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backfire: firmware-utils/wndr3700: allow to specify image magic via command line (backport of r24980)

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git-svn-id: svn://svn.openwrt.org/openwrt/branches/backfire@26111 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg 2011-03-13 14:53:43 +00:00
parent 589922047c
commit cd60b74186
1 changed files with 15 additions and 4 deletions
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19
tools/firmware-utils/src/wndr3700.c
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@ -37,7 +37,10 @@
#define BPB 8 /* bits/byte */
#define WNDR3700_MAGIC_LEN 4
static uint32_t crc32[1<<BPB];
static char *magic = "3700";
static void init_crc32()
{
@ -64,7 +67,7 @@ static uint32_t crc32buf(unsigned char *buf, size_t len)
}
struct header {
uint32_t magic;
unsigned char magic[WNDR3700_MAGIC_LEN];
uint32_t crc;
unsigned char stuff[56];
};
@ -74,7 +77,7 @@ static void usage(const char *) __attribute__ (( __noreturn__ ));
static void usage(const char *mess)
{
fprintf(stderr, "Error: %s\n", mess);
fprintf(stderr, "Usage: wndr3700 input_file output_file\n");
fprintf(stderr, "Usage: wndr3700 input_file output_file [magic]\n");
fprintf(stderr, "\n");
exit(1);
}
@ -90,9 +93,17 @@ int main(int argc, char **argv)
// verify parameters
if (argc != 3)
if (argc < 3)
usage("wrong number of arguments");
if (argc > 3)
magic = argv[3];
if (strlen(magic) != WNDR3700_MAGIC_LEN) {
fprintf(stderr, "Invalid magic: '%s'\n", magic);
exit(1);
}
// mmap input_file
if ((fd = open(argv[1], O_RDONLY)) < 0
|| (len = lseek(fd, 0, SEEK_END)) < 0
@ -110,7 +121,7 @@ int main(int argc, char **argv)
// preload header
memcpy(&header, input_file, sizeof(header));
header.magic = htonl(0x33373030); /* 3700 in ascii */
memcpy(header.magic, magic, WNDR3700_MAGIC_LEN);
header.crc = 0;
// create a firmware image in memory and copy the input_file to it