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} },
49 const struct ndr_syntax_id null_ndr_syntax_id = {
50 { 0, 0, 0, { 0, 0 }, { 0, 0, 0, 0, 0, 0 } },
55 work out the number of bytes needed to align on a n byte boundary
57 _PUBLIC_ size_t ndr_align_size(uint32_t offset, size_t n)
59 if ((offset & (n-1)) == 0) return 0;
60 return n - (offset & (n-1));
64 initialise a ndr parse structure from a data blob
66 _PUBLIC_ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx)
70 ndr = talloc_zero(mem_ctx, struct ndr_pull);
71 if (!ndr) return NULL;
72 ndr->current_mem_ctx = mem_ctx;
74 ndr->data = blob->data;
75 ndr->data_size = blob->length;
81 advance by 'size' bytes
83 _PUBLIC_ enum ndr_err_code ndr_pull_advance(struct ndr_pull *ndr, uint32_t size)
86 if (ndr->offset > ndr->data_size) {
87 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
88 "ndr_pull_advance by %u failed",
91 return NDR_ERR_SUCCESS;
95 set the parse offset to 'ofs'
97 static enum ndr_err_code ndr_pull_set_offset(struct ndr_pull *ndr, uint32_t ofs)
100 if (ndr->offset > ndr->data_size) {
101 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
102 "ndr_pull_set_offset %u failed",
105 return NDR_ERR_SUCCESS;
108 /* create a ndr_push structure, ready for some marshalling */
109 _PUBLIC_ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx)
111 struct ndr_push *ndr;
113 ndr = talloc_zero(mem_ctx, struct ndr_push);
119 ndr->alloc_size = NDR_BASE_MARSHALL_SIZE;
120 ndr->data = talloc_array(ndr, uint8_t, ndr->alloc_size);
128 /* return a DATA_BLOB structure for the current ndr_push marshalled data */
129 _PUBLIC_ DATA_BLOB ndr_push_blob(struct ndr_push *ndr)
132 blob = data_blob_const(ndr->data, ndr->offset);
133 if (ndr->alloc_size > ndr->offset) {
134 ndr->data[ndr->offset] = 0;
141 expand the available space in the buffer to ndr->offset + extra_size
143 _PUBLIC_ enum ndr_err_code ndr_push_expand(struct ndr_push *ndr, uint32_t extra_size)
145 uint32_t size = extra_size + ndr->offset;
147 if (size < ndr->offset) {
148 /* extra_size overflowed the offset */
149 return ndr_push_error(ndr, NDR_ERR_BUFSIZE, "Overflow in push_expand to %u",
153 if (ndr->alloc_size > size) {
154 return NDR_ERR_SUCCESS;
157 ndr->alloc_size += NDR_BASE_MARSHALL_SIZE;
158 if (size+1 > ndr->alloc_size) {
159 ndr->alloc_size = size+1;
161 ndr->data = talloc_realloc(ndr, ndr->data, uint8_t, ndr->alloc_size);
163 return ndr_push_error(ndr, NDR_ERR_ALLOC, "Failed to push_expand to %u",
167 return NDR_ERR_SUCCESS;
170 _PUBLIC_ void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...)
177 va_start(ap, format);
178 ret = vasprintf(&s, format, ap);
185 if (ndr->no_newline) {
186 DEBUGADD(1,("%s", s));
191 for (i=0;i<ndr->depth;i++) {
195 DEBUGADD(1,("%s\n", s));
199 _PUBLIC_ void ndr_print_printf_helper(struct ndr_print *ndr, const char *format, ...)
204 if (!ndr->no_newline) {
205 for (i=0;i<ndr->depth;i++) {
210 va_start(ap, format);
213 if (!ndr->no_newline) {
218 _PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...)
