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build: Check for syscall headers
[Samba/gebeck_regimport.git] / librpc / ndr / ndr.c
blob90be787526f293456e1c36ebc36396a1d93b396f
1 /*
2 Unix SMB/CIFS implementation.
3
4 libndr interface
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 /*
23 this provides the core routines for NDR parsing functions
24
25 see http://www.opengroup.org/onlinepubs/9629399/chap14.htm for details
26 of NDR encoding rules
27 */
28
29 #include "includes.h"
30 #include "librpc/ndr/libndr.h"
31 #include "../lib/util/dlinklist.h"
32 #if _SAMBA_BUILD_ == 4
33 #include "param/param.h"
34 #endif
35
36 #define NDR_BASE_MARSHALL_SIZE 1024
37
38 /* this guid indicates NDR encoding in a protocol tower */
39 const struct ndr_syntax_id ndr_transfer_syntax = {
40 { 0x8a885d04, 0x1ceb, 0x11c9, {0x9f, 0xe8}, {0x08,0x00,0x2b,0x10,0x48,0x60} },
41 2
42 };
43
44 const struct ndr_syntax_id ndr64_transfer_syntax = {
45 { 0x71710533, 0xbeba, 0x4937, {0x83, 0x19}, {0xb5,0xdb,0xef,0x9c,0xcc,0x36} },
46 1
47 };
48
49 /*
50 work out the number of bytes needed to align on a n byte boundary
51 */
52 _PUBLIC_ size_t ndr_align_size(uint32_t offset, size_t n)
53 {
54 if ((offset & (n-1)) == 0) return 0;
55 return n - (offset & (n-1));
56 }
57
58 /*
59 initialise a ndr parse structure from a data blob
60 */
61 _PUBLIC_ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience)
62 {
63 struct ndr_pull *ndr;
64
65 ndr = talloc_zero(mem_ctx, struct ndr_pull);
66 if (!ndr) return NULL;
67 ndr->current_mem_ctx = mem_ctx;
68
69 ndr->data = blob->data;
70 ndr->data_size = blob->length;
71 ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
72
73 return ndr;
74 }
75
76 /*
77 advance by 'size' bytes
78 */
79 _PUBLIC_ enum ndr_err_code ndr_pull_advance(struct ndr_pull *ndr, uint32_t size)
80 {
81 ndr->offset += size;
82 if (ndr->offset > ndr->data_size) {
83 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
84 "ndr_pull_advance by %u failed",
85 size);
86 }
87 return NDR_ERR_SUCCESS;
88 }
89
90 /*
91 set the parse offset to 'ofs'
92 */
93 static enum ndr_err_code ndr_pull_set_offset(struct ndr_pull *ndr, uint32_t ofs)
94 {
95 ndr->offset = ofs;
96 if (ndr->offset > ndr->data_size) {
97 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
98 "ndr_pull_set_offset %u failed",
99 ofs);
100 }
101 return NDR_ERR_SUCCESS;
102 }
103
104 /* create a ndr_push structure, ready for some marshalling */
105 _PUBLIC_ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience)
106 {
107 struct ndr_push *ndr;
108
109 ndr = talloc_zero(mem_ctx, struct ndr_push);
110 if (!ndr) {
111 return NULL;
112 }
113
114 ndr->flags = 0;
115 ndr->alloc_size = NDR_BASE_MARSHALL_SIZE;
116 ndr->data = talloc_array(ndr, uint8_t, ndr->alloc_size);
117 if (!ndr->data) {
118 return NULL;
119 }
120 ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
121
122 return ndr;
123 }
124
125 /* return a DATA_BLOB structure for the current ndr_push marshalled data */
126 _PUBLIC_ DATA_BLOB ndr_push_blob(struct ndr_push *ndr)
127 {
128 DATA_BLOB blob;
129 blob = data_blob_const(ndr->data, ndr->offset);
130 if (ndr->alloc_size > ndr->offset) {
131 ndr->data[ndr->offset] = 0;
132 }
133 return blob;
134 }
135
136
137 /*
138 expand the available space in the buffer to ndr->offset + extra_size
139 */
140 _PUBLIC_ enum ndr_err_code ndr_push_expand(struct ndr_push *ndr, uint32_t extra_size)
141 {
142 uint32_t size = extra_size + ndr->offset;
143
144 if (size < ndr->offset) {
145 /* extra_size overflowed the offset */
146 return ndr_push_error(ndr, NDR_ERR_BUFSIZE, "Overflow in push_expand to %u",
147 size);
148 }
149
150 if (ndr->alloc_size > size) {
151 return NDR_ERR_SUCCESS;
152 }
153
154 ndr->alloc_size += NDR_BASE_MARSHALL_SIZE;
155 if (size+1 > ndr->alloc_size) {
156 ndr->alloc_size = size+1;
157 }
158 ndr->data = talloc_realloc(ndr, ndr->data, uint8_t, ndr->alloc_size);
159 if (!ndr->data) {
160 return ndr_push_error(ndr, NDR_ERR_ALLOC, "Failed to push_expand to %u",
161 ndr->alloc_size);
162 }
163
164 return NDR_ERR_SUCCESS;
165 }
166
167 _PUBLIC_ void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...)
