) do { \
 183         int save = errno; \
 184         fflush(0); \
 185         fprintf(stderr, "[%s] *** error: " fmt ": %s\n", \
 186                         progname, ## __VA_ARGS__, strerror(save)); \
 187 } while (0)
 188
 189 #define DBG(fmt, ...) do { \
 190         fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
 191 } while (0)
 192
 193 static struct flash_layout *find_layout(const char *id)
 194 {
 195         struct flash_layout *ret;
 196         struct flash_layout *l;
 197
 198         ret = NULL;
 199         for (l = layouts; l->id != NULL; l++){
 200                 if (strcasecmp(id, l->id) == 0) {
 201                         ret = l;
 202                         break;
 203                 }
 204         };
 205
 206         return ret;
 207 }
 208
 209 static void usage(int status)
 210 {
 211         fprintf(stderr, "Usage: %s [OPTIONS...]\n", progname);
 212         fprintf(stderr,
 213 "\n"
 214 "Options:\n"
 215 "  -c              use combined kernel image\n"
 216 "  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
 217 "  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
 218 "  -H <hwid>       use hardware id specified with <hwid>\n"
 219 "  -W <hwrev>      use hardware revision specified with <hwrev>\n"
 220 "  -F <id>         use flash layout specified with <id>\n"
 221 "  -k <file>       read kernel image from the file <file>\n"
 222 "  -r <file>       read rootfs image from the file <file>\n"
 223 "  -a <align>      align the rootfs start on an <align> bytes boundary\n"
 224 "  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
 225 "  -o <file>       write output to the file <file>\n"
 226 "  -s              strip padding from the end of the image\n"
 227 "  -S              ignore firmware size limit (only for combined images)\n"
 228 "  -j              add jffs2 end-of-filesystem markers\n"
 229 "  -N <vendor>     set image vendor to <vendor>\n"
 230 "  -V <version>    set image version to <version>\n"
 231 "  -v <version>    set firmware version to <version>\n"
 232 "  -m <version>    set header version to <version>\n"
 233 "  -i <file>       inspect given firmware file <file>\n"
 234 "  -x              extract kernel and rootfs while inspecting (requires -i)\n"
 235 "  -X <size>       reserve <size> bytes in the firmware image (hexval prefixed with 0x)\n"
 236 "  -h              show this screen\n"
 237         );
 238
 239         exit(status);
 240 }
 241
 242 static void get_md5(const char *data, int size, uint8_t *md5)
 243 {
 244         MD5_CTX ctx;
 245
 246         MD5_Init(&ctx);
 247         MD5_Update(&ctx, data, size);
 248         MD5_Final(md5, &ctx);
 249 }
 250
 251 static int get_file_stat(struct file_info *fdata)
 252 {
 253         struct stat st;
 254         int res;
 255
 256         if (fdata->file_name == NULL)
 257                 return 0;
 258
 259         res = stat(fdata->file_name, &st);
 260         if (res){
 261                 ERRS("stat failed on %s", fdata->file_name);
 262                 return res;
 263         }
 264
 265         fdata->file_size = st.st_size;
 266         return 0;
 267 }
 268
 269 static int read_to_buf(const struct file_info *fdata, char *buf)
 270 {
 271         FILE *f;
 272         int ret = EXIT_FAILURE;
 273
 274         f = fopen(fdata->file_name, "r");
 275         if (f == NULL) {
 276                 ERRS("could not open \"%s\" for reading", fdata->file_name);
 277                 goto out;
 278         }
 279
 280         errno = 0;
 281         fread(buf, fdata->file_size, 1, f);
 282         if (errno != 0) {
 283                 ERRS("unable to read from file \"%s\"", fdata->file_name);
 284                 goto out_close;
 285         }
 286
 287         ret = EXIT_SUCCESS;
 288
 289  out_close:
 290         fclose(f);
 291  out:
 292         return ret;
 293 }
 294
 295 static int check_options(void)
 296 {
 297         int ret;
 298         int exceed_bytes;
 299
 300         if (inspect_info.file_name) {
 301                 ret = get_file_stat(&inspect_info);
 302                 if (ret)
 303                         return ret;
 304
 305                 return 0;
 306         } else if (extract) {
 307                 ERR("no firmware for inspection specified");
 308                 return -1;
 309         }
 310
 311         if (opt_hw_id == NULL) {
 312                 ERR("hardware id not specified");
 313                 return -1;
 314         }
 315         hw_id = strtoul(opt_hw_id, NULL, 0);
 316
 317         if (layout_id == NULL) {
 318                 ERR("flash layout is not specified");
 319                 return -1;
 320         }
 321
 322         if (opt_hw_rev)
 323                 hw_rev = strtoul(opt_hw_rev, NULL, 0);
