tools/firmware-utils/src/mktplinkfw2.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_V2       0x02000000
  33
  34 #define HWID_TD_W8970_V1                0x89700001
  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;        /* 0x00: header version */
  45         char            fw_version[48]; /* 0x04: fw version string */
  46         uint32_t        hw_id;          /* 0x34: hardware id */
  47         uint32_t        hw_rev;         /* 0x38: FIXME: hardware revision? */
  48         uint32_t        unk1;           /* 0x3c: 0x00000000 */
  49         uint8_t         md5sum1[MD5SUM_LEN]; /* 0x40 */
  50         uint32_t        unk2;           /* 0x50: 0x00000000 */
  51         uint8_t         md5sum2[MD5SUM_LEN]; /* 0x54 */
  52         uint32_t        unk3;           /* 0x64: 0xffffffff */
  53
  54         uint32_t        kernel_la;      /* 0x68: kernel load address */
  55         uint32_t        kernel_ep;      /* 0x6c: kernel entry point */
  56         uint32_t        fw_length;      /* 0x70: total length of the image */
  57         uint32_t        kernel_ofs;     /* 0x74: kernel data offset */
  58         uint32_t        kernel_len;     /* 0x78: kernel data length */
  59         uint32_t        rootfs_ofs;     /* 0x7c: rootfs data offset */
  60         uint32_t        rootfs_len;     /* 0x80: rootfs data length */
  61         uint32_t        boot_ofs;       /* 0x84: FIXME: seems to be unused */
  62         uint32_t        boot_len;       /* 0x88: FIXME: seems to be unused */
  63         uint16_t        unk4;           /* 0x8c: 0x55aa */
  64         uint8_t         sver_hi;        /* 0x8e */
  65         uint8_t         sver_lo;        /* 0x8f */
  66         uint8_t         unk5;           /* 0x90: magic: 0xa5 */
  67         uint8_t         ver_hi;         /* 0x91 */
  68         uint8_t         ver_mid;        /* 0x92 */
  69         uint8_t         ver_lo;         /* 0x93 */
  70         uint8_t         pad[364];
  71 } __attribute__ ((packed));
  72
  73 struct flash_layout {
  74         char            *id;
  75         uint32_t        fw_max_len;
  76         uint32_t        kernel_la;
  77         uint32_t        kernel_ep;
  78         uint32_t        rootfs_ofs;
  79 };
  80
  81 struct board_info {
  82         char            *id;
  83         uint32_t        hw_id;
  84         uint32_t        hw_rev;
  85         char            *layout_id;
  86 };
  87
  88 /*
  89  * Globals
  90  */
  91 static char *ofname;
  92 static char *progname;
  93 static char *vendor = "TP-LINK Technologies";
  94 static char *version = "ver. 1.0";
  95 static char *fw_ver = "0.0.0";
  96 static char *sver = "1.0";
  97
  98 static char *board_id;
  99 static struct board_info *board;
 100 static char *layout_id;
 101 static struct flash_layout *layout;
 102 static char *opt_hw_id;
 103 static uint32_t hw_id;
 104 static char *opt_hw_rev;
 105 static uint32_t hw_rev;
 106 static int fw_ver_lo;
 107 static int fw_ver_mid;
 108 static int fw_ver_hi;
 109 static int sver_lo;
 110 static int sver_hi;
 111 static struct file_info kernel_info;
 112 static uint32_t kernel_la = 0;
 113 static uint32_t kernel_ep = 0;
 114 static uint32_t kernel_len = 0;
 115 static struct file_info rootfs_info;
 116 static uint32_t rootfs_ofs = 0;
 117 static uint32_t rootfs_align;
 118 static struct file_info boot_info;
 119 static int combined;
 120 static int strip_padding;
 121 static int add_jffs2_eof;
 122 static unsigned char jffs2_eof_mark[4] = {0xde, 0xad, 0xc0, 0xde};
 123
 124 static struct file_info inspect_info;
 125 static int extract = 0;
 126
 127 char md5salt_normal[MD5SUM_LEN] = {
 128         0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
 129         0xdc, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x37,
 130 };
 131
 132 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             = "8Mltq",
 140                 .fw_max_len     = 0x7a0000,
 141                 .kernel_la      = 0x80002000,
 142                 .kernel_ep      = 0x80002000,