168 {
169 va_list ap;
170 char *s = NULL;
171 int i, ret;
172
173 va_start(ap, format);
174 ret = vasprintf(&s, format, ap);
175 va_end(ap);
176
177 if (ret == -1) {
178 return;
179 }
180
181 for (i=0;i<ndr->depth;i++) {
182 DEBUGADD(1,(" "));
183 }
184
185 DEBUGADD(1,("%s\n", s));
186 free(s);
187 }
188
189 _PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...)
190 {
191 va_list ap;
192 int i;
193
194 for (i=0;i<ndr->depth;i++) {
195 ndr->private_data = talloc_asprintf_append_buffer(
196 (char *)ndr->private_data, " ");
197 }
198
199 va_start(ap, format);
200 ndr->private_data = talloc_vasprintf_append_buffer((char *)ndr->private_data,
201 format, ap);
202 va_end(ap);
203 ndr->private_data = talloc_asprintf_append_buffer((char *)ndr->private_data,
204 "\n");
205 }
206
207 /*
208 a useful helper function for printing idl structures via DEBUG()
209 */
210 _PUBLIC_ void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr)
211 {
212 struct ndr_print *ndr;
213
214 DEBUG(1,(" "));
215
216 ndr = talloc_zero(NULL, struct ndr_print);
217 if (!ndr) return;
218 ndr->print = ndr_print_debug_helper;
219 ndr->depth = 1;
220 ndr->flags = 0;
221 fn(ndr, name, ptr);
222 talloc_free(ndr);
223 }
224
225 /*
226 a useful helper function for printing idl unions via DEBUG()
227 */
228 _PUBLIC_ void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
229 {
230 struct ndr_print *ndr;
231
232 DEBUG(1,(" "));
233
234 ndr = talloc_zero(NULL, struct ndr_print);
235 if (!ndr) return;
236 ndr->print = ndr_print_debug_helper;
237 ndr->depth = 1;
238 ndr->flags = 0;
239 ndr_print_set_switch_value(ndr, ptr, level);
240 fn(ndr, name, ptr);
241 talloc_free(ndr);
242 }
243
244 /*
245 a useful helper function for printing idl function calls via DEBUG()
246 */
247 _PUBLIC_ void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
248 {
249 struct ndr_print *ndr;
250
251 DEBUG(1,(" "));
252
253 ndr = talloc_zero(NULL, struct ndr_print);
254 if (!ndr) return;
255 ndr->print = ndr_print_debug_helper;
256 ndr->depth = 1;
257 ndr->flags = 0;
258
259 /* this is a s4 hack until we build up the courage to pass
260 * this all the way down
261 */
262 #if _SAMBA_BUILD_ == 4
263 ndr->iconv_convenience = smb_iconv_convenience_reinit(talloc_autofree_context(),
264 "ASCII", "UTF-8", true, NULL);
265 #endif
266
267 fn(ndr, name, flags, ptr);
268 talloc_free(ndr);
269 }
270
271 /*
272 a useful helper function for printing idl structures to a string
273 */
274 _PUBLIC_ char *ndr_print_struct_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, void *ptr)
275 {
276 struct ndr_print *ndr;
277 char *ret = NULL;
278
279 ndr = talloc_zero(mem_ctx, struct ndr_print);
280 if (!ndr) return NULL;
281 ndr->private_data = talloc_strdup(ndr, "");
282 if (!ndr->private_data) {
283 goto failed;
284 }
285 ndr->print = ndr_print_string_helper;
286 ndr->depth = 1;
287 ndr->flags = 0;
288
289 /* this is a s4 hack until we build up the courage to pass
290 * this all the way down
291 */
292 #if _SAMBA_BUILD_ == 4
293 ndr->iconv_convenience = smb_iconv_convenience_reinit(talloc_autofree_context(),
294 "ASCII", "UTF-8", true, NULL);
295 #endif
296
297 fn(ndr, name, ptr);
298 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
299 failed:
300 talloc_free(ndr);
301 return ret;
302 }
303
304 /*
305 a useful helper function for printing idl unions to a string
306 */
307 _PUBLIC_ char *ndr_print_union_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
308 {
309 struct ndr_print *ndr;
310 char *ret = NULL;
311
312 ndr = talloc_zero(mem_ctx, struct ndr_print);
313 if (!ndr) return NULL;
314 ndr->private_data = talloc_strdup(ndr, "");
315 if (!ndr->private_data) {
316 goto failed;
317 }
318 ndr->print = ndr_print_string_helper;
319 ndr->depth = 1;
320 ndr->flags = 0;
321 ndr_print_set_switch_value(ndr, ptr, level);
322 fn(ndr, name, ptr);
323 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
324 failed:
325 talloc_free(ndr);
326 return ret;
327 }
328
329 /*
330 a useful helper function for printing idl function calls to a string
331 */
332 _PUBLIC_ char *ndr_print_function_string(TALLOC_CTX *mem_ctx,
333 ndr_print_function_t fn, const char *name,
334 int flags, void *ptr)
335 {
336 struct ndr_print *ndr;
337 char *ret = NULL;
338
339 ndr = talloc_zero(mem_ctx, struct ndr_print);
340 if (!ndr) return NULL;
341 ndr->private_data = talloc_strdup(ndr, "");
342 if (!ndr->private_data) {
343 goto failed;
344 }
345 ndr->print = ndr_print_string_helper;
346 ndr->depth = 1;
347 ndr->flags = 0;
348 fn(ndr, name, flags, ptr);
349 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
350 failed:
351 talloc_free(ndr);
352 return ret;
353 }
354
355 _PUBLIC_ void ndr_set_flags(uint32_t *pflags, uint32_t new_flags)
356 {
357 /* the big/little endian flags are inter-dependent */
358 if (new_flags & LIBNDR_FLAG_LITTLE_ENDIAN) {
359 (*pflags) &= ~LIBNDR_FLAG_BIGENDIAN;
360 (*pflags) &= ~LIBNDR_FLAG_NDR64;
361 }
362 if (new_flags & LIBNDR_FLAG_BIGENDIAN) {
363 (*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN;
