2 Unix SMB/Netbios implementation.
4 Samba memory buffer functions
5 Copyright (C) Andrew Tridgell 1992-1997
6 Copyright (C) Luke Kenneth Casson Leighton 1996-1997
7 Copyright (C) Jeremy Allison 1999.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 extern int DEBUGLEVEL
;
29 /*******************************************************************
31 ********************************************************************/
32 void prs_dump(char *name
, int v
, prs_struct
*ps
)
36 if (DEBUGLEVEL
< 50) return;
39 slprintf(fname
,sizeof(fname
)-1, "/tmp/%s_%d.%d.prs", name
, v
, i
);
41 slprintf(fname
,sizeof(fname
)-1, "/tmp/%s.%d.prs", name
, i
);
43 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
44 if (fd
!= -1 || errno
!= EEXIST
) break;
47 write(fd
, ps
->data_p
+ ps
->data_offset
, ps
->buffer_size
- ps
->data_offset
);
49 DEBUG(0,("created %s\n", fname
));
55 /*******************************************************************
56 debug output for parsing info.
58 XXXX side-effect of this function is to increase the debug depth XXXX
60 ********************************************************************/
61 void prs_debug(prs_struct
*ps
, int depth
, char *desc
, char *fn_name
)
63 DEBUG(5+depth
, ("%s%06x %s %s\n", tab_depth(depth
), ps
->data_offset
, fn_name
, desc
));
67 /*******************************************************************
68 Initialise a parse structure - malloc the data if requested.
69 ********************************************************************/
70 BOOL
prs_init(prs_struct
*ps
, uint32 size
, TALLOC_CTX
*ctx
, BOOL io
)
74 ps
->bigendian_data
= RPC_LITTLE_ENDIAN
;
75 ps
->align
= RPC_PARSE_ALIGN
;
76 ps
->is_dynamic
= False
;
83 ps
->buffer_size
= size
;
84 if((ps
->data_p
= (char *)malloc((size_t)size
)) == NULL
) {
85 DEBUG(0,("prs_init: malloc fail for %u bytes.\n", (unsigned int)size
));
88 ps
->is_dynamic
= True
; /* We own this memory. */
94 /*******************************************************************
95 read from a socket into memory.
96 ********************************************************************/
97 BOOL
prs_read(prs_struct
*ps
, int fd
, size_t len
, int timeout
)
100 size_t prev_size
= ps
->buffer_size
;
101 if (!prs_grow(ps
, len
))
105 ok
= (read_with_timeout(fd
, &ps
->data_p
[prev_size
],
106 len
, len
,timeout
) == len
);
108 ok
= (read_data(fd
, &ps
->data_p
[prev_size
], len
) == len
);
113 /*******************************************************************
114 Delete the memory in a parse structure - if we own it.
115 ********************************************************************/
117 void prs_mem_free(prs_struct
*ps
)
119 if(ps
->is_dynamic
&& (ps
->data_p
!= NULL
))
121 ps
->is_dynamic
= False
;
127 /*******************************************************************
128 Allocate memory when unmarshalling... Always zero clears.
129 ********************************************************************/
131 char *prs_alloc_mem(prs_struct
*ps
, size_t size
)
133 char *ret
= talloc(ps
->mem_ctx
, size
);
136 memset(ret
, '\0', size
);
141 /*******************************************************************
142 Return the current talloc context we're using.
143 ********************************************************************/
145 TALLOC_CTX
*prs_get_mem_context(prs_struct
*ps
)
150 /*******************************************************************
151 Hand some already allocated memory to a prs_struct.
152 ********************************************************************/
154 void prs_give_memory(prs_struct
*ps
, char *buf
, uint32 size
, BOOL is_dynamic
)
156 ps
->is_dynamic
= is_dynamic
;
158 ps
->buffer_size
= size
;
161 /*******************************************************************
162 Take some memory back from a prs_struct.
163 ********************************************************************/
165 char *prs_take_memory(prs_struct
*ps
, uint32
*psize
)
167 char *ret
= ps
->data_p
;
169 *psize
= ps
->buffer_size
;
170 ps
->is_dynamic
= False
;
