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s3:smbd: use PROTOCOL_SMB2_02 instead PROTOCOL_SMB2
[Samba/gebeck_regimport.git] / librpc / ndr / ndr.c
blob7cb6e214ba3aa0fc5c15e45088aebb49305061ef
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
33 #define NDR_BASE_MARSHALL_SIZE 1024
34
35 /* this guid indicates NDR encoding in a protocol tower */
36 const struct ndr_syntax_id ndr_transfer_syntax = {
37 { 0x8a885d04, 0x1ceb, 0x11c9, {0x9f, 0xe8}, {0x08,0x00,0x2b,0x10,0x48,0x60} },
38 2
39 };
40
41 const struct ndr_syntax_id ndr64_transfer_syntax = {
42 { 0x71710533, 0xbeba, 0x4937, {0x83, 0x19}, {0xb5,0xdb,0xef,0x9c,0xcc,0x36} },
43 1
44 };
45
46 const struct ndr_syntax_id null_ndr_syntax_id = {
47 { 0, 0, 0, { 0, 0 }, { 0, 0, 0, 0, 0, 0 } },
48 0
49 };
50
51 /*
52 work out the number of bytes needed to align on a n byte boundary
53 */
54 _PUBLIC_ size_t ndr_align_size(uint32_t offset, size_t n)
55 {
56 if ((offset & (n-1)) == 0) return 0;
57 return n - (offset & (n-1));
58 }
59
60 /*
61 initialise a ndr parse structure from a data blob
62 */
63 _PUBLIC_ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx)
64 {
65 struct ndr_pull *ndr;
66
67 ndr = talloc_zero(mem_ctx, struct ndr_pull);
68 if (!ndr) return NULL;
69 ndr->current_mem_ctx = mem_ctx;
70
71 ndr->data = blob->data;
72 ndr->data_size = blob->length;
73
74 return ndr;
75 }
76
77 /*
78 advance by 'size' bytes
79 */
80 _PUBLIC_ enum ndr_err_code ndr_pull_advance(struct ndr_pull *ndr, uint32_t size)
81 {
82 ndr->offset += size;
83 if (ndr->offset > ndr->data_size) {
84 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
85 "ndr_pull_advance by %u failed",
86 size);
87 }
88 return NDR_ERR_SUCCESS;
89 }
90
91 /*
92 set the parse offset to 'ofs'
93 */
94 static enum ndr_err_code ndr_pull_set_offset(struct ndr_pull *ndr, uint32_t ofs)
95 {
96 ndr->offset = ofs;
97 if (ndr->offset > ndr->data_size) {
98 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
99 "ndr_pull_set_offset %u failed",
100 ofs);
101 }
102 return NDR_ERR_SUCCESS;
103 }
104
105 /* create a ndr_push structure, ready for some marshalling */
106 _PUBLIC_ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx)
107 {
108 struct ndr_push *ndr;
109
110 ndr = talloc_zero(mem_ctx, struct ndr_push);
111 if (!ndr) {
112 return NULL;
113 }
114
115 ndr->flags = 0;
116 ndr->alloc_size = NDR_BASE_MARSHALL_SIZE;
117 ndr->data = talloc_array(ndr, uint8_t, ndr->alloc_size);
118 if (!ndr->data) {
119 return NULL;
120 }
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 uint32_t i;
172 int ret;
173
174 va_start(ap, format);
175 ret = vasprintf(&s, format, ap);
176 va_end(ap);
177
178 if (ret == -1) {
179 return;
180 }
181
182 if (ndr->no_newline) {
183 DEBUGADD(1,("%s", s));
184 free(s);
185 return;
186 }
187
188 for (i=0;i<ndr->depth;i++) {
189 DEBUGADD(1,(" "));
190 }
191
192 DEBUGADD(1,("%s\n", s));
193 free(s);
194 }
195
196 _PUBLIC_ void ndr_print_printf_helper(struct ndr_print *ndr, const char *format, ...)
197 {
198 va_list ap;
199 uint32_t i;
200
201 if (!ndr->no_newline) {
202 for (i=0;i<ndr->depth;i++) {
203 printf(" ");
204 }
205 }
206
207 va_start(ap, format);
208 vprintf(format, ap);
209 va_end(ap);
210 if (!ndr->no_newline) {
211 printf("\n");
212 }
213 }
214
215 _PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...)