 143                 .rootfs_ofs     = 0x140000,
 144         }, {
 145                 /* terminating entry */
 146         }
 147 };
 148
 149 static struct board_info boards[] = {
 150         {
 151                 .id             = "TD-W8970v1",
 152                 .hw_id          = HWID_TD_W8970_V1,
 153                 .hw_rev         = 1,
 154                 .layout_id      = "8Mltq",
 155         }, {
 156                 /* terminating entry */
 157         }
 158 };
 159
 160 /*
 161  * Message macros
 162  */
 163 #define ERR(fmt, ...) do { \
 164         fflush(0); \
 165         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 166                         progname, ## __VA_ARGS__ ); \
 167 } while (0)
 168
 169 #define ERRS(fmt, ...) do { \
 170         int save = errno; \
 171         fflush(0); \
 172         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 173                         progname, ## __VA_ARGS__, strerror(save)); \
 174 } while (0)
 175
 176 #define DBG(fmt, ...) do { \
 177         fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
 178 } while (0)
 179
 180 static struct board_info *find_board(char *id)
 181 {
 182         struct board_info *ret;
 183         struct board_info *board;
 184
 185         ret = NULL;
 186         for (board = boards; board->id != NULL; board++){
 187                 if (strcasecmp(id, board->id) == 0) {
 188                         ret = board;
 189                         break;
 190                 }
 191         };
 192
 193         return ret;
 194 }
 195
 196 static struct board_info *find_board_by_hwid(uint32_t hw_id)
 197 {
 198         struct board_info *board;
 199
 200         for (board = boards; board->id != NULL; board++) {
 201                 if (hw_id == board->hw_id)
 202                         return board;
 203         };
 204
 205         return NULL;
 206 }
 207
 208 static struct flash_layout *find_layout(char *id)
 209 {
 210         struct flash_layout *ret;
 211         struct flash_layout *l;
 212
 213         ret = NULL;
 214         for (l = layouts; l->id != NULL; l++){
 215                 if (strcasecmp(id, l->id) == 0) {
 216                         ret = l;
 217                         break;
 218                 }
 219         };
 220
 221         return ret;
 222 }
 223
 224 static void usage(int status)
 225 {
 226         FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
 227         struct board_info *board;
 228
 229         fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
 230         fprintf(stream,
 231 "\n"
 232 "Options:\n"
 233 "  -B <board>      create image for the board specified with <board>\n"
 234 "  -c              use combined kernel image\n"
 235 "  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
 236 "  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
 237 "  -H <hwid>       use hardware id specified with <hwid>\n"
 238 "  -W <hwrev>      use hardware revision specified with <hwrev>\n"
 239 "  -F <id>         use flash layout specified with <id>\n"
 240 "  -k <file>       read kernel image from the file <file>\n"
 241 "  -r <file>       read rootfs image from the file <file>\n"
 242 "  -a <align>      align the rootfs start on an <align> bytes boundary\n"
 243 "  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
 244 "  -o <file>       write output to the file <file>\n"
 245 "  -s              strip padding from the end of the image\n"
 246 "  -j              add jffs2 end-of-filesystem markers\n"
 247 "  -V <version>    set image version to <version>\n"
 248 "  -v <version>    set firmware version to <version>\n"
 249 "  -y <version>    set secondary version to <version>\n"
 250 "  -i <file>       inspect given firmware file <file>\n"
 251 "  -x              extract kernel and rootfs while inspecting (requires -i)\n"
 252 "  -h              show this screen\n"
 253         );
 254
 255         exit(status);
 256 }
 257
 258 static int get_md5(char *data, int size, char *md5)
 259 {
