2 Unix SMB/CIFS implementation.
3 Samba memory buffer functions
4 Copyright (C) Andrew Tridgell 1992-1997
5 Copyright (C) Luke Kenneth Casson Leighton 1996-1997
6 Copyright (C) Jeremy Allison 1999.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #define DBGC_CLASS DBGC_RPC_PARSE
29 * Dump a prs to a file: from the current location through to the end.
31 void prs_dump(char *name
, int v
, prs_struct
*ps
)
33 prs_dump_region(name
, v
, ps
, ps
->data_offset
, ps
->buffer_size
);
38 * Dump from the start of the prs to the current location.
40 void prs_dump_before(char *name
, int v
, prs_struct
*ps
)
42 prs_dump_region(name
, v
, ps
, 0, ps
->data_offset
);
47 * Dump everything from the start of the prs up to the current location.
49 void prs_dump_region(char *name
, int v
, prs_struct
*ps
,
50 int from_off
, int to_off
)
54 if (DEBUGLEVEL
< 50) return;
57 slprintf(fname
,sizeof(fname
)-1, "/tmp/%s_%d.%d.prs", name
, v
, i
);
59 slprintf(fname
,sizeof(fname
)-1, "/tmp/%s.%d.prs", name
, i
);
61 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
62 if (fd
!= -1 || errno
!= EEXIST
) break;
65 write(fd
, ps
->data_p
+ from_off
, to_off
- from_off
);
67 DEBUG(0,("created %s\n", fname
));
73 /*******************************************************************
74 debug output for parsing info.
76 XXXX side-effect of this function is to increase the debug depth XXXX
78 ********************************************************************/
79 void prs_debug(prs_struct
*ps
, int depth
, const char *desc
, char *fn_name
)
81 DEBUG(5+depth
, ("%s%06x %s %s\n", tab_depth(depth
), ps
->data_offset
, fn_name
, desc
));
86 * Initialise an expandable parse structure.
88 * @param size Initial buffer size. If >0, a new buffer will be
89 * created with malloc().
91 * @return False if allocation fails, otherwise True.
93 BOOL
prs_init(prs_struct
*ps
, uint32 size
, TALLOC_CTX
*ctx
, BOOL io
)
97 ps
->bigendian_data
= RPC_LITTLE_ENDIAN
;
98 ps
->align
= RPC_PARSE_ALIGN
;
99 ps
->is_dynamic
= False
;
106 ps
->buffer_size
= size
;
107 if((ps
->data_p
= (char *)malloc((size_t)size
)) == NULL
) {
108 DEBUG(0,("prs_init: malloc fail for %u bytes.\n", (unsigned int)size
));
111 memset(ps
->data_p
, '\0', (size_t)size
);
112 ps
->is_dynamic
= True
; /* We own this memory. */
118 /*******************************************************************
119 read from a socket into memory.
120 ********************************************************************/
121 BOOL
prs_read(prs_struct
*ps
, int fd
, size_t len
, int timeout
)
124 size_t prev_size
= ps
->buffer_size
;
125 if (!prs_grow(ps
, len
))
129 ok
= (read_with_timeout(fd
, &ps
->data_p
[prev_size
],
130 len
, len
,timeout
) == len
);
132 ok
= (read_data(fd
, &ps
->data_p
[prev_size
], len
) == len
);
137 /*******************************************************************
138 Delete the memory in a parse structure - if we own it.
139 ********************************************************************/
141 void prs_mem_free(prs_struct
*ps
)
144 SAFE_FREE(ps
->data_p
);
145 ps
->is_dynamic
= False
;
150 /*******************************************************************
151 Clear the memory in a parse structure.
152 ********************************************************************/
154 void prs_mem_clear(prs_struct
*ps
)
156 memset(ps
->data_p
, '\0', (size_t)ps
->buffer_size
);
159 /*******************************************************************
160 Allocate memory when unmarshalling... Always zero clears.
161 ********************************************************************/
163 char *prs_alloc_mem(prs_struct
*ps
, size_t size
)
165 char *ret
= talloc(ps
->mem_ctx
, size
);
168 memset(ret
, '\0', size
);