216 {
217 va_list ap;
218 uint32_t i;
219
220 if (!ndr->no_newline) {
221 for (i=0;i<ndr->depth;i++) {
222 ndr->private_data = talloc_asprintf_append_buffer(
223 (char *)ndr->private_data, " ");
224 }
225 }
226
227 va_start(ap, format);
228 ndr->private_data = talloc_vasprintf_append_buffer((char *)ndr->private_data,
229 format, ap);
230 va_end(ap);
231 if (!ndr->no_newline) {
232 ndr->private_data = talloc_asprintf_append_buffer((char *)ndr->private_data,
233 "\n");
234 }
235 }
236
237 /*
238 a useful helper function for printing idl structures via DEBUG()
239 */
240 _PUBLIC_ void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr)
241 {
242 struct ndr_print *ndr;
243
244 DEBUG(1,(" "));
245
246 ndr = talloc_zero(NULL, struct ndr_print);
247 if (!ndr) return;
248 ndr->print = ndr_print_debug_helper;
249 ndr->depth = 1;
250 ndr->flags = 0;
251 fn(ndr, name, ptr);
252 talloc_free(ndr);
253 }
254
255 /*
256 a useful helper function for printing idl unions via DEBUG()
257 */
258 _PUBLIC_ void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
259 {
260 struct ndr_print *ndr;
261
262 DEBUG(1,(" "));
263
264 ndr = talloc_zero(NULL, struct ndr_print);
265 if (!ndr) return;
266 ndr->print = ndr_print_debug_helper;
267 ndr->depth = 1;
268 ndr->flags = 0;
269 ndr_print_set_switch_value(ndr, ptr, level);
270 fn(ndr, name, ptr);
271 talloc_free(ndr);
272 }
273
274 /*
275 a useful helper function for printing idl function calls via DEBUG()
276 */
277 _PUBLIC_ void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
278 {
279 struct ndr_print *ndr;
280
281 DEBUG(1,(" "));
282
283 ndr = talloc_zero(NULL, struct ndr_print);
284 if (!ndr) return;
285 ndr->print = ndr_print_debug_helper;
286 ndr->depth = 1;
287 ndr->flags = 0;
288
289 fn(ndr, name, flags, ptr);
290 talloc_free(ndr);
291 }
292
293 /*
294 a useful helper function for printing idl structures to a string
295 */
296 _PUBLIC_ char *ndr_print_struct_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, void *ptr)
297 {
298 struct ndr_print *ndr;
299 char *ret = NULL;
300
301 ndr = talloc_zero(mem_ctx, struct ndr_print);
302 if (!ndr) return NULL;
303 ndr->private_data = talloc_strdup(ndr, "");
304 if (!ndr->private_data) {
305 goto failed;
306 }
307 ndr->print = ndr_print_string_helper;
308 ndr->depth = 1;
309 ndr->flags = 0;
310
311 fn(ndr, name, ptr);
312 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
313 failed:
314 talloc_free(ndr);
315 return ret;
316 }
317
318 /*
319 a useful helper function for printing idl unions to a string
320 */
321 _PUBLIC_ char *ndr_print_union_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
322 {
323 struct ndr_print *ndr;
324 char *ret = NULL;
325
326 ndr = talloc_zero(mem_ctx, struct ndr_print);
327 if (!ndr) return NULL;
328 ndr->private_data = talloc_strdup(ndr, "");
329 if (!ndr->private_data) {
330 goto failed;
331 }
332 ndr->print = ndr_print_string_helper;
333 ndr->depth = 1;
334 ndr->flags = 0;
335 ndr_print_set_switch_value(ndr, ptr, level);
336 fn(ndr, name, ptr);
337 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
338 failed:
339 talloc_free(ndr);
340 return ret;
341 }
342
343 /*
344 a useful helper function for printing idl function calls to a string
345 */
346 _PUBLIC_ char *ndr_print_function_string(TALLOC_CTX *mem_ctx,
347 ndr_print_function_t fn, const char *name,
348 int flags, void *ptr)
349 {
350 struct ndr_print *ndr;
351 char *ret = NULL;
352
353 ndr = talloc_zero(mem_ctx, struct ndr_print);
354 if (!ndr) return NULL;
355 ndr->private_data = talloc_strdup(ndr, "");
356 if (!ndr->private_data) {
357 goto failed;
358 }
359 ndr->print = ndr_print_string_helper;
360 ndr->depth = 1;
361 ndr->flags = 0;
362 fn(ndr, name, flags, ptr);
363 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
364 failed:
365 talloc_free(ndr);
366 return ret;
367 }
368
369 _PUBLIC_ void ndr_set_flags(uint32_t *pflags, uint32_t new_flags)
370 {
371 /* the big/little endian flags are inter-dependent */
372 if (new_flags & LIBNDR_FLAG_LITTLE_ENDIAN) {
373 (*pflags) &= ~LIBNDR_FLAG_BIGENDIAN;
374 (*pflags) &= ~LIBNDR_FLAG_NDR64;
375 }
376 if (new_flags & LIBNDR_FLAG_BIGENDIAN) {
377 (*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN;
378 (*pflags) &= ~LIBNDR_FLAG_NDR64;
379 }
380 if (new_flags & LIBNDR_FLAG_REMAINING) {
381 (*pflags) &= ~LIBNDR_ALIGN_FLAGS;
382 }
383 if (new_flags & LIBNDR_ALIGN_FLAGS) {
384 (*pflags) &= ~LIBNDR_FLAG_REMAINING;
385 }
386 if (new_flags & LIBNDR_FLAG_NO_RELATIVE_REVERSE) {
387 (*pflags) &= ~LIBNDR_FLAG_RELATIVE_REVERSE;
388 }
389 (*pflags) |= new_flags;
390 }
391
392 /*
393 return and possibly log an NDR error
394 */
395 _PUBLIC_ enum ndr_err_code ndr_pull_error(struct ndr_pull *ndr,
396 enum ndr_err_code ndr_err,
397 const char *format, ...)