175 /*******************************************************************
176 Set a prs_struct to exactly a given size. Will grow or tuncate if neccessary.
177 ********************************************************************/
179 BOOL
prs_set_buffer_size(prs_struct
*ps
, uint32 newsize
)
181 if (newsize
> ps
->buffer_size
)
182 return prs_force_grow(ps
, newsize
- ps
->buffer_size
);
184 if (newsize
< ps
->buffer_size
) {
185 char *new_data_p
= Realloc(ps
->data_p
, newsize
);
186 /* if newsize is zero, Realloc acts like free() & returns NULL*/
187 if (new_data_p
== NULL
&& newsize
!= 0) {
188 DEBUG(0,("prs_set_buffer_size: Realloc failure for size %u.\n",
189 (unsigned int)newsize
));
190 DEBUG(0,("prs_set_buffer_size: Reason %s\n",strerror(errno
)));
193 ps
->data_p
= new_data_p
;
194 ps
->buffer_size
= newsize
;
200 /*******************************************************************
201 Attempt, if needed, to grow a data buffer.
202 Also depends on the data stream mode (io).
203 ********************************************************************/
205 BOOL
prs_grow(prs_struct
*ps
, uint32 extra_space
)
210 ps
->grow_size
= MAX(ps
->grow_size
, ps
->data_offset
+ extra_space
);
212 if(ps
->data_offset
+ extra_space
<= ps
->buffer_size
)
216 * We cannot grow the buffer if we're not reading
217 * into the prs_struct, or if we don't own the memory.
220 if(UNMARSHALLING(ps
) || !ps
->is_dynamic
) {
221 DEBUG(0,("prs_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
222 (unsigned int)extra_space
));
227 * Decide how much extra space we really need.
230 extra_space
-= (ps
->buffer_size
- ps
->data_offset
);
231 if(ps
->buffer_size
== 0) {
233 * Ensure we have at least a PDU's length, or extra_space, whichever
237 new_size
= MAX(MAX_PDU_FRAG_LEN
,extra_space
);
239 if((new_data
= malloc(new_size
)) == NULL
) {
240 DEBUG(0,("prs_grow: Malloc failure for size %u.\n", (unsigned int)new_size
));
243 memset(new_data
, '\0', new_size
);
246 * If the current buffer size is bigger than the space needed, just
247 * double it, else add extra_space.
249 new_size
= MAX(ps
->buffer_size
*2, ps
->buffer_size
+ extra_space
);
251 if ((new_data
= Realloc(ps
->data_p
, new_size
)) == NULL
) {
252 DEBUG(0,("prs_grow: Realloc failure for size %u.\n",
253 (unsigned int)new_size
));
257 memset(&new_data
[ps
->buffer_size
], '\0', new_size
- ps
->buffer_size
);
259 ps
->buffer_size
= new_size
;
260 ps
->data_p
= new_data
;
265 /*******************************************************************
266 Attempt to force a data buffer to grow by len bytes.
267 This is only used when appending more data onto a prs_struct
268 when reading an rpc reply, before unmarshalling it.
269 ********************************************************************/
271 BOOL
prs_force_grow(prs_struct
*ps
, uint32 extra_space
)
273 uint32 new_size
= ps
->buffer_size
+ extra_space
;
276 if(!UNMARSHALLING(ps
) || !ps
->is_dynamic
) {
277 DEBUG(0,("prs_force_grow: Buffer overflow - unable to expand buffer by %u bytes.\n",
278 (unsigned int)extra_space
));
282 if((new_data
= Realloc(ps
->data_p
, new_size
)) == NULL
) {
283 DEBUG(0,("prs_force_grow: Realloc failure for size %u.\n",
284 (unsigned int)new_size
));
288 memset(&new_data
[ps
->buffer_size
], '\0', new_size
- ps
->buffer_size
);
290 ps
->buffer_size
= new_size
;
291 ps
->data_p
= new_data
;
296 /*******************************************************************
297 Get the data pointer (external interface).
298 ********************************************************************/
300 char *prs_data_p(prs_struct
*ps
)
305 /*******************************************************************
306 Get the current data size (external interface).
307 ********************************************************************/
309 uint32
prs_data_size(prs_struct
*ps
)
311 return ps
->buffer_size
;
314 /*******************************************************************
315 Fetch the current offset (external interface).
316 ********************************************************************/
318 uint32
prs_offset(prs_struct
*ps
)
320 return ps
->data_offset
;
