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 HWID_TL_MR3020_V1       0x30200001
  34 #define HWID_TL_MR3220_V1       0x32200001
  35 #define HWID_TL_MR3220_V2       0x32200002
  36 #define HWID_TL_MR3420_V1       0x34200001
  37 #define HWID_TL_MR3420_V2       0x34200002
  38 #define HWID_TL_WA701N_V1       0x07010001
  39 #define HWID_TL_WA7510N_V1      0x75100001
  40 #define HWID_TL_WA801ND_V1      0x08010001
  41 #define HWID_TL_WA830RE_V1      0x08300010
  42 #define HWID_TL_WA830RE_V2      0x08300002
  43 #define HWID_TL_WA901ND_V1      0x09010001
  44 #define HWID_TL_WA901ND_V2      0x09010002
  45 #define HWID_TL_WDR4900_V1      0x49000001
  46 #define HWID_TL_WR703N_V1       0x07030101
  47 #define HWID_TL_WR720N_V3       0x07200103
  48 #define HWID_TL_WR741ND_V1      0x07410001
  49 #define HWID_TL_WR741ND_V4      0x07410004
  50 #define HWID_TL_WR740N_V1       0x07400001
  51 #define HWID_TL_WR740N_V3       0x07400003
  52 #define HWID_TL_WR743ND_V1      0x07430001
  53 #define HWID_TL_WR743ND_V2      0x07430002
  54 #define HWID_TL_WR841N_V1_5     0x08410002
  55 #define HWID_TL_WR841ND_V3      0x08410003
  56 #define HWID_TL_WR841ND_V5      0x08410005
  57 #define HWID_TL_WR841ND_V7      0x08410007
  58 #define HWID_TL_WR941ND_V2      0x09410002
  59 #define HWID_TL_WR941ND_V4      0x09410004
  60 #define HWID_TL_WR1043ND_V1     0x10430001
  61 #define HWID_TL_WR1041N_V2      0x10410002
  62 #define HWID_TL_WR2543N_V1      0x25430001
  63
  64 #define MD5SUM_LEN      16
  65
  66 struct file_info {
  67         char            *file_name;     /* name of the file */
  68         uint32_t        file_size;      /* length of the file */
  69 };
  70
  71 struct fw_header {
  72         uint32_t        version;        /* header version */
  73         char            vendor_name[24];
  74         char            fw_version[36];
  75         uint32_t        hw_id;          /* hardware id */
  76         uint32_t        hw_rev;         /* hardware revision */
  77         uint32_t        unk1;
  78         uint8_t         md5sum1[MD5SUM_LEN];
  79         uint32_t        unk2;
  80         uint8_t         md5sum2[MD5SUM_LEN];
  81         uint32_t        unk3;
  82         uint32_t        kernel_la;      /* kernel load address */
  83         uint32_t        kernel_ep;      /* kernel entry point */
  84         uint32_t        fw_length;      /* total length of the firmware */
  85         uint32_t        kernel_ofs;     /* kernel data offset */
  86         uint32_t        kernel_len;     /* kernel data length */
  87         uint32_t        rootfs_ofs;     /* rootfs data offset */
  88         uint32_t        rootfs_len;     /* rootfs data length */
  89         uint32_t        boot_ofs;       /* bootloader data offset */
  90         uint32_t        boot_len;       /* bootloader data length */
  91         uint16_t        ver_hi;
  92         uint16_t        ver_mid;
  93         uint16_t        ver_lo;
  94         uint8_t         pad[354];
  95 } __attribute__ ((packed));
  96
  97 struct flash_layout {
  98         char            *id;
  99         uint32_t        fw_max_len;
 100         uint32_t        kernel_la;
 101         uint32_t        kernel_ep;
 102         uint32_t        rootfs_ofs;
 103 };
 104
 105 struct board_info {
 106         char            *id;
 107         uint32_t        hw_id;
 108         uint32_t        hw_rev;
 109         char            *layout_id;
 110 };
 111
 112 /*
 113  * Globals
 114  */
 115 static char *ofname;
 116 static char *progname;
 117 static char *vendor = "TP-LINK Technologies";
 118 static char *version = "ver. 1.0";
 119 static char *fw_ver = "0.0.0";
 120
 121 static char *board_id;
 122 static struct board_info *board;
 123 static char *layout_id;
 124 static struct flash_layout *layout;
 125 static char *opt_hw_id;
 126 static uint32_t hw_id;
 127 static char *opt_hw_rev;
 128 static uint32_t hw_rev;
 129 static int fw_ver_lo;
 130 static int fw_ver_mid;
 131 static int fw_ver_hi;
 132 static struct file_info kernel_info;
 133 static uint32_t kernel_la = 0;
 134 static uint32_t kernel_ep = 0;
 135 static uint32_t kernel_len = 0;
 136 static struct file_info rootfs_info;
 137 static uint32_t rootfs_ofs = 0;
 138 static uint32_t rootfs_align;
 139 static struct file_info boot_info;
 140 static int combined;
 141 static int strip_padding;
 142 static int add_jffs2_eof;
 143 static unsigned char jffs2_eof_mark[4] = {0xde, 0xad, 0xc0, 0xde};
 144
 145 static struct file_info inspect_info;
 146 static int extract = 0;
 147
 148 char md5salt_normal[MD5SUM_LEN] = {
 149         0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
 150         0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38,
 151 };
 152
 153 char md5salt_boot[MD5SUM_LEN] = {
 154         0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
 155         0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
