diff options
Diffstat (limited to 'tools/firmware-utils/src/mktplinkfw.c')
| -rw-r--r-- | tools/firmware-utils/src/mktplinkfw.c | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/tools/firmware-utils/src/mktplinkfw.c b/tools/firmware-utils/src/mktplinkfw.c new file mode 100644 index 0000000..3aea729 --- /dev/null +++ b/tools/firmware-utils/src/mktplinkfw.c @@ -0,0 +1,432 @@ +/* + * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> + * + * This tool was based on: + * TP-Link WR941 V2 firmware checksum fixing tool. + * Copyright (C) 2008,2009 Wang Jian <lark@linux.net.cn> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <unistd.h> /* for unlink() */ +#include <libgen.h> +#include <getopt.h> /* for getopt() */ +#include <stdarg.h> +#include <errno.h> +#include <sys/stat.h> + +#include "md5.h" + +#if (__BYTE_ORDER == __BIG_ENDIAN) +# define HOST_TO_BE32(x) (x) +# define BE32_TO_HOST(x) (x) +#else +# define HOST_TO_BE32(x) bswap_32(x) +# define BE32_TO_HOST(x) bswap_32(x) +#endif + +#define HEADER_VERSION_V1 0x01000000 +#define HWID_TL_WR941ND_V2 0x09410002 + +#define MD5SUM_LEN 16 + +struct file_info { + char *file_name; /* name of the file */ + uint32_t file_size; /* length of the file */ +}; + +struct fw_header { + uint32_t version; /* header version */ + char vendor_name[24]; + char fw_version[36]; + uint32_t hw_id; /* hardware id */ + uint32_t hw_rev; /* hardware revision */ + uint32_t unk1; + uint8_t md5sum1[MD5SUM_LEN]; + uint32_t unk2; + uint8_t md5sum2[MD5SUM_LEN]; + uint32_t unk3; + uint32_t kernel_la; /* kernel load address */ + uint32_t kernel_ep; /* kernel entry point */ + uint32_t fw_length; /* total length of the firmware */ + uint32_t kernel_ofs; /* kernel data offset */ + uint32_t kernel_len; /* kernel data length */ + uint32_t rootfs_ofs; /* rootfs data offset */ + uint32_t rootfs_len; /* rootfs data length */ + uint32_t boot_ofs; /* bootloader data offset */ + uint32_t boot_len; /* bootloader data length */ + uint8_t pad[360]; +} __attribute__ ((packed)); + +struct board_info { + char *id; + uint32_t hw_id; + uint32_t hw_rev; + uint32_t fw_max_len; + uint32_t kernel_la; + uint32_t kernel_ep; + uint32_t rootfs_ofs; +}; + +/* + * Globals + */ +static char *ofname; +static char *progname; +static char *vendor = "TP-LINK Technologies"; +static char *version = "ver. 1.0"; + +static char *board_id; +static struct board_info *board; +static struct file_info kernel_info; +static struct file_info rootfs_info; +static struct file_info boot_info; + +char md5salt_normal[MD5SUM_LEN] = { + 0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb, + 0xdd, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x38, +}; + +char md5salt_boot[MD5SUM_LEN] = { + 0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa, + 0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42, +}; + +static struct board_info boards[] = { + { + .id = "TL-WR941NDv2", + .hw_id = HWID_TL_WR941ND_V2, + .hw_rev = 2, + .fw_max_len = 0x3c0000, + .kernel_la = 0x80060000, + .kernel_ep = 0x80060000, + .rootfs_ofs = 0x120000, + }, { + /* terminating entry */ + } +}; + +/* + * Message macros + */ +#define ERR(fmt, ...) do { \ + fflush(0); \ + fprintf(stderr, "[%s] *** error: " fmt "\n", \ + progname, ## __VA_ARGS__ ); \ +} while (0) + +#define ERRS(fmt, ...) do { \ + int save = errno; \ + fflush(0); \ + fprintf(stderr, "[%s] *** error: " fmt "\n", \ + progname, ## __VA_ARGS__, strerror(save)); \ +} while (0) + +#define DBG(fmt, ...) do { \ + fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \ +} while (0) + +static struct board_info *find_board(char *id) +{ + struct board_info *ret; + struct board_info *board; + + ret = NULL; + for (board = boards; board->id != NULL; board++){ + if (strcasecmp(id, board->id) == 0) { + ret = board; + break; + } + }; + + return ret; +} + +static void usage(int status) +{ + FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout; + struct board_info *board; + + fprintf(stream, "Usage: %s [OPTIONS...]