173 /*******************************************************************
174 Return the current talloc context we're using.
175 ********************************************************************/
177 TALLOC_CTX
*prs_get_mem_context(prs_struct
*ps
)
182 /*******************************************************************
183 Hand some already allocated memory to a prs_struct.
184 ********************************************************************/
186 void prs_give_memory(prs_struct
*ps
, char *buf
, uint32 size
, BOOL is_dynamic
)
188 ps
->is_dynamic
= is_dynamic
;
190 ps
->buffer_size
= size
;
193 /*******************************************************************
194 Take some memory back from a prs_struct.
195 ********************************************************************/
197 char *prs_take_memory(prs_struct
*ps
, uint32
*psize
)
199 char *ret
= ps
->data_p
;
201 *psize
= ps
->buffer_size
;
202 ps
->is_dynamic
= False
;
207 /*******************************************************************
208 Set a prs_struct to exactly a given size. Will grow or tuncate if neccessary.
209 ********************************************************************/
211 BOOL
prs_set_buffer_size(prs_struct
*ps
, uint32 newsize
)
213 if (newsize
> ps
->buffer_size
)
214 return prs_force_grow(ps
, newsize
- ps
->buffer_size
);
216 if (newsize
< ps
->buffer_size
) {
217 char *new_data_p
= Realloc(ps
->data_p
, newsize
);
218 /* if newsize is zero, Realloc acts like free() & returns NULL*/
219 if (new_data_p
== NULL
&& newsize
!= 0) {
220 DEBUG(0,("prs_set_buffer_size: Realloc failure for size %u.\n",
221 (unsigned int)newsize
));
222 DEBUG(0,("prs_set_buffer_size: Reason %s\n",strerror(errno
)));
225 ps
->data_p
= new_data_p
;
226 ps
->buffer_size
= newsize
;
232 /*******************************************************************
233 Attempt, if needed, to grow a data buffer.
234 Also depends on the data stream mode (io).
235 ********************************************************************/
237 BOOL
prs_grow(prs_struct
*ps
, uint32 extra_space
)
242 ps
->grow_size
= MAX(ps
->grow_size
, ps
->data_offset
+ extra_space
);
244 if(ps
->data_offset
+ extra_space
<= ps
->buffer_size
)
248 * We cannot grow the buffer if we're not reading
249 * into the prs_struct, or if we don't own the memory.
252 if(UNMARSHALLING(ps
) || !ps
->is_dynamic
) {
253 DEBUG(0,("prs_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
254 (unsigned int)extra_space
));
259 * Decide how much extra space we really need.
262 extra_space
-= (ps
->buffer_size
- ps
->data_offset
);
263 if(ps
->buffer_size
== 0) {
265 * Ensure we have at least a PDU's length, or extra_space, whichever
269 new_size
= MAX(MAX_PDU_FRAG_LEN
,extra_space
);
271 if((new_data
= malloc(new_size
)) == NULL
) {
272 DEBUG(0,("prs_grow: Malloc failure for size %u.\n", (unsigned int)new_size
));
275 memset(new_data
, '\0', (size_t)new_size
);
278 * If the current buffer size is bigger than the space needed, just
279 * double it, else add extra_space.
281 new_size
= MAX(ps
->buffer_size
*2, ps
->buffer_size
+ extra_space
);
283 if ((new_data
= Realloc(ps
->data_p
, new_size
)) == NULL
) {
284 DEBUG(0,("prs_grow: Realloc failure for size %u.\n",
285 (unsigned int)new_size
));
289 memset(&new_data
[ps
->buffer_size
], '\0', (size_t)(new_size
- ps
->buffer_size
));
291 ps
->buffer_size
= new_size
;
292 ps
->data_p
= new_data
;
297 /*******************************************************************
298 Attempt to force a data buffer to grow by len bytes.
299 This is only used when appending more data onto a prs_struct
300 when reading an rpc reply, before unmarshalling it.
