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-rw-r--r--package/openwrt/mtd.c65
1 files changed, 37 insertions, 28 deletions
diff --git a/package/openwrt/mtd.c b/package/openwrt/mtd.c
index f0c127b72..a73e0afd1 100644
--- a/package/openwrt/mtd.c
+++ b/package/openwrt/mtd.c
@@ -42,25 +42,18 @@
#include <linux/mtd/mtd.h>
-/* trx header */
#define TRX_MAGIC 0x30524448 /* "HDR0" */
-#define TRX_VERSION 1
-#define TRX_MAX_LEN 0x3A0000
-#define TRX_NO_HEADER 1 /* Do not write TRX header */
-
+#define BUFSIZE (10 * 1024)
#define MAX_ARGS 8
struct trx_header {
- uint32_t magic; /* "HDR0" */
- uint32_t len; /* Length of file including header */
- uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
- uint32_t flag_version; /* 0:15 flags, 16:31 version */
+ uint32_t magic; /* "HDR0" */
+ uint32_t len; /* Length of file including header */
+ uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
+ uint32_t flag_version; /* 0:15 flags, 16:31 version */
uint32_t offsets[3]; /* Offsets of partitions from start of header */
};
-#define BUFSIZE (10 * 1024)
-
-
int
mtd_unlock(const char *mtd)
{
@@ -84,7 +77,6 @@ mtd_unlock(const char *mtd)
mtdLockInfo.start = 0;
mtdLockInfo.length = mtdInfo.size;
if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
- fprintf(stderr, "Could not unlock MTD device: %s\n", mtd);
close(fd);
return 0;
}
@@ -156,38 +148,55 @@ mtd_erase(const char *mtd)
int
mtd_write(const char *trxfile, const char *mtd)
{
- int fd;
- int trxfd;
- int i;
- size_t result,size,written;
+ int fd,trxfd,i;
+ struct trx_header trx;
+ size_t count,result,size,written;
struct mtd_info_user mtdInfo;
struct erase_info_user mtdEraseInfo;
struct stat trxstat;
unsigned char src[BUFSIZE],dest[BUFSIZE];
- fd = mtd_open(mtd, O_RDWR);
- if(fd < 0) {
- fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+ trxfd = open(trxfile,O_RDONLY);
+ if(trxfd < 0) {
+ fprintf(stderr, "Could not open trx image: %s\n", trxfile);
exit(1);
}
- if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
- fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
- close(fd);
+ if (fstat(trxfd,&trxstat) < 0) {
+ fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
+ close(trxfd);
exit(1);
}
- trxfd = open(trxfile,O_RDONLY);
- if(trxfd < 0) {
- fprintf(stderr, "Could not open trx image: %s\n", trxfile);
+ 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 (fstat (trxfd,&trxstat) < 0) {
- fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
+ 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);
+ 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);