364 (*pflags) &= ~LIBNDR_FLAG_NDR64;
365 }
366 if (new_flags & LIBNDR_FLAG_REMAINING) {
367 (*pflags) &= ~LIBNDR_ALIGN_FLAGS;
368 }
369 if (new_flags & LIBNDR_ALIGN_FLAGS) {
370 (*pflags) &= ~LIBNDR_FLAG_REMAINING;
371 }
372 if (new_flags & LIBNDR_FLAG_NO_RELATIVE_REVERSE) {
373 (*pflags) &= ~LIBNDR_FLAG_RELATIVE_REVERSE;
374 }
375 (*pflags) |= new_flags;
376 }
377
378 /*
379 return and possibly log an NDR error
380 */
381 _PUBLIC_ enum ndr_err_code ndr_pull_error(struct ndr_pull *ndr,
382 enum ndr_err_code ndr_err,
383 const char *format, ...)
384 {
385 char *s=NULL;
386 va_list ap;
387 int ret;
388
389 va_start(ap, format);
390 ret = vasprintf(&s, format, ap);
391 va_end(ap);
392
393 if (ret == -1) {
394 return NDR_ERR_ALLOC;
395 }
396
397 DEBUG(1,("ndr_pull_error(%u): %s\n", ndr_err, s));
398
399 free(s);
400
401 return ndr_err;
402 }
403
404 /*
405 return and possibly log an NDR error
406 */
407 _PUBLIC_ enum ndr_err_code ndr_push_error(struct ndr_push *ndr,
408 enum ndr_err_code ndr_err,
409 const char *format, ...)
410 {
411 char *s=NULL;
412 va_list ap;
413 int ret;
414
415 va_start(ap, format);
416 ret = vasprintf(&s, format, ap);
417 va_end(ap);
418
419 if (ret == -1) {
420 return NDR_ERR_ALLOC;
421 }
422
423 DEBUG(1,("ndr_push_error(%u): %s\n", ndr_err, s));
424
425 free(s);
426
427 return ndr_err;
428 }
429
430 /*
431 handle subcontext buffers, which in midl land are user-marshalled, but
432 we use magic in pidl to make them easier to cope with
433 */
434 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_start(struct ndr_pull *ndr,
435 struct ndr_pull **_subndr,
436 size_t header_size,
437 ssize_t size_is)
438 {
439 struct ndr_pull *subndr;
440 uint32_t r_content_size;
441 bool force_le = false;
442 bool force_be = false;
443
444 switch (header_size) {
445 case 0: {
446 uint32_t content_size = ndr->data_size - ndr->offset;
447 if (size_is >= 0) {
448 content_size = size_is;
449 }
450 r_content_size = content_size;
451 break;
452 }
453
454 case 2: {
455 uint16_t content_size;
456 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &content_size));
457 if (size_is >= 0 && size_is != content_size) {
458 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
459 (int)size_is, (int)content_size);
460 }
461 r_content_size = content_size;
462 break;
463 }
464
465 case 4: {
466 uint32_t content_size;
467 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &content_size));
468 if (size_is >= 0 && size_is != content_size) {
469 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
470 (int)size_is, (int)content_size);
471 }
472 r_content_size = content_size;
473 break;
474 }
475 case 0xFFFFFC01: {
476 /*
477 * Common Type Header for the Serialization Stream
478 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
479 */
480 uint8_t version;
481 uint8_t drep;
482 uint16_t hdrlen;
483 uint32_t filler;
484 uint32_t content_size;
485 uint32_t reserved;
486
487 /* version */
488 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &version));
489
490 if (version != 1) {
491 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
492 "Bad subcontext (PULL) Common Type Header version %d != 1",
493 (int)version);
494 }
495
496 /*
497 * 0x10 little endian
498 * 0x00 big endian
499 */
500 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &drep));
501 if (drep == 0x10) {
502 force_le = true;
503 } else if (drep == 0x00) {
504 force_be = true;
505 } else {
506 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
507 "Bad subcontext (PULL) Common Type Header invalid drep 0x%02X",
508 (unsigned int)drep);
509 }
510
511 /* length of the "Private Header for Constructed Type" */
512 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &hdrlen));
513 if (hdrlen != 8) {
514 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
515 "Bad subcontext (PULL) Common Type Header length %d != 8",
516 (int)hdrlen);
517 }
518
519 /* filler should be ignored */
520 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &filler));
521
522 /*
523 * Private Header for Constructed Type
524 */
525 /* length - will be updated latter */
526 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
527 if (size_is >= 0 && size_is != content_size) {
528 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
529 (int)size_is, (int)content_size);
530 }
531 /* the content size must be a multiple of 8 */
532 if ((content_size % 8) != 0) {
533 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
534 "Bad subcontext (PULL) size_is(%d) not padded to 8 content_size %d",
535 (int)size_is, (int)content_size);
536 }
537 r_content_size = content_size;
538
539 /* reserved */
540 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &reserved));
541 break;
542 }
543 default:
544 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) header_size %d",
545 (int)header_size);
546 }
547
548 NDR_PULL_NEED_BYTES(ndr, r_content_size);
549
550 subndr = talloc_zero(ndr, struct ndr_pull);
551 NDR_ERR_HAVE_NO_MEMORY(subndr);
552 subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
553 subndr->current_mem_ctx = ndr->current_mem_ctx;