301 ********************************************************************/
303 BOOL
prs_force_grow(prs_struct
*ps
, uint32 extra_space
)
305 uint32 new_size
= ps
->buffer_size
+ extra_space
;
308 if(!UNMARSHALLING(ps
) || !ps
->is_dynamic
) {
309 DEBUG(0,("prs_force_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
310 (unsigned int)extra_space
));
314 if((new_data
= Realloc(ps
->data_p
, new_size
)) == NULL
) {
315 DEBUG(0,("prs_force_grow: Realloc failure for size %u.\n",
316 (unsigned int)new_size
));
320 memset(&new_data
[ps
->buffer_size
], '\0', (size_t)(new_size
- ps
->buffer_size
));
322 ps
->buffer_size
= new_size
;
323 ps
->data_p
= new_data
;
328 /*******************************************************************
329 Get the data pointer (external interface).
330 ********************************************************************/
332 char *prs_data_p(prs_struct
*ps
)
337 /*******************************************************************
338 Get the current data size (external interface).
339 ********************************************************************/
341 uint32
prs_data_size(prs_struct
*ps
)
343 return ps
->buffer_size
;
346 /*******************************************************************
347 Fetch the current offset (external interface).
348 ********************************************************************/
350 uint32
prs_offset(prs_struct
*ps
)
352 return ps
->data_offset
;
355 /*******************************************************************
356 Set the current offset (external interface).
357 ********************************************************************/
359 BOOL
prs_set_offset(prs_struct
*ps
, uint32 offset
)
361 if(offset
<= ps
->data_offset
) {
362 ps
->data_offset
= offset
;
366 if(!prs_grow(ps
, offset
- ps
->data_offset
))
369 ps
->data_offset
= offset
;
373 /*******************************************************************
374 Append the data from one parse_struct into another.
375 ********************************************************************/
377 BOOL
prs_append_prs_data(prs_struct
*dst
, prs_struct
*src
)
379 if(!prs_grow(dst
, prs_offset(src
)))
382 memcpy(&dst
->data_p
[dst
->data_offset
], prs_data_p(src
), (size_t)prs_offset(src
));
383 dst
->data_offset
+= prs_offset(src
);
388 /*******************************************************************
389 Append some data from one parse_struct into another.
390 ********************************************************************/
392 BOOL
prs_append_some_prs_data(prs_struct
*dst
, prs_struct
*src
, int32 start
, uint32 len
)
397 if(!prs_grow(dst
, len
))
400 memcpy(&dst
->data_p
[dst
->data_offset
], prs_data_p(src
)+start
, (size_t)len
);
401 dst
->data_offset
+= len
;
406 /*******************************************************************
407 Append the data from a buffer into a parse_struct.
408 ********************************************************************/
410 BOOL
prs_append_data(prs_struct
*dst
, char *src
, uint32 len
)
412 if(!prs_grow(dst
, len
))
415 memcpy(&dst
->data_p
[dst
->data_offset
], src
, (size_t)len
);
416 dst
->data_offset
+= len
;
421 /*******************************************************************
422 Set the data as X-endian (external interface).
423 ********************************************************************/
425 void prs_set_endian_data(prs_struct
*ps
, BOOL endian
)
427 ps
->bigendian_data
= endian
;
430 /*******************************************************************
431 Align a the data_len to a multiple of align bytes - filling with
433 ********************************************************************/
435 BOOL
prs_align(prs_struct
*ps
)
437 uint32 mod
= ps
->data_offset
& (ps
->align
-1);
439 if (ps
->align
!= 0 && mod
!= 0) {
440 uint32 extra_space
= (ps
->align
- mod
);
441 if(!prs_grow(ps
, extra_space
))
443 memset(&ps
->data_p
[ps
->data_offset
], '\0', (size_t)extra_space
);
444 ps
->data_offset
+= extra_space
;
450 /******************************************************************
451 Align on a 2 byte boundary
452 *****************************************************************/
454 BOOL
prs_align_uint16(prs_struct
*ps
)
457 uint8 old_align
= ps
->align
;
461 ps
->align
= old_align
;
466 /******************************************************************
467 Align on a 8 byte boundary
468 *****************************************************************/
470 BOOL
prs_align_uint64(prs_struct
*ps
)
473 uint8 old_align
= ps
->align
;
477 ps
->align
= old_align
;
482 /*******************************************************************
483 Align only if required (for the unistr2 string mainly)
484 ********************************************************************/
486 BOOL
prs_align_needed(prs_struct
*ps
, uint32 needed
)
491 return prs_align(ps
);
494 /*******************************************************************
495 Ensure we can read/write to a given offset.
496 ********************************************************************/
498 char *prs_mem_get(prs_struct
*ps
, uint32 extra_size
)
500 if(UNMARSHALLING(ps
)) {
502 * If reading, ensure that we can read the requested size item.
