diff options
Diffstat (limited to 'tools/firmware-utils/src')
| -rw-r--r-- | tools/firmware-utils/src/fix-u-media-header.c | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/tools/firmware-utils/src/fix-u-media-header.c b/tools/firmware-utils/src/fix-u-media-header.c new file mode 100644 index 0000000000..21f184e66d --- /dev/null +++ b/tools/firmware-utils/src/fix-u-media-header.c @@ -0,0 +1,354 @@ +/* + * Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org> + * + * 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 "cyg_crc.h" + +#include <arpa/inet.h> +#include <netinet/in.h> + +#define IH_MAGIC 0x27051956 /* Image Magic Number */ +#define IH_NMLEN 32 /* Image Name Length */ + +#define UM_MAGIC 0x55525F46 +#define UM_HEADER_LEN 12 + +/* + * all data in network byte order (aka natural aka bigendian) + */ +struct u_media_header { + uint32_t ih_magic; /* Image Header Magic Number */ + uint32_t ih_hcrc; /* Image Header CRC Checksum */ + uint32_t ih_time; /* Image Creation Timestamp */ + uint32_t ih_size; /* Image Data Size */ + uint32_t ih_load; /* Data Load Address */ + uint32_t ih_ep; /* Entry Point Address */ + uint32_t ih_dcrc; /* Image Data CRC Checksum */ + uint8_t ih_os; /* Operating System */ + uint8_t ih_arch; /* CPU architecture */ + uint8_t ih_type; /* Image Type */ + uint8_t ih_comp; /* Compression Type */ + uint8_t ih_name[IH_NMLEN - UM_HEADER_LEN]; /* Image Name */ + + uint32_t ih_UMedia_magic; /* U-Media magic number */ + uint32_t ih_UMedia_boardID; /* U-Media board ID */ + uint8_t ih_UMedia_imageType; /* U-Media image type */ + uint8_t ih_UMedia_LoadDefault; /* U-Media load to factory default setting */ + uint8_t ih_UMedia_temp1; /* U-Media didn't use this tag */ + uint8_t ih_UMedia_temp2; /* U-Media didn't use this tag */ +} __attribute__ ((packed)); + +struct if_info { + char *file_name; /* name of the file */ + uint32_t file_size; /* length of the file */ +}; + +static char *progname; +static char *ofname; +static struct if_info if_info; +static int factory_defaults; +static uint32_t board_id; +static uint8_t image_type; + +/* + * 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 " (%s)\n", \ + progname, ## __VA_ARGS__, strerror(save)); \ +} while (0) + +#define DBG(fmt, ...) do { \ + fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \ +} while (0) + +static void usage(int status) +{ + FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout; + + fprintf(stream, "Usage: %s [OPTIONS...]\n", progname); + fprintf(stream, +"\n" +"Options:\n" +" -B <board_id> set board ID to <board_id>\n" +" -i <file> read input from the file <file>\n" +" -F load factory defaults\n" +" -o <file> write output to the file <file>\n" +" -T <type> set image type to <type>\n" +" -h show this screen\n" + ); + + exit(status); +} + +static int str2u32(char *arg, uint32_t *val) +{ + char *err = NULL; + uint32_t t; + + errno=0; + t = strtoul(arg, &err, 0); + if (errno || (err==arg) || ((err != NULL) && *err)) { + return -1; + } + + *val = t; + return 0; +} + +static int str2u8(char *arg, uint8_t *val) +{ + char *err = NULL; + uint32_t t; + + errno=0; + t = strtoul(arg, &err, 0); + if (errno || (err==arg) || ((err != NULL) && *err)) { + return -1; + } + + if (t > 255) + return -1; + + *val = t; + return 0; +} + +static int get_file_stat(struct if_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 if_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 (ofname == NULL) { + ERR("no %s specified", "output file"); + return -1; + } + + if (if_info.file_name == NULL) { + ERR("no %s specified", "input file"); + return -1; + } + + ret = get_file_stat(&if_info); + if (ret) + return ret; + + return 0; +} + +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; + } + + ret = EXIT_SUCCESS; + +out_flush: + fflush(f); + fclose(f); + if (ret != EXIT_SUCCESS) { + unlink(ofname); + } +out: + return ret; +} + +static int fix_header(void) +{ + int buflen; + char *buf; + uint32_t crc, crc_orig; + struct u_media_header *hdr; + int ret = EXIT_FAILURE; + + buflen = if_info.file_size; + if (buflen < sizeof(*hdr)) { + ERR("invalid input file\n"); + return ret; + } + + buf = malloc(buflen); + if (!buf) { + ERR("no memory for buffer\n"); + goto out; + } + + ret = read_to_buf(&if_info, buf); + if (ret) + goto out_free_buf; + + hdr = (struct u_media_header *) buf; + if (ntohl(hdr->ih_magic) != IH_MAGIC) { + ERR("invalid input file, bad magic\n"); + goto out_free_buf; + } + + /* verify header CRC */ + crc_orig = ntohl(hdr->ih_hcrc); + hdr->ih_hcrc = 0; + crc = cyg_ether_crc32((unsigned char *)hdr, sizeof(*hdr)); + if (crc != crc_orig) { + ERR("invalid input file, bad header CRC\n"); + goto out_free_buf; + } + + hdr->ih_name[IH_NMLEN - UM_HEADER_LEN - 1] = '\0'; + + /* set U-Media specific fields */ + hdr->ih_UMedia_magic = htonl(UM_MAGIC); + hdr->ih_UMedia_boardID = htonl(board_id); + hdr->ih_UMedia_imageType = image_type; + hdr->ih_UMedia_LoadDefault = (factory_defaults) ? 1 : 0; + + /* update header CRC */ + crc = cyg_ether_crc32((unsigned char *)hdr, sizeof(*hdr)); + hdr->ih_hcrc = htonl(crc); + + ret = write_fw(buf, buflen); + if (ret) + goto out_free_buf; + + DBG("U-Media header fixed in \"%s\"", ofname); + + ret = EXIT_SUCCESS; + +out_free_buf: + free(buf); +out: + return ret; +} + +int main(int argc, char *argv[]) +{ + int ret = EXIT_FAILURE; + + progname = basename(argv[0]); + + while (1) { + int c; + + c = getopt(argc, argv, "B:Fi:o:T:h"); + if (c == -1) + break; + + switch (c) { + case 'B': + if (str2u32(optarg, &board_id)) { + ERR("%s is invalid '%s'", + "board ID", optarg); + goto out; + } + break; + case 'T': + if (str2u8(optarg, &image_type)) { + ERR("%s is invalid '%s'", + "image type", optarg); + goto out; + } + break; + case 'F': + factory_defaults = 1; + break; + case 'i': + if_info.file_name = optarg; + break; + case 'o': + ofname = optarg; + break; + case 'h': + usage(EXIT_SUCCESS); + break; + default: + usage(EXIT_FAILURE); + break; + } + } + + ret = check_options(); + if (ret) + goto out; + + ret = fix_header(); + +out: + return ret; +} |