 324         else
 325                 hw_rev = 1;
 326
 327         layout = find_layout(layout_id);
 328         if (layout == NULL) {
 329                 ERR("unknown flash layout \"%s\"", layout_id);
 330                 return -1;
 331         }
 332
 333         if (!kernel_la)
 334                 kernel_la = layout->kernel_la;
 335         if (!kernel_ep)
 336                 kernel_ep = layout->kernel_ep;
 337         if (!rootfs_ofs)
 338                 rootfs_ofs = layout->rootfs_ofs;
 339
 340         if (reserved_space > layout->fw_max_len) {
 341                 ERR("reserved space is not valid");
 342                 return -1;
 343         }
 344
 345         fw_max_len = layout->fw_max_len - reserved_space;
 346
 347         if (kernel_info.file_name == NULL) {
 348                 ERR("no kernel image specified");
 349                 return -1;
 350         }
 351
 352         ret = get_file_stat(&kernel_info);
 353         if (ret)
 354                 return ret;
 355
 356         kernel_len = kernel_info.file_size;
 357
 358         if (combined) {
 359                 exceed_bytes = kernel_info.file_size - (fw_max_len - sizeof(struct fw_header));
 360                 if (exceed_bytes > 0) {
 361                         if (!ignore_size) {
 362                                 ERR("kernel image is too big by %i bytes", exceed_bytes);
 363                                 return -1;
 364                         }
 365                         layout->fw_max_len = sizeof(struct fw_header) +
 366                                              kernel_info.file_size +
 367                                              reserved_space;
 368                 }
 369         } else {
 370                 if (rootfs_info.file_name == NULL) {
 371                         ERR("no rootfs image specified");
 372                         return -1;
 373                 }
 374
 375                 ret = get_file_stat(&rootfs_info);
 376                 if (ret)
 377                         return ret;
 378
 379                 if (rootfs_align) {
 380                         kernel_len += sizeof(struct fw_header);
 381                         kernel_len = ALIGN(kernel_len, rootfs_align);
 382                         kernel_len -= sizeof(struct fw_header);
 383
 384                         DBG("kernel length aligned to %u", kernel_len);
 385
 386                         exceed_bytes = kernel_len + rootfs_info.file_size - (fw_max_len - sizeof(struct fw_header));
 387                         if (exceed_bytes > 0) {
 388                                 ERR("images are too big by %i bytes", exceed_bytes);
 389                                 return -1;
 390                         }
 391                 } else {
 392                         exceed_bytes = kernel_info.file_size - (rootfs_ofs - sizeof(struct fw_header));
 393                         if (exceed_bytes > 0) {
 394                                 ERR("kernel image is too big by %i bytes", exceed_bytes);
 395                                 return -1;
 396                         }
 397
 398                         exceed_bytes = rootfs_info.file_size - (fw_max_len - rootfs_ofs);
 399                         if (exceed_bytes > 0) {
 400                                 ERR("rootfs image is too big by %i bytes", exceed_bytes);
 401                                 return -1;
 402                         }
 403                 }
 404         }
 405
 406         if (ofname == NULL) {
 407                 ERR("no output file specified");
 408                 return -1;
 409         }
 410
 411         ret = sscanf(fw_ver, "%d.%d.%d", &fw_ver_hi, &fw_ver_mid, &fw_ver_lo);
 412         if (ret != 3) {
 413                 ERR("invalid firmware version '%s'", fw_ver);
 414                 return -1;
 415         }
 416
 417         if (opt_hdr_ver == 1) {
 418                 hdr_ver = HEADER_VERSION_V1;
 419         } else if (opt_hdr_ver == 2) {
 420                 hdr_ver = HEADER_VERSION_V2;
 421         } else {
 422                 ERR("invalid header version '%u'", opt_hdr_ver);
 423                 return -1;
 424         }
 425
 426         return 0;
 427 }
 428
 429 static void fill_header(char *buf, int len)
 430 {
 431         struct fw_header *hdr = (struct fw_header *)buf;
 432
 433         memset(hdr, 0, sizeof(struct fw_header));
 434
 435         hdr->version = htonl(hdr_ver);
 436         strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
 437         strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
 438         hdr->hw_id = htonl(hw_id);
 439         hdr->hw_rev = htonl(hw_rev);
 440
 441         if (boot_info.file_size == 0)
