From: John Crispin Date: Sun, 3 Aug 2014 11:13:58 +0000 (+0000) Subject: firmware-utils: made mkdir615h1 work for all Senao-produced devices as mksenaofw... X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=058a5c85efa40e2a84d600243abf8a26850b60c0;p=openwrt%2Fstaging%2Fzorun.git firmware-utils: made mkdir615h1 work for all Senao-produced devices as mksenaofw and cleaned up some of its formatting Signed-off-by: Forest Crossman SVN-Revision: 41962 --- diff --git a/target/linux/ramips/image/Makefile b/target/linux/ramips/image/Makefile index 20b4f6b8f3..bf95a84272 100644 --- a/target/linux/ramips/image/Makefile +++ b/target/linux/ramips/image/Makefile @@ -377,8 +377,9 @@ Image/Build/Profile/DIR-620-D1=$(call BuildFirmware/Default8M/$(1),$(1),dir-620- define BuildFirmware/DIR615H1/squashfs $(call BuildFirmware/Default4M/$(1),$(1),dir-615-h1,DIR-615-H1) - -mkdir615h1 -e $(call sysupname,$(1),dir-615-h1) \ - -o $(call imgname,$(1),dir-615-h1)-factory.bin + -mksenaofw -e $(call sysupname,$(1),dir-615-h1) \ + -o $(call imgname,$(1),dir-615-h1)-factory.bin \ + -r 0x218 -p 0x30 -t 3 endef BuildFirmware/DIR615H1/initramfs=$(call BuildFirmware/OF/initramfs,$(1),dir-615-h1,DIR-615-H1) Image/Build/Profile/DIR615H1=$(call BuildFirmware/DIR615H1/$(1),$(1)) diff --git a/tools/firmware-utils/Makefile b/tools/firmware-utils/Makefile index d5cfdaad23..4bb53cbb3f 100644 --- a/tools/firmware-utils/Makefile +++ b/tools/firmware-utils/Makefile @@ -21,7 +21,7 @@ define Host/Compile $(call cc,trx) $(call cc,motorola-bin) $(call cc,dgfirmware) - $(call cc,mkdir615h1 md5) + $(call cc,mksenaofw md5) $(call cc,trx2usr) $(call cc,ptgen) $(call cc,airlink) diff --git a/tools/firmware-utils/src/mkdir615h1.c b/tools/firmware-utils/src/mkdir615h1.c deleted file mode 100644 index d9fb35c1ec..0000000000 --- a/tools/firmware-utils/src/mkdir615h1.c +++ /dev/null @@ -1,410 +0,0 @@ -/* - * - * Copyright (C) 2012 OpenWrt.org - * Copyright (C) 2012 Mikko Hissa - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include "md5.h" - -#define HDR_LEN 0x60 -#define BUF_SIZE 0x200 -#define VERSION_SIZE 0x10 -#define MD5_SIZE 0x10 -#define PAD_SIZE 0x20 -#define DEFAULT_MAGIC 305419896 -#define DEFAULT_VERSION "123" -#define DEFAULT_VENDOR_ID 536 -#define DEFAULT_HEAD_VALUE 0x0 -#define DEFAULT_BLOCK_SIZE 65535 -#define DEFAULT_PRODUCT_ID 48 -#define DEFAULT_FIRMWARE_TYPE 0x03 - -typedef struct { - uint32_t head; - uint32_t vendor_id; - uint32_t product_id; - uint8_t version[VERSION_SIZE]; - uint32_t firmware_type; - uint32_t filesize; - uint32_t zero; - uint8_t md5sum[MD5_SIZE]; - uint8_t pad[PAD_SIZE]; - uint32_t chksum; - uint32_t magic; -} img_header; - -typedef struct { - uint8_t id; - char * name; -} firmware_type; - -typedef enum { - NONE, ENCODE, DECODE -} op_mode; - -static firmware_type FIRMWARE_TYPES[] = { - { 0x01, "bootloader" }, - { 0x02, "kernel" }, - { 0x03, "kernelapp" }, - { 0x04, "apps" }, - { 0x05, "littleapps" }, - { 0x06, "sounds" }, - { 0x07, "userconfig" }, - { 0x0a, "factoryapps" }, - { 0x0b, "odmapps" }, - { 0x0c, "langpack" } -}; - -static long get_file_size(const char *filename) -{ - FILE *fp_file; - long result; - - fp_file = fopen(filename, "r"); - if (!fp_file) - return -1; - fseek(fp_file, 0, SEEK_END); - result = ftell(fp_file); - fclose(fp_file); - return result; -} - -static int header_checksum(void *data, int len) -{ - int i; - int sum; - - sum = 0; - if (data != NULL && len >= 0) { - for (i = 0; i < len; ++i) - sum += *(unsigned char *) (data + i); - return sum; - } - - return -1; -} - -static int md5_file(const char *filename, uint8_t *dst) -{ - FILE *fp_src; - MD5_CTX ctx; - char buf[BUF_SIZE]; - size_t bytes_read; - - MD5_Init(&ctx); - - fp_src = fopen(filename, "r+b"); - if (!fp_src) { - return -1; - } - while (!feof(fp_src)) { - bytes_read = fread(&buf, 1, BUF_SIZE, fp_src); - MD5_Update(&ctx, &buf, bytes_read); - } - fclose(fp_src); - - MD5_Final(dst, &ctx); - - return 0; -} - -static int encode_image(const char *input_file_name, - const char *output_file_name, img_header *header, int block_size) -{ - char buf[BUF_SIZE]; - size_t bytes_read; - size_t pad_len = 0; - size_t bytes_avail; - - FILE *fp_input; - FILE *fp_output; - - int i; - long magic; - - fp_input = fopen(input_file_name, "r+b"); - if (!fp_input) { - fprintf(stderr, "Cannot open %s !!\n", input_file_name); - return -1; - } - - fp_output = fopen(output_file_name, "w+b"); - if (!fp_output) { - fprintf(stderr, "Cannot open %s !!\n", output_file_name); - fclose(fp_input); - return -1; - } - - header->filesize = get_file_size(input_file_name); - if (!header->filesize) { - fprintf(stderr, "File %s open/size error!\n", input_file_name); - fclose(fp_input); - fclose(fp_output); - return -1; - } - /* - * Zero padding - */ - if (block_size > 0) { - pad_len = block_size - (header->filesize % block_size); - } - - if (md5_file(input_file_name, (uint8_t *) &header->md5sum) < 0) { - fprintf(stderr, "Md5 failed on file %s\n", input_file_name); - fclose(fp_input); - fclose(fp_output); - return -1; - } - header->zero = 0; - header->chksum = header_checksum(header, HDR_LEN); - header->head = htonl(header->head); - header->vendor_id = htonl(header->vendor_id); - header->product_id = htonl(header->product_id); - header->firmware_type = htonl(header->firmware_type); - header->filesize = htonl(header->filesize); - header->chksum = htonl(header->chksum); - magic = header->magic; - header->magic = htonl(header->magic); - - fwrite(header, HDR_LEN, 1, fp_output); - - while (!feof(fp_input) || pad_len > 0) { - - if (!feof(fp_input)) - bytes_read = fread(&buf, 1, BUF_SIZE, fp_input); - else - bytes_read = 0; - - /* - * No more bytes read, start padding - */ - if (bytes_read < BUF_SIZE && pad_len > 0) { - bytes_avail = BUF_SIZE - bytes_read; - memset( &buf[bytes_read], 0, bytes_avail); - bytes_read += bytes_avail < pad_len ? bytes_avail : pad_len; - pad_len -= bytes_avail < pad_len ? bytes_avail : pad_len; - } - - for (i = 0; i < bytes_read; i++) - buf[i] ^= magic >> (i % 8) & 0xff; - fwrite(&buf, bytes_read, 1, fp_output); - } - - fclose(fp_input); - fclose(fp_output); - return 1; -} - -int decode_image(const char *input_file_name, const char *output_file_name) -{ - img_header header; - char buf[512]; - - FILE *fp_input; - FILE *fp_output; - unsigned int i; - - size_t bytes_read; - size_t bytes_written; - - fp_input = fopen(input_file_name, "r+b"); - if (!fp_input) { - fprintf(stderr, "Cannot open %s !!\n", input_file_name); - fclose(fp_input); - return -1; - } - - fp_output = fopen(output_file_name, "w+b"); - if (!fp_output) { - fprintf(stderr, "Cannot open %s !!