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@@ -37,7 +37,10 @@
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#define BPB 8 /* bits/byte */
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+#define WNDR3700_MAGIC_LEN 4
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+
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static uint32_t crc32[1<<BPB];
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+static char *magic = "3700";
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static void init_crc32()
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{
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@@ -64,7 +67,7 @@ static uint32_t crc32buf(unsigned char *buf, size_t len)
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}
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struct header {
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- uint32_t magic;
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+ unsigned char magic[WNDR3700_MAGIC_LEN];
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uint32_t crc;
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unsigned char stuff[56];
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};
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@@ -74,7 +77,7 @@ static void usage(const char *) __attribute__ (( __noreturn__ ));
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static void usage(const char *mess)
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{
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fprintf(stderr, "Error: %s\n", mess);
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- fprintf(stderr, "Usage: wndr3700 input_file output_file\n");
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+ fprintf(stderr, "Usage: wndr3700 input_file output_file [magic]\n");
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fprintf(stderr, "\n");
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exit(1);
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}
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@@ -90,9 +93,17 @@ int main(int argc, char **argv)
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// verify parameters
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- if (argc != 3)
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+ if (argc < 3)
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usage("wrong number of arguments");
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+ if (argc > 3)
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+ magic = argv[3];
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+
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+ if (strlen(magic) != WNDR3700_MAGIC_LEN) {
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+ fprintf(stderr, "Invalid magic: '%s'\n", magic);
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+ exit(1);
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+ }
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+
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// mmap input_file
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if ((fd = open(argv[1], O_RDONLY)) < 0
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|| (len = lseek(fd, 0, SEEK_END)) < 0
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@@ -110,7 +121,7 @@ int main(int argc, char **argv)
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// preload header
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memcpy(&header, input_file, sizeof(header));
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- header.magic = htonl(0x33373030); /* 3700 in ascii */
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+ memcpy(header.magic, magic, WNDR3700_MAGIC_LEN);
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header.crc = 0;
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// create a firmware image in memory and copy the input_file to it
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Gabor Juhos