2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2003
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.
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.
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/>.
23 this provides the core routines for NDR parsing functions
25 see http://www.opengroup.org/onlinepubs/9629399/chap14.htm for details
30 #include "librpc/ndr/libndr.h"
31 #include "../lib/util/dlinklist.h"
32 #if _SAMBA_BUILD_ == 4
33 #include "param/param.h"
36 #define NDR_BASE_MARSHALL_SIZE 1024
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} },
44 const struct ndr_syntax_id ndr64_transfer_syntax = {
45 { 0x71710533, 0xbeba, 0x4937, {0x83, 0x19}, {0xb5,0xdb,0xef,0x9c,0xcc,0x36} },
50 work out the number of bytes needed to align on a n byte boundary
52 _PUBLIC_ size_t ndr_align_size(uint32_t offset, size_t n)
54 if ((offset & (n-1)) == 0) return 0;
55 return n - (offset & (n-1));
59 initialise a ndr parse structure from a data blob
61 _PUBLIC_ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience)
65 ndr = talloc_zero(mem_ctx, struct ndr_pull);
66 if (!ndr) return NULL;
67 ndr->current_mem_ctx = mem_ctx;
69 ndr->data = blob->data;
70 ndr->data_size = blob->length;
71 ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
77 advance by 'size' bytes
79 _PUBLIC_ enum ndr_err_code ndr_pull_advance(struct ndr_pull *ndr, uint32_t size)
82 if (ndr->offset > ndr->data_size) {
83 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
84 "ndr_pull_advance by %u failed",
87 return NDR_ERR_SUCCESS;
91 set the parse offset to 'ofs'
93 static enum ndr_err_code ndr_pull_set_offset(struct ndr_pull *ndr, uint32_t ofs)
96 if (ndr->offset > ndr->data_size) {
97 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
98 "ndr_pull_set_offset %u failed",
101 return NDR_ERR_SUCCESS;
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)
107 struct ndr_push *ndr;
109 ndr = talloc_zero(mem_ctx, struct ndr_push);
115 ndr->alloc_size = NDR_BASE_MARSHALL_SIZE;
116 ndr->data = talloc_array(ndr, uint8_t, ndr->alloc_size);
120 ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
125 /* return a DATA_BLOB structure for the current ndr_push marshalled data */
126 _PUBLIC_ DATA_BLOB ndr_push_blob(struct ndr_push *ndr)
129 blob = data_blob_const(ndr->data, ndr->offset);
130 if (ndr->alloc_size > ndr->offset) {
131 ndr->data[ndr->offset] = 0;
138 expand the available space in the buffer to ndr->offset + extra_size
140 _PUBLIC_ enum ndr_err_code ndr_push_expand(struct ndr_push *ndr, uint32_t extra_size)
142 uint32_t size = extra_size + ndr->offset;
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",
150 if (ndr->alloc_size > size) {
151 return NDR_ERR_SUCCESS;
154 ndr->alloc_size += NDR_BASE_MARSHALL_SIZE;
155 if (size+1 > ndr->alloc_size) {
156 ndr->alloc_size = size+1;
158 ndr->data = talloc_realloc(ndr, ndr->data, uint8_t, ndr->alloc_size);
160 return ndr_push_error(ndr, NDR_ERR_ALLOC, "Failed to push_expand to %u",
164 return NDR_ERR_SUCCESS;
167 _PUBLIC_ void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...)
173 va_start(ap, format);
174 ret = vasprintf(&s, format, ap);
181 for (i=0;i<ndr->depth;i++) {
185 DEBUGADD(0,("%s\n", s));
189 _PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...)