398 {
399 char *s=NULL;
400 va_list ap;
401 int ret;
402
403 va_start(ap, format);
404 ret = vasprintf(&s, format, ap);
405 va_end(ap);
406
407 if (ret == -1) {
408 return NDR_ERR_ALLOC;
409 }
410
411 DEBUG(1,("ndr_pull_error(%u): %s\n", ndr_err, s));
412
413 free(s);
414
415 return ndr_err;
416 }
417
418 /*
419 return and possibly log an NDR error
420 */
421 _PUBLIC_ enum ndr_err_code ndr_push_error(struct ndr_push *ndr,
422 enum ndr_err_code ndr_err,
423 const char *format, ...)
424 {
425 char *s=NULL;
426 va_list ap;
427 int ret;
428
429 va_start(ap, format);
430 ret = vasprintf(&s, format, ap);
431 va_end(ap);
432
433 if (ret == -1) {
434 return NDR_ERR_ALLOC;
435 }
436
437 DEBUG(1,("ndr_push_error(%u): %s\n", ndr_err, s));
438
439 free(s);
440
441 return ndr_err;
442 }
443
444 /*
445 handle subcontext buffers, which in midl land are user-marshalled, but
446 we use magic in pidl to make them easier to cope with
447 */
448 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_start(struct ndr_pull *ndr,
449 struct ndr_pull **_subndr,
450 size_t header_size,
451 ssize_t size_is)
452 {
453 struct ndr_pull *subndr;
454 uint32_t r_content_size;
455 bool force_le = false;
456 bool force_be = false;
457
458 switch (header_size) {
459 case 0: {
460 uint32_t content_size = ndr->data_size - ndr->offset;
461 if (size_is >= 0) {
462 content_size = size_is;
463 }
464 r_content_size = content_size;
465 break;
466 }
467
468 case 2: {
469 uint16_t content_size;
470 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &content_size));
471 if (size_is >= 0 && size_is != content_size) {
472 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
473 (int)size_is, (int)content_size);
474 }
475 r_content_size = content_size;
476 break;
477 }
478
479 case 4: {
480 uint32_t content_size;
481 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &content_size));
482 if (size_is >= 0 && size_is != content_size) {
483 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
484 (int)size_is, (int)content_size);
485 }
486 r_content_size = content_size;
487 break;
488 }
489 case 0xFFFFFC01: {
490 /*
491 * Common Type Header for the Serialization Stream
492 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
493 */
494 uint8_t version;
495 uint8_t drep;
496 uint16_t hdrlen;
497 uint32_t filler;
498 uint32_t content_size;
499 uint32_t reserved;
500
501 /* version */
502 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &version));
503
504 if (version != 1) {
505 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
506 "Bad subcontext (PULL) Common Type Header version %d != 1",
507 (int)version);
508 }
509
510 /*
511 * 0x10 little endian
512 * 0x00 big endian
513 */
514 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &drep));
515 if (drep == 0x10) {
516 force_le = true;
517 } else if (drep == 0x00) {
518 force_be = true;
519 } else {
520 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
521 "Bad subcontext (PULL) Common Type Header invalid drep 0x%02X",
522 (unsigned int)drep);
523 }
524
525 /* length of the "Private Header for Constructed Type" */
526 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &hdrlen));
527 if (hdrlen != 8) {
528 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
529 "Bad subcontext (PULL) Common Type Header length %d != 8",
530 (int)hdrlen);
531 }
532
533 /* filler should be ignored */
534 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &filler));
535
536 /*
537 * Private Header for Constructed Type
538 */
539 /* length - will be updated latter */
540 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
541 if (size_is >= 0 && size_is != content_size) {
542 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
543 (int)size_is, (int)content_size);
544 }
545 /* the content size must be a multiple of 8 */
546 if ((content_size % 8) != 0) {
547 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
548 "Bad subcontext (PULL) size_is(%d) not padded to 8 content_size %d",
549 (int)size_is, (int)content_size);
550 }
551 r_content_size = content_size;
552
553 /* reserved */
554 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &reserved));
555 break;
556 }
557 default:
558 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) header_size %d",
559 (int)header_size);
560 }
561
562 NDR_PULL_NEED_BYTES(ndr, r_content_size);
563
564 subndr = talloc_zero(ndr, struct ndr_pull);
565 NDR_ERR_HAVE_NO_MEMORY(subndr);
566 subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
567 subndr->current_mem_ctx = ndr->current_mem_ctx;
568
569 subndr->data = ndr->data + ndr->offset;
570 subndr->offset = 0;
571 subndr->data_size = r_content_size;
572
573 if (force_le) {
574 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_LITTLE_ENDIAN);
575 } else if (force_be) {
576 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_BIGENDIAN);
577 }
578
579 *_subndr = subndr;
580 return NDR_ERR_SUCCESS;
581 }
582
583 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_end(struct ndr_pull *ndr,
584 struct ndr_pull *subndr,
585 size_t header_size,
586 ssize_t size_is)
587 {
588 uint32_t advance;
589 if (size_is >= 0) {
590 advance = size_is;
591 } else if (header_size > 0) {
