source: branches/samba-3.5.x/source3/librpc/ndr/ndr_string.c

Last change on this file was 596, checked in by Herwig Bauernfeind, 14 years ago

Samba 3.5: Update trunk to 3.5.8
File size: 19.4 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 routines for marshalling/unmarshalling string types
5
6 Copyright (C) Andrew Tridgell 2003
7
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 3 of the License, or
11 (at your option) any later version.
12
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.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23#include "librpc/ndr/libndr.h"
24
25/**
26 pull a general string from the wire
27*/
28_PUBLIC_ enum ndr_err_code ndr_pull_string(struct ndr_pull *ndr, int ndr_flags, const char **s)
29{
30 char *as=NULL;
31 uint32_t len1, ofs, len2;
32 uint16_t len3;
33 size_t converted_size;
34 int chset = CH_UTF16;
35 unsigned byte_mul = 2;
36 unsigned flags = ndr->flags;
37 unsigned c_len_term = 0;
38
39 if (!(ndr_flags & NDR_SCALARS)) {
40 return NDR_ERR_SUCCESS;
41 }
42
43 if (NDR_BE(ndr)) {
44 chset = CH_UTF16BE;
45 }
46
47 if (flags & LIBNDR_FLAG_STR_ASCII) {
48 chset = CH_DOS;
49 byte_mul = 1;
50 flags &= ~LIBNDR_FLAG_STR_ASCII;
51 }
52
53 if (flags & LIBNDR_FLAG_STR_UTF8) {
54 chset = CH_UTF8;
55 byte_mul = 1;
56 flags &= ~LIBNDR_FLAG_STR_UTF8;
57 }
58
59 flags &= ~LIBNDR_FLAG_STR_CONFORMANT;
60 if (flags & LIBNDR_FLAG_STR_CHARLEN) {
61 c_len_term = 1;
62 flags &= ~LIBNDR_FLAG_STR_CHARLEN;
63 }
64
65 switch (flags & LIBNDR_STRING_FLAGS) {
66 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4:
67 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM:
68 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
69 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs));
70 if (ofs != 0) {
71 return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n",
72 ndr->flags & LIBNDR_STRING_FLAGS);
73 }
74 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len2));
75 if (len2 > len1) {
76 return ndr_pull_error(ndr, NDR_ERR_STRING,
77 "Bad string lengths len1=%u ofs=%u len2=%u\n",
78 len1, ofs, len2);
79 }
80 NDR_PULL_NEED_BYTES(ndr, (len2 + c_len_term)*byte_mul);
81 if (len2 == 0) {
82 as = talloc_strdup(ndr->current_mem_ctx, "");
83 } else {
84 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
85 CH_UNIX,
86 ndr->data+ndr->offset,
87 (len2 + c_len_term)*byte_mul,
88 (void **)(void *)&as,
89 &converted_size, false))
90 {
91 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
92 "Bad character conversion");
93 }
94 }
95 NDR_CHECK(ndr_pull_advance(ndr, (len2 + c_len_term)*byte_mul));
96
97 if (len1 != len2) {
98 DEBUG(6,("len1[%u] != len2[%u] '%s'\n", len1, len2, as));
99 }
100
101 /* this is a way of detecting if a string is sent with the wrong
102 termination */
103 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
104 if (strlen(as) < (len2 + c_len_term)) {
105 DEBUG(6,("short string '%s'\n", as));
106 }
107 } else {
108 if (strlen(as) == (len2 + c_len_term)) {
109 DEBUG(6,("long string '%s'\n", as));
110 }
111 }
112 *s = as;
113 break;
114
115 case LIBNDR_FLAG_STR_SIZE4:
116 case LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM:
117 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
118 NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul);
119 if (len1 == 0) {
120 as = talloc_strdup(ndr->current_mem_ctx, "");
121 } else {