194 for (i=0;i<ndr->depth;i++) {
195 ndr->private_data = talloc_asprintf_append_buffer(
196 (char *)ndr->private_data, " ");
199 va_start(ap, format);
200 ndr->private_data = talloc_vasprintf_append_buffer((char *)ndr->private_data,
203 ndr->private_data = talloc_asprintf_append_buffer((char *)ndr->private_data,
208 a useful helper function for printing idl structures via DEBUG()
210 _PUBLIC_ void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr)
212 struct ndr_print *ndr;
214 ndr = talloc_zero(NULL, struct ndr_print);
216 ndr->print = ndr_print_debug_helper;
224 a useful helper function for printing idl unions via DEBUG()
226 _PUBLIC_ void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
228 struct ndr_print *ndr;
230 ndr = talloc_zero(NULL, struct ndr_print);
232 ndr->print = ndr_print_debug_helper;
235 ndr_print_set_switch_value(ndr, ptr, level);
241 a useful helper function for printing idl function calls via DEBUG()
243 _PUBLIC_ void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
245 struct ndr_print *ndr;
247 ndr = talloc_zero(NULL, struct ndr_print);
249 ndr->print = ndr_print_debug_helper;
252 fn(ndr, name, flags, ptr);
257 a useful helper function for printing idl structures to a string
259 _PUBLIC_ char *ndr_print_struct_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, void *ptr)
261 struct ndr_print *ndr;
264 ndr = talloc_zero(mem_ctx, struct ndr_print);
265 if (!ndr) return NULL;
266 ndr->private_data = talloc_strdup(ndr, "");
267 if (!ndr->private_data) {
270 ndr->print = ndr_print_string_helper;
274 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
281 a useful helper function for printing idl unions to a string
283 _PUBLIC_ char *ndr_print_union_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
285 struct ndr_print *ndr;
288 ndr = talloc_zero(mem_ctx, struct ndr_print);
289 if (!ndr) return NULL;
290 ndr->private_data = talloc_strdup(ndr, "");
291 if (!ndr->private_data) {
294 ndr->print = ndr_print_string_helper;
297 ndr_print_set_switch_value(ndr, ptr, level);
299 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
306 a useful helper function for printing idl function calls to a string
308 _PUBLIC_ char *ndr_print_function_string(TALLOC_CTX *mem_ctx,
309 ndr_print_function_t fn, const char *name,
310 int flags, void *ptr)
312 struct ndr_print *ndr;
315 ndr = talloc_zero(mem_ctx, struct ndr_print);
316 if (!ndr) return NULL;
317 ndr->private_data = talloc_strdup(ndr, "");
318 if (!ndr->private_data) {
321 ndr->print = ndr_print_string_helper;
324 fn(ndr, name, flags, ptr);
325 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
331 _PUBLIC_ void ndr_set_flags(uint32_t *pflags, uint32_t new_flags)
333 /* the big/little endian flags are inter-dependent */
334 if (new_flags & LIBNDR_FLAG_LITTLE_ENDIAN) {
335 (*pflags) &= ~LIBNDR_FLAG_BIGENDIAN;
337 if (new_flags & LIBNDR_FLAG_BIGENDIAN) {
338 (*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN;
340 if (new_flags & LIBNDR_FLAG_REMAINING) {
341 (*pflags) &= ~LIBNDR_ALIGN_FLAGS;
343 if (new_flags & LIBNDR_ALIGN_FLAGS) {
344 (*pflags) &= ~LIBNDR_FLAG_REMAINING;
346 (*pflags) |= new_flags;
350 return and possibly log an NDR error
352 _PUBLIC_ enum ndr_err_code ndr_pull_error(struct ndr_pull *ndr,
353 enum ndr_err_code ndr_err,
354 const char *format, ...)
360 va_start(ap, format);
361 ret = vasprintf(&s, format, ap);
365 return NDR_ERR_ALLOC;
368 DEBUG(1,("ndr_pull_error(%u): %s\n", ndr_err, s));
376 return and possibly log an NDR error
378 _PUBLIC_ enum ndr_err_code ndr_push_error(struct ndr_push *ndr,
379 enum ndr_err_code ndr_err,
380 const char *format, ...)