592 advance = subndr->data_size;
593 } else {
594 advance = subndr->offset;
595 }
596 NDR_CHECK(ndr_pull_advance(ndr, advance));
597 return NDR_ERR_SUCCESS;
598 }
599
600 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_start(struct ndr_push *ndr,
601 struct ndr_push **_subndr,
602 size_t header_size,
603 ssize_t size_is)
604 {
605 struct ndr_push *subndr;
606
607 subndr = ndr_push_init_ctx(ndr);
608 NDR_ERR_HAVE_NO_MEMORY(subndr);
609 subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
610
611 if (size_is > 0) {
612 NDR_CHECK(ndr_push_zero(subndr, size_is));
613 subndr->offset = 0;
614 subndr->relative_end_offset = size_is;
615 }
616
617 *_subndr = subndr;
618 return NDR_ERR_SUCCESS;
619 }
620
621 /*
622 push a subcontext header
623 */
624 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_end(struct ndr_push *ndr,
625 struct ndr_push *subndr,
626 size_t header_size,
627 ssize_t size_is)
628 {
629 ssize_t padding_len;
630
631 if (size_is >= 0) {
632 padding_len = size_is - subndr->offset;
633 if (padding_len < 0) {
634 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PUSH) content_size %d is larger than size_is(%d)",
635 (int)subndr->offset, (int)size_is);
636 }
637 subndr->offset = size_is;
638 }
639
640 switch (header_size) {
641 case 0:
642 break;
643
644 case 2:
645 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, subndr->offset));
646 break;
647
648 case 4:
649 NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, subndr->offset));
650 break;
651
652 case 0xFFFFFC01:
653 /*
654 * Common Type Header for the Serialization Stream
655 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
656 */
657 padding_len = NDR_ROUND(subndr->offset, 8) - subndr->offset;
658 if (padding_len > 0) {
659 NDR_CHECK(ndr_push_zero(subndr, padding_len));
660 }
661
662 /* version */
663 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, 1));
664
665 /*
666 * 0x10 little endian
667 * 0x00 big endian
668 */
669 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, NDR_BE(ndr)?0x00:0x10));
670
671 /* length of the "Private Header for Constructed Type" */
672 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 8));
673
674 /* filler */
675 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0xCCCCCCCC));
676
677 /*
678 * Private Header for Constructed Type
679 */
680 /* length - will be updated latter */
681 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
682
683 /* reserved */
684 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
685 break;
686
687 default:
688 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext header size %d",
689 (int)header_size);
690 }
691
692 NDR_CHECK(ndr_push_bytes(ndr, subndr->data, subndr->offset));
693 return NDR_ERR_SUCCESS;
694 }
695
696 /*
697 store a token in the ndr context, for later retrieval
698 */
699 _PUBLIC_ enum ndr_err_code ndr_token_store(TALLOC_CTX *mem_ctx,
700 struct ndr_token_list **list,
701 const void *key,
702 uint32_t value)
703 {
704 struct ndr_token_list *tok;
705 tok = talloc(mem_ctx, struct ndr_token_list);
706 NDR_ERR_HAVE_NO_MEMORY(tok);
707 tok->key = key;
708 tok->value = value;
709 DLIST_ADD((*list), tok);
710 return NDR_ERR_SUCCESS;
711 }
712
713 /*
714 retrieve a token from a ndr context, using cmp_fn to match the tokens
715 */
716 _PUBLIC_ enum ndr_err_code ndr_token_retrieve_cmp_fn(struct ndr_token_list **list, const void *key, uint32_t *v,
717 comparison_fn_t _cmp_fn, bool _remove_tok)
718 {
719 struct ndr_token_list *tok;
720 for (tok=*list;tok;tok=tok->next) {
721 if (_cmp_fn && _cmp_fn(tok->key,key)==0) goto found;
722 else if (!_cmp_fn && tok->key == key) goto found;
723 }
724 return NDR_ERR_TOKEN;
725 found:
726 *v = tok->value;
727 if (_remove_tok) {
728 DLIST_REMOVE((*list), tok);
729 talloc_free(tok);
730 }
731 return NDR_ERR_SUCCESS;
732 }
733
734 /*
735 retrieve a token from a ndr context
736 */
737 _PUBLIC_ enum ndr_err_code ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
738 {
739 return ndr_token_retrieve_cmp_fn(list, key, v, NULL, true);
740 }
741
742 /*
743 peek at but don't removed a token from a ndr context
744 */
745 _PUBLIC_ uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
746 {
747 enum ndr_err_code status;
748 uint32_t v;
749
750 status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, false);
751 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
752 return 0;
753 }
754
755 return v;
756 }
757
758 /*
759 pull an array size field and add it to the array_size_list token list
760 */
761 _PUBLIC_ enum ndr_err_code ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
762 {
763 uint32_t size;
764 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &size));
765 return ndr_token_store(ndr, &ndr->array_size_list, p, size);
766 }
767
768 /*
769 get the stored array size field
770 */
771 _PUBLIC_ uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p)
772 {
773 return ndr_token_peek(&ndr->array_size_list, p);
774 }
775
776 /*
777 check the stored array size field
778 */
779 _PUBLIC_ enum ndr_err_code ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size)
780 {
781 uint32_t stored;
782 stored = ndr_token_peek(&ndr->array_size_list, p);