554
555 subndr->data = ndr->data + ndr->offset;
556 subndr->offset = 0;
557 subndr->data_size = r_content_size;
558 subndr->iconv_convenience = talloc_reference(subndr, ndr->iconv_convenience);
559
560 if (force_le) {
561 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_LITTLE_ENDIAN);
562 } else if (force_be) {
563 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_BIGENDIAN);
564 }
565
566 *_subndr = subndr;
567 return NDR_ERR_SUCCESS;
568 }
569
570 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_end(struct ndr_pull *ndr,
571 struct ndr_pull *subndr,
572 size_t header_size,
573 ssize_t size_is)
574 {
575 uint32_t advance;
576 if (size_is >= 0) {
577 advance = size_is;
578 } else if (header_size > 0) {
579 advance = subndr->data_size;
580 } else {
581 advance = subndr->offset;
582 }
583 NDR_CHECK(ndr_pull_advance(ndr, advance));
584 return NDR_ERR_SUCCESS;
585 }
586
587 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_start(struct ndr_push *ndr,
588 struct ndr_push **_subndr,
589 size_t header_size,
590 ssize_t size_is)
591 {
592 struct ndr_push *subndr;
593
594 subndr = ndr_push_init_ctx(ndr, ndr->iconv_convenience);
595 NDR_ERR_HAVE_NO_MEMORY(subndr);
596 subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
597
598 if (size_is > 0) {
599 NDR_CHECK(ndr_push_zero(subndr, size_is));
600 subndr->offset = 0;
601 subndr->relative_end_offset = size_is;
602 }
603
604 *_subndr = subndr;
605 return NDR_ERR_SUCCESS;
606 }
607
608 /*
609 push a subcontext header
610 */
611 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_end(struct ndr_push *ndr,
612 struct ndr_push *subndr,
613 size_t header_size,
614 ssize_t size_is)
615 {
616 ssize_t padding_len;
617
618 if (size_is >= 0) {
619 padding_len = size_is - subndr->offset;
620 if (padding_len < 0) {
621 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PUSH) content_size %d is larger than size_is(%d)",
622 (int)subndr->offset, (int)size_is);
623 }
624 subndr->offset = size_is;
625 }
626
627 switch (header_size) {
628 case 0:
629 break;
630
631 case 2:
632 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, subndr->offset));
633 break;
634
635 case 4:
636 NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, subndr->offset));
637 break;
638
639 case 0xFFFFFC01:
640 /*
641 * Common Type Header for the Serialization Stream
642 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
643 */
644 padding_len = NDR_ROUND(subndr->offset, 8) - subndr->offset;
645 if (padding_len > 0) {
646 NDR_CHECK(ndr_push_zero(subndr, padding_len));
647 }
648
649 /* version */
650 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, 1));
651
652 /*
653 * 0x10 little endian
654 * 0x00 big endian
655 */
656 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, NDR_BE(ndr)?0x00:0x10));
657
658 /* length of the "Private Header for Constructed Type" */
659 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 8));
660
661 /* filler */
662 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0xCCCCCCCC));
663
664 /*
665 * Private Header for Constructed Type
666 */
667 /* length - will be updated latter */
668 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
669
670 /* reserved */
671 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
672 break;
673
674 default:
675 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext header size %d",
676 (int)header_size);
677 }
678
679 NDR_CHECK(ndr_push_bytes(ndr, subndr->data, subndr->offset));
680 return NDR_ERR_SUCCESS;
681 }
682
683 /*
684 store a token in the ndr context, for later retrieval
685 */
686 _PUBLIC_ enum ndr_err_code ndr_token_store(TALLOC_CTX *mem_ctx,
687 struct ndr_token_list **list,
688 const void *key,
689 uint32_t value)
690 {
691 struct ndr_token_list *tok;
692 tok = talloc(mem_ctx, struct ndr_token_list);
693 NDR_ERR_HAVE_NO_MEMORY(tok);
694 tok->key = key;
695 tok->value = value;
696 DLIST_ADD((*list), tok);
697 return NDR_ERR_SUCCESS;
698 }
699
700 /*
701 retrieve a token from a ndr context, using cmp_fn to match the tokens
702 */
703 _PUBLIC_ enum ndr_err_code ndr_token_retrieve_cmp_fn(struct ndr_token_list **list, const void *key, uint32_t *v,
704 comparison_fn_t _cmp_fn, bool _remove_tok)
705 {
706 struct ndr_token_list *tok;
707 for (tok=*list;tok;tok=tok->next) {
708 if (_cmp_fn && _cmp_fn(tok->key,key)==0) goto found;
709 else if (!_cmp_fn && tok->key == key) goto found;
710 }
711 return NDR_ERR_TOKEN;
712 found:
713 *v = tok->value;
714 if (_remove_tok) {
715 DLIST_REMOVE((*list), tok);
716 talloc_free(tok);
717 }
718 return NDR_ERR_SUCCESS;
719 }
720
721 /*
722 retrieve a token from a ndr context
723 */
724 _PUBLIC_ enum ndr_err_code ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
725 {
726 return ndr_token_retrieve_cmp_fn(list, key, v, NULL, true);
727 }
728
729 /*
730 peek at but don't removed a token from a ndr context
731 */
732 _PUBLIC_ uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
733 {
734 enum ndr_err_code status;
735 uint32_t v;
736
737 status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, false);
