/*
* Convert endianess
*/
void do_endianconvert (void)
{
char *p = data;
union jffs2_node_union *node, newnode;
int fd, len;
jint32_t mode;
uint32_t crc;
fd = open (cnvfile, O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
fprintf (stderr, "Cannot open / create file: %s\n", cnvfile);
return;
}
while ( p < (data + imglen)) {
node = (union jffs2_node_union*) p;
/* Skip empty space */
if (je16_to_cpu (node->u.magic) == 0xFFFF && je16_to_cpu (node->u.nodetype) == 0xFFFF) {
write (fd, p, 4);
p += 4;
continue;
}
if (je16_to_cpu (node->u.magic) != JFFS2_MAGIC_BITMASK) {
printf ("Wrong bitmask at 0x%08x, 0x%04x\n", p - data, je16_to_cpu (node->u.magic));
newnode.u.magic = cnv_e16 (node->u.magic);
newnode.u.nodetype = cnv_e16 (node->u.nodetype);
write (fd, &newnode, 4);
p += 4;
continue;
}
crc = crc32 (0, node, sizeof (struct jffs2_unknown_node) - 4);
if (crc != je32_to_cpu (node->u.hdr_crc)) {
printf ("Wrong hdr_crc at 0x%08x, 0x%08x instead of 0x%08x\n", p - data, je32_to_cpu (node->u.hdr_crc), crc);
}
switch(je16_to_cpu(node->u.nodetype)) {
case JFFS2_NODETYPE_INODE:
newnode.i.magic = cnv_e16 (node->i.magic);
newnode.i.nodetype = cnv_e16 (node->i.nodetype);
newnode.i.totlen = cnv_e32 (node->i.totlen);
newnode.i.hdr_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
newnode.i.ino = cnv_e32 (node->i.ino);
newnode.i.version = cnv_e32 (node->i.version);
mode.v32 = node->i.mode.m;
mode = cnv_e32 (mode);
newnode.i.mode.m = mode.v32;
newnode.i.uid = cnv_e16 (node->i.uid);
newnode.i.gid = cnv_e16 (node->i.gid);
newnode.i.isize = cnv_e32 (node->i.isize);
newnode.i.atime = cnv_e32 (node->i.atime);
newnode.i.mtime = cnv_e32 (node->i.mtime);
newnode.i.ctime = cnv_e32 (node->i.ctime);
newnode.i.offset = cnv_e32 (node->i.offset);
newnode.i.csize = cnv_e32 (node->i.csize);
newnode.i.dsize = cnv_e32 (node->i.dsize);
newnode.i.compr = node->i.compr;
newnode.i.usercompr = node->i.usercompr;
newnode.i.flags = cnv_e16 (node->i.flags);
if (recalccrc) {
len = je32_to_cpu(node->i.csize);
newnode.i.data_crc = cpu_to_e32 ( crc32(0, p + sizeof (struct jffs2_raw_inode), len));
} else
newnode.i.data_crc = cnv_e32 (node->i.data_crc);
newnode.i.node_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_raw_inode) - 8));
write (fd, &newnode, sizeof (struct jffs2_raw_inode));
write (fd, p + sizeof (struct jffs2_raw_inode), PAD (je32_to_cpu (node->i.totlen) - sizeof (struct jffs2_raw_inode)));
p += PAD(je32_to_cpu (node->i.totlen));
break;
case JFFS2_NODETYPE_DIRENT:
newnode.d.magic = cnv_e16 (node->d.magic);
newnode.d.nodetype = cnv_e16 (node->d.nodetype);
newnode.d.totlen = cnv_e32 (node->d.totlen);
newnode.d.hdr_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
newnode.d.pino = cnv_e32 (node->d.pino);
newnode.d.version = cnv_e32 (node->d.version);
newnode.d.ino = cnv_e32 (node->d.ino);
newnode.d.mctime = cnv_e32 (node->d.mctime);
newnode.d.nsize = node->d.nsize;
newnode.d.type = node->d.type;
newnode.d.unused[0] = node->d.unused[0];
newnode.d.unused[1] = node->d.unused[1];
newnode.d.node_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_raw_dirent) - 8));
if (recalccrc)
newnode.d.name_crc = cpu_to_e32 ( crc32(0, p + sizeof (struct jffs2_raw_dirent), node->d.nsize));
else
newnode.d.name_crc = cnv_e32 (node->d.name_crc);
write (fd, &newnode, sizeof (struct jffs2_raw_dirent));
write (fd, p + sizeof (struct jffs2_raw_dirent), PAD (je32_to_cpu (node->d.totlen) - sizeof (struct jffs2_raw_dirent)));
p += PAD(je32_to_cpu (node->d.totlen));
break;
case JFFS2_NODETYPE_CLEANMARKER:
case JFFS2_NODETYPE_PADDING:
newnode.u.magic = cnv_e16 (node->u.magic);
newnode.u.nodetype = cnv_e16 (node->u.nodetype);