783 if (stored != size) {
784 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
785 "Bad array size - got %u expected %u\n",
786 stored, size);
787 }
788 return NDR_ERR_SUCCESS;
789 }
790
791 /*
792 pull an array length field and add it to the array_length_list token list
793 */
794 _PUBLIC_ enum ndr_err_code ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
795 {
796 uint32_t length, offset;
797 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &offset));
798 if (offset != 0) {
799 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
800 "non-zero array offset %u\n", offset);
801 }
802 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &length));
803 return ndr_token_store(ndr, &ndr->array_length_list, p, length);
804 }
805
806 /*
807 get the stored array length field
808 */
809 _PUBLIC_ uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p)
810 {
811 return ndr_token_peek(&ndr->array_length_list, p);
812 }
813
814 /*
815 check the stored array length field
816 */
817 _PUBLIC_ enum ndr_err_code ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
818 {
819 uint32_t stored;
820 stored = ndr_token_peek(&ndr->array_length_list, p);
821 if (stored != length) {
822 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
823 "Bad array length - got %u expected %u\n",
824 stored, length);
825 }
826 return NDR_ERR_SUCCESS;
827 }
828
829 _PUBLIC_ enum ndr_err_code ndr_push_pipe_chunk_trailer(struct ndr_push *ndr, int ndr_flags, uint32_t count)
830 {
831 if (ndr->flags & LIBNDR_FLAG_NDR64) {
832 int64_t tmp = 0 - (int64_t)count;
833 uint64_t ncount = tmp;
834
835 NDR_CHECK(ndr_push_hyper(ndr, ndr_flags, ncount));
836 }
837
838 return NDR_ERR_SUCCESS;
839 }
840
841 _PUBLIC_ enum ndr_err_code ndr_check_pipe_chunk_trailer(struct ndr_pull *ndr, int ndr_flags, uint32_t count)
842 {
843 if (ndr->flags & LIBNDR_FLAG_NDR64) {
844 int64_t tmp = 0 - (int64_t)count;
845 uint64_t ncount1 = tmp;
846 uint64_t ncount2;
847
848 NDR_CHECK(ndr_pull_hyper(ndr, ndr_flags, &ncount2));
849 if (ncount1 == ncount2) {
850 return NDR_ERR_SUCCESS;
851 }
852
853 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
854 "Bad pipe trailer[%lld should be %lld] size was %lu\"",
855 (unsigned long long)ncount2,
856 (unsigned long long)ncount1,
857 (unsigned long)count);
858 }
859
860 return NDR_ERR_SUCCESS;
861 }
862
863 /*
864 store a switch value
865 */
866 _PUBLIC_ enum ndr_err_code ndr_push_set_switch_value(struct ndr_push *ndr, const void *p, uint32_t val)
867 {
868 return ndr_token_store(ndr, &ndr->switch_list, p, val);
869 }
870
871 _PUBLIC_ enum ndr_err_code ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val)
872 {
873 return ndr_token_store(ndr, &ndr->switch_list, p, val);
874 }
875
876 _PUBLIC_ enum ndr_err_code ndr_print_set_switch_value(struct ndr_print *ndr, const void *p, uint32_t val)
877 {
878 return ndr_token_store(ndr, &ndr->switch_list, p, val);
879 }
880
881 /*
882 retrieve a switch value
883 */
884 _PUBLIC_ uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p)
885 {
886 return ndr_token_peek(&ndr->switch_list, p);
887 }
888
889 _PUBLIC_ uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p)
890 {
891 return ndr_token_peek(&ndr->switch_list, p);
892 }
893
894 _PUBLIC_ uint32_t ndr_print_get_switch_value(struct ndr_print *ndr, const void *p)
895 {
896 return ndr_token_peek(&ndr->switch_list, p);
897 }
898
899 /*
900 pull a struct from a blob using NDR
901 */
902 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
903 ndr_pull_flags_fn_t fn)
904 {
905 struct ndr_pull *ndr;
906 ndr = ndr_pull_init_blob(blob, mem_ctx);
907 NDR_ERR_HAVE_NO_MEMORY(ndr);
908 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
909 talloc_free(ndr);
910 return NDR_ERR_SUCCESS;
911 }
912
913 /*
914 pull a struct from a blob using NDR - failing if all bytes are not consumed
915 */
916 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
917 void *p, 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);
922 NDR_ERR_HAVE_NO_MEMORY(ndr);
923 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
924 if (ndr->offset > ndr->relative_highest_offset) {
925 highest_ofs = ndr->offset;
926 } else {
927 highest_ofs = ndr->relative_highest_offset;
928 }
929 if (highest_ofs < ndr->data_size) {
930 enum ndr_err_code ret;
931 ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
932 "not all bytes consumed ofs[%u] size[%u]",
933 highest_ofs, ndr->data_size);
934 talloc_free(ndr);
935 return ret;
936 }
937 talloc_free(ndr);
938 return NDR_ERR_SUCCESS;
939 }
940
941 /*
942 pull a union from a blob using NDR, given the union discriminator
943 */
944 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
945 void *p,
946 uint32_t level, ndr_pull_flags_fn_t fn)
947 {
948 struct ndr_pull *ndr;
949 ndr = ndr_pull_init_blob(blob, mem_ctx);
950 NDR_ERR_HAVE_NO_MEMORY(ndr);
951 NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
952 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
953 talloc_free(ndr);
954 return NDR_ERR_SUCCESS;
955 }
956
957 /*
958 pull a union from a blob using NDR, given the union discriminator,
959 failing if all bytes are not consumed
960 */