\n", output_file_name); - fclose(fp_output); - return -1; - } - - if (fread(&header, 1, HDR_LEN, fp_input) != HDR_LEN) { - fprintf(stderr, "Incorrect header size!!"); - fclose(fp_input); - fclose(fp_output); - return -1; - } - - header.head = ntohl(header.head); - header.vendor_id = ntohl(header.vendor_id); - header.product_id = ntohl(header.product_id); - header.firmware_type = ntohl(header.firmware_type); - header.filesize = ntohl(header.filesize); - header.chksum = ntohl(header.chksum); - header.magic = ntohl(header.magic); - - bytes_written = 0; - while (!feof(fp_input)) { - - bytes_read = fread(&buf, 1, BUF_SIZE, fp_input); - for (i = 0; i < bytes_read; i++) - buf[i] ^= header.magic >> (i % 8) & 0xff; - - /* - * Handle padded source file - */ - if (bytes_written + bytes_read > header.filesize) { - bytes_read = header.filesize - bytes_written; - if (bytes_read > 0) - fwrite(&buf, bytes_read, 1, fp_output); - break; - } - - fwrite(&buf, bytes_read, 1, fp_output); - bytes_written += bytes_read; - } - - fclose(fp_input); - fclose(fp_output); - - return 1; -} - -static void usage(const char *progname, int status) -{ - FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout; - int i; - - fprintf(stream, "Usage: %s [OPTIONS...]\n", progname); - fprintf(stream, "\n" - "Options:\n" - " -e encode image file \n" - " -d decode image file \n" - " -o write output to the file \n" - " -t set image type to , defaults to 3\n" - " valid image values:\n"); - for (i = 0; i < sizeof(FIRMWARE_TYPES) / sizeof(firmware_type); i++) { - fprintf(stream, " %-5i= %s\n", FIRMWARE_TYPES[i].id, - FIRMWARE_TYPES[i].name); - } - fprintf(stream, " -v set image version to \n" - " -r set image vendor id to \n" - " -p set image product id to \n" - " -m set encoding magic \n" - " -z enable image padding to \n" - " -b set image , defaults to 65535\n" - " -h show this screen\n"); - exit(status); -} - -int main(int argc, char *argv[]) -{ - int opt; - char *input_file, *output_file, *progname = NULL; - op_mode mode = NONE; - int tmp, i, pad = 0; - int block_size; - img_header header; - - block_size = DEFAULT_BLOCK_SIZE; - progname = basename(argv[0]); - - memset(&header, 0, sizeof( img_header )); - header.magic = DEFAULT_MAGIC; - header.head = DEFAULT_HEAD_VALUE; - header.vendor_id = DEFAULT_VENDOR_ID; - header.product_id = DEFAULT_PRODUCT_ID; - header.firmware_type = DEFAULT_FIRMWARE_TYPE; - strncpy( (char*)&header.version, DEFAULT_VERSION, VERSION_SIZE - 1); - - while ((opt = getopt(argc, argv, ":o:e:d:t:v:r:p:m:b:h?z")) != -1) { - switch (opt) { - case 'e': - input_file = optarg; - mode = ENCODE; - break; - case 'd': - input_file = optarg; - mode = DECODE; - break; - case 'o': - output_file = optarg; - break; - case 't': - tmp = strtol(optarg, 0, 10); - for (i = 0; i < sizeof(FIRMWARE_TYPES) / sizeof(firmware_type); - i++) { - if (FIRMWARE_TYPES[i].id == tmp) { - header.firmware_type = FIRMWARE_TYPES[i].id; - break; - } - } - if (header.firmware_type == 0) { - fprintf(stderr, "Invalid firmware !\n"); - usage(progname, EXIT_FAILURE); - } - break; - case 'v': - strncpy( (char*)&header.version, optarg, - VERSION_SIZE - 1); - break; - case 'r': - header.vendor_id = strtol(optarg, 0, 10); - break; - case 'p': - header.product_id = strtol(optarg, 0, 10); - break; - case 'm': - header.magic = strtoul(optarg, 0, 16); - break; - case 'z': - pad = 1; - break; - case 'b': - block_size = strtol(optarg, 0, 10); - break; - case 'h': - usage(progname, EXIT_SUCCESS); - break; - case ':': - fprintf(stderr, "Option -%c requires an operand\n", optopt); - usage(progname, EXIT_FAILURE); - break; - case '?': - fprintf(stderr, "Unrecognized