 260         MD5_CTX ctx;
 261
 262         MD5_Init(&ctx);
 263         MD5_Update(&ctx, data, size);
 264         MD5_Final(md5, &ctx);
 265 }
 266
 267 static int get_file_stat(struct file_info *fdata)
 268 {
 269         struct stat st;
 270         int res;
 271
 272         if (fdata->file_name == NULL)
 273                 return 0;
 274
 275         res = stat(fdata->file_name, &st);
 276         if (res){
 277                 ERRS("stat failed on %s", fdata->file_name);
 278                 return res;
 279         }
 280
 281         fdata->file_size = st.st_size;
 282         return 0;
 283 }
 284
 285 static int read_to_buf(struct file_info *fdata, char *buf)
 286 {
 287         FILE *f;
 288         int ret = EXIT_FAILURE;
 289
 290         f = fopen(fdata->file_name, "r");
 291         if (f == NULL) {
 292                 ERRS("could not open \"%s\" for reading", fdata->file_name);
 293                 goto out;
 294         }
 295
 296         errno = 0;
 297         fread(buf, fdata->file_size, 1, f);
 298         if (errno != 0) {
 299                 ERRS("unable to read from file \"%s\"", fdata->file_name);
 300                 goto out_close;
 301         }
 302
 303         ret = EXIT_SUCCESS;
 304
 305  out_close:
 306         fclose(f);
 307  out:
 308         return ret;
 309 }
 310
 311 static int check_options(void)
 312 {
 313         int ret;
 314
 315         if (inspect_info.file_name) {
 316                 ret = get_file_stat(&inspect_info);
 317                 if (ret)
 318                         return ret;
 319
 320                 return 0;
 321         } else if (extract) {
 322                 ERR("no firmware for inspection specified");
 323                 return -1;
 324         }
 325
 326         if (board_id == NULL && opt_hw_id == NULL) {
 327                 ERR("either board or hardware id must be specified");
 328                 return -1;
 329         }
 330
 331         if (board_id) {
 332                 board = find_board(board_id);
 333                 if (board == NULL) {
 334                         ERR("unknown/unsupported board id \"%s\"", board_id);
 335                         return -1;
 336                 }
 337                 if (layout_id == NULL)
 338                         layout_id = board->layout_id;
 339
 340                 hw_id = board->hw_id;
 341                 hw_rev = board->hw_rev;
 342         } else {
 343                 if (layout_id == NULL) {
 344                         ERR("flash layout is not specified");
 345                         return -1;
 346                 }
 347                 hw_id = strtoul(opt_hw_id, NULL, 0);
 348
 349                 if (opt_hw_rev)
 350                         hw_rev = strtoul(opt_hw_rev, NULL, 0);
 351                 else
 352                         hw_rev = 1;
 353         }
 354
 355         layout = find_layout(layout_id);
 356         if (layout == NULL) {
 357                 ERR("unknown flash layout \"%s\"", layout_id);
 358                 return -1;
 359         }
 360
 361         if (!kernel_la)
 362                 kernel_la = layout->kernel_la;
 363         if (!kernel_ep)
 364                 kernel_ep = layout->kernel_ep;
 365         if (!rootfs_ofs)
 366                 rootfs_ofs = layout->rootfs_ofs;
 367
 368         if (kernel_info.file_name == NULL) {
 369                 ERR("no kernel image specified");
 370                 return -1;
 371         }
 372
 373         ret = get_file_stat(&kernel_info);
 374         if (ret)
 375                 return ret;
 376
 377         kernel_len = kernel_info.file_size;
 378
 379         if (combined) {
 380                 if (kernel_info.file_size >
 381                     layout->fw_max_len - sizeof(struct fw_header)) {
 382                         ERR("kernel image is too big");
 383                         return -1;
 384                 }
 385         } else {
 386                 if (rootfs_info.file_name == NULL) {
 387                         ERR("no rootfs image specified");
