static void act_offset (void) {
char buffer[80];
char prompt[80];
fileoffset_t o;
fileoffset_t new_top;
int error;
sprintf (prompt, "Enter start-of-file offset in bytes (now %"OFF"d): ",
realoffset);
if (!get_str (prompt, buffer, FALSE))
return;
o = parse_num (buffer, &error);
if (error) {
display_beep();
strcpy (message, "Unable to parse offset value");
return;
}
if (o >= 0) {
realoffset = o;
fix_offset();
new_top = cur_pos - (scrlines-1) * width;
new_top = begline(new_top);
if (top_pos < new_top)
top_pos = new_top;
}
}
static void act_width (void) {
char buffer[80];
char prompt[80];
fileoffset_t w;
fileoffset_t new_top;
int error;
sprintf (prompt, "Enter screen width in bytes (now %"OFF"d): ", width);
if (!get_str (prompt, buffer, FALSE))
return;
w = parse_num (buffer, &error);
if (error) {
display_beep();
strcpy (message, "Unable to parse width value");
return;
}
if (w > 0) {
width = w;
fix_offset();
new_top = cur_pos - (scrlines-1) * width;
new_top = begline(new_top);
if (top_pos < new_top)
top_pos = new_top;
}
}
/* Calculate the offsets to the filter points, for all border regions and
the interior of the array: */
int init_filter_offsets(PyArrayObject *array, bool *footprint,
const npy_intp * const fshape, npy_intp* origins,
const ExtendMode mode, npy_intp **offsets, npy_intp *border_flag_value,
npy_intp **coordinate_offsets)
{
npy_intp coordinates[NPY_MAXDIMS], position[NPY_MAXDIMS];
npy_intp forigins[NPY_MAXDIMS];
const int rank = array->nd;
const npy_intp* const ashape = array->dimensions;
const npy_intp* const astrides = array->strides;
const npy_intp sizeof_element = PyArray_ITEMSIZE(array);
/* calculate how many sets of offsets must be stored: */
npy_intp offsets_size = 1;
for(int ii = 0; ii < rank; ii++)
offsets_size *= (ashape[ii] < fshape[ii] ? ashape[ii] : fshape[ii]);
/* the size of the footprint array: */
npy_intp filter_size = 1;
for(int i = 0; i < rank; ++i) filter_size *= fshape[i];
/* calculate the number of non-zero elements in the footprint: */
npy_intp footprint_size = 0;
if (footprint) {
for(int i = 0; i < filter_size; ++i) footprint_size += footprint[i];
} else {
footprint_size = filter_size;
}
if (int(mode) < 0 || int(mode) > EXTEND_LAST) {
PyErr_SetString(PyExc_RuntimeError, "boundary mode not supported");
return 0;
}
try {
*offsets = 0;
if (coordinate_offsets) *coordinate_offsets = 0;
*offsets = new npy_intp[offsets_size * footprint_size];
if (coordinate_offsets) {
*coordinate_offsets = new npy_intp[offsets_size * rank * footprint_size];
}
} catch (std::bad_alloc&) {
if (*offsets) delete [] offsets;
PyErr_NoMemory();
return -1;
}
// from here on, we cannot fail anymore:
for(int ii = 0; ii < rank; ii++) {
forigins[ii] = fshape[ii]/2 + (origins ? *origins++ : 0);
}
npy_intp max_size = 0; // maximum ashape[i]
npy_intp max_stride = 0; // maximum abs( astrides[i] )
for(int ii = 0; ii < rank; ii++) {
const npy_intp stride = astrides[ii] < 0 ? -astrides[ii] : astrides[ii];
if (stride > max_stride)
max_stride = stride;
if (ashape[ii] > max_size)
max_size = ashape[ii];
/* coordinates for iterating over the kernel elements: */
coordinates[ii] = 0;
/* keep track of the kernel position: */
position[ii] = 0;
}
/* the flag to indicate that we are outside the border must have a
value that is larger than any possible offset: */
*border_flag_value = max_size * max_stride + 1;
/* calculate all possible offsets to elements in the filter kernel,
for all regions in the array (interior and border regions): */
npy_intp* po = *offsets;
npy_intp* pc = coordinate_offsets ? *coordinate_offsets : 0;
/* iterate over all regions: */
for(int ll = 0; ll < offsets_size; ll++) {
/* iterate over the elements in the footprint array: */
for(int kk = 0; kk < filter_size; kk++) {
npy_intp offset = 0;
/* only calculate an offset if the footprint is 1: */
if (!footprint || footprint[kk]) {
/* find offsets along all axes: */
for(int ii = 0; ii < rank; ii++) {
const npy_intp orgn = forigins[ii];
npy_intp cc = coordinates[ii] - orgn + position[ii];
cc = fix_offset(mode, cc, ashape[ii], *border_flag_value);
/* calculate offset along current axis: */
if (cc == *border_flag_value) {
/* just flag that we are outside the border */
offset = *border_flag_value;
if (coordinate_offsets)
pc[ii] = 0;
break;
} else {
/* use an offset that is possibly mapped from outside the border: */