504 if (ps
->data_offset
+ extra_size
> ps
->buffer_size
) {
505 DEBUG(0,("prs_mem_get: reading data of size %u would overrun buffer.\n",
506 (unsigned int)extra_size
));
511 * Writing - grow the buffer if needed.
513 if(!prs_grow(ps
, extra_size
))
516 return &ps
->data_p
[ps
->data_offset
];
519 /*******************************************************************
520 Change the struct type.
521 ********************************************************************/
523 void prs_switch_type(prs_struct
*ps
, BOOL io
)
525 if ((ps
->io
^ io
) == True
)
529 /*******************************************************************
530 Force a prs_struct to be dynamic even when it's size is 0.
531 ********************************************************************/
533 void prs_force_dynamic(prs_struct
*ps
)
538 /*******************************************************************
540 ********************************************************************/
542 BOOL
prs_uint8(char *name
, prs_struct
*ps
, int depth
, uint8
*data8
)
544 char *q
= prs_mem_get(ps
, 1);
548 if (UNMARSHALLING(ps
))
553 DEBUG(5,("%s%04x %s: %02x\n", tab_depth(depth
), ps
->data_offset
, name
, *data8
));
555 ps
->data_offset
+= 1;
560 /*******************************************************************
562 ********************************************************************/
564 BOOL
prs_uint16(char *name
, prs_struct
*ps
, int depth
, uint16
*data16
)
566 char *q
= prs_mem_get(ps
, sizeof(uint16
));
570 if (UNMARSHALLING(ps
)) {
571 if (ps
->bigendian_data
)
572 *data16
= RSVAL(q
,0);
576 if (ps
->bigendian_data
)
582 DEBUG(5,("%s%04x %s: %04x\n", tab_depth(depth
), ps
->data_offset
, name
, *data16
));
584 ps
->data_offset
+= sizeof(uint16
);
589 /*******************************************************************
591 ********************************************************************/
593 BOOL
prs_uint32(char *name
, prs_struct
*ps
, int depth
, uint32
*data32
)
595 char *q
= prs_mem_get(ps
, sizeof(uint32
));
599 if (UNMARSHALLING(ps
)) {
600 if (ps
->bigendian_data
)
601 *data32
= RIVAL(q
,0);
605 if (ps
->bigendian_data
)
611 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(depth
), ps
->data_offset
, name
, *data32
));
613 ps
->data_offset
+= sizeof(uint32
);
618 /*******************************************************************
620 ********************************************************************/
622 BOOL
prs_ntstatus(char *name
, prs_struct
*ps
, int depth
, NTSTATUS
*status
)
624 char *q
= prs_mem_get(ps
, sizeof(uint32
));
628 if (UNMARSHALLING(ps
)) {
629 if (ps
->bigendian_data
)
630 *status
= NT_STATUS(RIVAL(q
,0));
632 *status
= NT_STATUS(IVAL(q
,0));
634 if (ps
->bigendian_data
)
635 RSIVAL(q
,0,NT_STATUS_V(*status
));
637 SIVAL(q
,0,NT_STATUS_V(*status
));
640 DEBUG(5,("%s%04x %s: %s\n", tab_depth(depth
), ps
->data_offset
, name
,
641 nt_errstr(*status
)));
643 ps
->data_offset
+= sizeof(uint32
);
648 /*******************************************************************
650 ********************************************************************/
652 BOOL
prs_werror(char *name
, prs_struct
*ps
, int depth
, WERROR
*status
)
654 char *q
= prs_mem_get(ps
, sizeof(uint32
));
658 if (UNMARSHALLING(ps
)) {
659 if (ps
->bigendian_data
)
660 *status
= W_ERROR(RIVAL(q
,0));
662 *status
= W_ERROR(IVAL(q
,0));
664 if (ps
->bigendian_data
)
665 RSIVAL(q
,0,W_ERROR_V(*status
));
667 SIVAL(q
,0,W_ERROR_V(*status
));
670 DEBUG(5,("%s%04x %s: %s\n", tab_depth(depth
), ps
->data_offset
, name
,
671 dos_errstr(*status
)));
673 ps
->data_offset
+= sizeof(uint32
);