 388                         return -1;
 389                 }
 390
 391                 ret = get_file_stat(&rootfs_info);
 392                 if (ret)
 393                         return ret;
 394
 395                 if (rootfs_align) {
 396                         kernel_len += sizeof(struct fw_header);
 397                         kernel_len = ALIGN(kernel_len, rootfs_align);
 398                         kernel_len -= sizeof(struct fw_header);
 399
 400                         DBG("kernel length aligned to %u", kernel_len);
 401
 402                         if (kernel_len + rootfs_info.file_size >
 403                             layout->fw_max_len - sizeof(struct fw_header)) {
 404                                 ERR("images are too big");
 405                                 return -1;
 406                         }
 407                 } else {
 408                         if (kernel_info.file_size >
 409                             rootfs_ofs - sizeof(struct fw_header)) {
 410                                 ERR("kernel image is too big");
 411                                 return -1;
 412                         }
 413
 414                         if (rootfs_info.file_size >
 415                             (layout->fw_max_len - rootfs_ofs)) {
 416                                 ERR("rootfs image is too big");
 417                                 return -1;
 418                         }
 419                 }
 420         }
 421
 422         if (ofname == NULL) {
 423                 ERR("no output file specified");
 424                 return -1;
 425         }
 426
 427         ret = sscanf(fw_ver, "%d.%d.%d", &fw_ver_hi, &fw_ver_mid, &fw_ver_lo);
 428         if (ret != 3) {
 429                 ERR("invalid firmware version '%s'", fw_ver);
 430                 return -1;
 431         }
 432
 433         ret = sscanf(sver, "%d.%d", &sver_hi, &sver_lo);
 434         if (ret != 2) {
 435                 ERR("invalid secondary version '%s'", sver);
 436                 return -1;
 437         }
 438
 439         return 0;
 440 }
 441
 442 static void fill_header(char *buf, int len)
 443 {
 444         struct fw_header *hdr = (struct fw_header *)buf;
 445         unsigned ver_len;
 446
 447         memset(hdr, '\xff', sizeof(struct fw_header));
 448
 449         hdr->version = htonl(HEADER_VERSION_V2);
 450         ver_len = strlen(version);
 451         if (ver_len > (sizeof(hdr->fw_version) - 1))
 452                 ver_len = sizeof(hdr->fw_version) - 1;
 453
 454         memcpy(hdr->fw_version, version, ver_len);
 455         hdr->fw_version[ver_len] = 0;
 456
 457         hdr->hw_id = htonl(hw_id);
 458         hdr->hw_rev = htonl(hw_rev);
 459
 460         if (boot_info.file_size == 0) {
 461                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
 462                 hdr->boot_ofs = htonl(0);
 463                 hdr->boot_len = htonl(0);
 464         } else {
 465                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
 466                 hdr->boot_ofs = htonl(rootfs_ofs + rootfs_info.file_size);
 467                 hdr->boot_len = htonl(rootfs_info.file_size);
 468         }
 469
 470         hdr->kernel_la = htonl(kernel_la);
 471         hdr->kernel_ep = htonl(kernel_ep);
 472         hdr->fw_length = htonl(layout->fw_max_len);
 473         hdr->kernel_ofs = htonl(sizeof(struct fw_header));
 474         hdr->kernel_len = htonl(kernel_len);
 475         if (!combined) {
 476                 hdr->rootfs_ofs = htonl(rootfs_ofs);
 477                 hdr->rootfs_len = htonl(rootfs_info.file_size);
 478         }
 479
 480         hdr->boot_ofs = htonl(0);
 481         hdr->boot_len = htonl(boot_info.file_size);
 482
 483         hdr->unk1 = htonl(0);
 484         hdr->unk2 = htonl(0);
 485         hdr->unk3 = htonl(0xffffffff);
 486         hdr->unk4 = htons(0x55aa);
 487         hdr->unk5 = 0xa5;
 488
 489         hdr->sver_hi = sver_hi;
 490         hdr->sver_lo = sver_lo;
 491
 492         hdr->ver_hi = fw_ver_hi;