738 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
739 return 0;
740 }
741
742 return v;
743 }
744
745 /*
746 pull an array size field and add it to the array_size_list token list
747 */
748 _PUBLIC_ enum ndr_err_code ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
749 {
750 uint32_t size;
751 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &size));
752 return ndr_token_store(ndr, &ndr->array_size_list, p, size);
753 }
754
755 /*
756 get the stored array size field
757 */
758 _PUBLIC_ uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p)
759 {
760 return ndr_token_peek(&ndr->array_size_list, p);
761 }
762
763 /*
764 check the stored array size field
765 */
766 _PUBLIC_ enum ndr_err_code ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size)
767 {
768 uint32_t stored;
769 stored = ndr_token_peek(&ndr->array_size_list, p);
770 if (stored != size) {
771 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
772 "Bad array size - got %u expected %u\n",
773 stored, size);
774 }
775 return NDR_ERR_SUCCESS;
776 }
777
778 /*
779 pull an array length field and add it to the array_length_list token list
780 */
781 _PUBLIC_ enum ndr_err_code ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
782 {
783 uint32_t length, offset;
784 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &offset));
785 if (offset != 0) {
786 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
787 "non-zero array offset %u\n", offset);
788 }
789 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &length));
790 return ndr_token_store(ndr, &ndr->array_length_list, p, length);
791 }
792
793 /*
794 get the stored array length field
795 */
796 _PUBLIC_ uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p)
797 {
798 return ndr_token_peek(&ndr->array_length_list, p);
799 }
800
801 /*
802 check the stored array length field
803 */
804 _PUBLIC_ enum ndr_err_code ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
805 {
806 uint32_t stored;
807 stored = ndr_token_peek(&ndr->array_length_list, p);
808 if (stored != length) {
809 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
810 "Bad array length - got %u expected %u\n",
811 stored, length);
812 }
813 return NDR_ERR_SUCCESS;
814 }
815
816 /*
817 store a switch value
818 */
819 _PUBLIC_ enum ndr_err_code ndr_push_set_switch_value(struct ndr_push *ndr, const void *p, uint32_t val)
820 {
821 return ndr_token_store(ndr, &ndr->switch_list, p, val);
822 }
823
824 _PUBLIC_ enum ndr_err_code ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val)
825 {
826 return ndr_token_store(ndr, &ndr->switch_list, p, val);
827 }
828
829 _PUBLIC_ enum ndr_err_code ndr_print_set_switch_value(struct ndr_print *ndr, const void *p, uint32_t val)
830 {
831 return ndr_token_store(ndr, &ndr->switch_list, p, val);
832 }
833
834 /*
835 retrieve a switch value
836 */
837 _PUBLIC_ uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p)
838 {
839 return ndr_token_peek(&ndr->switch_list, p);
840 }
841
842 _PUBLIC_ uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p)
843 {
844 return ndr_token_peek(&ndr->switch_list, p);
845 }
846
847 _PUBLIC_ uint32_t ndr_print_get_switch_value(struct ndr_print *ndr, const void *p)
848 {
849 return ndr_token_peek(&ndr->switch_list, p);
850 }
851
852 /*
853 pull a struct from a blob using NDR
854 */
855 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, void *p,
856 ndr_pull_flags_fn_t fn)
857 {
858 struct ndr_pull *ndr;
859 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
860 NDR_ERR_HAVE_NO_MEMORY(ndr);
861 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
862 talloc_free(ndr);
863 return NDR_ERR_SUCCESS;
864 }
865
866 /*
867 pull a struct from a blob using NDR - failing if all bytes are not consumed
868 */
869 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
870 struct smb_iconv_convenience *iconv_convenience,
871 void *p, ndr_pull_flags_fn_t fn)
872 {
873 struct ndr_pull *ndr;
874 uint32_t highest_ofs;
875 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
876 NDR_ERR_HAVE_NO_MEMORY(ndr);
877 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
878 if (ndr->offset > ndr->relative_highest_offset) {
879 highest_ofs = ndr->offset;
880 } else {
881 highest_ofs = ndr->relative_highest_offset;
882 }
883 if (highest_ofs < ndr->data_size) {
884 enum ndr_err_code ret;
885 ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
886 "not all bytes consumed ofs[%u] size[%u]",
887 highest_ofs, ndr->data_size);
888 talloc_free(ndr);
889 return ret;
890 }
891 talloc_free(ndr);
892 return NDR_ERR_SUCCESS;
893 }
894
895 /*
896 pull a union from a blob using NDR, given the union discriminator
897 */
898 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
899 struct smb_iconv_convenience *iconv_convenience, void *p,
900 uint32_t level, ndr_pull_flags_fn_t fn)
901 {
902 struct ndr_pull *ndr;
903 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
904 NDR_ERR_HAVE_NO_MEMORY(ndr);
905 NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