386 va_start(ap, format);
387 ret = vasprintf(&s, format, ap);
391 return NDR_ERR_ALLOC;
394 DEBUG(1,("ndr_push_error(%u): %s\n", ndr_err, s));
402 handle subcontext buffers, which in midl land are user-marshalled, but
403 we use magic in pidl to make them easier to cope with
405 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_start(struct ndr_pull *ndr,
406 struct ndr_pull **_subndr,
410 struct ndr_pull *subndr;
411 uint32_t r_content_size;
412 bool force_le = false;
413 bool force_be = false;
415 switch (header_size) {
417 uint32_t content_size = ndr->data_size - ndr->offset;
419 content_size = size_is;
421 r_content_size = content_size;
426 uint16_t content_size;
427 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &content_size));
428 if (size_is >= 0 && size_is != content_size) {
429 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
430 (int)size_is, (int)content_size);
432 r_content_size = content_size;
437 uint32_t content_size;
438 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
439 if (size_is >= 0 && size_is != content_size) {
440 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
441 (int)size_is, (int)content_size);
443 r_content_size = content_size;
448 * Common Type Header for the Serialization Stream
449 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
455 uint32_t content_size;
459 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &version));
462 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
463 "Bad subcontext (PULL) Common Type Header version %d != 1",
471 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &drep));
474 } else if (drep == 0x00) {
477 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
478 "Bad subcontext (PULL) Common Type Header invalid drep 0x%02X",
482 /* length of the "Private Header for Constructed Type" */
483 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &hdrlen));
485 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
486 "Bad subcontext (PULL) Common Type Header length %d != 8",
490 /* filler should be ignored */
491 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &filler));
494 * Private Header for Constructed Type
496 /* length - will be updated latter */
497 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
498 if (size_is >= 0 && size_is != content_size) {
499 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
500 (int)size_is, (int)content_size);
502 /* the content size must be a multiple of 8 */
503 if ((content_size % 8) != 0) {
504 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
505 "Bad subcontext (PULL) size_is(%d) not padded to 8 content_size %d",
506 (int)size_is, (int)content_size);
508 r_content_size = content_size;
511 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &reserved));
515 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) header_size %d",
519 NDR_PULL_NEED_BYTES(ndr, r_content_size);
521 subndr = talloc_zero(ndr, struct ndr_pull);
522 NDR_ERR_HAVE_NO_MEMORY(subndr);
523 subndr->flags = ndr->flags;
524 subndr->current_mem_ctx = ndr->current_mem_ctx;
526 subndr->data = ndr->data + ndr->offset;
528 subndr->data_size = r_content_size;
529 subndr->iconv_convenience = talloc_reference(subndr, ndr->iconv_convenience);
532 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_LITTLE_ENDIAN);
533 } else if (force_be) {
534 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_BIGENDIAN);
538 return NDR_ERR_SUCCESS;
541 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_end(struct ndr_pull *ndr,
542 struct ndr_pull *subndr,
549 } else if (header_size > 0) {
550 advance = subndr->data_size;
552 advance = subndr->offset;
554 NDR_CHECK(ndr_pull_advance(ndr, advance));
555 return NDR_ERR_SUCCESS;
558 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_start(struct ndr_push *ndr,
559 struct ndr_push **_subndr,
563 struct ndr_push *subndr;
565 subndr = ndr_push_init_ctx(ndr, ndr->iconv_convenience);
566 NDR_ERR_HAVE_NO_MEMORY(subndr);
567 subndr->flags = ndr->flags;
570 return NDR_ERR_SUCCESS;
574 push a subcontext header
576 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_end(struct ndr_push *ndr,
577 struct ndr_push *subndr,
584 padding_len = size_is - subndr->offset;
585 if (padding_len > 0) {
586 NDR_CHECK(ndr_push_zero(subndr, padding_len));
587 } else if (padding_len < 0) {
588 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PUSH) content_size %d is larger than size_is(%d)",