961 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
962 void *p,
963 uint32_t level, ndr_pull_flags_fn_t fn)
964 {
965 struct ndr_pull *ndr;
966 uint32_t highest_ofs;
967 ndr = ndr_pull_init_blob(blob, mem_ctx);
968 NDR_ERR_HAVE_NO_MEMORY(ndr);
969 NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
970 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
971 if (ndr->offset > ndr->relative_highest_offset) {
972 highest_ofs = ndr->offset;
973 } else {
974 highest_ofs = ndr->relative_highest_offset;
975 }
976 if (highest_ofs < ndr->data_size) {
977 enum ndr_err_code ret;
978 ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
979 "not all bytes consumed ofs[%u] size[%u]",
980 highest_ofs, ndr->data_size);
981 talloc_free(ndr);
982 return ret;
983 }
984 talloc_free(ndr);
985 return NDR_ERR_SUCCESS;
986 }
987
988 /*
989 push a struct to a blob using NDR
990 */
991 _PUBLIC_ enum ndr_err_code ndr_push_struct_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, const void *p, ndr_push_flags_fn_t fn)
992 {
993 struct ndr_push *ndr;
994 ndr = ndr_push_init_ctx(mem_ctx);
995 NDR_ERR_HAVE_NO_MEMORY(ndr);
996
997 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
998
999 *blob = ndr_push_blob(ndr);
1000 talloc_steal(mem_ctx, blob->data);
1001 talloc_free(ndr);
1002
1003 return NDR_ERR_SUCCESS;
1004 }
1005
1006 /*
1007 push a union to a blob using NDR
1008 */
1009 _PUBLIC_ enum ndr_err_code ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
1010 uint32_t level, ndr_push_flags_fn_t fn)
1011 {
1012 struct ndr_push *ndr;
1013 ndr = ndr_push_init_ctx(mem_ctx);
1014 NDR_ERR_HAVE_NO_MEMORY(ndr);
1015
1016 NDR_CHECK(ndr_push_set_switch_value(ndr, p, level));
1017 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
1018
1019 *blob = ndr_push_blob(ndr);
1020 talloc_steal(mem_ctx, blob->data);
1021 talloc_free(ndr);
1022
1023 return NDR_ERR_SUCCESS;
1024 }
1025
1026 /*
1027 generic ndr_size_*() handler for structures
1028 */
1029 _PUBLIC_ size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push)
1030 {
1031 struct ndr_push *ndr;
1032 enum ndr_err_code status;
1033 size_t ret;
1034
1035 /* avoid recursion */
1036 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
1037
1038 ndr = ndr_push_init_ctx(NULL);
1039 if (!ndr) return 0;
1040 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
1041 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, discard_const(p));
1042 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1043 talloc_free(ndr);
1044 return 0;
1045 }
1046 ret = ndr->offset;
1047 talloc_free(ndr);
1048 return ret;
1049 }
1050
1051 /*
1052 generic ndr_size_*() handler for unions
1053 */
1054 _PUBLIC_ size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push)
1055 {
1056 struct ndr_push *ndr;
1057 enum ndr_err_code status;
1058 size_t ret;
1059
1060 /* avoid recursion */
1061 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
1062
1063 ndr = ndr_push_init_ctx(NULL);
1064 if (!ndr) return 0;
1065 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
1066
1067 status = ndr_push_set_switch_value(ndr, p, level);
1068 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1069 talloc_free(ndr);
1070 return 0;
1071 }
1072 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
1073 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1074 talloc_free(ndr);
1075 return 0;
1076 }
1077 ret = ndr->offset;
1078 talloc_free(ndr);
1079 return ret;
1080 }
1081
1082 /*
1083 get the current base for relative pointers for the push
1084 */
1085 _PUBLIC_ uint32_t ndr_push_get_relative_base_offset(struct ndr_push *ndr)
1086 {
1087 return ndr->relative_base_offset;
1088 }
1089
1090 /*
1091 restore the old base for relative pointers for the push
1092 */
1093 _PUBLIC_ void ndr_push_restore_relative_base_offset(struct ndr_push *ndr, uint32_t offset)
1094 {
1095 ndr->relative_base_offset = offset;
1096 }
1097
1098 /*
1099 setup the current base for relative pointers for the push
1100 called in the NDR_SCALAR stage
1101 */
1102 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset1(struct ndr_push *ndr, const void *p, uint32_t offset)
1103 {
1104 ndr->relative_base_offset = offset;
1105 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1106 }
1107
1108 /*
1109 setup the current base for relative pointers for the push
1110 called in the NDR_BUFFERS stage
1111 */
1112 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset2(struct ndr_push *ndr, const void *p)
1113 {
1114 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1115 }
1116
1117 /*
1118 push a relative object - stage1
1119 this is called during SCALARS processing
1120 */
1121 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p)
1122 {
1123 if (p == NULL) {
1124 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
1125 return NDR_ERR_SUCCESS;
1126 }
1127 NDR_CHECK(ndr_push_align(ndr, 4));
1128 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1129 return ndr_push_uint32(ndr, NDR_SCALARS, 0xFFFFFFFF);
1130 }
1131
1132 /*
1133 push a short relative object - stage1
1134 this is called during SCALARS processing
1135 */
1136 _PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr1(struct ndr_push *ndr, const void *p)