 156 };
 157
 158 static struct flash_layout layouts[] = {
 159         {
 160                 .id             = "4M",
 161                 .fw_max_len     = 0x3c0000,
 162                 .kernel_la      = 0x80060000,
 163                 .kernel_ep      = 0x80060000,
 164                 .rootfs_ofs     = 0x140000,
 165         }, {
 166                 .id             = "4Mlzma",
 167                 .fw_max_len     = 0x3c0000,
 168                 .kernel_la      = 0x80060000,
 169                 .kernel_ep      = 0x80060000,
 170                 .rootfs_ofs     = 0x100000,
 171         }, {
 172                 .id             = "8M",
 173                 .fw_max_len     = 0x7c0000,
 174                 .kernel_la      = 0x80060000,
 175                 .kernel_ep      = 0x80060000,
 176                 .rootfs_ofs     = 0x140000,
 177         }, {
 178                 .id             = "8Mlzma",
 179                 .fw_max_len     = 0x7c0000,
 180                 .kernel_la      = 0x80060000,
 181                 .kernel_ep      = 0x80060000,
 182                 .rootfs_ofs     = 0x100000,
 183         }, {
 184                 .id             = "16Mppc",
 185                 .fw_max_len     = 0xf80000,
 186                 .kernel_la      = 0x00000000,
 187                 .kernel_ep      = 0xc0000000,
 188                 .rootfs_ofs     = 0x2a0000,
 189         }, {
 190                 /* terminating entry */
 191         }
 192 };
 193
 194 static struct board_info boards[] = {
 195         {
 196                 .id             = "TL-MR3020v1",
 197                 .hw_id          = HWID_TL_MR3020_V1,
 198                 .hw_rev         = 1,
 199                 .layout_id      = "4Mlzma",
 200         }, {
 201                 .id             = "TL-MR3220v1",
 202                 .hw_id          = HWID_TL_MR3220_V1,
 203                 .hw_rev         = 1,
 204                 .layout_id      = "4M",
 205         }, {
 206                 .id             = "TL-MR3220v2",
 207                 .hw_id          = HWID_TL_MR3220_V2,
 208                 .hw_rev         = 1,
 209                 .layout_id      = "4Mlzma",
 210         }, {
 211                 .id             = "TL-MR3420v1",
 212                 .hw_id          = HWID_TL_MR3420_V1,
 213                 .hw_rev         = 1,
 214                 .layout_id      = "4M",
 215         }, {
 216                 .id             = "TL-MR3420v2",
 217                 .hw_id          = HWID_TL_MR3420_V2,
 218                 .hw_rev         = 1,
 219                 .layout_id      = "4Mlzma",
 220         }, {
 221                 .id             = "TL-WA701Nv1",
 222                 .hw_id          = HWID_TL_WA701N_V1,
 223                 .hw_rev         = 1,
 224                 .layout_id      = "4M",
 225         }, {
 226                 .id             = "TL-WA7510N",
 227                 .hw_id          = HWID_TL_WA7510N_V1,
 228                 .hw_rev         = 1,
 229                 .layout_id      = "4M",
 230         }, {
 231                 .id             = "TL-WA801NDv1",
 232                 .hw_id          = HWID_TL_WA801ND_V1,
 233                 .hw_rev         = 1,
 234                 .layout_id      = "4M",
 235         }, {
 236                 .id             = "TL-WA830REv1",
 237                 .hw_id          = HWID_TL_WA830RE_V1,
 238                 .hw_rev         = 1,
 239                 .layout_id      = "4M",
 240         }, {
 241                 .id             = "TL-WA830REv2",
 242                 .hw_id          = HWID_TL_WA830RE_V2,
 243                 .hw_rev         = 1,
 244                 .layout_id      = "4M",
 245         }, {
 246                 .id             = "TL-WA901NDv1",
 247                 .hw_id          = HWID_TL_WA901ND_V1,
 248                 .hw_rev         = 1,
 249                 .layout_id      = "4M",
 250         }, {
 251                 .id             = "TL-WA901NDv2",
 252                 .hw_id          = HWID_TL_WA901ND_V2,
 253                 .hw_rev         = 1,
 254                 .layout_id      = "4M",
 255         }, {
 256                 .id             = "TL-WDR4900v1",
 257                 .hw_id          = HWID_TL_WDR4900_V1,
 258                 .hw_rev         = 1,
 259                 .layout_id      = "16Mppc",
 260         }, {
 261                 .id             = "TL-WR741NDv1",
 262                 .hw_id          = HWID_TL_WR741ND_V1,
 263                 .hw_rev         = 1,
 264                 .layout_id      = "4M",
 265         }, {
 266                 .id             = "TL-WR741NDv4",
 267                 .hw_id          = HWID_TL_WR741ND_V4,
 268                 .hw_rev         = 1,
 269                 .layout_id      = "4Mlzma",
 270         }, {
 271                 .id             = "TL-WR740Nv1",
 272                 .hw_id          = HWID_TL_WR740N_V1,