option: -%c\n", optopt); - usage(progname, EXIT_FAILURE); - break; - default: - usage(progname, EXIT_FAILURE); - break; - } - } - - if (input_file == NULL || output_file == NULL ) { - fprintf(stderr, "Input and output files must be defined\n"); - usage(progname, EXIT_FAILURE); - } - - switch (mode) { - case NONE: - usage(progname, EXIT_FAILURE); - break; - case ENCODE: - if (encode_image(input_file, output_file, &header, pad ? block_size : 0) - < 0) - return EXIT_FAILURE; - break; - case DECODE: - if (decode_image(input_file, output_file) < 0) - return EXIT_FAILURE; - break; - } - - return EXIT_SUCCESS; -} diff --git a/tools/firmware-utils/src/mksenaofw.c b/tools/firmware-utils/src/mksenaofw.c new file mode 100644 index 0000000000..7ea58f56d7 --- /dev/null +++ b/tools/firmware-utils/src/mksenaofw.c @@ -0,0 +1,417 @@ +/* + * + * Copyright (C) 2012 OpenWrt.org + * Copyright (C) 2012 Mikko Hissa + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include "md5.h" + +#define HDR_LEN 0x60 +#define BUF_SIZE 0x200 +#define VERSION_SIZE 0x10 +#define MD5_SIZE 0x10 +#define PAD_SIZE 0x20 + +#define DEFAULT_BLOCK_SIZE 65535 + +#define DEFAULT_HEAD_VALUE 0x0 +#define DEFAULT_VERSION "123" +#define DEFAULT_MAGIC 0x12345678 + +typedef struct { + uint32_t head; + uint32_t vendor_id; + uint32_t product_id; + uint8_t version[VERSION_SIZE]; + uint32_t firmware_type; + uint32_t filesize; + uint32_t zero; + uint8_t md5sum[MD5_SIZE]; + uint8_t pad[PAD_SIZE]; + uint32_t chksum; + uint32_t magic; +} img_header; + +typedef struct { + uint8_t id; + char * name; +} firmware_type; + +typedef enum { + NONE, ENCODE, DECODE +} op_mode; + +static firmware_type FIRMWARE_TYPES[] = { + { 0x01, "bootloader" }, + { 0x02, "kernel" }, + { 0x03, "kernelapp" }, + { 0x04, "apps" }, + /* The types below this line vary by manufacturer */ + { 0x05, "littleapps (D-Link)/factoryapps (EnGenius)" }, + { 0x06, "sounds (D-Link)/littleapps (EnGenius)" }, + { 0x07, "userconfig (D-Link)/appdata (EnGenius)" }, + { 0x08, "userconfig (EnGenius)"}, + { 0x09, "odmapps (EnGenius)"}, + { 0x0a, "factoryapps (D-Link)" }, + { 0x0b, "odmapps (D-Link)" }, + { 0x0c, "langpack (D-Link)" } +}; + +static long get_file_size(const char *filename) +{ + FILE *fp_file; + long result; + + fp_file = fopen(filename, "r"); + if (!fp_file) + return -1; + fseek(fp_file, 0, SEEK_END); + result = ftell(fp_file); + fclose(fp_file); + return result; +} + +static int header_checksum(void *data, int len) +{ + int i; + int sum; + + sum = 0; + if (data != NULL && len >= 0) { + for (i = 0; i < len; ++i) + sum += *(unsigned char *) (data + i); + return sum; + } + + return -1; +} + +static int md5_file(const char *filename, uint8_t *dst) +{ + FILE *fp_src; + MD5_CTX ctx; + char buf[BUF_SIZE]; + size_t bytes_read; + + MD5_Init(&ctx); + + fp_src = fopen(filename, "r+b"); + if (!fp_src) { + return -1; + } + while (!feof(fp_src)) { + bytes_read = fread(&buf, 1, BUF_SIZE, fp_src); + MD5_Update(&ctx, &buf, bytes_read); + } + fclose(fp_src); + + MD5_Final(dst, &ctx); + + return 0; +} + +static int encode_image(const char *input_file_name, + const char *output_file_name, img_header *header, int block_size) +{ + char buf[BUF_SIZE]; + size_t bytes_read; + size_t pad_len = 0; + size_t bytes_avail; + + FILE *fp_input; + FILE *fp_output; + + int i; + long magic; + + fp_input = fopen(input_file_name, "r+b"); + if (!fp_input) { + fprintf(stderr, "Cannot open %s !!