1137 {
1138 if (p == NULL) {
1139 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 0));
1140 return NDR_ERR_SUCCESS;
1141 }
1142 NDR_CHECK(ndr_push_align(ndr, 2));
1143 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1144 return ndr_push_uint16(ndr, NDR_SCALARS, 0xFFFF);
1145 }
1146 /*
1147 push a relative object - stage2
1148 this is called during buffers processing
1149 */
1150 static enum ndr_err_code ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p)
1151 {
1152 uint32_t save_offset;
1153 uint32_t ptr_offset = 0xFFFFFFFF;
1154 if (p == NULL) {
1155 return NDR_ERR_SUCCESS;
1156 }
1157 save_offset = ndr->offset;
1158 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1159 if (ptr_offset > ndr->offset) {
1160 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1161 "ndr_push_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1162 ptr_offset, ndr->offset);
1163 }
1164 ndr->offset = ptr_offset;
1165 if (save_offset < ndr->relative_base_offset) {
1166 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1167 "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1168 save_offset, ndr->relative_base_offset);
1169 }
1170 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1171 ndr->offset = save_offset;
1172 return NDR_ERR_SUCCESS;
1173 }
1174 /*
1175 push a short relative object - stage2
1176 this is called during buffers processing
1177 */
1178 _PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr2(struct ndr_push *ndr, const void *p)
1179 {
1180 uint32_t save_offset;
1181 uint32_t ptr_offset = 0xFFFF;
1182 if (p == NULL) {
1183 return NDR_ERR_SUCCESS;
1184 }
1185 save_offset = ndr->offset;
1186 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1187 if (ptr_offset > ndr->offset) {
1188 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1189 "ndr_push_short_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1190 ptr_offset, ndr->offset);
1191 }
1192 ndr->offset = ptr_offset;
1193 if (save_offset < ndr->relative_base_offset) {
1194 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1195 "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1196 save_offset, ndr->relative_base_offset);
1197 }
1198 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1199 ndr->offset = save_offset;
1200 return NDR_ERR_SUCCESS;
1201 }
1202
1203 /*
1204 push a relative object - stage2 start
1205 this is called during buffers processing
1206 */
1207 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_start(struct ndr_push *ndr, const void *p)
1208 {
1209 if (p == NULL) {
1210 return NDR_ERR_SUCCESS;
1211 }
1212 if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
1213 uint32_t relative_offset;
1214 size_t pad;
1215 size_t align = 1;
1216
1217 if (ndr->offset < ndr->relative_base_offset) {
1218 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1219 "ndr_push_relative_ptr2_start ndr->offset(%u) < ndr->relative_base_offset(%u)",
1220 ndr->offset, ndr->relative_base_offset);
1221 }
1222
1223 relative_offset = ndr->offset - ndr->relative_base_offset;
1224
1225 if (ndr->flags & LIBNDR_FLAG_NOALIGN) {
1226 align = 1;
1227 } else if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
1228 align = 2;
1229 } else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
1230 align = 4;
1231 } else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
1232 align = 8;
1233 }
1234
1235 pad = ndr_align_size(relative_offset, align);
1236 if (pad) {
1237 NDR_CHECK(ndr_push_zero(ndr, pad));
1238 }
1239
1240 return ndr_push_relative_ptr2(ndr, p);
1241 }
1242 if (ndr->relative_end_offset == -1) {
1243 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1244 "ndr_push_relative_ptr2_start RELATIVE_REVERSE flag set and relative_end_offset %d",
1245 ndr->relative_end_offset);
1246 }
1247 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_begin_list, p, ndr->offset));
1248 return NDR_ERR_SUCCESS;
1249 }
1250
1251 /*
1252 push a relative object - stage2 end
1253 this is called during buffers processing
1254 */
1255 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_end(struct ndr_push *ndr, const void *p)
1256 {
1257 uint32_t begin_offset = 0xFFFFFFFF;
1258 ssize_t len;
1259 uint32_t correct_offset = 0;
1260 uint32_t align = 1;
1261 uint32_t pad = 0;
1262
1263 if (p == NULL) {
1264 return NDR_ERR_SUCCESS;
1265 }
1266
1267 if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
1268 return NDR_ERR_SUCCESS;
1269 }
1270
1271 if (ndr->flags & LIBNDR_FLAG_NO_NDR_SIZE) {
1272 /* better say more than calculation a too small buffer */
1273 NDR_PUSH_ALIGN(ndr, 8);
1274 return NDR_ERR_SUCCESS;
1275 }
1276
1277 if (ndr->relative_end_offset < ndr->offset) {
1278 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1279 "ndr_push_relative_ptr2_end:"
1280 "relative_end_offset %u < offset %u",
1281 ndr->relative_end_offset, ndr->offset);
1282 }
1283
1284 NDR_CHECK(ndr_token_retrieve(&ndr->relative_begin_list, p, &begin_offset));
1285
1286 /* we have marshalled a buffer, see how long it was */
1287 len = ndr->offset - begin_offset;
1288
1289 if (len < 0) {
1290 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1291 "ndr_push_relative_ptr2_end:"
1292 "offset %u - begin_offset %u < 0",