 493         hdr->ver_mid = fw_ver_mid;
 494         hdr->ver_lo = fw_ver_lo;
 495
 496         get_md5(buf, len, hdr->md5sum1);
 497 }
 498
 499 static int pad_jffs2(char *buf, int currlen)
 500 {
 501         int len;
 502         uint32_t pad_mask;
 503
 504         len = currlen;
 505         pad_mask = (64 * 1024);
 506         while ((len < layout->fw_max_len) && (pad_mask != 0)) {
 507                 uint32_t mask;
 508                 int i;
 509
 510                 for (i = 10; i < 32; i++) {
 511                         mask = 1 << i;
 512                         if (pad_mask & mask)
 513                                 break;
 514                 }
 515
 516                 len = ALIGN(len, mask);
 517
 518                 for (i = 10; i < 32; i++) {
 519                         mask = 1 << i;
 520                         if ((len & (mask - 1)) == 0)
 521                                 pad_mask &= ~mask;
 522                 }
 523
 524                 for (i = 0; i < sizeof(jffs2_eof_mark); i++)
 525                         buf[len + i] = jffs2_eof_mark[i];
 526
 527                 len += sizeof(jffs2_eof_mark);
 528         }
 529
 530         return len;
 531 }
 532
 533 static int write_fw(char *data, int len)
 534 {
 535         FILE *f;
 536         int ret = EXIT_FAILURE;
 537
 538         f = fopen(ofname, "w");
 539         if (f == NULL) {
 540                 ERRS("could not open \"%s\" for writing", ofname);
 541                 goto out;
 542         }
 543
 544         errno = 0;
 545         fwrite(data, len, 1, f);
 546         if (errno) {
 547                 ERRS("unable to write output file");
 548                 goto out_flush;
 549         }
 550
 551         DBG("firmware file \"%s\" completed", ofname);
 552
 553         ret = EXIT_SUCCESS;
 554
 555  out_flush:
 556         fflush(f);
 557         fclose(f);
 558         if (ret != EXIT_SUCCESS) {
 559                 unlink(ofname);
 560         }
 561  out:
 562         return ret;
 563 }
 564
 565 static int build_fw(void)
 566 {
 567         int buflen;
 568         char *buf;
 569         char *p;
 570         int ret = EXIT_FAILURE;
 571         int writelen = 0;
 572
 573         buflen = layout->fw_max_len;
 574
 575         buf = malloc(buflen);
 576         if (!buf) {
 577                 ERR("no memory for buffer\n");
 578                 goto out;
 579         }
 580
 581         memset(buf, 0xff, buflen);
 582         p = buf + sizeof(struct fw_header);
 583         ret = read_to_buf(&kernel_info, p);
 584         if (ret)
 585                 goto out_free_buf;
 586
 587         writelen = sizeof(struct fw_header) + kernel_len;
 588
 589         if (!combined) {
 590                 if (rootfs_align)
 591                         p = buf + writelen;
 592                 else
 593                         p = buf + rootfs_ofs;
 594
 595                 ret = read_to_buf(&rootfs_info, p);
 596                 if (ret)
 597                         goto out_free_buf;
 598
 599                 if (rootfs_align)
 600                         writelen += rootfs_info.file_size;
 601                 else
 602                         writelen = rootfs_ofs + rootfs_info.file_size;
 603
 604                 if (add_jffs2_eof)
 605                         writelen = pad_jffs2(buf, writelen);
 606         }
 607
 608         if (!strip_padding)
 609                 writelen = buflen;
 610
 611         fill_header(buf, writelen);
 612         ret = write_fw(buf, writelen);
 613         if (ret)
 614                 goto out_free_buf;
 615
 616         ret = EXIT_SUCCESS;
 617
 618  out_free_buf:
 619         free(buf);
 620  out:
 621         return ret;
 622 }
 623
 624 /* Helper functions to inspect_fw() representing different output formats */
 625 static inline void inspect_fw_pstr(char *label, char *str)
 626 {
 627         printf("%-23s: %s\n", label, str);
 628 }
 629
 630 static inline void inspect_fw_phex(char *label, uint32_t val)
 631 {
 632         printf("%-23s: 0x%08x\n", label, val);