 442                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
 443         else
 444                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
 445
 446         hdr->kernel_la = htonl(kernel_la);
 447         hdr->kernel_ep = htonl(kernel_ep);
 448         hdr->fw_length = htonl(layout->fw_max_len);
 449         hdr->kernel_ofs = htonl(sizeof(struct fw_header));
 450         hdr->kernel_len = htonl(kernel_len);
 451         if (!combined) {
 452                 hdr->rootfs_ofs = htonl(rootfs_ofs);
 453                 hdr->rootfs_len = htonl(rootfs_info.file_size);
 454         }
 455
 456         hdr->ver_hi = htons(fw_ver_hi);
 457         hdr->ver_mid = htons(fw_ver_mid);
 458         hdr->ver_lo = htons(fw_ver_lo);
 459
 460         get_md5(buf, len, hdr->md5sum1);
 461 }
 462
 463 static int pad_jffs2(char *buf, int currlen)
 464 {
 465         int len;
 466         uint32_t pad_mask;
 467
 468         len = currlen;
 469         pad_mask = (64 * 1024);
 470         while ((len < layout->fw_max_len) && (pad_mask != 0)) {
 471                 uint32_t mask;
 472                 int i;
 473
 474                 for (i = 10; i < 32; i++) {
 475                         mask = 1 << i;
 476                         if (pad_mask & mask)
 477                                 break;
 478                 }
 479
 480                 len = ALIGN(len, mask);
 481
 482                 for (i = 10; i < 32; i++) {
 483                         mask = 1 << i;
 484                         if ((len & (mask - 1)) == 0)
 485                                 pad_mask &= ~mask;
 486                 }
 487
 488                 for (i = 0; i < sizeof(jffs2_eof_mark); i++)
 489                         buf[len + i] = jffs2_eof_mark[i];
 490
 491                 len += sizeof(jffs2_eof_mark);
 492         }
 493
 494         return len;
 495 }
 496
 497 static int write_fw(const char *data, int len)
 498 {
 499         FILE *f;
 500         int ret = EXIT_FAILURE;
 501
 502         f = fopen(ofname, "w");
 503         if (f == NULL) {
 504                 ERRS("could not open \"%s\" for writing", ofname);
 505                 goto out;
 506         }
 507
 508         errno = 0;
 509         fwrite(data, len, 1, f);
 510         if (errno) {
 511                 ERRS("unable to write output file");
 512                 goto out_flush;
 513         }
 514
 515         DBG("firmware file \"%s\" completed", ofname);
 516
 517         ret = EXIT_SUCCESS;
 518
 519  out_flush:
 520         fflush(f);
 521         fclose(f);
 522         if (ret != EXIT_SUCCESS) {
 523                 unlink(ofname);
 524         }
 525  out:
 526         return ret;
 527 }
 528
 529 static int build_fw(void)
 530 {
 531         int buflen;
 532         char *buf;
 533         char *p;
 534         int ret = EXIT_FAILURE;
 535         int writelen = 0;
 536
 537         buflen = layout->fw_max_len;
 538
 539         buf = malloc(buflen);
 540         if (!buf) {
 541                 ERR("no memory for buffer\n");
 542                 goto out;
 543         }
 544
 545         memset(buf, 0xff, buflen);
 546         p = buf + sizeof(struct fw_header);
 547         ret = read_to_buf(&kernel_info, p);
 548         if (ret)
 549                 goto out_free_buf;
 550
 551         writelen = sizeof(struct fw_header) + kernel_len;
 552
 553         if (!combined) {
 554                 if (rootfs_align)
 555                         p = buf + writelen;
 556                 else
 557                         p = buf + rootfs_ofs;
 558
 559                 ret = read_to_buf(&rootfs_info, p);
 560                 if (ret)
 561                         goto out_free_buf;
 562
 563                 if (rootfs_align)
 564                         writelen += rootfs_info.file_size;
 565                 else
 566                         writelen = rootfs_ofs + rootfs_info.file_size;
 567
 568                 if (add_jffs2_eof)
 569                         writelen = pad_jffs2(buf, writelen);
 570         }
 571
 572         if (!strip_padding)
 573                 writelen = buflen;
 574
 575         fill_header(buf, writelen);
 576         ret = write_fw(buf, writelen);
 577         if (ret)
 578                 goto out_free_buf;
 579
 580         ret = EXIT_SUCCESS;
 581
 582  out_free_buf:
 583         free(buf);
 584  out:
 585         return ret;
 586 }
 587
 588 /* Helper functions to inspect_fw() representing different output formats */
 589 static inline void inspect_fw_pstr(const char *label, const char *str)
 590 {
 591         printf("%-23s: %s\n", label, str);
 592 }
 593
 594 static inline void inspect_fw_phex(const char *label, uint32_t val)
 595 {
 596         printf("%-23s: 0x%08x\n", label, val);
 597 }