906 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
907 talloc_free(ndr);
908 return NDR_ERR_SUCCESS;
909 }
910
911 /*
912 pull a union from a blob using NDR, given the union discriminator,
913 failing if all bytes are not consumed
914 */
915 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
916 struct smb_iconv_convenience *iconv_convenience, void *p,
917 uint32_t level, ndr_pull_flags_fn_t fn)
918 {
919 struct ndr_pull *ndr;
920 uint32_t highest_ofs;
921 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
922 NDR_ERR_HAVE_NO_MEMORY(ndr);
923 NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
924 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
925 if (ndr->offset > ndr->relative_highest_offset) {
926 highest_ofs = ndr->offset;
927 } else {
928 highest_ofs = ndr->relative_highest_offset;
929 }
930 if (highest_ofs < ndr->data_size) {
931 enum ndr_err_code ret;
932 ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
933 "not all bytes consumed ofs[%u] size[%u]",
934 highest_ofs, ndr->data_size);
935 talloc_free(ndr);
936 return ret;
937 }
938 talloc_free(ndr);
939 return NDR_ERR_SUCCESS;
940 }
941
942 /*
943 push a struct to a blob using NDR
944 */
945 _PUBLIC_ enum ndr_err_code ndr_push_struct_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, const void *p, ndr_push_flags_fn_t fn)
946 {
947 struct ndr_push *ndr;
948 ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
949 NDR_ERR_HAVE_NO_MEMORY(ndr);
950
951 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
952
953 *blob = ndr_push_blob(ndr);
954 talloc_steal(mem_ctx, blob->data);
955 talloc_free(ndr);
956
957 return NDR_ERR_SUCCESS;
958 }
959
960 /*
961 push a union to a blob using NDR
962 */
963 _PUBLIC_ enum ndr_err_code ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, void *p,
964 uint32_t level, ndr_push_flags_fn_t fn)
965 {
966 struct ndr_push *ndr;
967 ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
968 NDR_ERR_HAVE_NO_MEMORY(ndr);
969
970 NDR_CHECK(ndr_push_set_switch_value(ndr, p, level));
971 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
972
973 *blob = ndr_push_blob(ndr);
974 talloc_steal(mem_ctx, blob->data);
975 talloc_free(ndr);
976
977 return NDR_ERR_SUCCESS;
978 }
979
980 /*
981 generic ndr_size_*() handler for structures
982 */
983 _PUBLIC_ size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push, struct smb_iconv_convenience *iconv_convenience)
984 {
985 struct ndr_push *ndr;
986 enum ndr_err_code status;
987 size_t ret;
988
989 /* avoid recursion */
990 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
991
992 ndr = ndr_push_init_ctx(NULL, iconv_convenience);
993 if (!ndr) return 0;
994 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
995 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, discard_const(p));
996 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
997 talloc_free(ndr);
998 return 0;
999 }
1000 ret = ndr->offset;
1001 talloc_free(ndr);
1002 return ret;
1003 }
1004
1005 /*
1006 generic ndr_size_*() handler for unions
1007 */
1008 _PUBLIC_ size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push, struct smb_iconv_convenience *iconv_convenience)
1009 {
1010 struct ndr_push *ndr;
1011 enum ndr_err_code status;
1012 size_t ret;
1013
1014 /* avoid recursion */
1015 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
1016
1017 ndr = ndr_push_init_ctx(NULL, iconv_convenience);
1018 if (!ndr) return 0;
1019 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
1020
1021 status = ndr_push_set_switch_value(ndr, p, level);
1022 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1023 talloc_free(ndr);
1024 return 0;
1025 }
1026 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
1027 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1028 talloc_free(ndr);
1029 return 0;
1030 }
1031 ret = ndr->offset;
1032 talloc_free(ndr);
1033 return ret;
1034 }
1035
1036 /*
1037 get the current base for relative pointers for the push
1038 */
1039 _PUBLIC_ uint32_t ndr_push_get_relative_base_offset(struct ndr_push *ndr)
1040 {
1041 return ndr->relative_base_offset;
1042 }
1043
1044 /*
1045 restore the old base for relative pointers for the push
1046 */
1047 _PUBLIC_ void ndr_push_restore_relative_base_offset(struct ndr_push *ndr, uint32_t offset)
1048 {
1049 ndr->relative_base_offset = offset;
1050 }
1051
1052 /*
1053 setup the current base for relative pointers for the push
1054 called in the NDR_SCALAR stage
1055 */
1056 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset1(struct ndr_push *ndr, const void *p, uint32_t offset)
1057 {
1058 ndr->relative_base_offset = offset;
1059 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1060 }
1061
1062 /*
1063 setup the current base for relative pointers for the push
1064 called in the NDR_BUFFERS stage
1065 */
1066 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset2(struct ndr_push *ndr, const void *p)
1067 {
1068 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1069 }
1070
1071 /*
1072 push a relative object - stage1
1073 this is called during SCALARS processing