589 (int)subndr->offset, (int)size_is);
593 switch (header_size) {
598 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, subndr->offset));
602 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
607 * Common Type Header for the Serialization Stream
608 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
610 padding_len = NDR_ROUND(subndr->offset, 8) - subndr->offset;
611 if (padding_len > 0) {
612 NDR_CHECK(ndr_push_zero(subndr, padding_len));
616 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, 1));
622 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, NDR_BE(ndr)?0x00:0x10));
624 /* length of the "Private Header for Constructed Type" */
625 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 8));
628 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0xCCCCCCCC));
631 * Private Header for Constructed Type
633 /* length - will be updated latter */
634 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
637 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
641 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext header size %d",
645 NDR_CHECK(ndr_push_bytes(ndr, subndr->data, subndr->offset));
646 return NDR_ERR_SUCCESS;
650 store a token in the ndr context, for later retrieval
652 _PUBLIC_ enum ndr_err_code ndr_token_store(TALLOC_CTX *mem_ctx,
653 struct ndr_token_list **list,
657 struct ndr_token_list *tok;
658 tok = talloc(mem_ctx, struct ndr_token_list);
659 NDR_ERR_HAVE_NO_MEMORY(tok);
662 DLIST_ADD((*list), tok);
663 return NDR_ERR_SUCCESS;
667 retrieve a token from a ndr context, using cmp_fn to match the tokens
669 _PUBLIC_ enum ndr_err_code ndr_token_retrieve_cmp_fn(struct ndr_token_list **list, const void *key, uint32_t *v,
670 comparison_fn_t _cmp_fn, bool _remove_tok)
672 struct ndr_token_list *tok;
673 for (tok=*list;tok;tok=tok->next) {
674 if (_cmp_fn && _cmp_fn(tok->key,key)==0) goto found;
675 else if (!_cmp_fn && tok->key == key) goto found;
677 return NDR_ERR_TOKEN;
681 DLIST_REMOVE((*list), tok);
684 return NDR_ERR_SUCCESS;
688 retrieve a token from a ndr context
690 _PUBLIC_ enum ndr_err_code ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
692 return ndr_token_retrieve_cmp_fn(list, key, v, NULL, true);
696 peek at but don't removed a token from a ndr context
698 _PUBLIC_ uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
700 enum ndr_err_code status;
703 status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, false);
704 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
712 pull an array size field and add it to the array_size_list token list
714 _PUBLIC_ enum ndr_err_code ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
717 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &size));
718 return ndr_token_store(ndr, &ndr->array_size_list, p, size);
722 get the stored array size field
724 _PUBLIC_ uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p)
726 return ndr_token_peek(&ndr->array_size_list, p);
730 check the stored array size field
732 _PUBLIC_ enum ndr_err_code ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size)
735 stored = ndr_token_peek(&ndr->array_size_list, p);
736 if (stored != size) {
737 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
738 "Bad array size - got %u expected %u\n",
741 return NDR_ERR_SUCCESS;
745 pull an array length field and add it to the array_length_list token list
747 _PUBLIC_ enum ndr_err_code ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
749 uint32_t length, offset;
750 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &offset));
752 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
753 "non-zero array offset %u\n", offset);
755 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &length));
756 return ndr_token_store(ndr, &ndr->array_length_list, p, length);
760 get the stored array length field
762 _PUBLIC_ uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p)
764 return ndr_token_peek(&ndr->array_length_list, p);
768 check the stored array length field
770 _PUBLIC_ enum ndr_err_code ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
773 stored = ndr_token_peek(&ndr->array_length_list, p);
774 if (stored != length) {
775 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
776 "Bad array length - got %u expected %u\n",
779 return NDR_ERR_SUCCESS;
785 _PUBLIC_ enum ndr_err_code ndr_push_set_switch_value(struct ndr_push *ndr, const void *p, uint32_t val)
787 return ndr_token_store(ndr, &ndr->switch_list, p, val);