 273                 .hw_rev         = 1,
 274                 .layout_id      = "4M",
 275         }, {
 276                 .id             = "TL-WR740Nv3",
 277                 .hw_id          = HWID_TL_WR740N_V3,
 278                 .hw_rev         = 1,
 279                 .layout_id      = "4M",
 280         }, {
 281                 .id             = "TL-WR743NDv1",
 282                 .hw_id          = HWID_TL_WR743ND_V1,
 283                 .hw_rev         = 1,
 284                 .layout_id      = "4M",
 285         }, {
 286                 .id             = "TL-WR743NDv2",
 287                 .hw_id          = HWID_TL_WR743ND_V2,
 288                 .hw_rev         = 1,
 289                 .layout_id      = "4Mlzma",
 290         }, {
 291                 .id             = "TL-WR841Nv1.5",
 292                 .hw_id          = HWID_TL_WR841N_V1_5,
 293                 .hw_rev         = 2,
 294                 .layout_id      = "4M",
 295         }, {
 296                 .id             = "TL-WR841NDv3",
 297                 .hw_id          = HWID_TL_WR841ND_V3,
 298                 .hw_rev         = 3,
 299                 .layout_id      = "4M",
 300         }, {
 301                 .id             = "TL-WR841NDv5",
 302                 .hw_id          = HWID_TL_WR841ND_V5,
 303                 .hw_rev         = 1,
 304                 .layout_id      = "4M",
 305         }, {
 306                 .id             = "TL-WR841NDv7",
 307                 .hw_id          = HWID_TL_WR841ND_V7,
 308                 .hw_rev         = 1,
 309                 .layout_id      = "4M",
 310         }, {
 311                 .id             = "TL-WR941NDv2",
 312                 .hw_id          = HWID_TL_WR941ND_V2,
 313                 .hw_rev         = 2,
 314                 .layout_id      = "4M",
 315         }, {
 316                 .id             = "TL-WR941NDv4",
 317                 .hw_id          = HWID_TL_WR941ND_V4,
 318                 .hw_rev         = 1,
 319                 .layout_id      = "4M",
 320         }, {
 321                 .id             = "TL-WR1041Nv2",
 322                 .hw_id          = HWID_TL_WR1041N_V2,
 323                 .hw_rev         = 1,
 324                 .layout_id      = "4Mlzma",
 325         }, {
 326                 .id             = "TL-WR1043NDv1",
 327                 .hw_id          = HWID_TL_WR1043ND_V1,
 328                 .hw_rev         = 1,
 329                 .layout_id      = "8M",
 330         }, {
 331                 .id             = "TL-WR2543Nv1",
 332                 .hw_id          = HWID_TL_WR2543N_V1,
 333                 .hw_rev         = 1,
 334                 .layout_id      = "8Mlzma",
 335         }, {
 336                 .id             = "TL-WR703Nv1",
 337                 .hw_id          = HWID_TL_WR703N_V1,
 338                 .hw_rev         = 1,
 339                 .layout_id      = "4Mlzma",
 340         }, {
 341                 .id             = "TL-WR720Nv3",
 342                 .hw_id          = HWID_TL_WR720N_V3,
 343                 .hw_rev         = 1,
 344                 .layout_id      = "4Mlzma",
 345         }, {
 346                 /* terminating entry */
 347         }
 348 };
 349
 350 /*
 351  * Message macros
 352  */
 353 #define ERR(fmt, ...) do { \
 354         fflush(0); \
 355         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 356                         progname, ## __VA_ARGS__ ); \
 357 } while (0)
 358
 359 #define ERRS(fmt, ...) do { \
 360         int save = errno; \
 361         fflush(0); \
 362         fprintf(stderr, "[%s] *** error: " fmt "\n", \
 363                         progname, ## __VA_ARGS__, strerror(save)); \
 364 } while (0)
 365
 366 #define DBG(fmt, ...) do { \
 367         fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
 368 } while (0)
 369
 370 static struct board_info *find_board(char *id)
 371 {
 372         struct board_info *ret;
 373         struct board_info *board;
 374
 375         ret = NULL;
 376         for (board = boards; board->id != NULL; board++){
 377                 if (strcasecmp(id, board->id) == 0) {
 378                         ret = board;
 379                         break;
 380                 }
 381         };
 382
 383         return ret;
 384 }
 385
 386 static struct board_info *find_board_by_hwid(uint32_t hw_id)
 387 {
 388         struct board_info *board;
 389
 390         for (board = boards; board->id != NULL; board++) {
 391                 if (hw_id == board->hw_id)
 392                         return board;
 393         };
 394
 395         return NULL;
 396 }
 397
 398 static struct flash_layout *find_layout(char *id)
 399 {
 400         struct flash_layout *ret;
 401         struct flash_layout *l;
 402
 403         ret = NULL;
 404         for (l = layouts; l->id != NULL; l++){
 405                 if (strcasecmp(id, l->id) == 0) {