323 /*******************************************************************
324 Set the current offset (external interface).
325 ********************************************************************/
327 BOOL
prs_set_offset(prs_struct
*ps
, uint32 offset
)
329 if(offset
<= ps
->data_offset
) {
330 ps
->data_offset
= offset
;
334 if(!prs_grow(ps
, offset
- ps
->data_offset
))
337 ps
->data_offset
= offset
;
341 /*******************************************************************
342 Append the data from one parse_struct into another.
343 ********************************************************************/
345 BOOL
prs_append_prs_data(prs_struct
*dst
, prs_struct
*src
)
347 if(!prs_grow(dst
, prs_offset(src
)))
350 memcpy(&dst
->data_p
[dst
->data_offset
], prs_data_p(src
), (size_t)prs_offset(src
));
351 dst
->data_offset
+= prs_offset(src
);
356 /*******************************************************************
357 Append some data from one parse_struct into another.
358 ********************************************************************/
360 BOOL
prs_append_some_prs_data(prs_struct
*dst
, prs_struct
*src
, int32 start
, uint32 len
)
365 if(!prs_grow(dst
, len
))
368 memcpy(&dst
->data_p
[dst
->data_offset
], prs_data_p(src
)+start
, (size_t)len
);
369 dst
->data_offset
+= len
;
374 /*******************************************************************
375 Append the data from a buffer into a parse_struct.
376 ********************************************************************/
378 BOOL
prs_append_data(prs_struct
*dst
, char *src
, uint32 len
)
380 if(!prs_grow(dst
, len
))
383 memcpy(&dst
->data_p
[dst
->data_offset
], src
, (size_t)len
);
384 dst
->data_offset
+= len
;
389 /*******************************************************************
390 Set the data as X-endian (external interface).
391 ********************************************************************/
393 void prs_set_endian_data(prs_struct
*ps
, BOOL endian
)
395 ps
->bigendian_data
= endian
;
398 /*******************************************************************
399 Align a the data_len to a multiple of align bytes - filling with
401 ********************************************************************/
403 BOOL
prs_align(prs_struct
*ps
)
405 uint32 mod
= ps
->data_offset
& (ps
->align
-1);
407 if (ps
->align
!= 0 && mod
!= 0) {
408 uint32 extra_space
= (ps
->align
- mod
);
409 if(!prs_grow(ps
, extra_space
))
411 memset(&ps
->data_p
[ps
->data_offset
], '\0', (size_t)extra_space
);
412 ps
->data_offset
+= extra_space
;
418 /*******************************************************************
419 Align only if required (for the unistr2 string mainly)
420 ********************************************************************/
422 BOOL
prs_align_needed(prs_struct
*ps
, uint32 needed
)
427 return prs_align(ps
);
430 /*******************************************************************
431 Ensure we can read/write to a given offset.
432 ********************************************************************/
434 char *prs_mem_get(prs_struct
*ps
, uint32 extra_size
)
436 if(UNMARSHALLING(ps
)) {
438 * If reading, ensure that we can read the requested size item.
440 if (ps
->data_offset
+ extra_size
> ps
->buffer_size
) {
441 DEBUG(0,("prs_mem_get: reading data of size %u would overrun buffer.\n",
442 (unsigned int)extra_size
));
447 * Writing - grow the buffer if needed.
449 if(!prs_grow(ps
, extra_size
))
452 return &ps
->data_p
[ps
->data_offset
];
455 /*******************************************************************
456 Change the struct type.
457 ********************************************************************/
459 void prs_switch_type(prs_struct
*ps
, BOOL io
)
461 if ((ps
->io
^ io
) == True
)