122 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
123 CH_UNIX,
124 ndr->data+ndr->offset,
125 (len1 + c_len_term)*byte_mul,
126 (void **)(void *)&as,
127 &converted_size, false))
128 {
129 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
130 "Bad character conversion");
131 }
132 }
133 NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul));
134
135 /* this is a way of detecting if a string is sent with the wrong
136 termination */
137 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
138 if (strlen(as) < (len1 + c_len_term)) {
139 DEBUG(6,("short string '%s'\n", as));
140 }
141 } else {
142 if (strlen(as) == (len1 + c_len_term)) {
143 DEBUG(6,("long string '%s'\n", as));
144 }
145 }
146 *s = as;
147 break;
148
149 case LIBNDR_FLAG_STR_LEN4:
150 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_NOTERM:
151 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs));
152 if (ofs != 0) {
153 return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n",
154 ndr->flags & LIBNDR_STRING_FLAGS);
155 }
156 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
157 NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul);
158 if (len1 == 0) {
159 as = talloc_strdup(ndr->current_mem_ctx, "");
160 } else {
161 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
162 CH_UNIX,
163 ndr->data+ndr->offset,
164 (len1 + c_len_term)*byte_mul,
165 (void **)(void *)&as,
166 &converted_size, false))
167 {
168 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
169 "Bad character conversion");
170 }
171 }
172 NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul));
173
174 /* this is a way of detecting if a string is sent with the wrong
175 termination */
176 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
177 if (strlen(as) < (len1 + c_len_term)) {
178 DEBUG(6,("short string '%s'\n", as));
179 }
180 } else {
181 if (strlen(as) == (len1 + c_len_term)) {
182 DEBUG(6,("long string '%s'\n", as));
183 }
184 }
185 *s = as;
186 break;
187
188
189 case LIBNDR_FLAG_STR_SIZE2:
190 case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM:
191 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3));
192 NDR_PULL_NEED_BYTES(ndr, (len3 + c_len_term)*byte_mul);
193 if (len3 == 0) {
194 as = talloc_strdup(ndr->current_mem_ctx, "");
195 } else {
196 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
197 CH_UNIX,
198 ndr->data+ndr->offset,
199 (len3 + c_len_term)*byte_mul,
200 (void **)(void *)&as,
201 &converted_size, false))
202 {
203 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
204 "Bad character conversion");
205 }
206 }
207 NDR_CHECK(ndr_pull_advance(ndr, (len3 + c_len_term)*byte_mul));
208
209 /* this is a way of detecting if a string is sent with the wrong
210 termination */
211 if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
212 if (strlen(as) < (len3 + c_len_term)) {
213 DEBUG(6,("short string '%s'\n", as));
214 }
215 } else {
216 if (strlen(as) == (len3 + c_len_term)) {
217 DEBUG(6,("long string '%s'\n", as));
218 }
219 }
220 *s = as;
221 break;
222
223 case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_STR_BYTESIZE:
224 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3));
225 NDR_PULL_NEED_BYTES(ndr, len3);
226 if (len3 == 0) {
227 as = talloc_strdup(ndr->current_mem_ctx, "");
228 } else {
229 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
230 CH_UNIX,