 406                         ret = l;
 407                         break;
 408                 }
 409         };
 410
 411         return ret;
 412 }
 413
 414 static void usage(int status)
 415 {
 416         FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
 417         struct board_info *board;
 418
 419         fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
 420         fprintf(stream,
 421 "\n"
 422 "Options:\n"
 423 "  -B <board>      create image for the board specified with <board>\n"
 424 "  -c              use combined kernel image\n"
 425 "  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
 426 "  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
 427 "  -H <hwid>       use hardware id specified with <hwid>\n"
 428 "  -W <hwrev>      use hardware revision specified with <hwrev>\n"
 429 "  -F <id>         use flash layout specified with <id>\n"
 430 "  -k <file>       read kernel image from the file <file>\n"
 431 "  -r <file>       read rootfs image from the file <file>\n"
 432 "  -a <align>      align the rootfs start on an <align> bytes boundary\n"
 433 "  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
 434 "  -o <file>       write output to the file <file>\n"
 435 "  -s              strip padding from the end of the image\n"
 436 "  -j              add jffs2 end-of-filesystem markers\n"
 437 "  -N <vendor>     set image vendor to <vendor>\n"
 438 "  -V <version>    set image version to <version>\n"
 439 "  -v <version>    set firmware version to <version>\n"
 440 "  -i <file>       inspect given firmware file <file>\n"
 441 "  -x              extract kernel and rootfs while inspecting (requires -i)\n"
 442 "  -h              show this screen\n"
 443         );
 444
 445         exit(status);
 446 }
 447
 448 static int get_md5(char *data, int size, char *md5)
 449 {
 450         MD5_CTX ctx;
 451
 452         MD5_Init(&ctx);
 453         MD5_Update(&ctx, data, size);
 454         MD5_Final(md5, &ctx);
 455 }
 456
 457 static int get_file_stat(struct file_info *fdata)
 458 {
 459         struct stat st;
 460         int res;
 461
 462         if (fdata->file_name == NULL)
 463                 return 0;
 464
 465         res = stat(fdata->file_name, &st);
 466         if (res){
 467                 ERRS("stat failed on %s", fdata->file_name);
 468                 return res;
 469         }
 470
 471         fdata->file_size = st.st_size;
 472         return 0;
 473 }
 474
 475 static int read_to_buf(struct file_info *fdata, char *buf)
 476 {
 477         FILE *f;
 478         int ret = EXIT_FAILURE;
 479
 480         f = fopen(fdata->file_name, "r");
 481         if (f == NULL) {
 482                 ERRS("could not open \"%s\" for reading", fdata->file_name);
 483                 goto out;
 484         }
 485
 486         errno = 0;
 487         fread(buf, fdata->file_size, 1, f);
 488         if (errno != 0) {
 489                 ERRS("unable to read from file \"%s\"", fdata->file_name);
 490                 goto out_close;
 491         }
 492
 493         ret = EXIT_SUCCESS;
 494
 495  out_close:
 496         fclose(f);
 497  out:
 498         return ret;
 499 }
 500
 501 static int check_options(void)
 502 {
 503         int ret;
 504
 505         if (inspect_info.file_name) {
 506                 ret = get_file_stat(&inspect_info);
 507                 if (ret)
 508                         return ret;
 509
 510                 return 0;
 511         } else if (extract) {
 512                 ERR("no firmware for inspection specified");
 513                 return -1;
 514         }
 515
 516         if (board_id == NULL && opt_hw_id == NULL) {
 517                 ERR("either board or hardware id must be specified");
 518                 return -1;
 519         }
 520
 521         if (board_id) {
 522                 board = find_board(board_id);
 523                 if (board == NULL) {
 524                         ERR("unknown/unsupported board id \"%s\"", board_id);
 525                         return -1;
 526                 }
 527                 if (layout_id == NULL)
 528                         layout_id = board->layout_id;
 529
 530                 hw_id = board->hw_id;
 531                 hw_rev = board->hw_rev;
 532         } else {
 533                 if (layout_id == NULL) {
 534                         ERR("flash layout is not specified");
 535                         return -1;
 536                 }
 537                 hw_id = strtoul(opt_hw_id, NULL, 0);
 538
 539                 if (opt_hw_rev)
 540                         hw_rev = strtoul(opt_hw_rev, NULL, 0);
 541                 else
 542                         hw_rev = 1;
 543         }
 544
 545         layout = find_layout(layout_id);
 546         if (layout == NULL) {
 547                 ERR("unknown flash layout \"%s\"", layout_id);
 548                 return -1;
 549         }
 550
 551         if (!kernel_la)
 552                 kernel_la = layout->kernel_la;