 633 }
 634
 635 static inline void inspect_fw_phexpost(char *label,
 636                                        uint32_t val, char *post)
 637 {
 638         printf("%-23s: 0x%08x (%s)\n", label, val, post);
 639 }
 640
 641 static inline void inspect_fw_phexdef(char *label,
 642                                       uint32_t val, uint32_t defval)
 643 {
 644         printf("%-23s: 0x%08x                  ", label, val);
 645
 646         if (val == defval)
 647                 printf("(== OpenWrt default)\n");
 648         else
 649                 printf("(OpenWrt default: 0x%08x)\n", defval);
 650 }
 651
 652 static inline void inspect_fw_phexexp(char *label,
 653                                       uint32_t val, uint32_t expval)
 654 {
 655         printf("%-23s: 0x%08x ", label, val);
 656
 657         if (val == expval)
 658                 printf("(ok)\n");
 659         else
 660                 printf("(expected: 0x%08x)\n", expval);
 661 }
 662
 663 static inline void inspect_fw_phexdec(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_phexdecdef(char *label,
 669                                          uint32_t val, uint32_t defval)
 670 {
 671         printf("%-23s: 0x%08x / %8u bytes ", label, val, val);
 672
 673         if (val == defval)
 674                 printf("(== OpenWrt default)\n");
 675         else
 676                 printf("(OpenWrt default: 0x%08x)\n", defval);
 677 }
 678
 679 static inline void inspect_fw_pmd5sum(char *label, uint8_t *val, char *text)
 680 {
 681         int i;
 682
 683         printf("%-23s:", label);
 684         for (i=0; i<MD5SUM_LEN; i++)
 685                 printf(" %02x", val[i]);
 686         printf(" %s\n", text);
 687 }
 688
 689 static int inspect_fw(void)
 690 {
 691         char *buf;
 692         struct fw_header *hdr;
 693         uint8_t md5sum[MD5SUM_LEN];
 694         struct board_info *board;
 695         int ret = EXIT_FAILURE;
 696
 697         buf = malloc(inspect_info.file_size);
 698         if (!buf) {
 699                 ERR("no memory for buffer!\n");
 700                 goto out;
 701         }
 702
 703         ret = read_to_buf(&inspect_info, buf);
 704         if (ret)
 705                 goto out_free_buf;
 706         hdr = (struct fw_header *)buf;
 707
 708         inspect_fw_pstr("File name", inspect_info.file_name);
 709         inspect_fw_phexdec("File size", inspect_info.file_size);
 710
 711         if (ntohl(hdr->version) != HEADER_VERSION_V2) {
 712                 ERR("file does not seem to have V2 header!\n");
 713                 goto out_free_buf;
 714         }
 715
 716         inspect_fw_phexdec("Version 2 Header size", sizeof(struct fw_header));
 717
 718         if (ntohl(hdr->unk1) != 0)
 719                 inspect_fw_phexdec("Unknown value 1", hdr->unk1);
 720
 721         memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
 722         if (ntohl(hdr->boot_len) == 0)
 723                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
 724         else
 725                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
 726         get_md5(buf, inspect_info.file_size, hdr->md5sum1);
 727
 728         if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
 729                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
 730                 inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
 731         } else {
 732                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
 733         }
 734         if (ntohl(hdr->unk2) != 0)
 735                 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
 736         inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
 737                            "(purpose yet unknown, unchecked here)");
 738
 739         if (ntohl(hdr->unk3) != 0xffffffff)
 740                 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
 741
 742         if (ntohs(hdr->unk4) != 0x55aa)
 743                 inspect_fw_phexdec("Unknown value 4", hdr->unk4);