 598
 599 static inline void inspect_fw_phexpost(const char *label, uint32_t val, const char *post)
 600 {
 601         printf("%-23s: 0x%08x (%s)\n", label, val, post);
 602 }
 603
 604 static inline void inspect_fw_phexdec(const char *label, uint32_t val)
 605 {
 606         printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
 607 }
 608
 609 static inline void inspect_fw_pmd5sum(const char *label, const uint8_t *val, const char *text)
 610 {
 611         int i;
 612
 613         printf("%-23s:", label);
 614         for (i=0; i<MD5SUM_LEN; i++)
 615                 printf(" %02x", val[i]);
 616         printf(" %s\n", text);
 617 }
 618
 619 static int inspect_fw(void)
 620 {
 621         char *buf;
 622         struct fw_header *hdr;
 623         uint8_t md5sum[MD5SUM_LEN];
 624         int ret = EXIT_FAILURE;
 625
 626         buf = malloc(inspect_info.file_size);
 627         if (!buf) {
 628                 ERR("no memory for buffer!\n");
 629                 goto out;
 630         }
 631
 632         ret = read_to_buf(&inspect_info, buf);
 633         if (ret)
 634                 goto out_free_buf;
 635         hdr = (struct fw_header *)buf;
 636
 637         inspect_fw_pstr("File name", inspect_info.file_name);
 638         inspect_fw_phexdec("File size", inspect_info.file_size);
 639
 640         if ((ntohl(hdr->version) != HEADER_VERSION_V1) &&
 641             (ntohl(hdr->version) != HEADER_VERSION_V2)) {
 642                 ERR("file does not seem to have V1/V2 header!\n");
 643                 goto out_free_buf;
 644         }
 645
 646         inspect_fw_phexdec("Version 1 Header size", sizeof(struct fw_header));
 647
 648         if (ntohl(hdr->unk1) != 0)
 649                 inspect_fw_phexdec("Unknown value 1", hdr->unk1);
 650
 651         memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
 652         if (ntohl(hdr->boot_len) == 0)
 653                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
 654         else
 655                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
 656         get_md5(buf, inspect_info.file_size, hdr->md5sum1);
 657
 658         if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
 659                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
 660                 inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
 661         } else {
 662                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
 663         }
 664         if (ntohl(hdr->unk2) != 0)
 665                 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
 666         inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
 667                            "(purpose yet unknown, unchecked here)");
 668         if (ntohl(hdr->unk3) != 0)
 669                 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
 670
 671         printf("\n");
 672
 673         inspect_fw_pstr("Vendor name", hdr->vendor_name);
 674         inspect_fw_pstr("Firmware version", hdr->fw_version);
 675         inspect_fw_phex("Hardware ID", ntohl(hdr->hw_id));
 676         inspect_fw_phex("Hardware Revision", ntohl(hdr->hw_rev));
 677
 678         printf("\n");
 679
 680         inspect_fw_phexdec("Kernel data offset",
 681                            ntohl(hdr->kernel_ofs));
 682         inspect_fw_phexdec("Kernel data length",
 683                            ntohl(hdr->kernel_len));
 684         inspect_fw_phex("Kernel load address",
 685                         ntohl(hdr->kernel_la));
 686         inspect_fw_phex("Kernel entry point",
 687                         ntohl(hdr->kernel_ep));
 688         inspect_fw_phexdec("Rootfs data offset",
 689                            ntohl(hdr->rootfs_ofs));
 690         inspect_fw_phexdec("Rootfs data length",
 691                            ntohl(hdr->rootfs_len));
 692         inspect_fw_phexdec("Boot loader data offset",
 693                            ntohl(hdr->boot_ofs));
 694         inspect_fw_phexdec("Boot loader data length",
 695                            ntohl(hdr->boot_len));
 696         inspect_fw_phexdec("Total firmware length",
 697                            ntohl(hdr->fw_length));
 698
 699         if (extract) {
 700                 FILE *fp;
 701                 char *filename;
 702
 703                 printf("\n");
 704
 705                 filename = malloc(strlen(inspect_info.file_name) + 8);
 706                 sprintf(filename, "%s-kernel", inspect_info.file_name);
 707                 printf("Extracting kernel to \"%s\"...\n", filename);
 708                 fp = fopen(filename, "w");
 709                 if (fp) {
 710                         if (!fwrite(buf + ntohl(hdr->kernel_ofs),
 711                                     ntohl(hdr->kernel_len), 1, fp)) {