cc -= position[ii];
offset += astrides[ii] * cc;
if (coordinate_offsets)
pc[ii] = cc;
}
}
if (offset != *border_flag_value) offset /= sizeof_element;
/* store the offset */
*po++ = offset;
if (coordinate_offsets)
pc += rank;
}
/* next point in the filter: */
for(int ii = rank - 1; ii >= 0; ii--) {
if (coordinates[ii] < fshape[ii] - 1) {
coordinates[ii]++;
break;
} else {
coordinates[ii] = 0;
}
}
}
/* move to the next array region: */
for(int ii = rank - 1; ii >= 0; ii--) {
const int orgn = forigins[ii];
if (position[ii] == orgn) {
position[ii] += ashape[ii] - fshape[ii] + 1;
if (position[ii] <= orgn)
position[ii] = orgn + 1;
} else {
position[ii]++;
}
if (position[ii] < ashape[ii]) {
break;
} else {
position[ii] = 0;
}
}
}
return footprint_size;
}
/* Calculate the offsets to the filter points, for all border regions and
the interior of the array: */
int init_filter_offsets(PyArrayObject *array, bool *footprint,
const npy_intp * const fshape, npy_intp* origins,
const ExtendMode mode, std::vector<npy_intp>& offsets,
std::vector<npy_intp>* coordinate_offsets)
{
npy_intp coordinates[NPY_MAXDIMS], position[NPY_MAXDIMS];
npy_intp forigins[NPY_MAXDIMS];
const int rank = array->nd;
const npy_intp* const ashape = array->dimensions;
npy_intp astrides[NPY_MAXDIMS];
for (int d = 0; d != rank; ++d) astrides[d] = array->strides[d]/PyArray_ITEMSIZE(array);
/* calculate how many sets of offsets must be stored: */
npy_intp offsets_size = 1;
for(int ii = 0; ii < rank; ii++)
offsets_size *= (ashape[ii] < fshape[ii] ? ashape[ii] : fshape[ii]);
/* the size of the footprint array: */
npy_intp filter_size = 1;
for(int i = 0; i < rank; ++i) filter_size *= fshape[i];
/* calculate the number of non-zero elements in the footprint: */
npy_intp footprint_size = 0;
if (footprint) {
for(int i = 0; i < filter_size; ++i) footprint_size += footprint[i];
} else {
footprint_size = filter_size;
}
if (int(mode) < 0 || int(mode) > EXTEND_LAST) {
throw PythonException(PyExc_RuntimeError, "boundary mode not supported");
}
offsets.resize(offsets_size * footprint_size);
if (coordinate_offsets) coordinate_offsets->resize(offsets_size * footprint_size);
// from here on, we cannot fail anymore:
for(int ii = 0; ii < rank; ii++) {
forigins[ii] = fshape[ii]/2 + (origins ? *origins++ : 0);
}
std::fill(coordinates, coordinates + rank, 0);
std::fill(position, position + rank, 0);
/* calculate all possible offsets to elements in the filter kernel,
for all regions in the array (interior and border regions): */
unsigned poi = 0;
npy_intp* pc = coordinate_offsets ? &(*coordinate_offsets)[0] : 0;
/* iterate over all regions: */
for(int ll = 0; ll < offsets_size; ll++) {
/* iterate over the elements in the footprint array: */
for(int kk = 0; kk < filter_size; kk++) {
npy_intp offset = 0;
/* only calculate an offset if the footprint is 1: */
if (!footprint || footprint[kk]) {
/* find offsets along all axes: */
for(int ii = 0; ii < rank; ii++) {
const npy_intp orgn = forigins[ii];
npy_intp cc = coordinates[ii] - orgn + position[ii];
cc = fix_offset(mode, cc, ashape[ii]);
/* calculate offset along current axis: */
if (cc == border_flag_value) {
/* just flag that we are outside the border */
offset = border_flag_value;
if (coordinate_offsets)
pc[ii] = 0;
break;
} else {
/* use an offset that is possibly mapped from outside the border: */
cc -= position[ii];
offset += astrides[ii] * cc;
if (coordinate_offsets)
pc[ii] = cc;
}
}
/* store the offset */
offsets[poi++] = offset;
if (coordinate_offsets)
pc += rank;
}
/* next point in the filter: */
for(int ii = rank - 1; ii >= 0; ii--) {
if (coordinates[ii] < fshape[ii] - 1) {
coordinates[ii]++;
break;
} else {
coordinates[ii] = 0;
}
}
}
/* move to the next array region: */
for(int ii = rank - 1; ii >= 0; ii--) {
const int orgn = forigins[ii];
if (position[ii] == orgn) {
position[ii] += ashape[ii] - fshape[ii] + 1;
if (position[ii] <= orgn)
position[ii] = orgn + 1;
} else {
position[ii]++;
}
if (position[ii] < ashape[ii]) {
break;
} else {
position[ii] = 0;
}
}
}
assert(poi <= offsets.size());
return footprint_size;
}
static int
fix_program(pcap_t *handle, struct sock_fprog *fcode, int is_mmapped)
{
size_t prog_size;
register int i;
register struct bpf_insn *p;
struct bpf_insn *f;
int len;
/*
* Make a copy of the filter, and modify that copy if
* necessary.