\n", input_file_name); + return -1; + } + + fp_output = fopen(output_file_name, "w+b"); + if (!fp_output) { + fprintf(stderr, "Cannot open %s !!\n", output_file_name); + fclose(fp_input); + return -1; + } + + header->filesize = get_file_size(input_file_name); + if (!header->filesize) { + fprintf(stderr, "File %s open/size error!\n", input_file_name); + fclose(fp_input); + fclose(fp_output); + return -1; + } + /* + * Zero padding + */ + if (block_size > 0) { + pad_len = block_size - (header->filesize % block_size); + } + + if (md5_file(input_file_name, (uint8_t *) &header->md5sum) < 0) { + fprintf(stderr, "MD5 failed on file %s\n", input_file_name); + fclose(fp_input); + fclose(fp_output); + return -1; + } + header->zero = 0; + header->chksum = header_checksum(header, HDR_LEN); + header->head = htonl(header->head); + header->vendor_id = htonl(header->vendor_id); + header->product_id = htonl(header->product_id); + header->firmware_type = htonl(header->firmware_type); + header->filesize = htonl(header->filesize); + header->chksum = htonl(header->chksum); + magic = header->magic; + header->magic = htonl(header->magic); + + fwrite(header, HDR_LEN, 1, fp_output); + + while (!feof(fp_input) || pad_len > 0) { + + if (!feof(fp_input)) + bytes_read = fread(&buf, 1, BUF_SIZE, fp_input); + else + bytes_read = 0; + + /* + * No more bytes read, start padding + */ + if (bytes_read < BUF_SIZE && pad_len > 0) { + bytes_avail = BUF_SIZE - bytes_read; + memset( &buf[bytes_read], 0, bytes_avail); + bytes_read += bytes_avail < pad_len ? bytes_avail : pad_len; + pad_len -= bytes_avail < pad_len ? bytes_avail : pad_len; + } + + for (i = 0; i < bytes_read; i++) + buf[i] ^= magic >> (i % 8) & 0xff; + fwrite(&buf, bytes_read, 1, fp_output); + } + + fclose(fp_input); + fclose(fp_output); + return 1; +} + +int decode_image(const char *input_file_name, const char *output_file_name) +{ + img_header header; + char buf[BUF_SIZE]; + + FILE *fp_input; + FILE *fp_output; + unsigned int i; + + size_t bytes_read; + size_t bytes_written; + + fp_input = fopen(input_file_name, "r+b"); + if (!fp_input) { + fprintf(stderr, "Cannot open %s !!\n", input_file_name); + fclose(fp_input); + return -1; + } + + fp_output = fopen(output_file_name, "w+b"); + if (!fp_output) { + fprintf(stderr, "Cannot open %s !!\n", output_file_name); + fclose(fp_output); + return -1; + } + + if (fread(&header, 1, HDR_LEN, fp_input) != HDR_LEN) { + fprintf(stderr, "Incorrect header size!!"); + fclose(fp_input); + fclose(fp_output); + return -1; + } + + header.head = ntohl(header.head); + header.vendor_id = ntohl(header.vendor_id); + header.product_id = ntohl(header.product_id); + header.firmware_type = ntohl(header.firmware_type); + header.filesize = ntohl(header.filesize); + header.chksum = ntohl(header.chksum); + header.magic = ntohl(header.magic); + + bytes_written = 0; + while (!feof(fp_input)) { + + bytes_read = fread(&buf, 1, BUF_SIZE, fp_input); + for (i = 0; i < bytes_read; i++) + buf[i] ^= header.magic >> (i % 8) & 0xff; + + /* + * Handle padded source file + */ + if (bytes_written + bytes_read > header.filesize) { + bytes_read = header.filesize - bytes_written; + if (bytes_read > 0) + fwrite(&buf, bytes_read, 1, fp_output); + break; + } + + fwrite(&buf, bytes_read, 1, fp_output); + bytes_written += bytes_read; + } + + fclose(fp_input); + fclose(fp_output); + + return 1; +} + +static void usage(const char *progname, int status) +{ + FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout; + int i; + + fprintf(stream, "Usage: %s [OPTIONS...]