465 /*******************************************************************
466 Force a prs_struct to be dynamic even when it's size is 0.
467 ********************************************************************/
469 void prs_force_dynamic(prs_struct
*ps
)
474 /*******************************************************************
476 ********************************************************************/
478 BOOL
prs_uint8(char *name
, prs_struct
*ps
, int depth
, uint8
*data8
)
480 char *q
= prs_mem_get(ps
, 1);
484 if (UNMARSHALLING(ps
))
489 DEBUG(5,("%s%04x %s: %02x\n", tab_depth(depth
), ps
->data_offset
, name
, *data8
));
491 ps
->data_offset
+= 1;
496 /*******************************************************************
498 ********************************************************************/
500 BOOL
prs_uint16(char *name
, prs_struct
*ps
, int depth
, uint16
*data16
)
502 char *q
= prs_mem_get(ps
, sizeof(uint16
));
506 if (UNMARSHALLING(ps
)) {
507 if (ps
->bigendian_data
)
508 *data16
= RSVAL(q
,0);
512 if (ps
->bigendian_data
)
518 DEBUG(5,("%s%04x %s: %04x\n", tab_depth(depth
), ps
->data_offset
, name
, *data16
));
520 ps
->data_offset
+= sizeof(uint16
);
525 /*******************************************************************
527 ********************************************************************/
529 BOOL
prs_uint32(char *name
, prs_struct
*ps
, int depth
, uint32
*data32
)
531 char *q
= prs_mem_get(ps
, sizeof(uint32
));
535 if (UNMARSHALLING(ps
)) {
536 if (ps
->bigendian_data
)
537 *data32
= RIVAL(q
,0);
541 if (ps
->bigendian_data
)
547 DEBUG(5,("%s%04x %s: %08x\n", tab_depth(depth
), ps
->data_offset
, name
, *data32
));
549 ps
->data_offset
+= sizeof(uint32
);
554 /******************************************************************
555 Stream an array of uint8s. Length is number of uint8s.
556 ********************************************************************/
558 BOOL
prs_uint8s(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint8
*data8s
, int len
)
561 char *q
= prs_mem_get(ps
, len
);
565 if (UNMARSHALLING(ps
)) {
566 for (i
= 0; i
< len
; i
++)
567 data8s
[i
] = CVAL(q
,i
);
569 for (i
= 0; i
< len
; i
++)
570 SCVAL(q
, i
, data8s
[i
]);
573 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
,name
));
575 print_asc(5, (unsigned char*)data8s
, len
);
577 for (i
= 0; i
< len
; i
++)
578 DEBUG(5,("%02x ", data8s
[i
]));
582 ps
->data_offset
+= len
;
587 /******************************************************************
588 Stream an array of uint16s. Length is number of uint16s.
589 ********************************************************************/
591 BOOL
prs_uint16s(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
594 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
598 if (UNMARSHALLING(ps
)) {
599 if (ps
->bigendian_data
) {
600 for (i
= 0; i
< len
; i
++)
601 data16s
[i
] = RSVAL(q
, 2*i
);
603 for (i
= 0; i
< len
; i
++)
604 data16s
[i
] = SVAL(q
, 2*i
);
607 if (ps
->bigendian_data
) {
608 for (i
= 0; i
< len
; i
++)
609 RSSVAL(q
, 2*i
, data16s
[i
]);
611 for (i
= 0; i
< len
; i
++)
612 SSVAL(q
, 2*i
, data16s
[i
]);
616 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
618 print_asc(5, (unsigned char*)data16s
, 2*len
);
620 for (i
= 0; i
< len
; i
++)
621 DEBUG(5,("%04x ", data16s
[i
]));
625 ps
->data_offset
+= (len
* sizeof(uint16
));
630 /******************************************************************
631 Start using a function for streaming unicode chars. If unmarshalling,
632 output must be little-endian, if marshalling, input must be little-endian.
633 ********************************************************************/
635 static void dbg_rw_punival(BOOL charmode
, char *name
, int depth
, prs_struct
*ps
,
636 char *in_buf
, char *out_buf
, int len
)
640 if (UNMARSHALLING(ps
)) {
641 if (ps
->bigendian_data
) {
642 for (i
= 0; i
< len
; i
++)
643 SSVAL(out_buf
,2*i
,RSVAL(in_buf
, 2*i
));
645 for (i
= 0; i
< len
; i
++)
646 SSVAL(out_buf
, 2*i
, SVAL(in_buf
, 2*i
));
649 if (ps
->bigendian_data
) {
650 for (i
= 0; i
< len
; i
++)
651 RSSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
653 for (i
= 0; i
< len
; i
++)
654 SSVAL(in_buf
, 2*i
, SVAL(out_buf
,2*i
));
658 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
660 print_asc(5, (unsigned char*)out_buf
, 2*len
);
662 for (i
= 0; i
< len
; i
++)
663 DEBUG(5,("%04x ", out_buf
[i
]));