 553         if (!kernel_ep)
 554                 kernel_ep = layout->kernel_ep;
 555         if (!rootfs_ofs)
 556                 rootfs_ofs = layout->rootfs_ofs;
 557
 558         if (kernel_info.file_name == NULL) {
 559                 ERR("no kernel image specified");
 560                 return -1;
 561         }
 562
 563         ret = get_file_stat(&kernel_info);
 564         if (ret)
 565                 return ret;
 566
 567         kernel_len = kernel_info.file_size;
 568
 569         if (combined) {
 570                 if (kernel_info.file_size >
 571                     layout->fw_max_len - sizeof(struct fw_header)) {
 572                         ERR("kernel image is too big");
 573                         return -1;
 574                 }
 575         } else {
 576                 if (rootfs_info.file_name == NULL) {
 577                         ERR("no rootfs image specified");
 578                         return -1;
 579                 }
 580
 581                 ret = get_file_stat(&rootfs_info);
 582                 if (ret)
 583                         return ret;
 584
 585                 if (rootfs_align) {
 586                         kernel_len += sizeof(struct fw_header);
 587                         kernel_len = ALIGN(kernel_len, rootfs_align);
 588                         kernel_len -= sizeof(struct fw_header);
 589
 590                         DBG("kernel length aligned to %u", kernel_len);
 591
 592                         if (kernel_len + rootfs_info.file_size >
 593                             layout->fw_max_len - sizeof(struct fw_header)) {
 594                                 ERR("images are too big");
 595                                 return -1;
 596                         }
 597                 } else {
 598                         if (kernel_info.file_size >
 599                             rootfs_ofs - sizeof(struct fw_header)) {
 600                                 ERR("kernel image is too big");
 601                                 return -1;
 602                         }
 603
 604                         if (rootfs_info.file_size >
 605                             (layout->fw_max_len - rootfs_ofs)) {
 606                                 ERR("rootfs image is too big");
 607                                 return -1;
 608                         }
 609                 }
 610         }
 611
 612         if (ofname == NULL) {
 613                 ERR("no output file specified");
 614                 return -1;
 615         }
 616
 617         ret = sscanf(fw_ver, "%d.%d.%d", &fw_ver_hi, &fw_ver_mid, &fw_ver_lo);
 618         if (ret != 3) {
 619                 ERR("invalid firmware version '%s'", fw_ver);
 620                 return -1;
 621         }
 622
 623         return 0;
 624 }
 625
 626 static void fill_header(char *buf, int len)
 627 {
 628         struct fw_header *hdr = (struct fw_header *)buf;
 629
 630         memset(hdr, 0, sizeof(struct fw_header));
 631
 632         hdr->version = htonl(HEADER_VERSION_V1);
 633         strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name));
 634         strncpy(hdr->fw_version, version, sizeof(hdr->fw_version));
 635         hdr->hw_id = htonl(hw_id);
 636         hdr->hw_rev = htonl(hw_rev);
 637
 638         if (boot_info.file_size == 0)
 639                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
 640         else
 641                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
 642
 643         hdr->kernel_la = htonl(kernel_la);
 644         hdr->kernel_ep = htonl(kernel_ep);
 645         hdr->fw_length = htonl(layout->fw_max_len);
 646         hdr->kernel_ofs = htonl(sizeof(struct fw_header));
 647         hdr->kernel_len = htonl(kernel_len);
 648         if (!combined) {
 649                 hdr->rootfs_ofs = htonl(rootfs_ofs);
 650                 hdr->rootfs_len = htonl(rootfs_info.file_size);
 651         }
 652
 653         hdr->ver_hi = htons(fw_ver_hi);
 654         hdr->ver_mid = htons(fw_ver_mid);
 655         hdr->ver_lo = htons(fw_ver_lo);
 656
 657         get_md5(buf, len, hdr->md5sum1);
 658 }
 659
 660 static int pad_jffs2(char *buf, int currlen)
 661 {
 662         int len;
 663         uint32_t pad_mask;
 664
 665         len = currlen;
 666         pad_mask = (64 * 1024);
 667         while ((len < layout->fw_max_len) && (pad_mask != 0)) {
 668                 uint32_t mask;
 669                 int i;
 670
 671                 for (i = 10; i < 32; i++) {
 672                         mask = 1 << i;
 673                         if (pad_mask & mask)
 674                                 break;
 675                 }
 676
 677                 len = ALIGN(len, mask);
 678
 679                 for (i = 10; i < 32; i++) {
 680                         mask = 1 << i;
 681                         if ((len & (mask - 1)) == 0)
 682                                 pad_mask &= ~mask;
 683                 }