790 _PUBLIC_ enum ndr_err_code ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val)
792 return ndr_token_store(ndr, &ndr->switch_list, p, val);
795 _PUBLIC_ enum ndr_err_code ndr_print_set_switch_value(struct ndr_print *ndr, const void *p, uint32_t val)
797 return ndr_token_store(ndr, &ndr->switch_list, p, val);
801 retrieve a switch value
803 _PUBLIC_ uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p)
805 return ndr_token_peek(&ndr->switch_list, p);
808 _PUBLIC_ uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p)
810 return ndr_token_peek(&ndr->switch_list, p);
813 _PUBLIC_ uint32_t ndr_print_get_switch_value(struct ndr_print *ndr, const void *p)
815 return ndr_token_peek(&ndr->switch_list, p);
819 pull a struct from a blob using NDR
821 _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,
822 ndr_pull_flags_fn_t fn)
824 struct ndr_pull *ndr;
825 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
826 NDR_ERR_HAVE_NO_MEMORY(ndr);
827 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
828 return NDR_ERR_SUCCESS;
832 pull a struct from a blob using NDR - failing if all bytes are not consumed
834 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
835 struct smb_iconv_convenience *iconv_convenience,
836 void *p, ndr_pull_flags_fn_t fn)
838 struct ndr_pull *ndr;
839 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
840 NDR_ERR_HAVE_NO_MEMORY(ndr);
841 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
842 if (ndr->offset < ndr->data_size) {
843 return ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
844 "not all bytes consumed ofs[%u] size[%u]",
845 ndr->offset, ndr->data_size);
847 return NDR_ERR_SUCCESS;
851 pull a union from a blob using NDR, given the union discriminator
853 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
854 struct smb_iconv_convenience *iconv_convenience, void *p,
855 uint32_t level, ndr_pull_flags_fn_t fn)
857 struct ndr_pull *ndr;
858 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
859 NDR_ERR_HAVE_NO_MEMORY(ndr);
860 NDR_CHECK(ndr_pull_set_switch_value(ndr, p, level));
861 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
862 return NDR_ERR_SUCCESS;
866 pull a union from a blob using NDR, given the union discriminator,
867 failing if all bytes are not consumed
869 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
870 struct smb_iconv_convenience *iconv_convenience, void *p,
871 uint32_t level, ndr_pull_flags_fn_t fn)
873 struct ndr_pull *ndr;
874 ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
875 NDR_ERR_HAVE_NO_MEMORY(ndr);
876 NDR_CHECK(ndr_pull_set_switch_value(ndr, p, level));
877 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
878 if (ndr->offset < ndr->data_size) {
879 return ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
880 "not all bytes consumed ofs[%u] size[%u]",
881 ndr->offset, ndr->data_size);
883 return NDR_ERR_SUCCESS;
887 push a struct to a blob using NDR
889 _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)
891 struct ndr_push *ndr;
892 ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
893 NDR_ERR_HAVE_NO_MEMORY(ndr);
895 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
897 *blob = ndr_push_blob(ndr);
898 talloc_steal(mem_ctx, blob->data);
901 return NDR_ERR_SUCCESS;
905 push a union to a blob using NDR
907 _PUBLIC_ enum ndr_err_code ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, void *p,
908 uint32_t level, ndr_push_flags_fn_t fn)
910 struct ndr_push *ndr;
911 ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
912 NDR_ERR_HAVE_NO_MEMORY(ndr);
914 NDR_CHECK(ndr_push_set_switch_value(ndr, p, level));
915 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
917 *blob = ndr_push_blob(ndr);
918 talloc_steal(mem_ctx, blob->data);
921 return NDR_ERR_SUCCESS;
925 generic ndr_size_*() handler for structures
927 _PUBLIC_ size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push)
929 struct ndr_push *ndr;
930 enum ndr_err_code status;
933 /* avoid recursion */
934 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
936 ndr = ndr_push_init_ctx(NULL, global_iconv_convenience);
938 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
939 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, discard_const(p));
940 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
950 generic ndr_size_*() handler for unions
952 _PUBLIC_ size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push)