668 /******************************************************************
669 Stream a unistr. Always little endian.
670 ********************************************************************/
672 BOOL
prs_uint16uni(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint16
*data16s
, int len
)
674 char *q
= prs_mem_get(ps
, len
* sizeof(uint16
));
678 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, (char *)data16s
, len
);
679 ps
->data_offset
+= (len
* sizeof(uint16
));
684 /******************************************************************
685 Stream an array of uint32s. Length is number of uint32s.
686 ********************************************************************/
688 BOOL
prs_uint32s(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, uint32
*data32s
, int len
)
691 char *q
= prs_mem_get(ps
, len
* sizeof(uint32
));
695 if (UNMARSHALLING(ps
)) {
696 if (ps
->bigendian_data
) {
697 for (i
= 0; i
< len
; i
++)
698 data32s
[i
] = RIVAL(q
, 4*i
);
700 for (i
= 0; i
< len
; i
++)
701 data32s
[i
] = IVAL(q
, 4*i
);
704 if (ps
->bigendian_data
) {
705 for (i
= 0; i
< len
; i
++)
706 RSIVAL(q
, 4*i
, data32s
[i
]);
708 for (i
= 0; i
< len
; i
++)
709 SIVAL(q
, 4*i
, data32s
[i
]);
713 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
715 print_asc(5, (unsigned char*)data32s
, 4*len
);
717 for (i
= 0; i
< len
; i
++)
718 DEBUG(5,("%08x ", data32s
[i
]));
722 ps
->data_offset
+= (len
* sizeof(uint32
));
727 /******************************************************************
728 Stream an array of unicode string, length/buffer specified separately,
729 in uint16 chars. The unicode string is already in little-endian format.
730 ********************************************************************/
732 BOOL
prs_buffer5(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, BUFFER5
*str
)
735 char *q
= prs_mem_get(ps
, str
->buf_len
* sizeof(uint16
));
739 if (UNMARSHALLING(ps
)) {
740 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,str
->buf_len
* sizeof(uint16
));
741 if (str
->buffer
== NULL
)
745 /* If the string is empty, we don't have anything to stream */
749 p
= (char *)str
->buffer
;
751 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->buf_len
);
753 ps
->data_offset
+= (str
->buf_len
* sizeof(uint16
));
758 /******************************************************************
759 Stream a "not" unicode string, length/buffer specified separately,
760 in byte chars. String is in little-endian format.
761 ********************************************************************/
763 BOOL
prs_buffer2(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, BUFFER2
*str
)
766 char *q
= prs_mem_get(ps
, str
->buf_len
);
770 if (UNMARSHALLING(ps
)) {
771 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,str
->buf_len
);
772 if (str
->buffer
== NULL
)
776 p
= (char *)str
->buffer
;
778 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->buf_len
/2);
779 ps
->data_offset
+= str
->buf_len
;
784 /******************************************************************
785 Stream a string, length/buffer specified separately,
787 ********************************************************************/
789 BOOL
prs_string2(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, STRING2
*str
)
792 char *q
= prs_mem_get(ps
, str
->str_str_len
);
796 if (UNMARSHALLING(ps
)) {
797 str
->buffer
= (unsigned char *)prs_alloc_mem(ps
,str
->str_str_len
);
798 if (str
->buffer
== NULL
)
802 if (UNMARSHALLING(ps
)) {
803 for (i
= 0; i
< str
->str_str_len
; i
++)
804 str
->buffer
[i
] = CVAL(q
,i
);
806 for (i
= 0; i
< str
->str_str_len
; i
++)
807 SCVAL(q
, i
, str
->buffer
[i
]);
810 DEBUG(5,("%s%04x %s: ", tab_depth(depth
), ps
->data_offset
, name
));
812 print_asc(5, (unsigned char*)str
->buffer
, str
->str_str_len
);
814 for (i
= 0; i
< str
->str_str_len
; i
++)
815 DEBUG(5,("%02x ", str
->buffer
[i
]));
819 ps
->data_offset
+= str
->str_str_len
;
824 /******************************************************************
825 Stream a unicode string, length/buffer specified separately,
826 in uint16 chars. The unicode string is already in little-endian format.
