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 /*******************************************************************
556 ********************************************************************/
558 BOOL prs_ntstatus(char *name, prs_struct *ps, int depth, NTSTATUS *status)
560 char *q = prs_mem_get(ps, sizeof(uint32));
564 if (UNMARSHALLING(ps)) {
565 if (ps->bigendian_data)
566 *status = NT_STATUS(RIVAL(q,0));
568 *status = NT_STATUS(IVAL(q,0));
570 if (ps->bigendian_data)
571 RSIVAL(q,0,NT_STATUS_V(*status));
573 SIVAL(q,0,NT_STATUS_V(*status));
576 DEBUG(5,("%s%04x %s: %s\n", tab_depth(depth), ps->data_offset, name,
577 get_nt_error_msg(*status)));
579 ps->data_offset += sizeof(uint32);
584 /*******************************************************************
586 ********************************************************************/
588 BOOL prs_werror(char *name, prs_struct *ps, int depth, WERROR *status)
590 char *q = prs_mem_get(ps, sizeof(uint32));
594 if (UNMARSHALLING(ps)) {
595 if (ps->bigendian_data)
596 *status = W_ERROR(RIVAL(q,0));
598 *status = W_ERROR(IVAL(q,0));
600 if (ps->bigendian_data)
601 RSIVAL(q,0,W_ERROR_V(*status));
603 SIVAL(q,0,W_ERROR_V(*status));
606 DEBUG(5,("%s%04x %s: %s\n", tab_depth(depth), ps->data_offset, name,
607 werror_str(*status)));
609 ps->data_offset += sizeof(uint32);
615 /******************************************************************
616 Stream an array of uint8s. Length is number of uint8s.
617 ********************************************************************/
619 BOOL prs_uint8s(BOOL charmode, char *name, prs_struct *ps, int depth, uint8 *data8s, int len)
622 char *q = prs_mem_get(ps, len);
626 if (UNMARSHALLING(ps)) {
627 for (i = 0; i < len; i++)
628 data8s[i] = CVAL(q,i);
630 for (i = 0; i < len; i++)
631 SCVAL(q, i, data8s[i]);
634 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset ,name));
636 print_asc(5, (unsigned char*)data8s, len);
638 for (i = 0; i < len; i++)
639 DEBUG(5,("%02x ", data8s[i]));
643 ps->data_offset += len;
648 /******************************************************************
649 Stream an array of uint16s. Length is number of uint16s.
650 ********************************************************************/
652 BOOL prs_uint16s(BOOL charmode, char *name, prs_struct *ps, int depth, uint16 *data16s, int len)
655 char *q = prs_mem_get(ps, len * sizeof(uint16));
659 if (UNMARSHALLING(ps)) {
660 if (ps->bigendian_data) {
661 for (i = 0; i < len; i++)
662 data16s[i] = RSVAL(q, 2*i);
664 for (i = 0; i < len; i++)
665 data16s[i] = SVAL(q, 2*i);
668 if (ps->bigendian_data) {
669 for (i = 0; i < len; i++)
670 RSSVAL(q, 2*i, data16s[i]);
672 for (i = 0; i < len; i++)
673 SSVAL(q, 2*i, data16s[i]);
677 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
679 print_asc(5, (unsigned char*)data16s, 2*len);
681 for (i = 0; i < len; i++)
682 DEBUG(5,("%04x ", data16s[i]));
686 ps->data_offset += (len * sizeof(uint16));
691 /******************************************************************
692 Start using a function for streaming unicode chars. If unmarshalling,
693 output must be little-endian, if marshalling, input must be little-endian.
694 ********************************************************************/
696 static void dbg_rw_punival(BOOL charmode, char *name, int depth, prs_struct *ps,
697 char *in_buf, char *out_buf, int len)
701 if (UNMARSHALLING(ps)) {
702 if (ps->bigendian_data) {
703 for (i = 0; i < len; i++)
704 SSVAL(out_buf,2*i,RSVAL(in_buf, 2*i));
706 for (i = 0; i < len; i++)
707 SSVAL(out_buf, 2*i, SVAL(in_buf, 2*i));
710 if (ps->bigendian_data) {
711 for (i = 0; i < len; i++)
712 RSSVAL(in_buf, 2*i, SVAL(out_buf,2*i));
714 for (i = 0; i < len; i++)
715 SSVAL(in_buf, 2*i, SVAL(out_buf,2*i));
719 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
721 print_asc(5, (unsigned char*)out_buf, 2*len);
723 for (i = 0; i < len; i++)
