2 * Copyright (C) 2014 Gabor Juhos <juhosg@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published
6 * by the Free Software Foundation.
14 #include <unistd.h> /* for unlink() */
16 #include <getopt.h> /* for getopt() */
21 #include <arpa/inet.h>
22 #include <netinet/in.h>
24 #define MAX_MAGIC_LEN 16
25 #define MAX_MODEL_LEN 32
26 #define MAX_VERSION_LEN 14
27 #define MAX_MTD_NAME_LEN 16
29 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
31 struct edimax_header {
32 char magic[MAX_MAGIC_LEN];
33 char model[MAX_MODEL_LEN];
35 unsigned char header_csum;
36 unsigned char data_csum;
40 char fw_version[MAX_VERSION_LEN];
42 char mtd_name[MAX_MTD_NAME_LEN];
43 } __attribute__ ((packed));
50 static char *progname;
53 static char *magic = "eDiMaX";
54 static char *fw_version = "";
55 static char *mtd_name;
57 static uint32_t start_addr;
58 static uint32_t end_addr;
59 static uint8_t image_type;
65 #define ERR(fmt, ...) do { \
67 fprintf(stderr, "[%s] *** error: " fmt "\n", \
68 progname, ## __VA_ARGS__ ); \
71 #define ERRS(fmt, ...) do { \
74 fprintf(stderr, "[%s] *** error: " fmt " (%s)\n", \
75 progname, ## __VA_ARGS__, strerror(save)); \
78 #define DBG(fmt, ...) do { \
79 fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
82 static void usage(int status)
84 FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
86 fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
90 " -e <addr> set end addr to <addr>\n"
91 " -f set force flag\n"
92 " -h show this screen\n"
93 " -i <file> read input data from the file <file>\n"
94 " -o <file> write output to the file <file>\n"
95 " -m <model> set model to <model>\n"
96 " -M <magic> set image magic to <magic>\n"
97 " -n <name> set MTD device name to <name>\n"
98 " -s <addr> set start address to <addr>\n"
99 " -t <type> set image type to <type>\n"
100 " -v <version> set firmware version to <version>\n"
107 str2u32(char *arg, uint32_t *val)
113 t = strtoul(arg, &err, 0);
114 if (errno || (err==arg) || ((err != NULL) && *err)) {
123 str2u8(char *arg, uint8_t *val)
129 t = strtoul(arg, &err, 0);
130 if (errno || (err==arg) || ((err != NULL) && *err) || (t >= 0x100)) {
138 static int get_file_size(char *name)
143 res = stat(name, &st);
145 ERRS("stat failed on %s", name);
152 static int read_to_buf(char *name, char *buf, int buflen)
155 int ret = EXIT_FAILURE;
157 f = fopen(name, "r");
159 ERRS("could not open \"%s\" for reading", name);
164 fread(buf, buflen, 1, f);
166 ERRS("unable to read from file \"%s\"", name);
178 static int check_options(void)
180 #define CHKSTR(_name, _msg) \
182 if (_name == NULL) { \
183 ERR("no %s specified", _msg); \
188 #define CHKSTRLEN(_name, _msg) \
191 CHKSTR(_name, _msg); \
192 field_len = FIELD_SIZEOF(struct edimax_header, _name) - 1; \
193 if (strlen(_name) > field_len) { \
194 ERR("'%s' is too long, max %s length is %d", \
195 _name, _msg, field_len); \
200 CHKSTR(ofname, "output file");
201 CHKSTR(ifname, "input file");
203 CHKSTRLEN(magic, "magic");
204 CHKSTRLEN(model, "model");
205 CHKSTRLEN(mtd_name, "MTD device name");
206 CHKSTRLEN(fw_version, "firware version");
208 data_size = get_file_size(ifname);
215 static int write_fw(char *data, int len)
218 int ret = EXIT_FAILURE;
220 f = fopen(ofname, "w");
222 ERRS("could not open \"%s\" for writing", ofname);
227 fwrite(data, len, 1, f);
229 ERRS("unable to write output file");
233 DBG("firmware file \"%s\" completed", ofname);
240 if (ret != EXIT_SUCCESS) {
247 static unsigned char checksum(unsigned char *p, unsigned len)
249 unsigned char csum = 0;
259 static int build_fw(void)
264 struct edimax_header *hdr;
265 int ret = EXIT_FAILURE;
267 buflen = sizeof(struct edimax_header) + data_size;
269 buf = malloc(buflen);
271 ERR("no memory for buffer\n");
275 data = buf + sizeof(struct edimax_header);
277 /* read input file */
278 ret = read_to_buf(ifname, data, data_size);
282 /* fill firmware header */
283 hdr = (struct edimax_header *)buf;
284 memset(hdr, 0, sizeof(struct edimax_header));
286 strncpy(hdr->model, model, sizeof(hdr->model));
287 strncpy(hdr->magic, magic, sizeof(hdr->magic));
288 strncpy(hdr->fw_version, fw_version, sizeof(hdr->fw_version));
289 strncpy(hdr->mtd_name, mtd_name, sizeof(hdr->mtd_name));
292 hdr->start_addr = htonl(start_addr);
293 hdr->end_addr = htonl(end_addr);
294 hdr->data_size = htonl(data_size);
295 hdr->type = image_type;
297 hdr->data_csum = checksum((unsigned char *)data, data_size);
298 hdr->header_csum = checksum((unsigned char *)hdr,
299 sizeof(struct edimax_header));
301 ret = write_fw(buf, buflen);
313 int main(int argc, char *argv[])
315 int ret = EXIT_FAILURE;
317 progname = basename(argv[0]);
322 c = getopt(argc, argv, "e:fhi:o:m:M:n:s:t:v:");
328 if (str2u32(optarg, &end_addr)) {
329 ERR("%s is invalid '%s'",
330 "end address", optarg);
356 if (str2u32(optarg, &start_addr)) {
357 ERR("%s is invalid '%s'",
358 "start address", optarg);
363 if (str2u8(optarg, &image_type)) {
364 ERR("%s is invalid '%s'",
365 "image type", optarg);
378 ret = check_options();