 684
 685                 for (i = 0; i < sizeof(jffs2_eof_mark); i++)
 686                         buf[len + i] = jffs2_eof_mark[i];
 687
 688                 len += sizeof(jffs2_eof_mark);
 689         }
 690
 691         return len;
 692 }
 693
 694 static int write_fw(char *data, int len)
 695 {
 696         FILE *f;
 697         int ret = EXIT_FAILURE;
 698
 699         f = fopen(ofname, "w");
 700         if (f == NULL) {
 701                 ERRS("could not open \"%s\" for writing", ofname);
 702                 goto out;
 703         }
 704
 705         errno = 0;
 706         fwrite(data, len, 1, f);
 707         if (errno) {
 708                 ERRS("unable to write output file");
 709                 goto out_flush;
 710         }
 711
 712         DBG("firmware file \"%s\" completed", ofname);
 713
 714         ret = EXIT_SUCCESS;
 715
 716  out_flush:
 717         fflush(f);
 718         fclose(f);
 719         if (ret != EXIT_SUCCESS) {
 720                 unlink(ofname);
 721         }
 722  out:
 723         return ret;
 724 }
 725
 726 static int build_fw(void)
 727 {
 728         int buflen;
 729         char *buf;
 730         char *p;
 731         int ret = EXIT_FAILURE;
 732         int writelen = 0;
 733
 734         buflen = layout->fw_max_len;
 735
 736         buf = malloc(buflen);
 737         if (!buf) {
 738                 ERR("no memory for buffer\n");
 739                 goto out;
 740         }
 741
 742         memset(buf, 0xff, buflen);
 743         p = buf + sizeof(struct fw_header);
 744         ret = read_to_buf(&kernel_info, p);
 745         if (ret)
 746                 goto out_free_buf;
 747
 748         writelen = sizeof(struct fw_header) + kernel_len;
 749
 750         if (!combined) {
 751                 if (rootfs_align)
 752                         p = buf + writelen;
 753                 else
 754                         p = buf + rootfs_ofs;
 755
 756                 ret = read_to_buf(&rootfs_info, p);
 757                 if (ret)
 758                         goto out_free_buf;
 759
 760                 if (rootfs_align)
 761                         writelen += rootfs_info.file_size;
 762                 else
 763                         writelen = rootfs_ofs + rootfs_info.file_size;
 764
 765                 if (add_jffs2_eof)
 766                         writelen = pad_jffs2(buf, writelen);
 767         }
 768
 769         if (!strip_padding)
 770                 writelen = buflen;
 771
 772         fill_header(buf, writelen);
 773         ret = write_fw(buf, writelen);
 774         if (ret)
 775                 goto out_free_buf;
 776
 777         ret = EXIT_SUCCESS;
 778
 779  out_free_buf:
 780         free(buf);
 781  out:
 782         return ret;
 783 }
 784
 785 /* Helper functions to inspect_fw() representing different output formats */
 786 static inline void inspect_fw_pstr(char *label, char *str)
 787 {
 788         printf("%-23s: %s\n", label, str);
 789 }
 790
 791 static inline void inspect_fw_phex(char *label, uint32_t val)
 792 {
 793         printf("%-23s: 0x%08x\n", label, val);
 794 }
 795
 796 static inline void inspect_fw_phexpost(char *label,
 797                                        uint32_t val, char *post)
 798 {
 799         printf("%-23s: 0x%08x (%s)\n", label, val, post);
 800 }
 801
 802 static inline void inspect_fw_phexdef(char *label,
 803                                       uint32_t val, uint32_t defval)
 804 {
 805         printf("%-23s: 0x%08x                  ", label, val);
 806
 807         if (val == defval)
 808                 printf("(== OpenWrt default)\n");
 809         else
 810                 printf("(OpenWrt default: 0x%08x)\n", defval);
 811 }
 812
 813 static inline void inspect_fw_phexexp(char *label,
 814                                       uint32_t val, uint32_t expval)
 815 {
 816         printf("%-23s: 0x%08x ", label, val);
 817
 818         if (val == expval)
 819                 printf("(ok)\n");
 820         else
 821                 printf("(expected: 0x%08x)\n", expval);
 822 }
 823
 824 static inline void inspect_fw_phexdec(char *label, uint32_t val)
 825 {
 826         printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
 827 }
 828
 829 static inline void inspect_fw_phexdecdef(char *label,
 830                                          uint32_t val, uint32_t defval)
 831 {
 832         printf("%-23s: 0x%08x / %8u bytes ", label, val, val);
 833
 834         if (val == defval)
 835                 printf("(== OpenWrt default)\n");
 836         else
 837                 printf("(OpenWrt default: 0x%08x)\n", defval);
 838 }
 839
 840 static inline void inspect_fw_pmd5sum(char *label, uint8_t *val, char *text)
 841 {
 842         int i;
 843
 844         printf("%-23s:", label);
 845         for (i=0; i<MD5SUM_LEN; i++)
 846                 printf(" %02x", val[i]);
 847         printf(" %s\n", text);
 848 }
 849