827 ********************************************************************/
829 BOOL
prs_unistr2(BOOL charmode
, char *name
, prs_struct
*ps
, int depth
, UNISTR2
*str
)
832 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
836 /* If the string is empty, we don't have anything to stream */
837 if (str
->uni_str_len
==0)
840 if (UNMARSHALLING(ps
)) {
841 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,str
->uni_max_len
* sizeof(uint16
));
842 if (str
->buffer
== NULL
)
846 p
= (char *)str
->buffer
;
848 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
850 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
855 /******************************************************************
856 Stream a unicode string, length/buffer specified separately,
857 in uint16 chars. The unicode string is already in little-endian format.
858 ********************************************************************/
860 BOOL
prs_unistr3(BOOL charmode
, char *name
, UNISTR3
*str
, prs_struct
*ps
, int depth
)
863 char *q
= prs_mem_get(ps
, str
->uni_str_len
* sizeof(uint16
));
867 if (UNMARSHALLING(ps
)) {
868 str
->str
.buffer
= (uint16
*)prs_alloc_mem(ps
,str
->uni_str_len
* sizeof(uint16
));
869 if (str
->str
.buffer
== NULL
)
873 p
= (char *)str
->str
.buffer
;
875 dbg_rw_punival(charmode
, name
, depth
, ps
, q
, p
, str
->uni_str_len
);
876 ps
->data_offset
+= (str
->uni_str_len
* sizeof(uint16
));
881 /*******************************************************************
882 Stream a unicode null-terminated string. As the string is already
883 in little-endian format then do it as a stream of bytes.
884 ********************************************************************/
886 BOOL
prs_unistr(char *name
, prs_struct
*ps
, int depth
, UNISTR
*str
)
889 unsigned char *p
= (unsigned char *)str
->buffer
;
895 if (MARSHALLING(ps
)) {
897 for(len
= 0; str
->buffer
[len
] != 0; len
++)
900 q
= prs_mem_get(ps
, (len
+1)*2);
906 for(len
= 0; str
->buffer
[len
] != 0; len
++)
908 if(ps
->bigendian_data
)
910 /* swap bytes - p is little endian, q is big endian. */
926 * even if the string is 'empty' (only an \0 char)
927 * at this point the leading \0 hasn't been parsed.
937 dump_data(5+depth
, (char *)start
, len
* 2);
939 else { /* unmarshalling */
941 uint32 alloc_len
= 0;
942 q
= prs_data_p(ps
) + prs_offset(ps
);
945 * Work out how much space we need and talloc it.
947 max_len
= (ps
->buffer_size
- ps
->data_offset
)/sizeof(uint16
);
949 /* the test of the value of *ptr helps to catch the circumstance
950 where we have an emtpty (non-existent) string in the buffer */
951 for ( ptr
= (uint16
*)q
; *ptr
&& (alloc_len
<= max_len
); alloc_len
++)
955 /* should we allocate anything at all? */
956 str
->buffer
= (uint16
*)prs_alloc_mem(ps
,alloc_len
* sizeof(uint16
));
957 if ((str
->buffer
== NULL
) && (alloc_len
> 0))
960 p
= (unsigned char *)str
->buffer
;
963 /* the (len < alloc_len) test is to prevent us from overwriting
964 memory that is not ours...if we get that far, we have a non-null
965 terminated string in the buffer and have messed up somewhere */
966 while ((len
< alloc_len
) && (*(uint16
*)q
!= 0))
968 if(ps
->bigendian_data
)
970 /* swap bytes - q is big endian, p is little endian. */
971 p
[0] = (unsigned char)q
[1];
972 p
[1] = (unsigned char)q
[0];
977 p
[0] = (unsigned char)q
[0];
978 p
[1] = (unsigned char)q
[1];
987 /* NULL terminate the UNISTR */
988 str
->buffer
[len
++] = '\0';
992 /* set the offset in the prs_struct; 'len' points to the
993 terminiating NULL in the UNISTR so we need to go one more
995 ps
->data_offset
+= (len
)*2;
1001 /*******************************************************************
1002 Stream a null-terminated string. len is strlen, and therefore does
1003 not include the null-termination character.
1004 ********************************************************************/
1006 BOOL
prs_string(char *name
, prs_struct
*ps
, int depth
, char *str
, int len
, int max_buf_size
)
1011 len
= MIN(len
, (max_buf_size
-1));
1013 q
= prs_mem_get(ps
, len
+1);
1017 for(i
= 0; i
< len
; i
++) {
1018 if (UNMARSHALLING(ps
))
1024 /* The terminating null. */
1027 if (MARSHALLING(ps
)) {
1031 ps
->data_offset
+= len
+1;
1033 dump_data(5+depth
, q
, len
);
1038 /*******************************************************************
1039 prs_uint16 wrapper. Call this and it sets up a pointer to where the
1040 uint16 should be stored, or gets the size if reading.