724 DEBUG(5,("%04x ", out_buf[i]));
729 /******************************************************************
730 Stream a unistr. Always little endian.
731 ********************************************************************/
733 BOOL prs_uint16uni(BOOL charmode, char *name, prs_struct *ps, int depth, uint16 *data16s, int len)
735 char *q = prs_mem_get(ps, len * sizeof(uint16));
739 dbg_rw_punival(charmode, name, depth, ps, q, (char *)data16s, len);
740 ps->data_offset += (len * sizeof(uint16));
745 /******************************************************************
746 Stream an array of uint32s. Length is number of uint32s.
747 ********************************************************************/
749 BOOL prs_uint32s(BOOL charmode, char *name, prs_struct *ps, int depth, uint32 *data32s, int len)
752 char *q = prs_mem_get(ps, len * sizeof(uint32));
756 if (UNMARSHALLING(ps)) {
757 if (ps->bigendian_data) {
758 for (i = 0; i < len; i++)
759 data32s[i] = RIVAL(q, 4*i);
761 for (i = 0; i < len; i++)
762 data32s[i] = IVAL(q, 4*i);
765 if (ps->bigendian_data) {
766 for (i = 0; i < len; i++)
767 RSIVAL(q, 4*i, data32s[i]);
769 for (i = 0; i < len; i++)
770 SIVAL(q, 4*i, data32s[i]);
774 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
776 print_asc(5, (unsigned char*)data32s, 4*len);
778 for (i = 0; i < len; i++)
779 DEBUG(5,("%08x ", data32s[i]));
783 ps->data_offset += (len * sizeof(uint32));
788 /******************************************************************
789 Stream an array of unicode string, length/buffer specified separately,
790 in uint16 chars. The unicode string is already in little-endian format.
791 ********************************************************************/
793 BOOL prs_buffer5(BOOL charmode, char *name, prs_struct *ps, int depth, BUFFER5 *str)
796 char *q = prs_mem_get(ps, str->buf_len * sizeof(uint16));
800 if (UNMARSHALLING(ps)) {
801 str->buffer = (uint16 *)prs_alloc_mem(ps,str->buf_len * sizeof(uint16));
802 if (str->buffer == NULL)
806 /* If the string is empty, we don't have anything to stream */
810 p = (char *)str->buffer;
812 dbg_rw_punival(charmode, name, depth, ps, q, p, str->buf_len);
814 ps->data_offset += (str->buf_len * sizeof(uint16));
819 /******************************************************************
820 Stream a "not" unicode string, length/buffer specified separately,
821 in byte chars. String is in little-endian format.
822 ********************************************************************/
824 BOOL prs_buffer2(BOOL charmode, char *name, prs_struct *ps, int depth, BUFFER2 *str)
827 char *q = prs_mem_get(ps, str->buf_len);
831 if (UNMARSHALLING(ps)) {
832 str->buffer = (uint16 *)prs_alloc_mem(ps,str->buf_len);
833 if (str->buffer == NULL)
837 p = (char *)str->buffer;
839 dbg_rw_punival(charmode, name, depth, ps, q, p, str->buf_len/2);
840 ps->data_offset += str->buf_len;
845 /******************************************************************
846 Stream a string, length/buffer specified separately,
848 ********************************************************************/
850 BOOL prs_string2(BOOL charmode, char *name, prs_struct *ps, int depth, STRING2 *str)
853 char *q = prs_mem_get(ps, str->str_str_len);
857 if (UNMARSHALLING(ps)) {
858 str->buffer = (unsigned char *)prs_alloc_mem(ps,str->str_str_len);
859 if (str->buffer == NULL)
863 if (UNMARSHALLING(ps)) {
864 for (i = 0; i < str->str_str_len; i++)
865 str->buffer[i] = CVAL(q,i);
867 for (i = 0; i < str->str_str_len; i++)
868 SCVAL(q, i, str->buffer[i]);
871 DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
873 print_asc(5, (unsigned char*)str->buffer, str->str_str_len);
875 for (i = 0; i < str->str_str_len; i++)
876 DEBUG(5,("%02x ", str->buffer[i]));
880 ps->data_offset += str->str_str_len;
885 /******************************************************************
886 Stream a unicode string, length/buffer specified separately,
887 in uint16 chars. The unicode string is already in little-endian format.