\n", progname); + fprintf(stream, "\n" + "Options:\n" + " -e encode image file \n" + " -d decode image file \n" + " -o write output to the file \n" + " -t set image type to \n" + " valid image values:\n"); + for (i = 0; i < sizeof(FIRMWARE_TYPES) / sizeof(firmware_type); i++) { + fprintf(stream, " %-5i= %s\n", FIRMWARE_TYPES[i].id, + FIRMWARE_TYPES[i].name); + } + fprintf(stream, " -v set image version to \n" + " -r set image vendor id to \n" + " -p set image product id to \n" + " -m set encoding magic \n" + " -z enable image padding to \n" + " -b set image , defaults to %u\n" + " -h show this screen\n", DEFAULT_BLOCK_SIZE); + exit(status); +} + +int main(int argc, char *argv[]) +{ + int opt; + char *input_file, *output_file, *progname = NULL; + op_mode mode = NONE; + int tmp, i, pad = 0; + int block_size; + img_header header; + + block_size = DEFAULT_BLOCK_SIZE; + progname = basename(argv[0]); + + memset(&header, 0, sizeof( img_header )); + header.magic = DEFAULT_MAGIC; + header.head = DEFAULT_HEAD_VALUE; + strncpy( (char*)&header.version, DEFAULT_VERSION, VERSION_SIZE - 1); + + while ((opt = getopt(argc, argv, ":o:e:d:t:v:r:p:m:b:h?z")) != -1) { + switch (opt) { + case 'e': + input_file = optarg; + mode = ENCODE; + break; + case 'd': + input_file = optarg; + mode = DECODE; + break; + case 'o': + output_file = optarg; + break; + case 't': + tmp = strtol(optarg, 0, 10); + for (i = 0; i < sizeof(FIRMWARE_TYPES) / sizeof(firmware_type); + i++) { + if (FIRMWARE_TYPES[i].id == tmp) { + header.firmware_type = FIRMWARE_TYPES[i].id; + break; + } + } + if (header.firmware_type == 0) { + fprintf(stderr, "Invalid firmware type \"0\"!\n"); + usage(progname, EXIT_FAILURE); + } + break; + case 'v': + strncpy( (char*)&header.version, optarg, + VERSION_SIZE - 1); + break; + case 'r': + header.vendor_id = strtol(optarg, 0, 0); + break; + case 'p': + header.product_id = strtol(optarg, 0, 0); + break; + case 'm': + header.magic = strtoul(optarg, 0, 16); + break; + case 'z': + pad = 1; + break; + case 'b': + block_size = strtol(optarg, 0, 10); + break; + case 'h': + usage(progname, EXIT_SUCCESS); + break; + case ':': + fprintf(stderr, "Option -%c requires an operand\n", optopt); + usage(progname, EXIT_FAILURE); + break; + case '?': + fprintf(stderr, "Unrecognized option: -%c\n", optopt); + usage(progname, EXIT_FAILURE); + break; + default: + usage(progname, EXIT_FAILURE); + break; + } + } + + /* Check required arguments*/ + if (header.firmware_type == 0) { + fprintf(stderr, "Firmware type must be defined\n"); + usage(progname, EXIT_FAILURE); + } else if (input_file == 0 || output_file == 0) { + fprintf(stderr, "Input and output files must be defined\n"); + usage(progname, EXIT_FAILURE); + } else if (header.vendor_id == 0 || header.product_id == 0) { + fprintf(stderr, "Vendor ID and Product ID must be defined and non-zero\n"); + usage(progname, EXIT_FAILURE); + } + + switch (mode) { + case NONE: + fprintf(stderr, "A mode must be defined\n"); + usage(progname, EXIT_FAILURE); + break; + case ENCODE: + if (encode_image(input_file, output_file, &header, pad ? block_size : 0) + < 0) + return EXIT_FAILURE; + break; + case DECODE: + if (decode_image(input_file, output_file) < 0) + return EXIT_FAILURE; + break; + } + + return EXIT_SUCCESS; +}