1074 */
1075 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p)
1076 {
1077 if (p == NULL) {
1078 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
1079 return NDR_ERR_SUCCESS;
1080 }
1081 NDR_CHECK(ndr_push_align(ndr, 4));
1082 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1083 return ndr_push_uint32(ndr, NDR_SCALARS, 0xFFFFFFFF);
1084 }
1085
1086 /*
1087 push a short relative object - stage1
1088 this is called during SCALARS processing
1089 */
1090 _PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr1(struct ndr_push *ndr, const void *p)
1091 {
1092 if (p == NULL) {
1093 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 0));
1094 return NDR_ERR_SUCCESS;
1095 }
1096 NDR_CHECK(ndr_push_align(ndr, 2));
1097 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1098 return ndr_push_uint16(ndr, NDR_SCALARS, 0xFFFF);
1099 }
1100 /*
1101 push a relative object - stage2
1102 this is called during buffers processing
1103 */
1104 static enum ndr_err_code ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p)
1105 {
1106 uint32_t save_offset;
1107 uint32_t ptr_offset = 0xFFFFFFFF;
1108 if (p == NULL) {
1109 return NDR_ERR_SUCCESS;
1110 }
1111 save_offset = ndr->offset;
1112 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1113 if (ptr_offset > ndr->offset) {
1114 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1115 "ndr_push_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1116 ptr_offset, ndr->offset);
1117 }
1118 ndr->offset = ptr_offset;
1119 if (save_offset < ndr->relative_base_offset) {
1120 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1121 "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1122 save_offset, ndr->relative_base_offset);
1123 }
1124 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1125 ndr->offset = save_offset;
1126 return NDR_ERR_SUCCESS;
1127 }
1128 /*
1129 push a short relative object - stage2
1130 this is called during buffers processing
1131 */
1132 _PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr2(struct ndr_push *ndr, const void *p)
1133 {
1134 uint32_t save_offset;
1135 uint32_t ptr_offset = 0xFFFF;
1136 if (p == NULL) {
1137 return NDR_ERR_SUCCESS;
1138 }
1139 save_offset = ndr->offset;
1140 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1141 if (ptr_offset > ndr->offset) {
1142 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1143 "ndr_push_short_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1144 ptr_offset, ndr->offset);
1145 }
1146 ndr->offset = ptr_offset;
1147 if (save_offset < ndr->relative_base_offset) {
1148 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1149 "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1150 save_offset, ndr->relative_base_offset);
1151 }
1152 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1153 ndr->offset = save_offset;
1154 return NDR_ERR_SUCCESS;
1155 }
1156
1157 /*
1158 push a relative object - stage2 start
1159 this is called during buffers processing
1160 */
1161 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_start(struct ndr_push *ndr, const void *p)
1162 {
1163 if (p == NULL) {
1164 return NDR_ERR_SUCCESS;
1165 }
1166 if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
1167 return ndr_push_relative_ptr2(ndr, p);
1168 }
1169 if (ndr->relative_end_offset == -1) {
1170 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1171 "ndr_push_relative_ptr2_start RELATIVE_REVERSE flag set and relative_end_offset %d",
1172 ndr->relative_end_offset);
1173 }
1174 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_begin_list, p, ndr->offset));
1175 return NDR_ERR_SUCCESS;
1176 }
1177
1178 /*
1179 push a relative object - stage2 end
1180 this is called during buffers processing
1181 */
1182 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_end(struct ndr_push *ndr, const void *p)
1183 {
1184 uint32_t begin_offset = 0xFFFFFFFF;
1185 ssize_t len;
1186 uint32_t correct_offset = 0;
1187 uint32_t align = 1;
1188 uint32_t pad = 0;
1189
1190 if (p == NULL) {
1191 return NDR_ERR_SUCCESS;
1192 }
1193
1194 if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
1195 return NDR_ERR_SUCCESS;
1196 }
1197
1198 if (ndr->flags & LIBNDR_FLAG_NO_NDR_SIZE) {
1199 /* better say more than calculation a too small buffer */
1200 NDR_PUSH_ALIGN(ndr, 8);
1201 return NDR_ERR_SUCCESS;
1202 }
1203
1204 if (ndr->relative_end_offset < ndr->offset) {
1205 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1206 "ndr_push_relative_ptr2_end:"
1207 "relative_end_offset %u < offset %u",
1208 ndr->relative_end_offset, ndr->offset);
1209 }
1210
1211 NDR_CHECK(ndr_token_retrieve(&ndr->relative_begin_list, p, &begin_offset));
1212
1213 /* we have marshalled a buffer, see how long it was */
1214 len = ndr->offset - begin_offset;
1215
1216 if (len < 0) {
1217 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1218 "ndr_push_relative_ptr2_end:"
1219 "offset %u - begin_offset %u < 0",
1220 ndr->offset, begin_offset);
1221 }
1222
1223 if (ndr->relative_end_offset < len) {
1224 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1225 "ndr_push_relative_ptr2_end:"