888 ********************************************************************/
890 BOOL prs_unistr2(BOOL charmode, char *name, prs_struct *ps, int depth, UNISTR2 *str)
893 char *q = prs_mem_get(ps, str->uni_str_len * sizeof(uint16));
897 /* If the string is empty, we don't have anything to stream */
898 if (str->uni_str_len==0)
901 if (UNMARSHALLING(ps)) {
902 str->buffer = (uint16 *)prs_alloc_mem(ps,str->uni_max_len * sizeof(uint16));
903 if (str->buffer == NULL)
907 p = (char *)str->buffer;
909 dbg_rw_punival(charmode, name, depth, ps, q, p, str->uni_str_len);
911 ps->data_offset += (str->uni_str_len * sizeof(uint16));
916 /******************************************************************
917 Stream a unicode string, length/buffer specified separately,
918 in uint16 chars. The unicode string is already in little-endian format.
919 ********************************************************************/
921 BOOL prs_unistr3(BOOL charmode, char *name, UNISTR3 *str, prs_struct *ps, int depth)
924 char *q = prs_mem_get(ps, str->uni_str_len * sizeof(uint16));
928 if (UNMARSHALLING(ps)) {
929 str->str.buffer = (uint16 *)prs_alloc_mem(ps,str->uni_str_len * sizeof(uint16));
930 if (str->str.buffer == NULL)
934 p = (char *)str->str.buffer;
936 dbg_rw_punival(charmode, name, depth, ps, q, p, str->uni_str_len);
937 ps->data_offset += (str->uni_str_len * sizeof(uint16));
942 /*******************************************************************
943 Stream a unicode null-terminated string. As the string is already
944 in little-endian format then do it as a stream of bytes.
945 ********************************************************************/
947 BOOL prs_unistr(char *name, prs_struct *ps, int depth, UNISTR *str)
950 unsigned char *p = (unsigned char *)str->buffer;
956 if (MARSHALLING(ps)) {
958 for(len = 0; str->buffer[len] != 0; len++)
961 q = prs_mem_get(ps, (len+1)*2);
967 for(len = 0; str->buffer[len] != 0; len++)
969 if(ps->bigendian_data)
971 /* swap bytes - p is little endian, q is big endian. */
987 * even if the string is 'empty' (only an \0 char)
988 * at this point the leading \0 hasn't been parsed.
998 dump_data(5+depth, (char *)start, len * 2);
1000 else { /* unmarshalling */
1002 uint32 alloc_len = 0;
1003 q = prs_data_p(ps) + prs_offset(ps);
1006 * Work out how much space we need and talloc it.
1008 max_len = (ps->buffer_size - ps->data_offset)/sizeof(uint16);
1010 /* the test of the value of *ptr helps to catch the circumstance
1011 where we have an emtpty (non-existent) string in the buffer */
1012 for ( ptr = (uint16 *)q; *ptr && (alloc_len <= max_len); alloc_len++)
1016 /* should we allocate anything at all? */
1017 str->buffer = (uint16 *)prs_alloc_mem(ps,alloc_len * sizeof(uint16));
1018 if ((str->buffer == NULL) && (alloc_len > 0))
1021 p = (unsigned char *)str->buffer;
1024 /* the (len < alloc_len) test is to prevent us from overwriting
1025 memory that is not ours...if we get that far, we have a non-null
1026 terminated string in the buffer and have messed up somewhere */
1027 while ((len < alloc_len) && (*(uint16 *)q != 0))
1029 if(ps->bigendian_data)
1031 /* swap bytes - q is big endian, p is little endian. */
1032 p[0] = (unsigned char)q[1];
1033 p[1] = (unsigned char)q[0];
1038 p[0] = (unsigned char)q[0];
1039 p[1] = (unsigned char)q[1];
1046 if (len < alloc_len)
1048 /* NULL terminate the UNISTR */
1049 str->buffer[len++] = '\0';
1053 /* set the offset in the prs_struct; 'len' points to the
1054 terminiating NULL in the UNISTR so we need to go one more
1056 ps->data_offset += (len)*2;
1062 /*******************************************************************
1063 Stream a null-terminated string. len is strlen, and therefore does
1064 not include the null-termination character.