 850 static int inspect_fw(void)
 851 {
 852         char *buf;
 853         struct fw_header *hdr;
 854         uint8_t md5sum[MD5SUM_LEN];
 855         struct board_info *board;
 856         int ret = EXIT_FAILURE;
 857
 858         buf = malloc(inspect_info.file_size);
 859         if (!buf) {
 860                 ERR("no memory for buffer!\n");
 861                 goto out;
 862         }
 863
 864         ret = read_to_buf(&inspect_info, buf);
 865         if (ret)
 866                 goto out_free_buf;
 867         hdr = (struct fw_header *)buf;
 868
 869         inspect_fw_pstr("File name", inspect_info.file_name);
 870         inspect_fw_phexdec("File size", inspect_info.file_size);
 871
 872         if (ntohl(hdr->version) != HEADER_VERSION_V1) {
 873                 ERR("file does not seem to have V1 header!\n");
 874                 goto out_free_buf;
 875         }
 876
 877         inspect_fw_phexdec("Version 1 Header size", sizeof(struct fw_header));
 878
 879         if (ntohl(hdr->unk1) != 0)
 880                 inspect_fw_phexdec("Unknown value 1", hdr->unk1);
 881
 882         memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
 883         if (ntohl(hdr->boot_len) == 0)
 884                 memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
 885         else
 886                 memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
 887         get_md5(buf, inspect_info.file_size, hdr->md5sum1);
 888
 889         if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
 890                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
 891                 inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
 892         } else {
 893                 inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
 894         }
 895         if (ntohl(hdr->unk2) != 0)
 896                 inspect_fw_phexdec("Unknown value 2", hdr->unk2);
 897         inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
 898                            "(purpose yet unknown, unchecked here)");
 899         if (ntohl(hdr->unk3) != 0)
 900                 inspect_fw_phexdec("Unknown value 3", hdr->unk3);
 901
 902         printf("\n");
 903
 904         inspect_fw_pstr("Vendor name", hdr->vendor_name);
 905         inspect_fw_pstr("Firmware version", hdr->fw_version);
 906         board = find_board_by_hwid(ntohl(hdr->hw_id));
 907         if (board) {
 908                 layout = find_layout(board->layout_id);
 909                 inspect_fw_phexpost("Hardware ID",
 910                                     ntohl(hdr->hw_id), board->id);
 911                 inspect_fw_phexexp("Hardware Revision",
 912                                    ntohl(hdr->hw_rev), board->hw_rev);
 913         } else {
 914                 inspect_fw_phexpost("Hardware ID",
 915                                     ntohl(hdr->hw_id), "unknown");
 916                 inspect_fw_phex("Hardware Revision",
 917                                 ntohl(hdr->hw_rev));
 918         }
 919
 920         printf("\n");
 921
 922         inspect_fw_phexdec("Kernel data offset",
 923                            ntohl(hdr->kernel_ofs));
 924         inspect_fw_phexdec("Kernel data length",
 925                            ntohl(hdr->kernel_len));
 926         if (board) {
 927                 inspect_fw_phexdef("Kernel load address",
 928                                    ntohl(hdr->kernel_la),
 929                                    layout ? layout->kernel_la : 0xffffffff);
 930                 inspect_fw_phexdef("Kernel entry point",
 931                                    ntohl(hdr->kernel_ep),
 932                                    layout ? layout->kernel_ep : 0xffffffff);
 933                 inspect_fw_phexdecdef("Rootfs data offset",
 934                                       ntohl(hdr->rootfs_ofs),
 935                                       layout ? layout->rootfs_ofs : 0xffffffff);
 936         } else {
 937                 inspect_fw_phex("Kernel load address",
 938                                 ntohl(hdr->kernel_la));
 939                 inspect_fw_phex("Kernel entry point",
 940                                 ntohl(hdr->kernel_ep));
 941                 inspect_fw_phexdec("Rootfs data offset",
 942                                    ntohl(hdr->rootfs_ofs));
 943         }
 944         inspect_fw_phexdec("Rootfs data length",
 945                            ntohl(hdr->rootfs_len));
 946         inspect_fw_phexdec("Boot loader data offset",
 947                            ntohl(hdr->boot_ofs));
 948         inspect_fw_phexdec("Boot loader data length",
 949                            ntohl(hdr->boot_len));
 950         inspect_fw_phexdec("Total firmware length",
 951                            ntohl(hdr->fw_length));
 952
 953         if (extract) {
 954                 FILE *fp;
 955                 char *filename;
 956
 957                 printf("\n");
 958