954 struct ndr_push *ndr;
955 enum ndr_err_code status;
958 /* avoid recursion */
959 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
961 ndr = ndr_push_init_ctx(NULL, global_iconv_convenience);
963 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
965 status = ndr_push_set_switch_value(ndr, p, level);
966 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
970 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
971 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
981 get the current base for relative pointers for the push
983 _PUBLIC_ uint32_t ndr_push_get_relative_base_offset(struct ndr_push *ndr)
985 return ndr->relative_base_offset;
989 restore the old base for relative pointers for the push
991 _PUBLIC_ void ndr_push_restore_relative_base_offset(struct ndr_push *ndr, uint32_t offset)
993 ndr->relative_base_offset = offset;
997 setup the current base for relative pointers for the push
998 called in the NDR_SCALAR stage
1000 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset1(struct ndr_push *ndr, const void *p, uint32_t offset)
1002 ndr->relative_base_offset = offset;
1003 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1007 setup the current base for relative pointers for the push
1008 called in the NDR_BUFFERS stage
1010 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset2(struct ndr_push *ndr, const void *p)
1012 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1016 push a relative object - stage1
1017 this is called during SCALARS processing
1019 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p)
1022 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
1023 return NDR_ERR_SUCCESS;
1025 NDR_CHECK(ndr_push_align(ndr, 4));
1026 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1027 return ndr_push_uint32(ndr, NDR_SCALARS, 0xFFFFFFFF);
1031 push a relative object - stage2
1032 this is called during buffers processing
1034 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p)
1036 uint32_t save_offset;
1037 uint32_t ptr_offset = 0xFFFFFFFF;
1039 return NDR_ERR_SUCCESS;
1041 save_offset = ndr->offset;
1042 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1043 if (ptr_offset > ndr->offset) {
1044 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1045 "ndr_push_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1046 ptr_offset, ndr->offset);
1048 ndr->offset = ptr_offset;
1049 if (save_offset < ndr->relative_base_offset) {
1050 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1051 "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1052 save_offset, ndr->relative_base_offset);
1054 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1055 ndr->offset = save_offset;
1056 return NDR_ERR_SUCCESS;
1060 get the current base for relative pointers for the pull
1062 _PUBLIC_ uint32_t ndr_pull_get_relative_base_offset(struct ndr_pull *ndr)
1064 return ndr->relative_base_offset;
1068 restore the old base for relative pointers for the pull
1070 _PUBLIC_ void ndr_pull_restore_relative_base_offset(struct ndr_pull *ndr, uint32_t offset)
1072 ndr->relative_base_offset = offset;
1076 setup the current base for relative pointers for the pull
1077 called in the NDR_SCALAR stage
1079 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset1(struct ndr_pull *ndr, const void *p, uint32_t offset)
1081 ndr->relative_base_offset = offset;
1082 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1086 setup the current base for relative pointers for the pull
1087 called in the NDR_BUFFERS stage
1089 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset2(struct ndr_pull *ndr, const void *p)
1091 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1095 pull a relative object - stage1
1096 called during SCALARS processing
1098 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset)
1100 rel_offset += ndr->relative_base_offset;
1101 if (rel_offset > ndr->data_size) {
1102 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
1103 "ndr_pull_relative_ptr1 rel_offset(%u) > ndr->data_size(%u)",
1104 rel_offset, ndr->data_size);
1106 return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
1110 pull a relative object - stage2
1111 called during BUFFERS processing
1113 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr2(struct ndr_pull *ndr, const void *p)
1115 uint32_t rel_offset;
1116 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset));
1117 return ndr_pull_set_offset(ndr, rel_offset);