newnode.u.totlen = cnv_e32 (node->u.totlen);
newnode.u.hdr_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
write (fd, &newnode, sizeof (struct jffs2_unknown_node));
len = PAD(je32_to_cpu (node->u.totlen) - sizeof (struct jffs2_unknown_node));
if (len > 0)
write (fd, p + sizeof (struct jffs2_unknown_node), len);
p += PAD(je32_to_cpu (node->u.totlen));
break;
case JFFS2_NODETYPE_SUMMARY : {
struct jffs2_sum_marker *sm_ptr;
int i,sum_len;
int counter = 0;
newnode.s.magic = cnv_e16 (node->s.magic);
newnode.s.nodetype = cnv_e16 (node->s.nodetype);
newnode.s.totlen = cnv_e32 (node->s.totlen);
newnode.s.hdr_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
newnode.s.sum_num = cnv_e32 (node->s.sum_num);
newnode.s.cln_mkr = cnv_e32 (node->s.cln_mkr);
newnode.s.padded = cnv_e32 (node->s.padded);
newnode.s.node_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_raw_summary) - 8));
// summary header
p += sizeof (struct jffs2_raw_summary);
// summary data
sum_len = je32_to_cpu (node->s.totlen) - sizeof (struct jffs2_raw_summary) - sizeof (struct jffs2_sum_marker);
for (i=0; i<je32_to_cpu (node->s.sum_num); i++) {
union jffs2_sum_flash *fl_ptr;
fl_ptr = (union jffs2_sum_flash *) p;
switch (je16_to_cpu (fl_ptr->u.nodetype)) {
case JFFS2_NODETYPE_INODE:
fl_ptr->i.nodetype = cnv_e16 (fl_ptr->i.nodetype);
fl_ptr->i.inode = cnv_e32 (fl_ptr->i.inode);
fl_ptr->i.version = cnv_e32 (fl_ptr->i.version);
fl_ptr->i.offset = cnv_e32 (fl_ptr->i.offset);
fl_ptr->i.totlen = cnv_e32 (fl_ptr->i.totlen);
p += sizeof (struct jffs2_sum_inode_flash);
counter += sizeof (struct jffs2_sum_inode_flash);
break;
case JFFS2_NODETYPE_DIRENT:
fl_ptr->d.nodetype = cnv_e16 (fl_ptr->d.nodetype);
fl_ptr->d.totlen = cnv_e32 (fl_ptr->d.totlen);
fl_ptr->d.offset = cnv_e32 (fl_ptr->d.offset);
fl_ptr->d.pino = cnv_e32 (fl_ptr->d.pino);
fl_ptr->d.version = cnv_e32 (fl_ptr->d.version);
fl_ptr->d.ino = cnv_e32 (fl_ptr->d.ino);
p += sizeof (struct jffs2_sum_dirent_flash) + fl_ptr->d.nsize;
counter += sizeof (struct jffs2_sum_dirent_flash) + fl_ptr->d.nsize;
break;
default :
printf("Unknown node in summary information!!! nodetype(%x)\n", je16_to_cpu (fl_ptr->u.nodetype));
exit(EXIT_FAILURE);
break;
}
}
//pad
p += sum_len - counter;
// summary marker
sm_ptr = (struct jffs2_sum_marker *) p;
sm_ptr->offset = cnv_e32 (sm_ptr->offset);
sm_ptr->magic = cnv_e32 (sm_ptr->magic);
p += sizeof (struct jffs2_sum_marker);
// generate new crc on sum data
newnode.s.sum_crc = cpu_to_e32 ( crc32(0, ((char *) node) + sizeof (struct jffs2_raw_summary),
je32_to_cpu (node->s.totlen) - sizeof (struct jffs2_raw_summary)));
// write out new node header
write(fd, &newnode, sizeof (struct jffs2_raw_summary));
// write out new summary data
write(fd, &node->s.sum, sum_len + sizeof (struct jffs2_sum_marker));
break;
}
case 0xffff:
write (fd, p, 4);
p += 4;
break;
default:
printf ("Unknown node type: 0x%04x at 0x%08x, totlen 0x%08x\n", je16_to_cpu (node->u.nodetype), p - data, je32_to_cpu (node->u.totlen));
p += PAD(je32_to_cpu (node->u.totlen));
}
}
close (fd);
}
/*
* Convert endianess
*/
void do_endianconvert (void)
{
char *p = data;
union jffs2_node_union *node, newnode;
int fd, len;
jint32_t mode;
uint32_t crc;
fd = open (cnvfile, O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
fprintf (stderr, "Cannot open / create file: %s\n", cnvfile);
return;
}
while ( p < (data + imglen)) {
node = (union jffs2_node_union*) p;
/* Skip empty space */
if (de16_to_cpu (node->u.magic) == 0xFFFF && de16_to_cpu (node->u.nodetype) == 0xFFFF) {
write (fd, p, 4);
p += 4;
continue;
}
if (de16_to_cpu (node->u.magic) != JFFS2_MAGIC_BITMASK) {
printf ("Wrong bitmask at 0x%08x, 0x%04x\n", p - data, de16_to_cpu (node->u.magic));