1293 ndr->offset, begin_offset);
1294 }
1295
1296 if (ndr->relative_end_offset < len) {
1297 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1298 "ndr_push_relative_ptr2_end:"
1299 "relative_end_offset %u < len %lld",
1300 ndr->offset, (long long)len);
1301 }
1302
1303 /* the reversed offset is at the end of the main buffer */
1304 correct_offset = ndr->relative_end_offset - len;
1305
1306 if (ndr->flags & LIBNDR_FLAG_NOALIGN) {
1307 align = 1;
1308 } else if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
1309 align = 2;
1310 } else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
1311 align = 4;
1312 } else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
1313 align = 8;
1314 }
1315
1316 pad = ndr_align_size(correct_offset, align);
1317 if (pad) {
1318 correct_offset += pad;
1319 correct_offset -= align;
1320 }
1321
1322 if (correct_offset < begin_offset) {
1323 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1324 "ndr_push_relative_ptr2_end: "
1325 "correct_offset %u < begin_offset %u",
1326 correct_offset, begin_offset);
1327 }
1328
1329 if (len > 0) {
1330 uint32_t clear_size = correct_offset - begin_offset;
1331
1332 clear_size = MIN(clear_size, len);
1333
1334 /* now move the marshalled buffer to the end of the main buffer */
1335 memmove(ndr->data + correct_offset, ndr->data + begin_offset, len);
1336
1337 if (clear_size) {
1338 /* and wipe out old buffer within the main buffer */
1339 memset(ndr->data + begin_offset, '\0', clear_size);
1340 }
1341 }
1342
1343 /* and set the end offset for the next buffer */
1344 ndr->relative_end_offset = correct_offset;
1345
1346 /* finally write the offset to the main buffer */
1347 ndr->offset = correct_offset;
1348 NDR_CHECK(ndr_push_relative_ptr2(ndr, p));
1349
1350 /* restore to where we were in the main buffer */
1351 ndr->offset = begin_offset;
1352
1353 return NDR_ERR_SUCCESS;
1354 }
1355
1356 /*
1357 get the current base for relative pointers for the pull
1358 */
1359 _PUBLIC_ uint32_t ndr_pull_get_relative_base_offset(struct ndr_pull *ndr)
1360 {
1361 return ndr->relative_base_offset;
1362 }
1363
1364 /*
1365 restore the old base for relative pointers for the pull
1366 */
1367 _PUBLIC_ void ndr_pull_restore_relative_base_offset(struct ndr_pull *ndr, uint32_t offset)
1368 {
1369 ndr->relative_base_offset = offset;
1370 }
1371
1372 /*
1373 setup the current base for relative pointers for the pull
1374 called in the NDR_SCALAR stage
1375 */
1376 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset1(struct ndr_pull *ndr, const void *p, uint32_t offset)
1377 {
1378 ndr->relative_base_offset = offset;
1379 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1380 }
1381
1382 /*
1383 setup the current base for relative pointers for the pull
1384 called in the NDR_BUFFERS stage
1385 */
1386 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset2(struct ndr_pull *ndr, const void *p)
1387 {
1388 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1389 }
1390
1391 /*
1392 pull a relative object - stage1
1393 called during SCALARS processing
1394 */
1395 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset)
1396 {
1397 rel_offset += ndr->relative_base_offset;
1398 if (rel_offset > ndr->data_size) {
1399 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
1400 "ndr_pull_relative_ptr1 rel_offset(%u) > ndr->data_size(%u)",
1401 rel_offset, ndr->data_size);
1402 }
1403 return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
1404 }
1405
1406 /*
1407 pull a relative object - stage2
1408 called during BUFFERS processing
1409 */
1410 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr2(struct ndr_pull *ndr, const void *p)
1411 {
1412 uint32_t rel_offset;
1413 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset));
1414 return ndr_pull_set_offset(ndr, rel_offset);
1415 }
1416
1417 const static struct {
1418 enum ndr_err_code err;
1419 const char *string;
1420 } ndr_err_code_strings[] = {
1421 { NDR_ERR_SUCCESS, "Success" },
1422 { NDR_ERR_ARRAY_SIZE, "Bad Array Size" },
1423 { NDR_ERR_BAD_SWITCH, "Bad Switch" },
1424 { NDR_ERR_OFFSET, "Offset Error" },
1425 { NDR_ERR_RELATIVE, "Relative Pointer Error" },
1426 { NDR_ERR_CHARCNV, "Character Conversion Error" },
1427 { NDR_ERR_LENGTH, "Length Error" },
1428 { NDR_ERR_SUBCONTEXT, "Subcontext Error" },
1429 { NDR_ERR_COMPRESSION, "Compression Error" },
1430 { NDR_ERR_STRING, "String Error" },
1431 { NDR_ERR_VALIDATE, "Validate Error" },
1432 { NDR_ERR_BUFSIZE, "Buffer Size Error" },
1433 { NDR_ERR_ALLOC, "Allocation Error" },
1434 { NDR_ERR_RANGE, "Range Error" },
1435 { NDR_ERR_TOKEN, "Token Error" },
1436 { NDR_ERR_IPV4ADDRESS, "IPv4 Address Error" },
1437 { NDR_ERR_INVALID_POINTER, "Invalid Pointer" },
1438 { NDR_ERR_UNREAD_BYTES, "Unread Bytes" },
1439 { NDR_ERR_NDR64, "NDR64 assertion error" },
1440 { 0, NULL }
1441 };
1442
1443 _PUBLIC_ const char *ndr_map_error2string(enum ndr_err_code ndr_err)
1444 {
1445 int i;
1446 for (i = 0; ndr_err_code_strings[i].string != NULL; i++) {
1447 if (ndr_err_code_strings[i].err == ndr_err)
1448 return ndr_err_code_strings[i].string;
1449 }
1450 return "Unknown error";
1451 }
reg import