231 ndr->data+ndr->offset, len3,
232 (void **)(void *)&as,
233 &converted_size, false))
234 {
235 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
236 "Bad character conversion");
237 }
238 }
239 NDR_CHECK(ndr_pull_advance(ndr, len3));
240 *s = as;
241 break;
242
243 case LIBNDR_FLAG_STR_NULLTERM:
244 if (byte_mul == 1) {
245 len1 = ascii_len_n((const char *)(ndr->data+ndr->offset), ndr->data_size - ndr->offset);
246 } else {
247 len1 = utf16_len_n(ndr->data+ndr->offset, ndr->data_size - ndr->offset);
248 }
249 if (!convert_string_talloc(ndr->current_mem_ctx, chset, CH_UNIX,
250 ndr->data+ndr->offset, len1,
251 (void **)(void *)&as,
252 &converted_size, false))
253 {
254 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
255 "Bad character conversion");
256 }
257 NDR_CHECK(ndr_pull_advance(ndr, len1));
258 *s = as;
259 break;
260
261 case LIBNDR_FLAG_STR_NOTERM:
262 if (!(ndr->flags & LIBNDR_FLAG_REMAINING)) {
263 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x (missing NDR_REMAINING)\n",
264 ndr->flags & LIBNDR_STRING_FLAGS);
265 }
266
267 len1 = ndr->data_size - ndr->offset;
268
269 NDR_PULL_NEED_BYTES(ndr, len1);
270 if (len1 == 0) {
271 as = talloc_strdup(ndr->current_mem_ctx, "");
272 } else {
273 if (!convert_string_talloc(ndr->current_mem_ctx, chset,
274 CH_UNIX,
275 ndr->data+ndr->offset, len1,
276 (void **)(void *)&as,
277 &converted_size, false))
278 {
279 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
280 "Bad character conversion");
281 }
282 }
283 NDR_CHECK(ndr_pull_advance(ndr, len1));
284
285 *s = as;
286 break;
287
288 default:
289 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
290 ndr->flags & LIBNDR_STRING_FLAGS);
291 }
292
293 return NDR_ERR_SUCCESS;
294}
295
296
297/**
298 push a general string onto the wire
299*/
300_PUBLIC_ enum ndr_err_code ndr_push_string(struct ndr_push *ndr, int ndr_flags, const char *s)
301{
302 ssize_t s_len, c_len;
303 size_t d_len;
304 int chset = CH_UTF16;
305 unsigned flags = ndr->flags;
306 unsigned byte_mul = 2;
307 uint8_t *dest = NULL;
308
309 if (!(ndr_flags & NDR_SCALARS)) {
310 return NDR_ERR_SUCCESS;
311 }
312
313 if (NDR_BE(ndr)) {
314 chset = CH_UTF16BE;
315 }
316
317 s_len = s?strlen(s):0;
318
319 if (flags & LIBNDR_FLAG_STR_ASCII) {
320 chset = CH_DOS;
321 byte_mul = 1;
322 flags &= ~LIBNDR_FLAG_STR_ASCII;
323 }
324
325 if (flags & LIBNDR_FLAG_STR_UTF8) {
326 chset = CH_UTF8;
327 byte_mul = 1;
328 flags &= ~LIBNDR_FLAG_STR_UTF8;
329 }
330
331 flags &= ~LIBNDR_FLAG_STR_CONFORMANT;
332
333 if (!(flags & LIBNDR_FLAG_STR_NOTERM)) {
334 s_len++;
335 }
336 if (!convert_string_talloc(ndr, CH_UNIX, chset, s, s_len,
337 (void **)(void *)&dest, &d_len, false))
338 {
339 return ndr_push_error(ndr, NDR_ERR_CHARCNV,
340 "Bad character conversion");
341 }
342
343 if (flags & LIBNDR_FLAG_STR_BYTESIZE) {
344 c_len = d_len;
345 flags &= ~LIBNDR_FLAG_STR_BYTESIZE;
346 } else if (flags & LIBNDR_FLAG_STR_CHARLEN) {
347 c_len = (d_len / byte_mul)-1;
348 flags &= ~LIBNDR_FLAG_STR_CHARLEN;
349 } else {
350 c_len = d_len / byte_mul;
351 }
352
353 switch ((flags & LIBNDR_STRING_FLAGS) & ~LIBNDR_FLAG_STR_NOTERM) {
354 case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4:
355 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
356 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
357 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