 744
 745         if (hdr->unk5 != 0xa5)
 746                 inspect_fw_phexdec("Unknown value 5", hdr->unk5);
 747
 748         printf("\n");
 749
 750         inspect_fw_pstr("Firmware version", hdr->fw_version);
 751
 752         board = find_board_by_hwid(ntohl(hdr->hw_id));
 753         if (board) {
 754                 layout = find_layout(board->layout_id);
 755                 inspect_fw_phexpost("Hardware ID",
 756                                     ntohl(hdr->hw_id), board->id);
 757                 inspect_fw_phexexp("Hardware Revision",
 758                                    ntohl(hdr->hw_rev), board->hw_rev);
 759         } else {
 760                 inspect_fw_phexpost("Hardware ID",
 761                                     ntohl(hdr->hw_id), "unknown");
 762                 inspect_fw_phex("Hardware Revision",
 763                                 ntohl(hdr->hw_rev));
 764         }
 765
 766         printf("%-23s: %d.%d.%d-%d.%d\n", "Software version",
 767                hdr->ver_hi, hdr->ver_mid, hdr->ver_lo,
 768                hdr->sver_hi, hdr->sver_lo);
 769
 770         printf("\n");
 771
 772         inspect_fw_phexdec("Kernel data offset",
 773                            ntohl(hdr->kernel_ofs));
 774         inspect_fw_phexdec("Kernel data length",
 775                            ntohl(hdr->kernel_len));
 776         if (board) {
 777                 inspect_fw_phexdef("Kernel load address",
 778                                    ntohl(hdr->kernel_la),
 779                                    layout ? layout->kernel_la : 0xffffffff);
 780                 inspect_fw_phexdef("Kernel entry point",
 781                                    ntohl(hdr->kernel_ep),
 782                                    layout ? layout->kernel_ep : 0xffffffff);
 783                 inspect_fw_phexdecdef("Rootfs data offset",
 784                                       ntohl(hdr->rootfs_ofs),
 785                                       layout ? layout->rootfs_ofs : 0xffffffff);
 786         } else {
 787                 inspect_fw_phex("Kernel load address",
 788                                 ntohl(hdr->kernel_la));
 789                 inspect_fw_phex("Kernel entry point",
 790                                 ntohl(hdr->kernel_ep));
 791                 inspect_fw_phexdec("Rootfs data offset",
 792                                    ntohl(hdr->rootfs_ofs));
 793         }
 794         inspect_fw_phexdec("Rootfs data length",
 795                            ntohl(hdr->rootfs_len));
 796         inspect_fw_phexdec("Boot loader data offset",
 797                            ntohl(hdr->boot_ofs));
 798         inspect_fw_phexdec("Boot loader data length",
 799                            ntohl(hdr->boot_len));
 800         inspect_fw_phexdec("Total firmware length",
 801                            ntohl(hdr->fw_length));
 802
 803         if (extract) {
 804                 FILE *fp;
 805                 char *filename;
 806
 807                 printf("\n");
 808
 809                 filename = malloc(strlen(inspect_info.file_name) + 8);
 810                 sprintf(filename, "%s-kernel", inspect_info.file_name);
 811                 printf("Extracting kernel to \"%s\"...\n", filename);
 812                 fp = fopen(filename, "w");
 813                 if (fp) {
 814                         if (!fwrite(buf + ntohl(hdr->kernel_ofs),
 815                                     ntohl(hdr->kernel_len), 1, fp)) {
 816                                 ERR("error in fwrite(): %s", strerror(errno));
 817                         }
 818                         fclose(fp);
 819                 } else {
 820                         ERR("error in fopen(): %s", strerror(errno));
 821                 }
 822                 free(filename);
 823
 824                 filename = malloc(strlen(inspect_info.file_name) + 8);
 825                 sprintf(filename, "%s-rootfs", inspect_info.file_name);
 826                 printf("Extracting rootfs to \"%s\"...\n", filename);