679 /******************************************************************
680 Stream an array of uint8s. Length is number of uint8s.
681 ********************************************************************/
683 BOOL
prs_uint8s(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint8
*data8s
, int len
)
686 char *q
= prs_mem_get(ps
, len
);
690 if (UNMARSHALLING(ps
)) {
691 for (i
= 0; i
< len
; i
++)
692 data8s
[i
] = CVAL(q
,i
);
694 for (i
= 0; i
< len
; i
++)
695 SCVAL(q
, i
, data8s
[i
]);
698 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
,name
));
700 print_asc(5, (unsigned char*)data8s
, len
);
702 for (i
= 0; i
< len
; i
++)
703 DEBUG(5,("%02x ", data8s
[i
]));
707 ps
->data_offset
+= len
;
712 /******************************************************************
713 Stream an array of uint16s. Length is number of uint16s.
714 ********************************************************************/
716 BOOL
prs_uint16s(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
719 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
723 if (UNMARSHALLING(ps
)) {
724 if (ps
->bigendian_data
) {
725 for (i
= 0; i
< len
; i
++)
726 data16s
[i
] = RSVAL(q
, 2*i
);
728 for (i
= 0; i
< len
; i
++)
729 data16s
[i
] = SVAL(q
, 2*i
);
732 if (ps
->bigendian_data
) {
733 for (i
= 0; i
< len
; i
++)
734 RSSVAL(q
, 2*i
, data16s
[i
]);
736 for (i
= 0; i
< len
; i
++)
737 SSVAL(q
, 2*i
, data16s
[i
]);
741 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
743 print_asc(5, (unsigned char*)data16s
, 2*len
);
745 for (i
= 0; i
< len
; i
++)
746 DEBUG(5,("%04x ", data16s
[i
]));
750 ps
->data_offset
+= (len
* sizeof(uint16
));
755 /******************************************************************
756 Start using a function for streaming unicode chars. If unmarshalling,
757 output must be little-endian, if marshalling, input must be little-endian.
758 ********************************************************************/
760 static void dbg_rw_punival(BOOL charmode
, char *name
, int depth
, prs_struct
*ps
,
761 char *in_buf
, char *out_buf
, int len
)
765 if (UNMARSHALLING(ps
)) {
766 if (ps
->bigendian_data
) {
767 for (i
= 0; i
< len
; i
++)
768 SSVAL(out_buf
,2*i
,RSVAL(in_buf
, 2*i
));
770 for (i
= 0; i
< len
; i
++)
771 SSVAL(out_buf
, 2*i
, SVAL(in_buf
, 2*i
));
774 if (ps
->bigendian_data
) {
775 for (i
= 0; i
< len
; i
++)
776 RSSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
778 for (i
= 0; i
< len
; i
++)
779 SSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
783 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
785 print_asc(5, (unsigned char*)out_buf
, 2*len
);
787 for (i
= 0; i
< len
; i
++)
788 DEBUG(5,("%04x ", out_buf
[i
]));
793 /******************************************************************
794 Stream a unistr. Always little endian.
795 ********************************************************************/
797 BOOL
prs_uint16uni(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
799 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
803 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, (char *)data16s
, len
);
804 ps
->data_offset
+= (len
* sizeof(uint16
));