358 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
359 break;
360
361 case LIBNDR_FLAG_STR_LEN4:
362 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
363 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
364 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
365 break;
366
367 case LIBNDR_FLAG_STR_SIZE4:
368 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
369 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
370 break;
371
372 case LIBNDR_FLAG_STR_SIZE2:
373 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, c_len));
374 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
375 break;
376
377 case LIBNDR_FLAG_STR_NULLTERM:
378 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
379 break;
380
381 default:
382 if (ndr->flags & LIBNDR_FLAG_REMAINING) {
383 NDR_CHECK(ndr_push_bytes(ndr, dest, d_len));
384 break;
385 }
386
387 return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
388 ndr->flags & LIBNDR_STRING_FLAGS);
389 }
390
391 talloc_free(dest);
392
393 return NDR_ERR_SUCCESS;
394}
395
396/**
397 push a general string onto the wire
398*/
399_PUBLIC_ size_t ndr_string_array_size(struct ndr_push *ndr, const char *s)
400{
401 size_t c_len;
402 unsigned flags = ndr->flags;
403 unsigned byte_mul = 2;
404 unsigned c_len_term = 1;
405
406 c_len = s?strlen_m(s):0;
407
408 if (flags & (LIBNDR_FLAG_STR_ASCII|LIBNDR_FLAG_STR_UTF8)) {
409 byte_mul = 1;
410 }
411
412 if (flags & LIBNDR_FLAG_STR_NOTERM) {
413 c_len_term = 0;
414 }
415
416 c_len = c_len + c_len_term;
417
418 if (flags & LIBNDR_FLAG_STR_BYTESIZE) {
419 c_len = c_len * byte_mul;
420 }
421
422 return c_len;
423}
424
425_PUBLIC_ void ndr_print_string(struct ndr_print *ndr, const char *name, const char *s)
426{
427 if (s) {
428 ndr->print(ndr, "%-25s: '%s'", name, s);
429 } else {
430 ndr->print(ndr, "%-25s: NULL", name);
431 }
432}
433
434_PUBLIC_ uint32_t ndr_size_string(int ret, const char * const* string, int flags)
435{
436 /* FIXME: Is this correct for all strings ? */
437 if(!(*string)) return ret;
438 return ret+strlen(*string)+1;
439}
440
441/**
442 pull a general string array from the wire
443*/
444_PUBLIC_ enum ndr_err_code ndr_pull_string_array(struct ndr_pull *ndr, int ndr_flags, const char ***_a)
445{
446 const char **a = NULL;
447 uint32_t count;
448 unsigned flags = ndr->flags;
449 unsigned saved_flags = ndr->flags;
450
451 if (!(ndr_flags & NDR_SCALARS)) {
452 return NDR_ERR_SUCCESS;
453 }
454
455 switch (flags & LIBNDR_STRING_FLAGS) {
456 case LIBNDR_FLAG_STR_NULLTERM:
457 /*
458 * here the strings are null terminated
459 * but also the array is null terminated
460 */
461 for (count = 0;; count++) {
462 TALLOC_CTX *tmp_ctx;
463 const char *s = NULL;
464 a = talloc_realloc(ndr->current_mem_ctx, a, const char *, count + 2);
465 NDR_ERR_HAVE_NO_MEMORY(a);
466 a[count] = NULL;
467 a[count+1] = NULL;
468
469 tmp_ctx = ndr->current_mem_ctx;
470 ndr->current_mem_ctx = a;
471 NDR_CHECK(ndr_pull_string(ndr, ndr_flags, &s));
472 ndr->current_mem_ctx = tmp_ctx;
473 if (strcmp("", s)==0) {
474 a[count] = NULL;
475 break;
476 } else {
477 a[count] = s;
478 }
479 }
480
481 *_a =a;
482 break;
483
484 case LIBNDR_FLAG_STR_NOTERM:
485 if (!(ndr->flags & LIBNDR_FLAG_REMAINING)) {
486 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x (missing NDR_REMAINING)\n",
487 ndr->flags & LIBNDR_STRING_FLAGS);
488 }