newnode.u.magic = cnv_e16 (node->u.magic);
newnode.u.nodetype = cnv_e16 (node->u.nodetype);
write (fd, &newnode, 4);
p += 4;
continue;
}
crc = crc32 (0, node, sizeof (struct jffs2_unknown_node) - 4);
if (crc != de32_to_cpu (node->u.hdr_crc)) {
printf ("Wrong hdr_crc at 0x%08x, 0x%08x instead of 0x%08x\n", p - data, de32_to_cpu (node->u.hdr_crc), crc);
}
switch(de16_to_cpu(node->u.nodetype)) {
case JFFS2_NODETYPE_INODE:
newnode.i.magic = cnv_e16 (node->i.magic);
newnode.i.nodetype = cnv_e16 (node->i.nodetype);
newnode.i.totlen = cnv_e32 (node->i.totlen);
newnode.i.hdr_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
newnode.i.ino = cnv_e32 (node->i.ino);
newnode.i.version = cnv_e32 (node->i.version);
mode.v32 = node->i.mode.m;
mode = cnv_e32 (mode);
newnode.i.mode.m = mode.v32;
newnode.i.uid = cnv_e16 (node->i.uid);
newnode.i.gid = cnv_e16 (node->i.gid);
newnode.i.isize = cnv_e32 (node->i.isize);
newnode.i.atime = cnv_e32 (node->i.atime);
newnode.i.mtime = cnv_e32 (node->i.mtime);
newnode.i.ctime = cnv_e32 (node->i.ctime);
newnode.i.offset = cnv_e32 (node->i.offset);
newnode.i.csize = cnv_e32 (node->i.csize);
newnode.i.dsize = cnv_e32 (node->i.dsize);
newnode.i.compr = node->i.compr;
newnode.i.usercompr = node->i.usercompr;
newnode.i.flags = cnv_e16 (node->i.flags);
if (recalccrc) {
len = de32_to_cpu(node->i.csize);
newnode.i.data_crc = cpu_to_e32 ( crc32(0, p + sizeof (struct jffs2_raw_inode), len));
} else
newnode.i.data_crc = cnv_e32 (node->i.data_crc);
newnode.i.node_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_raw_inode) - 8));
write (fd, &newnode, sizeof (struct jffs2_raw_inode));
write (fd, p + sizeof (struct jffs2_raw_inode), PAD (de32_to_cpu (node->i.totlen) - sizeof (struct jffs2_raw_inode)));
p += PAD(de32_to_cpu (node->i.totlen));
break;
case JFFS2_NODETYPE_DIRENT:
newnode.d.magic = cnv_e16 (node->d.magic);
newnode.d.nodetype = cnv_e16 (node->d.nodetype);
newnode.d.totlen = cnv_e32 (node->d.totlen);
newnode.d.hdr_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
newnode.d.pino = cnv_e32 (node->d.pino);
newnode.d.version = cnv_e32 (node->d.version);
newnode.d.ino = cnv_e32 (node->d.ino);
newnode.d.mctime = cnv_e32 (node->d.mctime);
newnode.d.nsize = node->d.nsize;
newnode.d.type = node->d.type;
newnode.d.unused[0] = node->d.unused[0];
newnode.d.unused[1] = node->d.unused[1];
newnode.d.node_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_raw_dirent) - 8));
if (recalccrc)
newnode.d.name_crc = cpu_to_e32 ( crc32(0, p + sizeof (struct jffs2_raw_dirent), node->d.nsize));
else
newnode.d.name_crc = cnv_e32 (node->d.name_crc);
write (fd, &newnode, sizeof (struct jffs2_raw_dirent));
write (fd, p + sizeof (struct jffs2_raw_dirent), PAD (de32_to_cpu (node->d.totlen) - sizeof (struct jffs2_raw_dirent)));
p += PAD(de32_to_cpu (node->d.totlen));
break;
case JFFS2_NODETYPE_CLEANMARKER:
case JFFS2_NODETYPE_PADDING:
newnode.u.magic = cnv_e16 (node->u.magic);
newnode.u.nodetype = cnv_e16 (node->u.nodetype);
newnode.u.totlen = cnv_e32 (node->u.totlen);
newnode.u.hdr_crc = cpu_to_e32 (crc32 (0, &newnode, sizeof (struct jffs2_unknown_node) - 4));
write (fd, &newnode, sizeof (struct jffs2_unknown_node));
len = PAD(de32_to_cpu (node->u.totlen) - sizeof (struct jffs2_unknown_node));
if (len > 0)
write (fd, p + sizeof (struct jffs2_unknown_node), len);
p += PAD(de32_to_cpu (node->u.totlen));
break;
case 0xffff:
write (fd, p, 4);
p += 4;
break;
default:
printf ("Unknown node type: 0x%04x at 0x%08x, totlen 0x%08x\n", de16_to_cpu (node->u.nodetype), p - data, de32_to_cpu (node->u.totlen));
p += PAD(de32_to_cpu (node->u.totlen));
}
}
close (fd);
}