1065 ********************************************************************/
1067 BOOL prs_string(char *name, prs_struct *ps, int depth, char *str, int len, int max_buf_size)
1072 len = MIN(len, (max_buf_size-1));
1074 q = prs_mem_get(ps, len+1);
1078 for(i = 0; i < len; i++) {
1079 if (UNMARSHALLING(ps))
1085 /* The terminating null. */
1088 if (MARSHALLING(ps)) {
1092 ps->data_offset += len+1;
1094 dump_data(5+depth, q, len);
1099 /*******************************************************************
1100 prs_uint16 wrapper. Call this and it sets up a pointer to where the
1101 uint16 should be stored, or gets the size if reading.
1102 ********************************************************************/
1104 BOOL prs_uint16_pre(char *name, prs_struct *ps, int depth, uint16 *data16, uint32 *offset)
1106 *offset = ps->data_offset;
1107 if (UNMARSHALLING(ps)) {
1109 return prs_uint16(name, ps, depth, data16);
1111 char *q = prs_mem_get(ps, sizeof(uint16));
1114 ps->data_offset += sizeof(uint16);
1119 /*******************************************************************
1120 prs_uint16 wrapper. call this and it retrospectively stores the size.
1121 does nothing on reading, as that is already handled by ...._pre()
1122 ********************************************************************/
1124 BOOL prs_uint16_post(char *name, prs_struct *ps, int depth, uint16 *data16,
1125 uint32 ptr_uint16, uint32 start_offset)
1127 if (MARSHALLING(ps)) {
1129 * Writing - temporarily move the offset pointer.
1131 uint16 data_size = ps->data_offset - start_offset;
1132 uint32 old_offset = ps->data_offset;
1134 ps->data_offset = ptr_uint16;
1135 if(!prs_uint16(name, ps, depth, &data_size)) {
1136 ps->data_offset = old_offset;
1139 ps->data_offset = old_offset;
1141 ps->data_offset = start_offset + (uint32)(*data16);
1146 /*******************************************************************
1147 prs_uint32 wrapper. Call this and it sets up a pointer to where the
1148 uint32 should be stored, or gets the size if reading.
1149 ********************************************************************/
1151 BOOL prs_uint32_pre(char *name, prs_struct *ps, int depth, uint32 *data32, uint32 *offset)
1153 *offset = ps->data_offset;
1154 if (UNMARSHALLING(ps) && (data32 != NULL)) {
1156 return prs_uint32(name, ps, depth, data32);
1158 ps->data_offset += sizeof(uint32);
1163 /*******************************************************************
1164 prs_uint32 wrapper. call this and it retrospectively stores the size.
1165 does nothing on reading, as that is already handled by ...._pre()
1166 ********************************************************************/
1168 BOOL prs_uint32_post(char *name, prs_struct *ps, int depth, uint32 *data32,
1169 uint32 ptr_uint32, uint32 data_size)
1171 if (MARSHALLING(ps)) {
1173 * Writing - temporarily move the offset pointer.
1175 uint32 old_offset = ps->data_offset;
1176 ps->data_offset = ptr_uint32;
1177 if(!prs_uint32(name, ps, depth, &data_size)) {
1178 ps->data_offset = old_offset;
1181 ps->data_offset = old_offset;
1186 /* useful function to store a structure in rpc wire format */
1187 int tdb_prs_store(TDB_CONTEXT *tdb, char *keystr, prs_struct *ps)
1189 TDB_DATA kbuf, dbuf;
1191 kbuf.dsize = strlen(keystr)+1;
1192 dbuf.dptr = prs_data_p(ps);
1193 dbuf.dsize = prs_offset(ps);
1194 return tdb_store(tdb, kbuf, dbuf, TDB_REPLACE);
1197 /* useful function to fetch a structure into rpc wire format */
1198 int tdb_prs_fetch(TDB_CONTEXT *tdb, char *keystr, prs_struct *ps, TALLOC_CTX *mem_ctx)
1200 TDB_DATA kbuf, dbuf;
1202 kbuf.dsize = strlen(keystr)+1;
1204 dbuf = tdb_fetch(tdb, kbuf);
1205 if (!dbuf.dptr) return -1;
1208 prs_init(ps, 0, mem_ctx, UNMARSHALL);
1209 prs_give_memory(ps, dbuf.dptr, dbuf.dsize, True);