809 /******************************************************************
810 Stream an array of uint32s. Length is number of uint32s.
811 ********************************************************************/
813 BOOL
prs_uint32s(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint32
*data32s
, int len
)
816 char *q
= prs_mem_get(ps
, len
* sizeof(uint32
));
820 if (UNMARSHALLING(ps
)) {
821 if (ps
->bigendian_data
) {
822 for (i
= 0; i
< len
; i
++)
823 data32s
[i
] = RIVAL(q
, 4*i
);
825 for (i
= 0; i
< len
; i
++)
826 data32s
[i
] = IVAL(q
, 4*i
);
829 if (ps
->bigendian_data
) {
830 for (i
= 0; i
< len
; i
++)
831 RSIVAL(q
, 4*i
, data32s
[i
]);
833 for (i
= 0; i
< len
; i
++)
834 SIVAL(q
, 4*i
, data32s
[i
]);
838 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
840 print_asc(5, (unsigned char*)data32s
, 4*len
);
842 for (i
= 0; i
< len
; i
++)
843 DEBUG(5,("%08x ", data32s
[i
]));
847 ps
->data_offset
+= (len
* sizeof(uint32
));
852 /******************************************************************
853 Stream an array of unicode string, length/buffer specified separately,
854 in uint16 chars. The unicode string is already in little-endian format.
855 ********************************************************************/
857 BOOL
prs_buffer5(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, BUFFER5
*str
)
860 char *q
= prs_mem_get(ps
, str
->buf_len
* sizeof(uint16
));
864 if (UNMARSHALLING(ps
)) {
865 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,str
->buf_len
* sizeof(uint16
));
866 if (str
->buffer
== NULL
)
870 /* If the string is empty, we don't have anything to stream */
874 p
= (char *)str
->buffer
;
876 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->buf_len
);
878 ps
->data_offset
+= (str
->buf_len
* sizeof(uint16
));
883 /******************************************************************
884 Stream a "not" unicode string, length/buffer specified separately,
885 in byte chars. String is in little-endian format.
886 ********************************************************************/
888 BOOL
prs_buffer2(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, BUFFER2
*str
)
891 char *q
= prs_mem_get(ps
, str
->buf_len
);
895 if (UNMARSHALLING(ps
)) {
896 if ( str
->buf_len
) {
897 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,str
->buf_len
);
898 if ( str
->buffer
== NULL
)
903 p
= (char *)str
->buffer
;
905 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->buf_len
/2);
906 ps
->data_offset
+= str
->buf_len
;
911 /******************************************************************
912 Stream a string, length/buffer specified separately,
914 ********************************************************************/
916 BOOL
prs_string2(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, STRING2
*str
)
919 char *q
= prs_mem_get(ps
, str
->str_max_len
);
923 if (UNMARSHALLING(ps
)) {
924 str
->buffer
= (unsigned char *)prs_alloc_mem(ps
,str
->str_max_len
);
925 if (str
->buffer
== NULL
)
929 if (UNMARSHALLING(ps
)) {
930 for (i
= 0; i
< str
->str_str_len
; i
++)
931 str
->buffer
[i
] = CVAL(q
,i
);
933 for (i
= 0; i
< str
->str_str_len
; i
++)
934 SCVAL(q
, i
, str
->buffer
[i
]);
937 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
939 print_asc(5, (unsigned char*)str
->buffer
, str
->str_str_len
);
941 for (i
= 0; i
< str
->str_str_len
; i
++)
942 DEBUG(5,("%02x ", str
->buffer
[i
]));
946 ps
->data_offset
+= str
->str_str_len
;
951 /******************************************************************
952 Stream a unicode string, length/buffer specified separately,
953 in uint16 chars. The unicode string is already in little-endian format.
954 ********************************************************************/
956 BOOL
prs_unistr2(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, UNISTR2
*str
)
959 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
963 /* If the string is empty, we don't have anything to stream */
964 if (str
->uni_str_len
==0)
967 if (UNMARSHALLING(ps
)) {
968 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,str
->uni_max_len
* sizeof(uint16
));
969 if (str
->buffer
== NULL
)
973 p
= (char *)str
->buffer
;
975 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
977 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
982 /******************************************************************
983 Stream a unicode string, length/buffer specified separately,
984 in uint16 chars. The unicode string is already in little-endian format.
985 ********************************************************************/
987 BOOL
prs_unistr3(BOOL charmode
, char *name
, UNISTR3
*str
, prs_struct
*ps
, int depth
)
990 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
994 if (UNMARSHALLING(ps
)) {
995 str
->str
.buffer
= (uint16
*)prs_alloc_mem(ps
,str
->uni_str_len
* sizeof(uint16
));
996 if (str
->str
.buffer
== NULL
)
1000 p
= (char *)str
->str
.buffer
;
1002 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
1003 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
1008 /*******************************************************************
1009 Stream a unicode null-terminated string. As the string is already
1010 in little-endian format then do it as a stream of bytes.