489 /*
490 * here the strings are not null terminated
491 * but serarated by a null terminator
492 *
493 * which means the same as:
494 * very string is null terminated exept the last
495 * string is terminated by the end of the buffer
496 *
497 * as LIBNDR_FLAG_STR_NULLTERM also end at the end
498 * of the buffer, we can pull each string with this flag
499 */
500 ndr->flags &= ~(LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_REMAINING);
501 ndr->flags |= LIBNDR_FLAG_STR_NULLTERM;
502
503 for (count = 0; ((ndr->data_size - ndr->offset) > 0); count++) {
504 TALLOC_CTX *tmp_ctx;
505 const char *s = NULL;
506 a = talloc_realloc(ndr->current_mem_ctx, a, const char *, count + 2);
507 NDR_ERR_HAVE_NO_MEMORY(a);
508 a[count] = NULL;
509 a[count+1] = NULL;
510
511 tmp_ctx = ndr->current_mem_ctx;
512 ndr->current_mem_ctx = a;
513 NDR_CHECK(ndr_pull_string(ndr, ndr_flags, &s));
514 ndr->current_mem_ctx = tmp_ctx;
515 a[count] = s;
516 }
517
518 *_a =a;
519 break;
520
521 default:
522 return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
523 ndr->flags & LIBNDR_STRING_FLAGS);
524 }
525
526 ndr->flags = saved_flags;
527 return NDR_ERR_SUCCESS;
528}
529
530/**
531 push a general string array onto the wire
532*/
533_PUBLIC_ enum ndr_err_code ndr_push_string_array(struct ndr_push *ndr, int ndr_flags, const char **a)
534{
535 uint32_t count;
536 unsigned flags = ndr->flags;
537 unsigned saved_flags = ndr->flags;
538
539 if (!(ndr_flags & NDR_SCALARS)) {
540 return NDR_ERR_SUCCESS;
541 }
542
543 switch (flags & LIBNDR_STRING_FLAGS) {
544 case LIBNDR_FLAG_STR_NULLTERM:
545 for (count = 0; a && a[count]; count++) {
546 NDR_CHECK(ndr_push_string(ndr, ndr_flags, a[count]));
547 }
548
549 NDR_CHECK(ndr_push_string(ndr, ndr_flags, ""));
550 break;
551
552 case LIBNDR_FLAG_STR_NOTERM:
553 if (!(ndr->flags & LIBNDR_FLAG_REMAINING)) {
554 return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x (missing NDR_REMAINING)\n",
555 ndr->flags & LIBNDR_STRING_FLAGS);
556 }
557
558 for (count = 0; a && a[count]; count++) {
559 if (count > 0) {
560 ndr->flags &= ~(LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_REMAINING);
561 ndr->flags |= LIBNDR_FLAG_STR_NULLTERM;
562 NDR_CHECK(ndr_push_string(ndr, ndr_flags, ""));
563 ndr->flags = saved_flags;
564 }
565 NDR_CHECK(ndr_push_string(ndr, ndr_flags, a[count]));
566 }
567
568 break;
569
570 default:
571 return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
572 ndr->flags & LIBNDR_STRING_FLAGS);
573 }
574
575 ndr->flags = saved_flags;
576 return NDR_ERR_SUCCESS;
577}
578
579_PUBLIC_ void ndr_print_string_array(struct ndr_print *ndr, const char *name, const char **a)
580{
581 uint32_t count;
582 uint32_t i;
583
584 for (count = 0; a && a[count]; count++) {}
585
586 ndr->print(ndr, "%s: ARRAY(%d)", name, count);
587 ndr->depth++;
588 for (i=0;i<count;i++) {
589 char *idx=NULL;
590 if (asprintf(&idx, "[%d]", i) != -1) {
591 ndr_print_string(ndr, idx, a[i]);
592 free(idx);
593 }
594 }
595 ndr->depth--;
596}
597
598_PUBLIC_ size_t ndr_size_string_array(const char **a, uint32_t count, int flags)
599{
600 uint32_t i;
601 size_t size = 0;
602
603 switch (flags & LIBNDR_STRING_FLAGS) {
604 case LIBNDR_FLAG_STR_NULLTERM:
605 for (i = 0; i < count; i++) {
606 size += strlen_m_term(a[i]);
607 }
608 break;
609 case LIBNDR_FLAG_STR_NOTERM:
610 for (i = 0; i < count; i++) {
