--- /dev/null
+/*
+ * 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 <arpa/inet.h>
+#include <netinet/in.h>
+
+#define MAX_MODEL_LEN 20
+#define MAX_SIGNATURE_LEN 30
+#define MAX_REGION_LEN 4
+#define MAX_VERSION_LEN 12
+
+#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
+
+struct file_info {
+ char *file_name; /* name of the file */
+ uint32_t file_size; /* length of the file */
+ uint32_t write_size;
+};
+
+struct img_header {
+ uint32_t checksum;
+ uint32_t image_size;
+ uint32_t kernel_size;
+ char model[MAX_MODEL_LEN];
+ char signature[MAX_SIGNATURE_LEN];
+ char region[MAX_REGION_LEN];
+ char version[MAX_VERSION_LEN];
+ unsigned char header_len;
+ unsigned char is_tgz;
+ unsigned char pad[4];
+} __attribute__ ((packed));
+
+/*
+ * Globals
+ */
+static char *ofname;
+static char *progname;
+
+static char *model;
+static char *signature;
+static char *region = "DEF";
+static char *version;
+static struct file_info kernel_info;
+static struct file_info rootfs_info;
+static uint32_t kernel_size;
+static uint32_t image_size;
+
+/*
+ * 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"
+" -k <file> read kernel image from the file <file>\n"
+" -M <model> set model to <model>\n"
+" -o <file> write output to the file <file>\n"
+" -r <file> read rootfs image from the file <file>\n"
+" -S <signature> set image signature to <signature>\n"
+" -R <region> set image region to <region>\n"
+" -V <version> set image version to <version>\n"
+" -I <size> set image size to <size>\n"
+" -K <size> set kernel size to <size>\n"
+" -h show this screen\n"
+ );
+
+ exit(status);
+}
+
+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 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;
+ fdata->write_size = fdata->file_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;
+
+#define CHKSTR(_name, _msg) \
+ do { \
+ if (_name == NULL) { \
+ ERR("no %s specified", _msg); \
+ return -1; \
+ } \
+ } while (0)
+
+#define CHKSTRLEN(_name, _msg) \
+ do { \
+ int field_len; \
+ CHKSTR(_name, _msg); \
+ field_len = FIELD_SIZEOF(struct img_header, _name) - 1; \
+ if (strlen(_name) > field_len) { \
+ ERR("%s is too long, max length is %d", \
+ _msg, field_len); \
+ return -1; \
+ } \
+ } while (0)
+
+ CHKSTRLEN(model, "model");
+ CHKSTRLEN(signature, "signature");
+ CHKSTRLEN(region, "region");
+ CHKSTRLEN(version, "version");
+ CHKSTR(ofname, "output file");
+ CHKSTR(kernel_info.file_name, "kernel image");
+ CHKSTR(rootfs_info.file_name, "rootfs image");
+
+ ret = get_file_stat(&kernel_info);
+ if (ret)
+ return ret;
+
+ ret = get_file_stat(&rootfs_info);
+ if (ret)
+ return ret;
+
+ if (kernel_size) {
+ /* override kernel size */
+ kernel_info.write_size = kernel_size;
+ }
+
+ if (image_size) {
+ if (image_size < kernel_info.write_size)
+ kernel_info.write_size = image_size;
+
+ /* override rootfs size */
+ rootfs_info.write_size = image_size - kernel_info.write_size;
+ }
+
+ if (kernel_info.file_size > kernel_info.write_size) {
+ ERR("kernel image is too big");
+ return -1;
+ }
+
+ if (rootfs_info.file_size > rootfs_info.write_size) {
+ ERR("rootfs image is too big");
+ return -1;
+ }
+
+ 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;
+ }
+
+ 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 uint32_t get_csum(unsigned char *p, uint32_t len)
+{
+ uint32_t csum = 0;
+
+ while (len--)
+ csum += *p++;
+
+ return csum;
+}
+
+static int build_fw(void)
+{
+ int buflen;
+ char *buf;
+ char *p;
+ uint32_t csum;
+ struct img_header *hdr;
+ int ret = EXIT_FAILURE;
+
+ buflen = sizeof(struct img_header) +
+ kernel_info.write_size + rootfs_info.write_size;
+
+ buf = malloc(buflen);
+ if (!buf) {
+ ERR("no memory for buffer\n");
+ goto out;
+ }
+
+ memset(buf, 0, buflen);
+
+ p = buf + sizeof(struct img_header);
+
+ /* read kernel data */
+ ret = read_to_buf(&kernel_info, p);
+ if (ret)
+ goto out_free_buf;
+
+ p += kernel_info.write_size;
+
+ /* read rootfs data */
+ ret = read_to_buf(&rootfs_info, p);
+ if (ret)
+ goto out_free_buf;
+
+ csum = get_csum((unsigned char *)(buf + sizeof(struct img_header)),
+ buflen - sizeof(struct img_header));
+
+ /* fill firmware header */
+ hdr = (struct img_header *) buf;
+
+ hdr->checksum = htonl(csum);
+ hdr->image_size = htonl(buflen - sizeof(struct img_header));
+ hdr->kernel_size = htonl(kernel_info.write_size);
+ hdr->header_len = sizeof(struct img_header);
+ strncpy(hdr->model, model, sizeof(hdr->model));
+ strncpy(hdr->signature, signature, sizeof(hdr->signature));
+ strncpy(hdr->version, version, sizeof(hdr->version));
+ strncpy(hdr->region, region, sizeof(hdr->region));
+
+ 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;
+
+ progname = basename(argv[0]);
+
+ while (1) {
+ int c;
+
+ c = getopt(argc, argv, "M:S:V:R:k:K:I:r:o:h");
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'M':
+ model = optarg;
+ break;
+ case 'S':
+ signature = optarg;
+ break;
+ case 'V':
+ version = optarg;
+ break;
+ case 'R':
+ region = optarg;
+ break;
+ case 'k':
+ kernel_info.file_name = optarg;
+ break;
+ case 'K':
+ if (str2u32(optarg, &kernel_size)) {
+ ERR("%s is invalid '%s'",
+ "kernel size", optarg);
+ goto out;
+ }
+ break;
+ case 'I':
+ if (str2u32(optarg, &image_size)) {
+ ERR("%s is invalid '%s'",
+ "image size", optarg);
+ goto out;
+ }
+ break;
+ case 'r':
+ rootfs_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 = build_fw();
+
+out:
+ return ret;
+}
+
projects / openwrt.git / commitdiff