1011 ********************************************************************/
1013 BOOL
prs_unistr(char *name
, prs_struct
*ps
, int depth
, UNISTR
*str
)
1016 unsigned char *p
= (unsigned char *)str
->buffer
;
1022 if (MARSHALLING(ps
)) {
1024 for(len
= 0; str
->buffer
[len
] != 0; len
++)
1027 q
= prs_mem_get(ps
, (len
+1)*2);
1033 for(len
= 0; str
->buffer
[len
] != 0; len
++)
1035 if(ps
->bigendian_data
)
1037 /* swap bytes - p is little endian, q is big endian. */
1053 * even if the string is 'empty' (only an \0 char)
1054 * at this point the leading \0 hasn't been parsed.
1064 dump_data(5+depth
, (char *)start
, len
* 2);
1066 else { /* unmarshalling */
1068 uint32 alloc_len
= 0;
1069 q
= prs_data_p(ps
) + prs_offset(ps
);
1072 * Work out how much space we need and talloc it.
1074 max_len
= (ps
->buffer_size
- ps
->data_offset
)/sizeof(uint16
);
1076 /* the test of the value of *ptr helps to catch the circumstance
1077 where we have an emtpty (non-existent) string in the buffer */
1078 for ( ptr
= (uint16
*)q
; *ptr
&& (alloc_len
<= max_len
); alloc_len
++)
1082 /* should we allocate anything at all? */
1083 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,alloc_len
* sizeof(uint16
));
1084 if ((str
->buffer
== NULL
) && (alloc_len
> 0))
1087 p
= (unsigned char *)str
->buffer
;
1090 /* the (len < alloc_len) test is to prevent us from overwriting
1091 memory that is not ours...if we get that far, we have a non-null
1092 terminated string in the buffer and have messed up somewhere */
1093 while ((len
< alloc_len
) && (*(uint16
*)q
!= 0))
1095 if(ps
->bigendian_data
)
1097 /* swap bytes - q is big endian, p is little endian. */
1098 p
[0] = (unsigned char)q
[1];
1099 p
[1] = (unsigned char)q
[0];
1104 p
[0] = (unsigned char)q
[0];
1105 p
[1] = (unsigned char)q
[1];
1112 if (len
< alloc_len
)
1114 /* NULL terminate the UNISTR */
1115 str
->buffer
[len
++] = '\0';
1119 /* set the offset in the prs_struct; 'len' points to the
1120 terminiating NULL in the UNISTR so we need to go one more
1122 ps
->data_offset
+= (len
)*2;
1128 /*******************************************************************
1129 Stream a null-terminated string. len is strlen, and therefore does
1130 not include the null-termination character.
1131 ********************************************************************/
1133 BOOL
prs_string(char *name
, prs_struct
*ps
, int depth
, char *str
, int len
, int max_buf_size
)
1138 len
= MIN(len
, (max_buf_size
-1));
1140 q
= prs_mem_get(ps
, len
+1);
1144 for(i
= 0; i
< len
; i
++) {
1145 if (UNMARSHALLING(ps
))
1151 /* The terminating null. */
1154 if (MARSHALLING(ps
)) {
1158 ps
->data_offset
+= len
+1;
1160 dump_data(5+depth
, q
, len
);
1165 /*******************************************************************
1166 prs_uint16 wrapper. Call this and it sets up a pointer to where the
1167 uint16 should be stored, or gets the size if reading.
1168 ********************************************************************/
1170 BOOL
prs_uint16_pre(char *name
, prs_struct
*ps
, int depth
, uint16
*data16
, uint32
*offset
)
1172 *offset
= ps
->data_offset
;
1173 if (UNMARSHALLING(ps
)) {
1175 return prs_uint16(name
, ps
, depth
, data16
);
1177 char *q
= prs_mem_get(ps
, sizeof(uint16
));
1180 ps
->data_offset
+= sizeof(uint16
);
1185 /*******************************************************************
1186 prs_uint16 wrapper. call this and it retrospectively stores the size.