1226 "relative_end_offset %u < len %lld",
1227 ndr->offset, (long long)len);
1228 }
1229
1230 /* the reversed offset is at the end of the main buffer */
1231 correct_offset = ndr->relative_end_offset - len;
1232
1233 /* TODO: remove this hack and let the idl use FLAG_ALIGN2 explicit */
1234 align = 2;
1235
1236 if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
1237 align = 2;
1238 } else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
1239 align = 4;
1240 } else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
1241 align = 8;
1242 }
1243
1244 pad = ndr_align_size(correct_offset, align);
1245 if (pad) {
1246 correct_offset += pad;
1247 correct_offset -= align;
1248 }
1249
1250 if (correct_offset < begin_offset) {
1251 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1252 "ndr_push_relative_ptr2_end: "
1253 "correct_offset %u < begin_offset %u",
1254 correct_offset, begin_offset);
1255 }
1256
1257 if (len > 0) {
1258 uint32_t clear_size = correct_offset - begin_offset;
1259
1260 clear_size = MIN(clear_size, len);
1261
1262 /* now move the marshalled buffer to the end of the main buffer */
1263 memmove(ndr->data + correct_offset, ndr->data + begin_offset, len);
1264
1265 if (clear_size) {
1266 /* and wipe out old buffer within the main buffer */
1267 memset(ndr->data + begin_offset, '\0', clear_size);
1268 }
1269 }
1270
1271 /* and set the end offset for the next buffer */
1272 ndr->relative_end_offset = correct_offset;
1273
1274 /* finally write the offset to the main buffer */
1275 ndr->offset = correct_offset;
1276 NDR_CHECK(ndr_push_relative_ptr2(ndr, p));
1277
1278 /* restore to where we were in the main buffer */
1279 ndr->offset = begin_offset;
1280
1281 return NDR_ERR_SUCCESS;
1282 }
1283
1284 /*
1285 get the current base for relative pointers for the pull
1286 */
1287 _PUBLIC_ uint32_t ndr_pull_get_relative_base_offset(struct ndr_pull *ndr)
1288 {
1289 return ndr->relative_base_offset;
1290 }
1291
1292 /*
1293 restore the old base for relative pointers for the pull
1294 */
1295 _PUBLIC_ void ndr_pull_restore_relative_base_offset(struct ndr_pull *ndr, uint32_t offset)
1296 {
1297 ndr->relative_base_offset = offset;
1298 }
1299
1300 /*
1301 setup the current base for relative pointers for the pull
1302 called in the NDR_SCALAR stage
1303 */
1304 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset1(struct ndr_pull *ndr, const void *p, uint32_t offset)
1305 {
1306 ndr->relative_base_offset = offset;
1307 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1308 }
1309
1310 /*
1311 setup the current base for relative pointers for the pull
1312 called in the NDR_BUFFERS stage
1313 */
1314 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset2(struct ndr_pull *ndr, const void *p)
1315 {
1316 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1317 }
1318
1319 /*
1320 pull a relative object - stage1
1321 called during SCALARS processing
1322 */
1323 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset)
1324 {
1325 rel_offset += ndr->relative_base_offset;
1326 if (rel_offset > ndr->data_size) {
1327 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
1328 "ndr_pull_relative_ptr1 rel_offset(%u) > ndr->data_size(%u)",
1329 rel_offset, ndr->data_size);
1330 }
1331 return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
1332 }
1333
1334 /*
1335 pull a relative object - stage2
1336 called during BUFFERS processing
1337 */
1338 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr2(struct ndr_pull *ndr, const void *p)
1339 {
1340 uint32_t rel_offset;
1341 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset));
1342 return ndr_pull_set_offset(ndr, rel_offset);
1343 }
1344
1345 const static struct {
1346 enum ndr_err_code err;
1347 const char *string;
1348 } ndr_err_code_strings[] = {
1349 { NDR_ERR_SUCCESS, "Success" },
1350 { NDR_ERR_ARRAY_SIZE, "Bad Array Size" },
1351 { NDR_ERR_BAD_SWITCH, "Bad Switch" },
1352 { NDR_ERR_OFFSET, "Offset Error" },
1353 { NDR_ERR_RELATIVE, "Relative Pointer Error" },
1354 { NDR_ERR_CHARCNV, "Character Conversion Error" },
1355 { NDR_ERR_LENGTH, "Length Error" },
1356 { NDR_ERR_SUBCONTEXT, "Subcontext Error" },
1357 { NDR_ERR_COMPRESSION, "Compression Error" },
1358 { NDR_ERR_STRING, "String Error" },
1359 { NDR_ERR_VALIDATE, "Validate Error" },
1360 { NDR_ERR_BUFSIZE, "Buffer Size Error" },
1361 { NDR_ERR_ALLOC, "Allocation Error" },
1362 { NDR_ERR_RANGE, "Range Error" },
1363 { NDR_ERR_TOKEN, "Token Error" },
1364 { NDR_ERR_IPV4ADDRESS, "IPv4 Address Error" },
1365 { NDR_ERR_INVALID_POINTER, "Invalid Pointer" },
1366 { NDR_ERR_UNREAD_BYTES, "Unread Bytes" },
1367 { NDR_ERR_NDR64, "NDR64 assertion error" },
1368 { 0, NULL }
1369 };
1370
1371 _PUBLIC_ const char *ndr_map_error2string(enum ndr_err_code ndr_err)
1372 {
1373 int i;
1374 for (i = 0; ndr_err_code_strings[i].string != NULL; i++) {
1375 if (ndr_err_code_strings[i].err == ndr_err)
1376 return ndr_err_code_strings[i].string;
1377 }
1378 return "Unknown error";
1379 }
reg import