*/
prog_size = sizeof(*handle->fcode.bf_insns) * handle->fcode.bf_len;
len = handle->fcode.bf_len;
f = (struct bpf_insn *)malloc(prog_size);
if (f == NULL) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
"malloc: %s", pcap_strerror(errno));
return -1;
}
memcpy(f, handle->fcode.bf_insns, prog_size);
fcode->len = len;
fcode->filter = (struct sock_filter *) f;
for (i = 0; i < len; ++i) {
p = &f[i];
/*
* What type of instruction is this?
*/
switch (BPF_CLASS(p->code)) {
case BPF_RET:
/*
* It's a return instruction; are we capturing
* in memory-mapped mode?
*/
if (!is_mmapped) {
/*
* No; is the snapshot length a constant,
* rather than the contents of the
* accumulator?
*/
if (BPF_MODE(p->code) == BPF_K) {
/*
* Yes - if the value to be returned,
* i.e. the snapshot length, is
* anything other than 0, make it
* 65535, so that the packet is
* truncated by "recvfrom()",
* not by the filter.
*
* XXX - there's nothing we can
* easily do if it's getting the
* value from the accumulator; we'd
* have to insert code to force
* non-zero values to be 65535.
*/
if (p->k != 0)
p->k = 65535;
}
}
break;
case BPF_LD:
case BPF_LDX:
/*
* It's a load instruction; is it loading
* from the packet?
*/
switch (BPF_MODE(p->code)) {
case BPF_ABS:
case BPF_IND:
case BPF_MSH:
/*
* Yes; are we in cooked mode?
*/
if (handle->md.cooked) {
/*
* Yes, so we need to fix this
* instruction.
*/
if (fix_offset(p) < 0) {
/*
* We failed to do so.
* Return 0, so our caller
* knows to punt to userland.
*/
return 0;
}
}
break;
}
break;
}
}
return 1; /* we succeeded */
}
void analyze_CPK(FILE *infile, long file_length, struct cpk_file *file, int new_file_count)
{
const long CpkHeader_offset = 0x0;
char *toc_string_table = NULL;
/* check header */
{
unsigned char buf[4];
static const char CPK_signature[4] = "CPK "; /* intentionally unterminated */
get_bytes_seek(CpkHeader_offset, infile, buf, 4);
CHECK_ERROR (memcmp(buf, CPK_signature, sizeof(CPK_signature)), "CPK signature not found");
}
/* check CpkHeader */
{
struct utf_query_result result = query_utf_nofail(infile, CpkHeader_offset+0x10, NULL);
CHECK_ERROR (result.rows != 1, "wrong number of rows in CpkHeader");
}
/* get TOC offset */
long toc_offset = query_utf_8byte(infile, CpkHeader_offset+0x10, 0, "TocOffset");
/* get content offset */
long content_offset = query_utf_8byte(infile, CpkHeader_offset+0x10, 0, "ContentOffset");
/* get file count from CpkHeader */
long CpkHeader_count = query_utf_4byte(infile, CpkHeader_offset+0x10, 0, "Files");
#ifdef DEBUG
printf("(Debug)TocOffset: %d\n(Debug)ContentOffset: %d\n(Debug)Files(Count): %d\n",toc_offset,content_offset,CpkHeader_count);
#endif
/* check TOC header */
{
unsigned char buf[4];
static const char TOC_signature[4] = "TOC "; /* intentionally unterminated */
get_bytes_seek(toc_offset, infile, buf, 4);
CHECK_ERROR (memcmp(buf, TOC_signature, sizeof(TOC_signature)), "TOC signature not found");
}
/* get TOC entry count, string table offset */
long toc_entries;
long toc_string_table_offset;
long toc_string_table_size;
{
struct utf_query_result result = query_utf_nofail(infile, toc_offset+0x10, NULL);
toc_entries = result.rows;
toc_string_table_offset = toc_offset + 0x10 + 8 + result.string_table_offset;
toc_string_table_size = result.data_offset - result.string_table_offset;
}
#ifdef DEBUG
printf("(Debug)TocEntries: %d\n(Debug)TocStringTableOffset: %d\n(Debug)TocStringTableSize:%d\n",toc_entries,toc_string_table_offset,toc_string_table_size);