1187 does nothing on reading, as that is already handled by ...._pre()
1188 ********************************************************************/
1190 BOOL
prs_uint16_post(char *name
, prs_struct
*ps
, int depth
, uint16
*data16
,
1191 uint32 ptr_uint16
, uint32 start_offset
)
1193 if (MARSHALLING(ps
)) {
1195 * Writing - temporarily move the offset pointer.
1197 uint16 data_size
= ps
->data_offset
- start_offset
;
1198 uint32 old_offset
= ps
->data_offset
;
1200 ps
->data_offset
= ptr_uint16
;
1201 if(!prs_uint16(name
, ps
, depth
, &data_size
)) {
1202 ps
->data_offset
= old_offset
;
1205 ps
->data_offset
= old_offset
;
1207 ps
->data_offset
= start_offset
+ (uint32
)(*data16
);
1212 /*******************************************************************
1213 prs_uint32 wrapper. Call this and it sets up a pointer to where the
1214 uint32 should be stored, or gets the size if reading.
1215 ********************************************************************/
1217 BOOL
prs_uint32_pre(char *name
, prs_struct
*ps
, int depth
, uint32
*data32
, uint32
*offset
)
1219 *offset
= ps
->data_offset
;
1220 if (UNMARSHALLING(ps
) && (data32
!= NULL
)) {
1222 return prs_uint32(name
, ps
, depth
, data32
);
1224 ps
->data_offset
+= sizeof(uint32
);
1229 /*******************************************************************
1230 prs_uint32 wrapper. call this and it retrospectively stores the size.
1231 does nothing on reading, as that is already handled by ...._pre()
1232 ********************************************************************/
1234 BOOL
prs_uint32_post(char *name
, prs_struct
*ps
, int depth
, uint32
*data32
,
1235 uint32 ptr_uint32
, uint32 data_size
)
1237 if (MARSHALLING(ps
)) {
1239 * Writing - temporarily move the offset pointer.
1241 uint32 old_offset
= ps
->data_offset
;
1242 ps
->data_offset
= ptr_uint32
;
1243 if(!prs_uint32(name
, ps
, depth
, &data_size
)) {
1244 ps
->data_offset
= old_offset
;
1247 ps
->data_offset
= old_offset
;
1252 /* useful function to store a structure in rpc wire format */
1253 int tdb_prs_store(TDB_CONTEXT
*tdb
, char *keystr
, prs_struct
*ps
)
1255 TDB_DATA kbuf
, dbuf
;
1257 kbuf
.dsize
= strlen(keystr
)+1;
1258 dbuf
.dptr
= prs_data_p(ps
);
1259 dbuf
.dsize
= prs_offset(ps
);
1260 return tdb_store(tdb
, kbuf
, dbuf
, TDB_REPLACE
);
1263 /* useful function to fetch a structure into rpc wire format */
1264 int tdb_prs_fetch(TDB_CONTEXT
*tdb
, char *keystr
, prs_struct
*ps
, TALLOC_CTX
*mem_ctx
)
1266 TDB_DATA kbuf
, dbuf
;
1268 kbuf
.dsize
= strlen(keystr
)+1;
1270 dbuf
= tdb_fetch(tdb
, kbuf
);
1271 if (!dbuf
.dptr
) return -1;
1274 prs_init(ps
, 0, mem_ctx
, UNMARSHALL
);
1275 prs_give_memory(ps
, dbuf
.dptr
, dbuf
.dsize
, True
);
1280 /*******************************************************************
1282 ********************************************************************/
1283 BOOL
prs_hash1(prs_struct
*ps
, uint32 offset
, uint8 sess_key
[16])
1290 #ifdef DEBUG_PASSWORD
1291 DEBUG(100, ("prs_hash1\n"));
1292 dump_data(100, sess_key
, 16);
1293 dump_data(100, q
, 68);
1295 SamOEMhash((uchar
*) q
, sess_key
, 68);
1297 #ifdef DEBUG_PASSWORD
1298 dump_data(100, q
, 68);