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check if firmware is trx and is not too big, before unlocking/erasing/writing anything

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1486 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
wbx 2005-07-17 16:03:51 +00:00
parent 9b4823e8b3
commit fc415ef4be
1 changed files with 76 additions and 40 deletions
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116
openwrt/package/openwrt/mtd.c
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@ -54,6 +54,73 @@ struct trx_header {
uint32_t offsets[3]; /* Offsets of partitions from start of header */
};
int
trx_check(const char *trxfile, const char *mtd)
{
struct mtd_info_user mtdInfo;
int trxfd, fd;
size_t count;
struct trx_header trx;
struct stat trxstat;
trxfd = open(trxfile,O_RDONLY);
if(trxfd < 0) {
fprintf(stderr, "Could not open trx image: %s\n", trxfile);
exit(1);
}
if (fstat(trxfd,&trxstat) < 0) {
fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
close(trxfd);
exit(1);
}
count = read(trxfd, &trx, sizeof(struct trx_header));
if (count < sizeof(struct trx_header)) {
fprintf(stderr, "Could not trx header, file too small (%ld bytes)\n", count);
close(trxfd);
exit(1);
}
if (trx.magic != TRX_MAGIC || trx.len < sizeof(struct trx_header)) {
fprintf(stderr, "Bad trx header\n");
fprintf(stderr, "If this is a firmware in bin format, like some of the\n"
"original firmware files are, use following command to convert to trx:\n"
"dd if=firmware.bin of=firmware.trx bs=32 skip=1\n");
close(trxfd);
exit(1);
}
lseek(trxfd, 0, SEEK_SET);
/* check if image fits to mtd device */
fd = mtd_open(mtd, O_RDWR);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
close(fd);
exit(1);
}
if(mtdInfo.size < trxstat.st_size) {
fprintf(stderr, "Image too big for partition: %s\n", mtd);
close(trxfd);
close(fd);
exit(1);
}
printf("Writing %s to %s ...\n", trxfile, mtd);
close(fd);
return(trxfd);
}
int
mtd_unlock(const char *mtd)
{
@ -146,46 +213,21 @@ mtd_erase(const char *mtd)
}
int
mtd_write(const char *trxfile, const char *mtd)
mtd_write(int trxfd, const char *mtd)
{
int fd,trxfd,i;
struct trx_header trx;
size_t count,result,size,written;
int fd,i;
size_t result,size,written;
struct mtd_info_user mtdInfo;
struct erase_info_user mtdEraseInfo;
struct stat trxstat;
unsigned char src[BUFSIZE],dest[BUFSIZE];
trxfd = open(trxfile,O_RDONLY);
if(trxfd < 0) {
fprintf(stderr, "Could not open trx image: %s\n", trxfile);
exit(1);
}
struct stat trxstat;
if (fstat(trxfd,&trxstat) < 0) {
fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
fprintf(stderr, "Could not get trx image file status\n");
close(trxfd);
exit(1);
}
count = read(trxfd, &trx, sizeof(struct trx_header));
if (count < sizeof(struct trx_header)) {
fprintf(stderr, "Could not trx header, file too small (%ld bytes)\n", count);
close(trxfd);
exit(1);
}
if (trx.magic != TRX_MAGIC || trx.len < sizeof(struct trx_header)) {
fprintf(stderr, "Bad trx header\n");
fprintf(stderr, "If this is a firmware in bin format, like some of the\n"
"original firmware files are, use following command to convert to trx:\n"
"dd if=firmware.bin of=firmware.trx bs=32 skip=1\n");
close(trxfd);
exit(1);
}
lseek(trxfd, 0, SEEK_SET);
fd = mtd_open(mtd, O_RDWR);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
@ -198,14 +240,6 @@ mtd_write(const char *trxfile, const char *mtd)
exit(1);
}
if(mtdInfo.size < trxstat.st_size) {
fprintf(stderr, "Image too big for partition: %s\n", mtd);
close(trxfd);
exit(1);
}
printf("Writing %s to %s ...\n", trxfile, mtd);
mtdEraseInfo.start = 0;
mtdEraseInfo.length = trxstat.st_size & ~(mtdInfo.erasesize -1);
if(trxstat.st_size % mtdInfo.erasesize) mtdEraseInfo.length += mtdInfo.erasesize;
@ -257,7 +291,7 @@ void usage(void)
int main (int argc, char **argv)
{
int ch, i, boot, unlock;
int ch, i, boot, unlock, trxfd;
char *erase[MAX_ARGS], *device;
enum {
CMD_ERASE,
@ -301,6 +335,8 @@ int main (int argc, char **argv)
} else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
cmd = CMD_WRITE;
device = argv[2];
/* check trx file before erasing or writing anything */
trxfd = trx_check(argv[1], device);
} else {
usage();
}
@ -323,7 +359,7 @@ int main (int argc, char **argv)
mtd_erase(device);
break;
case CMD_WRITE:
mtd_write(argv[1], device);
mtd_write(trxfd, device);
break;
}