10 #if !defined(__BYTE_ORDER)
11 #error "Unknown byte order"
14 #if __BYTE_ORDER == __BIG_ENDIAN
15 #define cpu_to_be32(x) (x)
16 #elif __BYTE_ORDER == __LITTLE_ENDIAN
17 #define cpu_to_be32(x) bswap_32(x)
19 #error "Unsupported endianness"
25 #define DBG(...) {printf(__VA_ARGS__); }
30 #define ERR(...) {printf(__VA_ARGS__); }
33 * Fw Header Layout for Netgear / Sercomm devices (bytes)
35 * Size : 512 bytes + zipped image size
42 * swVer : 55-62 uint32_t in BE
44 * ChkSum : 511 Inverse value of the full image checksum while this location is 0x00
46 static const char* magic
= "sErCoMm"; /* 7 */
47 static const unsigned char version
[4] = { 0x00, 0x01, 0x00, 0x00 };
48 static const int header_sz
= 512;
49 static const int footer_sz
= 71;
51 static int is_header
= 1;
54 char* file_name
; /* name of the file */
55 char* file_data
; /* data of the file in memory */
56 u_int32_t file_size
; /* length of the file */
59 static u_int8_t
getCheckSum(char* data
, int len
) {
64 ERR("Invalid pointer provided!\n");
68 for (i
= 0; i
< len
; i
++) {
76 * read file into buffer
77 * add space for header/footer
79 static int copyToOutputBuf(struct file_info
* finfo
) {
87 if (!finfo
|| !finfo
->file_name
) {
88 ERR("Invalid pointer provided!\n");
92 DBG("Opening file: %s\n", finfo
->file_name
);
94 if (!(fp
= fopen(finfo
->file_name
, "rb"))) {
95 ERR("Error opening file: %s\n", finfo
->file_name
);
101 fseek(fp
, 0L, SEEK_END
);
106 ERR("Error getting filesize: %s\n", finfo
->file_name
);
112 extra_sz
= header_sz
;
116 extra_sz
= footer_sz
;
121 DBG("Filesize: %i\n", file_sz
);
122 finfo
->file_size
= file_sz
+ extra_sz
;
124 if (!(finfo
->file_data
= malloc(finfo
->file_size
))) {
125 ERR("Out of memory!\n");
130 /* init header/footer bytes */
131 memset(finfo
->file_data
+ hdr_pos
, 0, extra_sz
);
133 /* read file and take care of leading header if exists */
134 if (fread(finfo
->file_data
+ img_pos
, 1, file_sz
, fp
) != file_sz
) {
135 ERR("Error reading file %s\n", finfo
->file_name
);
140 DBG("File: read successful\n");
146 static int writeFile(struct file_info
* finfo
) {
149 if (!finfo
|| !finfo
->file_name
) {
150 ERR("Invalid pointer provided!\n");
154 DBG("Opening file: %s\n", finfo
->file_name
);
156 if (!(fp
= fopen(finfo
->file_name
, "w"))) {
157 ERR("Error opening file: %s\n", finfo
->file_name
);
161 DBG("Writing file: %s\n", finfo
->file_name
);
163 if (fwrite(finfo
->file_data
, 1, finfo
->file_size
, fp
) != finfo
->file_size
) {
164 ERR("Wanted to write, but something went wrong!\n");
173 static void usage(char* argv
[]) {
174 printf("Usage: %s [OPTIONS...]\n"
177 " -f add sercom footer (if absent, header)\n"
178 " -b <hwid> use hardware id specified with <hwid> (ASCII)\n"
179 " -r <hwrev> use hardware revision specified with <hwrev> (ASCII)\n"
180 " -v <version> set image version to <version> (decimal, hex or octal notation)\n"
181 " -i <file> input file\n"
185 int main(int argc
, char* argv
[]) {
186 struct file_info image
= { 0 };
197 c
= getopt(argc
, argv
, "b:i:r:v:f");
209 image
.file_name
= optarg
;
215 swVer
= (u_int32_t
) strtol(optarg
, NULL
, 0);
216 swVer
= cpu_to_be32(swVer
);
224 if (!hwID
|| !hwVer
|| !image
.file_name
) {
230 * copy input to buffer, add extra space for header/footer and return
233 hdr_offset
= copyToOutputBuf(&image
);
237 DBG("Filling header: %s %s %2X %s\n", hwID
, hwVer
, swVer
, magic
);
239 strncpy(image
.file_data
+ hdr_offset
+ 0, magic
, 7);
240 memcpy(image
.file_data
+ hdr_offset
+ 7, version
, sizeof(version
));
241 strncpy(image
.file_data
+ hdr_offset
+ 11, hwID
, 34);
242 strncpy(image
.file_data
+ hdr_offset
+ 45, hwVer
, 10);
243 memcpy(image
.file_data
+ hdr_offset
+ 55, &swVer
, sizeof(swVer
));
244 strncpy(image
.file_data
+ hdr_offset
+ 63, magic
, 7);
246 /* calculate checksum and invert checksum */
248 chkSum
= getCheckSum(image
.file_data
, image
.file_size
);
249 chkSum
= (chkSum
^ 0xFF) + 1;
250 DBG("Checksum for Image: %hhX\n", chkSum
);
252 /* write checksum to header */
253 image
.file_data
[511] = (char) chkSum
;
256 /* overwrite input file */
257 if (writeFile(&image
))