611 size += strlen_m(a[i]);
612 }
613 break;
614 default:
615 return 0;
616 }
617
618 return size;
619}
620
621/**
622 * Return number of elements in a string including the last (zeroed) element
623 */
624_PUBLIC_ uint32_t ndr_string_length(const void *_var, uint32_t element_size)
625{
626 uint32_t i;
627 uint8_t zero[4] = {0,0,0,0};
628 const char *var = (const char *)_var;
629
630 for (i = 0; memcmp(var+i*element_size,zero,element_size) != 0; i++);
631
632 return i+1;
633}
634
635_PUBLIC_ enum ndr_err_code ndr_check_string_terminator(struct ndr_pull *ndr, uint32_t count, uint32_t element_size)
636{
637 uint32_t i;
638 uint32_t save_offset;
639
640 save_offset = ndr->offset;
641 ndr_pull_advance(ndr, (count - 1) * element_size);
642 NDR_PULL_NEED_BYTES(ndr, element_size);
643
644 for (i = 0; i < element_size; i++) {
645 if (ndr->data[ndr->offset+i] != 0) {
646 ndr->offset = save_offset;
647
648 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, "String terminator not present or outside string boundaries");
649 }
650 }
651
652 ndr->offset = save_offset;
653
654 return NDR_ERR_SUCCESS;
655}
656
657_PUBLIC_ enum ndr_err_code ndr_pull_charset(struct ndr_pull *ndr, int ndr_flags, const char **var, uint32_t length, uint8_t byte_mul, charset_t chset)
658{
659 size_t converted_size;
660
661 if (length == 0) {
662 *var = talloc_strdup(ndr->current_mem_ctx, "");
663 return NDR_ERR_SUCCESS;
664 }
665
666 if (NDR_BE(ndr) && chset == CH_UTF16) {
667 chset = CH_UTF16BE;
668 }
669
670 NDR_PULL_NEED_BYTES(ndr, length*byte_mul);
671
672 if (!convert_string_talloc(ndr->current_mem_ctx, chset, CH_UNIX,
673 ndr->data+ndr->offset, length*byte_mul,
674 discard_const_p(void *, var),
675 &converted_size, false))
676 {
677 return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
678 "Bad character conversion");
679 }
680 NDR_CHECK(ndr_pull_advance(ndr, length*byte_mul));
681
682 return NDR_ERR_SUCCESS;
683}
684
685_PUBLIC_ enum ndr_err_code ndr_push_charset(struct ndr_push *ndr, int ndr_flags, const char *var, uint32_t length, uint8_t byte_mul, charset_t chset)
686{
687 ssize_t ret, required;
688
689 if (NDR_BE(ndr) && chset == CH_UTF16) {
690 chset = CH_UTF16BE;
691 }
692
693 required = byte_mul * length;
694
695 NDR_PUSH_NEED_BYTES(ndr, required);
696 ret = convert_string(CH_UNIX, chset,
697 var, strlen(var),
698 ndr->data+ndr->offset, required, false);
699 if (ret == -1) {
700 return ndr_push_error(ndr, NDR_ERR_CHARCNV,
701 "Bad character conversion");
702 }
703
704 /* Make sure the remaining part of the string is filled with zeroes */
705 if (ret < required) {
706 memset(ndr->data+ndr->offset+ret, 0, required-ret);
707 }
708
709 ndr->offset += required;
710
711 return NDR_ERR_SUCCESS;
712}
713
714/* Return number of elements in a string in the specified charset */
715_PUBLIC_ uint32_t ndr_charset_length(const void *var, charset_t chset)
716{
717 switch (chset) {
718 /* case CH_UTF16: this has the same value as CH_UTF16LE */
719 case CH_UTF16LE:
720 case CH_UTF16BE:
721 case CH_UTF16MUNGED:
722 case CH_UTF8:
723 return strlen_m_ext_term((const char *)var, chset);
724 case CH_DISPLAY:
725 case CH_DOS:
726 case CH_UNIX:
727 return strlen((const char *)var)+1;
728 }
729
730 /* Fallback, this should never happen */
731 return strlen((const char *)var)+1;
732}
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