1 files changed, 386 insertions, 0 deletions
diff --git a/tools/firmware-utils/src/edimax_fw_header.c b/tools/firmware-utils/src/edimax_fw_header.c
new file mode 100644
index 0000000..b85e3a1
--- /dev/null
+++ b/tools/firmware-utils/src/edimax_fw_header.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright (C) 2014 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_MAGIC_LEN		16
+#define MAX_MODEL_LEN		32
+#define MAX_VERSION_LEN		14
+#define MAX_MTD_NAME_LEN	16
+
+#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
+
+struct edimax_header {
+	char		magic[MAX_MAGIC_LEN];
+	char		model[MAX_MODEL_LEN];
+	unsigned char	force;
+	unsigned char	header_csum;
+	unsigned char	data_csum;
+	uint32_t	data_size;
+	uint32_t	start_addr;
+	uint32_t	end_addr;
+	char		fw_version[MAX_VERSION_LEN];
+	unsigned char	type;
+	char		mtd_name[MAX_MTD_NAME_LEN];
+} __attribute__ ((packed));
+
+/*
+ * Globals
+ */
+static char *ofname;
+static char *ifname;
+static char *progname;
+
+static char *model;
+static char *magic = "eDiMaX";
+static char *fw_version = "";
+static char *mtd_name;
+static int force;
+static uint32_t start_addr;
+static uint32_t end_addr;
+static uint8_t image_type;
+static int data_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"
+"  -e <addr>       set end addr to <addr>\n"
+"  -f              set force flag\n"
+"  -h              show this screen\n"
+"  -i <file>       read input data from the file <file>\n"
+"  -o <file>       write output to the file <file>\n"
+"  -m <model>      set model to <model>\n"
+"  -M <magic>      set image magic to <magic>\n"
+"  -n <name>       set MTD device name to <name>\n"
+"  -s <addr>       set start address to <addr>\n"
+"  -t <type>       set image type to <type>\n"
+"  -v <version>    set firmware version to <version>\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;
+}
+
+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) || (t >= 0x100)) {
+		return -1;
+	}
+
+	*val = t & 0xFF;
+	return 0;
+}
+
+static int get_file_size(char *name)
+{
+	struct stat st;
+	int res;
+
+	res = stat(name, &st);
+	if (res){
+		ERRS("stat failed on %s", name);
+		return -1;
+	}
+
+	return st.st_size;
+}
+
+static int read_to_buf(char *name, char *buf, int buflen)
+{
+	FILE *f;
+	int ret = EXIT_FAILURE;
+
+	f = fopen(name, "r");
+	if (f == NULL) {
+		ERRS("could not open \"%s\" for reading", name);
+		goto out;
+	}
+
+	errno = 0;
+	fread(buf, buflen, 1, f);
+	if (errno != 0) {
+		ERRS("unable to read from file \"%s\"", name);
+		goto out_close;
+	}
+
+	ret = EXIT_SUCCESS;
+
+out_close:
+	fclose(f);
+out:
+	return ret;
+}
+
+static int check_options(void)
+{
+#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 edimax_header, _name) - 1; \
+		if (strlen(_name) > field_len) { 			\
+			ERR("'%s' is too long, max %s length is %d",	\
+			    _name, _msg, field_len);			\
+			return -1;					\
+		}							\
+	} while (0)
+
+	CHKSTR(ofname, "output file");
+	CHKSTR(ifname, "input file");
+
+	CHKSTRLEN(magic, "magic");
+	CHKSTRLEN(model, "model");
+	CHKSTRLEN(mtd_name, "MTD device name");
+	CHKSTRLEN(fw_version, "firware version");
+
+	data_size = get_file_size(ifname);
+	if (data_size < 0)
+		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 unsigned char checksum(unsigned char *p, unsigned len)
+{
+	unsigned char csum = 0;
+
+	while (len--)
+		csum += *p++;
+
+	csum ^= 0xb9;
+
+	return csum;
+}
+
+static int build_fw(void)
+{
+	int buflen;
+	char *buf;
+	char *data;
+	struct edimax_header *hdr;
+	int ret = EXIT_FAILURE;
+
+	buflen = sizeof(struct edimax_header) + data_size;
+
+	buf = malloc(buflen);
+	if (!buf) {
+		ERR("no memory for buffer\n");
+		goto out;
+	}
+
+	data = buf + sizeof(struct edimax_header);
+
+	/* read input file */
+	ret = read_to_buf(ifname, data, data_size);
+	if (ret)
+		goto out_free_buf;
+
+	/* fill firmware header */
+	hdr = (struct edimax_header *)buf;
+	memset(hdr, 0, sizeof(struct edimax_header));
+
+	strncpy(hdr->model, model, sizeof(hdr->model));
+	strncpy(hdr->magic, magic, sizeof(hdr->magic));
+	strncpy(hdr->fw_version, fw_version, sizeof(hdr->fw_version));
+	strncpy(hdr->mtd_name, mtd_name, sizeof(hdr->mtd_name));
+
+	hdr->force = force;
+	hdr->start_addr = htonl(start_addr);
+	hdr->end_addr = htonl(end_addr);
+	hdr->data_size = htonl(data_size);
+	hdr->type = image_type;
+
+	hdr->data_csum = checksum((unsigned char *)data, data_size);
+	hdr->header_csum = checksum((unsigned char *)hdr,
+				    sizeof(struct edimax_header));
+
+	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, "e:fhi:o:m:M:n:s:t:v:");
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'e':
+			if (str2u32(optarg, &end_addr)) {
+				ERR("%s is invalid '%s'",
+				    "end address", optarg);
+				goto out;
+			}
+			break;
+		case 'f':
+			force = 1;
+			break;
+		case 'i':
+			ifname = optarg;
+			break;
+		case 'h':
+			usage(EXIT_SUCCESS);
+			break;
+		case 'o':
+			ofname = optarg;
+			break;
+		case 'm':
+			model = optarg;
+			break;
+		case 'M':
+			magic = optarg;
+			break;
+		case 'n':
+			mtd_name = optarg;
+			break;
+		case 's':
+			if (str2u32(optarg, &start_addr)) {
+				ERR("%s is invalid '%s'",
+				    "start address", optarg);
+				goto out;
+			}
+			break;
+		case 't':
+			if (str2u8(optarg, &image_type)) {
+				ERR("%s is invalid '%s'",
+				    "image type", optarg);
+				goto out;
+			}
+			break;
+		case 'v':
+			fw_version = optarg;
+			break;
+		default:
+			usage(EXIT_FAILURE);
+			break;
+		}
+	}
+
+	ret = check_options();
+	if (ret)
+		goto out;
+
+	ret = build_fw();
+
+out:
+	return ret;
+}