#endif
/* check that counts match */
CHECK_ERROR( toc_entries != CpkHeader_count, "CpkHeader file count and TOC entry count do not match" );
/* load string table */
toc_string_table = malloc(toc_string_table_size + 1);
{
CHECK_ERRNO(!toc_string_table, "malloc");
memset(toc_string_table, 0, toc_string_table_size+1);
get_bytes_seek(toc_string_table_offset, infile,
(unsigned char *)toc_string_table, toc_string_table_size);
}
/* find files in cpk */
for (int i = 0; i < toc_entries; i++)
{
/* get file name */
const char *file_name = query_utf_string(infile, toc_offset+0x10, i, "FileName", toc_string_table);
const char *dir_name=query_utf_string(infile,toc_offset+0x10,i,"DirName",toc_string_table);
/* to query a file with relative path, remember to free it */
char* query_file=malloc(strlen(dir_name)+strlen(file_name)+2);
strcpy(query_file,dir_name);
char sep[]="/";
strcat(query_file,sep);
strcat(query_file,file_name);
int entry_num = contains_file_name(query_file, file, new_file_count);
if (entry_num >= 0)
{
#ifdef DEBUG
printf("(Debug)FileName length:%d\n(Debug)DirName length:%d\n",strlen(file_name),strlen(dir_name));
printf("(Debug)query file location:%s\n",query_file);
#endif
printf("Found %s/%s in cpk\n",dir_name, file_name);
/* get file offset */
file[entry_num].orig_offset = content_offset + query_utf_8byte(infile, toc_offset+0x10, i, "FileOffset");
/* get file size */
file[entry_num].orig_size = query_utf_4byte(infile, toc_offset+0x10, i, "FileSize");
/* save index */
file[entry_num].index = i;
file[entry_num].found = 1;
#ifdef DEBUG
printf("(Debug)EntryNum:%d\n",entry_num);
#endif
}
/* free the query_file to avoid leak */
if(query_file)
free(query_file);
}
sort_by_offset(file, new_file_count);
FILE *outfile = fopen("out.cpk", "w+b");
printf("Starting file copy\n");
long current = 0;
for (int i = 0; i < new_file_count; i++)
{
if (file[i].found)
{
/* copy from infile to start of current new file */
dump(infile, outfile, current, file[i].orig_offset-current);
current = file[i].orig_offset;
/* open new file and copy data */
FILE *newfile = fopen(file[i].location, "rb");
CHECK_ERRNO(!newfile, "fopen");
CHECK_ERRNO(fseek(newfile, 0 , SEEK_END) != 0, "fseek");
file[i].new_size = ftell(newfile);
CHECK_ERRNO(file_length == -1, "ftell");
rewind(infile);
printf("Copying %s(file name:%s)\n", file[i].location,file[i].filename);
dump(newfile, outfile, 0, file[i].new_size);
printf("Finished copying %s(file name:%s)\n", file[i].location,file[i].filename);
fclose(newfile);
/* update information */
current += file[i].orig_size;
file[i].copied = 1;
file[i].offset_diff = file[i].new_size -file[i].orig_size;
}
}
/* copy remaining data */
dump(infile, outfile, current, file_length-current);
printf("Finished file copy\n");
/* fix toc_offset */
toc_offset = fix_offset(outfile, CpkHeader_offset+0x10, 0, 0, "TocOffset", file, new_file_count);
printf("Fixed toc offset\n");
/* fix file offsets */
for (int i = 0; i < toc_entries; i++)
fix_offset(outfile, toc_offset+0x10, content_offset, i, "FileOffset", file, new_file_count);
printf("Fixed file offsets\n");
/* fix file sizes */
for (int i = 0; i < new_file_count; i++)
fix_file_sizes(outfile, toc_offset+0x10, file, i);
printf("Finished replacing files and fixing data\n");
CHECK_ERRNO(fclose(outfile) != 0, "fclose");
if (toc_string_table)
{
free(toc_string_table);
toc_string_table = NULL;
}
}