 827                 fp = fopen(filename, "w");
 828                 if (fp) {
 829                         if (!fwrite(buf + ntohl(hdr->rootfs_ofs),
 830                                     ntohl(hdr->rootfs_len), 1, fp)) {
 831                                 ERR("error in fwrite(): %s", strerror(errno));
 832                         }
 833                         fclose(fp);
 834                 } else {
 835                         ERR("error in fopen(): %s", strerror(errno));
 836                 }
 837                 free(filename);
 838         }
 839
 840  out_free_buf:
 841         free(buf);
 842  out:
 843         return ret;
 844 }
 845
 846 int main(int argc, char *argv[])
 847 {
 848         int ret = EXIT_FAILURE;
 849         int err;
 850
 851         FILE *outfile;
 852
 853         progname = basename(argv[0]);
 854
 855         while ( 1 ) {
 856                 int c;
 857
 858                 c = getopt(argc, argv, "a:B:H:E:F:L:V:N:W:ci:k:r:R:o:xhsjv:y:");
 859                 if (c == -1)
 860                         break;
 861
 862                 switch (c) {
 863                 case 'a':
 864                         sscanf(optarg, "0x%x", &rootfs_align);
 865                         break;
 866                 case 'B':
 867                         board_id = optarg;
 868                         break;
 869                 case 'H':
 870                         opt_hw_id = optarg;
 871                         break;
 872                 case 'E':
 873                         sscanf(optarg, "0x%x", &kernel_ep);
 874                         break;
 875                 case 'F':
 876                         layout_id = optarg;
 877                         break;
 878                 case 'W':
 879                         opt_hw_rev = optarg;
 880                         break;
 881                 case 'L':
 882                         sscanf(optarg, "0x%x", &kernel_la);
 883                         break;
 884                 case 'V':
 885                         version = optarg;
 886                         break;
 887                 case 'v':
 888                         fw_ver = optarg;
 889                         break;
 890                 case 'y':
 891                         sver = optarg;
 892                         break;
 893                 case 'N':
 894                         vendor = optarg;
 895                         break;
 896                 case 'c':
 897                         combined++;
 898                         break;
 899                 case 'k':
 900                         kernel_info.file_name = optarg;
 901                         break;
 902                 case 'r':
 903                         rootfs_info.file_name = optarg;
 904                         break;
 905                 case 'R':
 906                         sscanf(optarg, "0x%x", &rootfs_ofs);
 907                         break;
 908                 case 'o':
 909                         ofname = optarg;
 910                         break;
 911                 case 's':
 912                         strip_padding = 1;
 913                         break;
 914                 case 'i':
 915                         inspect_info.file_name = optarg;
 916                         break;
 917                 case 'j':
 918                         add_jffs2_eof = 1;
 919                         break;
 920                 case 'x':
 921                         extract = 1;
 922                         break;
 923                 case 'h':
 924                         usage(EXIT_SUCCESS);
 925                         break;
 926                 default:
 927                         usage(EXIT_FAILURE);
 928                         break;
 929                 }
 930         }
 931
 932         ret = check_options();
 933         if (ret)
 934                 goto out;
 935
 936         if (!inspect_info.file_name)
 937                 ret = build_fw();
 938         else
 939                 ret = inspect_fw();
 940
 941  out:
 942         return ret;
 943 }
 944