 712                                 ERR("error in fwrite(): %s", strerror(errno));
 713                         }
 714                         fclose(fp);
 715                 } else {
 716                         ERR("error in fopen(): %s", strerror(errno));
 717                 }
 718                 free(filename);
 719
 720                 filename = malloc(strlen(inspect_info.file_name) + 8);
 721                 sprintf(filename, "%s-rootfs", inspect_info.file_name);
 722                 printf("Extracting rootfs to \"%s\"...\n", filename);
 723                 fp = fopen(filename, "w");
 724                 if (fp) {
 725                         if (!fwrite(buf + ntohl(hdr->rootfs_ofs),
 726                                     ntohl(hdr->rootfs_len), 1, fp)) {
 727                                 ERR("error in fwrite(): %s", strerror(errno));
 728                         }
 729                         fclose(fp);
 730                 } else {
 731                         ERR("error in fopen(): %s", strerror(errno));
 732                 }
 733                 free(filename);
 734         }
 735
 736  out_free_buf:
 737         free(buf);
 738  out:
 739         return ret;
 740 }
 741
 742 int main(int argc, char *argv[])
 743 {
 744         int ret = EXIT_FAILURE;
 745
 746         progname = basename(argv[0]);
 747
 748         while ( 1 ) {
 749                 int c;
 750
 751                 c = getopt(argc, argv, "a:H:E:F:L:m:V:N:W:ci:k:r:R:o:xX:hsSjv:");
 752                 if (c == -1)
 753                         break;
 754
 755                 switch (c) {
 756                 case 'a':
 757                         sscanf(optarg, "0x%x", &rootfs_align);
 758                         break;
 759                 case 'H':
 760                         opt_hw_id = optarg;
 761                         break;
 762                 case 'E':
 763                         sscanf(optarg, "0x%x", &kernel_ep);
 764                         break;
 765                 case 'F':
 766                         layout_id = optarg;
 767                         break;
 768                 case 'W':
 769                         opt_hw_rev = optarg;
 770                         break;
 771                 case 'L':
 772                         sscanf(optarg, "0x%x", &kernel_la);
 773                         break;
 774                 case 'm':
 775                         sscanf(optarg, "%u", &opt_hdr_ver);
 776                         break;
 777                 case 'V':
 778                         version = optarg;
 779                         break;
 780                 case 'v':
 781                         fw_ver = optarg;
 782                         break;
 783                 case 'N':
 784                         vendor = optarg;
 785                         break;
 786                 case 'c':
 787                         combined++;
 788                         break;
 789                 case 'k':
 790                         kernel_info.file_name = optarg;
 791                         break;
 792                 case 'r':
 793                         rootfs_info.file_name = optarg;
 794                         break;
 795                 case 'R':
 796                         sscanf(optarg, "0x%x", &rootfs_ofs);
 797                         break;
 798                 case 'o':
 799                         ofname = optarg;
 800                         break;
 801                 case 's':
 802                         strip_padding = 1;
 803                         break;
 804                 case 'S':
 805                         ignore_size = 1;
 806                         break;
 807                 case 'i':
 808                         inspect_info.file_name = optarg;
 809                         break;
 810                 case 'j':
 811                         add_jffs2_eof = 1;
 812                         break;
 813                 case 'x':
 814                         extract = 1;
 815                         break;
 816                 case 'h':
 817                         usage(EXIT_SUCCESS);
 818                         break;
 819                 case 'X':
 820                         sscanf(optarg, "0x%x", &reserved_space);
 821                         break;
 822                 default:
 823                         usage(EXIT_FAILURE);
 824                         break;
 825                 }
 826         }
 827
 828         ret = check_options();
 829         if (ret)
 830                 goto out;
 831
 832         if (!inspect_info.file_name)
 833                 ret = build_fw();
 834         else
 835                 ret = inspect_fw();
 836
 837  out:
 838         return ret;
 839 }