 959                 filename = malloc(strlen(inspect_info.file_name) + 8);
 960                 sprintf(filename, "%s-kernel", inspect_info.file_name);
 961                 printf("Extracting kernel to \"%s\"...\n", filename);
 962                 fp = fopen(filename, "w");
 963                 if (fp) {
 964                         if (!fwrite(buf + ntohl(hdr->kernel_ofs),
 965                                     ntohl(hdr->kernel_len), 1, fp)) {
 966                                 ERR("error in fwrite(): %s", strerror(errno));
 967                         }
 968                         fclose(fp);
 969                 } else {
 970                         ERR("error in fopen(): %s", strerror(errno));
 971                 }
 972                 free(filename);
 973
 974                 filename = malloc(strlen(inspect_info.file_name) + 8);
 975                 sprintf(filename, "%s-rootfs", inspect_info.file_name);
 976                 printf("Extracting rootfs to \"%s\"...\n", filename);
 977                 fp = fopen(filename, "w");
 978                 if (fp) {
 979                         if (!fwrite(buf + ntohl(hdr->rootfs_ofs),
 980                                     ntohl(hdr->rootfs_len), 1, fp)) {
 981                                 ERR("error in fwrite(): %s", strerror(errno));
 982                         }
 983                         fclose(fp);
 984                 } else {
 985                         ERR("error in fopen(): %s", strerror(errno));
 986                 }
 987                 free(filename);
 988         }
 989
 990  out_free_buf:
 991         free(buf);
 992  out:
 993         return ret;
 994 }
 995
 996 int main(int argc, char *argv[])
 997 {
 998         int ret = EXIT_FAILURE;
 999         int err;
1000
1001         FILE *outfile;
1002
1003         progname = basename(argv[0]);
1004
1005         while ( 1 ) {
1006                 int c;
1007
1008                 c = getopt(argc, argv, "a:B:H:E:F:L:V:N:W:ci:k:r:R:o:xhsjv:");
1009                 if (c == -1)
1010                         break;
1011
1012                 switch (c) {
1013                 case 'a':
1014                         sscanf(optarg, "0x%x", &rootfs_align);
1015                         break;
1016                 case 'B':
1017                         board_id = optarg;
1018                         break;
1019                 case 'H':
1020                         opt_hw_id = optarg;
1021                         break;
1022                 case 'E':
1023                         sscanf(optarg, "0x%x", &kernel_ep);
1024                         break;
1025                 case 'F':
1026                         layout_id = optarg;
1027                         break;
1028                 case 'W':
1029                         opt_hw_rev = optarg;
1030                         break;
1031                 case 'L':
1032                         sscanf(optarg, "0x%x", &kernel_la);
1033                         break;
1034                 case 'V':
1035                         version = optarg;
1036                         break;
1037                 case 'v':
1038                         fw_ver = optarg;
1039                         break;
1040                 case 'N':
1041                         vendor = optarg;
1042                         break;
1043                 case 'c':
1044                         combined++;
1045                         break;
1046                 case 'k':
1047                         kernel_info.file_name = optarg;
1048                         break;
1049                 case 'r':
1050                         rootfs_info.file_name = optarg;
1051                         break;
1052                 case 'R':
1053                         sscanf(optarg, "0x%x", &rootfs_ofs);
1054                         break;
1055                 case 'o':
1056                         ofname = optarg;
1057                         break;
1058                 case 's':
1059                         strip_padding = 1;
1060                         break;
1061                 case 'i':
1062                         inspect_info.file_name = optarg;
1063                         break;
1064                 case 'j':
1065                         add_jffs2_eof = 1;
1066                         break;
1067                 case 'x':
1068                         extract = 1;
1069                         break;
1070                 case 'h':
1071                         usage(EXIT_SUCCESS);
1072                         break;
1073                 default:
1074                         usage(EXIT_FAILURE);
1075                         break;
1076                 }
1077         }
1078
1079         ret = check_options();
1080         if (ret)
1081                 goto out;
1082
1083         if (!inspect_info.file_name)
1084                 ret = build_fw();
1085         else
1086                 ret = inspect_fw();
1087
1088  out:
1089         return ret;
1090 }
1091