\n", progname); + fprintf(stream, +"\n" +"Options:\n" +" -B <board> create image for the board specified with <board>\n" +" -k <file> read kernel image from the file <file>\n" +" -r <file> read rootfs image from the file <file>\n" +" -o <file> write output to the file <file>\n" +" -v <version> set image version to <version>\n" +" -h show this screen\n" + ); + + exit(status); +} + +static int get_md5(char *data, int size, char *md5) +{ + MD5_CTX ctx; + + MD5_Init(&ctx); + MD5_Update(&ctx, data, size); + MD5_Final(md5, &ctx); +} + +static int get_file_stat(struct file_info *fdata) +{ + struct stat st; + int res; + + if (fdata->file_name == NULL) + return 0; + + res = stat(fdata->file_name, &st); + if (res){ + ERRS("stat failed on %s", fdata->file_name); + return res; + } + + fdata->file_size = st.st_size; + return 0; +} + +static int read_to_buf(struct file_info *fdata, char *buf) +{ + FILE *f; + int ret = EXIT_FAILURE; + + f = fopen(fdata->file_name, "r"); + if (f == NULL) { + ERRS("could not open \"%s\" for reading", fdata->file_name); + goto out; + } + + errno = 0; + fread(buf, fdata->file_size, 1, f); + if (errno != 0) { + ERRS("unable to read from file \"%s\"", fdata->file_name); + goto out_close; + } + + ret = EXIT_SUCCESS; + + out_close: + fclose(f); + out: + return ret; +} + +static int check_options(void) +{ + int ret; + + if (board_id == NULL) { + ERR("no board specified"); + return -1; + } + + board = find_board(board_id); + if (board == NULL) { + ERR("unknown/unsupported board id \"%s\"", board_id); + return -1; + } + + if (kernel_info.file_name == NULL) { + ERR("no kernel image specified"); + return -1; + } + + ret = get_file_stat(&kernel_info); + if (ret) + return ret; + + if (kernel_info.file_size > board->rootfs_ofs - sizeof(struct fw_header)) { + ERR("kernel image is too big"); + return -1; + } + + if (rootfs_info.file_name == NULL) { + ERR("no rootfs image specified"); + return -1; + } + + ret = get_file_stat(&rootfs_info); + if (ret) + return ret; + + if (rootfs_info.file_size > (board->fw_max_len - board->rootfs_ofs)) { + ERR("rootfs image is too big"); + return -1; + } + + if (ofname == NULL) { + ERR("no output file specified"); + return -1; + } + + return 0; +} + +static void fill_header(char *buf, int len) +{ + struct fw_header *hdr = (struct fw_header *)buf; + + memset(hdr, 0, sizeof(struct fw_header)); + + hdr->version = HOST_TO_BE32(HEADER_VERSION_V1); + strncpy(hdr->vendor_name, vendor, sizeof(hdr->vendor_name)); + strncpy(hdr->fw_version, version, sizeof(hdr->fw_version)); + hdr->hw_id = HOST_TO_BE32(board->hw_id); + hdr->hw_rev = HOST_TO_BE32(board->hw_rev); + + if (boot_info.file_size == 0) + memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1)); + else + memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1)); + + hdr->kernel_la = HOST_TO_BE32(board->kernel_la); + hdr->kernel_ep = HOST_TO_BE32(board->kernel_ep); + hdr->fw_length = HOST_TO_BE32(board->fw_max_len); + hdr->kernel_ofs = HOST_TO_BE32(sizeof(struct fw_header)); + hdr->kernel_len = HOST_TO_BE32(kernel_info.file_size); + hdr->rootfs_ofs = HOST_TO_BE32(board->rootfs_ofs); + hdr->rootfs_len = HOST_TO_BE32(rootfs_info.file_size); + + get_md5(buf, len, hdr->md5sum1); +} + +static int write_fw(char *data, int len) +{ + FILE *f; + int ret = EXIT_FAILURE; + + f = fopen(ofname, "w"); + if (f == NULL) { + ERRS("could not open \"%s\" for writing", ofname); + goto out; + } + + errno = 0; + fwrite(data, len, 1, f); + if (errno) { + ERRS("unable to write output file"); + goto out_flush; + } + + DBG("firmware file \"%s\" completed", ofname); + + ret = EXIT_SUCCESS; + + out_flush: + fflush(f); + fclose(f); + if (ret != EXIT_SUCCESS) { + unlink(ofname); + } + out: + return ret; +} + +static int build_fw(void) +{ + int buflen; + char *buf; + char *p; + int ret = EXIT_FAILURE; + + buflen = board->fw_max_len; + + buf = malloc(buflen); + if (!buf) { + ERR("no memory for buffer\n"); + goto out; + } + + memset(buf, 0xff, buflen); + p = buf + sizeof(struct fw_header); + ret = read_to_buf(&kernel_info, p); + if (ret) + goto out_free_buf; + + p = buf + board->rootfs_ofs; + ret = read_to_buf(&rootfs_info, p); + if (ret) + goto out_free_buf; + + fill_header(buf, buflen); + + ret = write_fw(buf, buflen); + if (ret) + goto out_free_buf; + + ret = EXIT_SUCCESS; + + out_free_buf: + free(buf); + out: + return ret; +} + +int main(int argc, char *argv[]) +{ + int ret = EXIT_FAILURE; + int err; + + FILE *outfile; + + progname = basename(argv[0]); + + while ( 1 ) { + int c; + + c = getopt(argc, argv, "B:V:N:k:r:o:v:h:"); + if (c == -1) + break; + + switch (c) { + case 'B': + board_id = optarg; + break; + case 'V': + version = optarg; + break; + case 'N': + vendor = optarg; + break; + case 'k': + kernel_info.file_name = optarg; + break; + case 'r': + rootfs_info.file_name = optarg; + break; + case 'o': + ofname = optarg; + break; + case 'v': + version = optarg; + break; + case 'h': + usage(EXIT_SUCCESS); + break; + default: + usage(EXIT_FAILURE); + break; + } + } + + ret = check_options(); + if (ret) + goto out; + + ret = build_fw(); + + out: + return ret; +} + |