1041 ********************************************************************/
1043 BOOL
prs_uint16_pre(char *name
, prs_struct
*ps
, int depth
, uint16
*data16
, uint32
*offset
)
1045 *offset
= ps
->data_offset
;
1046 if (UNMARSHALLING(ps
)) {
1048 return prs_uint16(name
, ps
, depth
, data16
);
1050 char *q
= prs_mem_get(ps
, sizeof(uint16
));
1053 ps
->data_offset
+= sizeof(uint16
);
1058 /*******************************************************************
1059 prs_uint16 wrapper. call this and it retrospectively stores the size.
1060 does nothing on reading, as that is already handled by ...._pre()
1061 ********************************************************************/
1063 BOOL
prs_uint16_post(char *name
, prs_struct
*ps
, int depth
, uint16
*data16
,
1064 uint32 ptr_uint16
, uint32 start_offset
)
1066 if (MARSHALLING(ps
)) {
1068 * Writing - temporarily move the offset pointer.
1070 uint16 data_size
= ps
->data_offset
- start_offset
;
1071 uint32 old_offset
= ps
->data_offset
;
1073 ps
->data_offset
= ptr_uint16
;
1074 if(!prs_uint16(name
, ps
, depth
, &data_size
)) {
1075 ps
->data_offset
= old_offset
;
1078 ps
->data_offset
= old_offset
;
1080 ps
->data_offset
= start_offset
+ (uint32
)(*data16
);
1085 /*******************************************************************
1086 prs_uint32 wrapper. Call this and it sets up a pointer to where the
1087 uint32 should be stored, or gets the size if reading.
1088 ********************************************************************/
1090 BOOL
prs_uint32_pre(char *name
, prs_struct
*ps
, int depth
, uint32
*data32
, uint32
*offset
)
1092 *offset
= ps
->data_offset
;
1093 if (UNMARSHALLING(ps
) && (data32
!= NULL
)) {
1095 return prs_uint32(name
, ps
, depth
, data32
);
1097 ps
->data_offset
+= sizeof(uint32
);
1102 /*******************************************************************
1103 prs_uint32 wrapper. call this and it retrospectively stores the size.
1104 does nothing on reading, as that is already handled by ...._pre()
1105 ********************************************************************/
1107 BOOL
prs_uint32_post(char *name
, prs_struct
*ps
, int depth
, uint32
*data32
,
1108 uint32 ptr_uint32
, uint32 data_size
)
1110 if (MARSHALLING(ps
)) {
1112 * Writing - temporarily move the offset pointer.
1114 uint32 old_offset
= ps
->data_offset
;
1115 ps
->data_offset
= ptr_uint32
;
1116 if(!prs_uint32(name
, ps
, depth
, &data_size
)) {
1117 ps
->data_offset
= old_offset
;
1120 ps
->data_offset
= old_offset
;
1125 /* useful function to store a structure in rpc wire format */
1126 int tdb_prs_store(TDB_CONTEXT
*tdb
, char *keystr
, prs_struct
*ps
)
1128 TDB_DATA kbuf
, dbuf
;
1130 kbuf
.dsize
= strlen(keystr
)+1;
1131 dbuf
.dptr
= prs_data_p(ps
);
1132 dbuf
.dsize
= prs_offset(ps
);
1133 return tdb_store(tdb
, kbuf
, dbuf
, TDB_REPLACE
);
1136 /* useful function to fetch a structure into rpc wire format */
1137 int tdb_prs_fetch(TDB_CONTEXT
*tdb
, char *keystr
, prs_struct
*ps
, TALLOC_CTX
*mem_ctx
)
1139 TDB_DATA kbuf
, dbuf
;
1141 kbuf
.dsize
= strlen(keystr
)+1;
1143 dbuf
= tdb_fetch(tdb
, kbuf
);
1144 if (!dbuf
.dptr
) return -1;
1147 prs_init(ps
, 0, mem_ctx
, UNMARSHALL
);
1148 prs_give_memory(ps
, dbuf
.dptr
, dbuf
.dsize
, True
);