223 if (!ndr->no_newline) {
224 for (i=0;i<ndr->depth;i++) {
225 ndr->private_data = talloc_asprintf_append_buffer(
226 (char *)ndr->private_data, " ");
230 va_start(ap, format);
231 ndr->private_data = talloc_vasprintf_append_buffer((char *)ndr->private_data,
234 if (!ndr->no_newline) {
235 ndr->private_data = talloc_asprintf_append_buffer((char *)ndr->private_data,
241 a useful helper function for printing idl structures via DEBUG()
243 _PUBLIC_ void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr)
245 struct ndr_print *ndr;
249 ndr = talloc_zero(NULL, struct ndr_print);
251 ndr->print = ndr_print_debug_helper;
259 a useful helper function for printing idl unions via DEBUG()
261 _PUBLIC_ void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
263 struct ndr_print *ndr;
267 ndr = talloc_zero(NULL, struct ndr_print);
269 ndr->print = ndr_print_debug_helper;
272 ndr_print_set_switch_value(ndr, ptr, level);
278 a useful helper function for printing idl function calls via DEBUG()
280 _PUBLIC_ void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
282 struct ndr_print *ndr;
286 ndr = talloc_zero(NULL, struct ndr_print);
288 ndr->print = ndr_print_debug_helper;
292 fn(ndr, name, flags, ptr);
297 a useful helper function for printing idl structures to a string
299 _PUBLIC_ char *ndr_print_struct_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, void *ptr)
301 struct ndr_print *ndr;
304 ndr = talloc_zero(mem_ctx, struct ndr_print);
305 if (!ndr) return NULL;
306 ndr->private_data = talloc_strdup(ndr, "");
307 if (!ndr->private_data) {
310 ndr->print = ndr_print_string_helper;
315 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
322 a useful helper function for printing idl unions to a string
324 _PUBLIC_ char *ndr_print_union_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
326 struct ndr_print *ndr;
329 ndr = talloc_zero(mem_ctx, struct ndr_print);
330 if (!ndr) return NULL;
331 ndr->private_data = talloc_strdup(ndr, "");
332 if (!ndr->private_data) {
335 ndr->print = ndr_print_string_helper;
338 ndr_print_set_switch_value(ndr, ptr, level);
340 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
347 a useful helper function for printing idl function calls to a string
349 _PUBLIC_ char *ndr_print_function_string(TALLOC_CTX *mem_ctx,
350 ndr_print_function_t fn, const char *name,
351 int flags, void *ptr)
353 struct ndr_print *ndr;
356 ndr = talloc_zero(mem_ctx, struct ndr_print);
357 if (!ndr) return NULL;
358 ndr->private_data = talloc_strdup(ndr, "");
359 if (!ndr->private_data) {
362 ndr->print = ndr_print_string_helper;
365 fn(ndr, name, flags, ptr);
366 ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
372 _PUBLIC_ void ndr_set_flags(uint32_t *pflags, uint32_t new_flags)
374 /* the big/little endian flags are inter-dependent */
375 if (new_flags & LIBNDR_FLAG_LITTLE_ENDIAN) {
376 (*pflags) &= ~LIBNDR_FLAG_BIGENDIAN;
377 (*pflags) &= ~LIBNDR_FLAG_NDR64;
379 if (new_flags & LIBNDR_FLAG_BIGENDIAN) {
380 (*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN;
381 (*pflags) &= ~LIBNDR_FLAG_NDR64;
383 if (new_flags & LIBNDR_FLAG_REMAINING) {
384 (*pflags) &= ~LIBNDR_ALIGN_FLAGS;
386 if (new_flags & LIBNDR_ALIGN_FLAGS) {
387 (*pflags) &= ~LIBNDR_FLAG_REMAINING;
389 if (new_flags & LIBNDR_FLAG_NO_RELATIVE_REVERSE) {
390 (*pflags) &= ~LIBNDR_FLAG_RELATIVE_REVERSE;
392 (*pflags) |= new_flags;
396 return and possibly log an NDR error
398 _PUBLIC_ enum ndr_err_code ndr_pull_error(struct ndr_pull *ndr,
399 enum ndr_err_code ndr_err,
400 const char *format, ...)
406 va_start(ap, format);
407 ret = vasprintf(&s, format, ap);
411 return NDR_ERR_ALLOC;
414 DEBUG(1,("ndr_pull_error(%u): %s\n", ndr_err, s));
422 return and possibly log an NDR error
424 _PUBLIC_ enum ndr_err_code ndr_push_error(struct ndr_push *ndr,
425 enum ndr_err_code ndr_err,
426 const char *format, ...)
432 va_start(ap, format);
433 ret = vasprintf(&s, format, ap);
437 return NDR_ERR_ALLOC;
440 DEBUG(1,("ndr_push_error(%u): %s\n", ndr_err, s));
448 handle subcontext buffers, which in midl land are user-marshalled, but
449 we use magic in pidl to make them easier to cope with
451 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_start(struct ndr_pull *ndr,
452 struct ndr_pull **_subndr,
456 struct ndr_pull *subndr;
457 uint32_t r_content_size;
458 bool force_le = false;
459 bool force_be = false;
461 switch (header_size) {
463 uint32_t content_size = ndr->data_size - ndr->offset;
465 content_size = size_is;
467 r_content_size = content_size;
472 uint16_t content_size;
473 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &content_size));
474 if (size_is >= 0 && size_is != content_size) {
475 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
476 (int)size_is, (int)content_size);
478 r_content_size = content_size;
483 uint32_t content_size;
484 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &content_size));
485 if (size_is >= 0 && size_is != content_size) {
486 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
487 (int)size_is, (int)content_size);
489 r_content_size = content_size;
494 * Common Type Header for the Serialization Stream
495 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
501 uint32_t content_size;
505 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &version));
508 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
509 "Bad subcontext (PULL) Common Type Header version %d != 1",
517 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &drep));
520 } else if (drep == 0x00) {
523 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
524 "Bad subcontext (PULL) Common Type Header invalid drep 0x%02X",
528 /* length of the "Private Header for Constructed Type" */
529 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &hdrlen));
531 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
532 "Bad subcontext (PULL) Common Type Header length %d != 8",
536 /* filler should be ignored */
537 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &filler));
540 * Private Header for Constructed Type
542 /* length - will be updated latter */
543 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
544 if (size_is >= 0 && size_is != content_size) {
545 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
546 (int)size_is, (int)content_size);
548 /* the content size must be a multiple of 8 */
549 if ((content_size % 8) != 0) {
550 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
551 "Bad subcontext (PULL) size_is(%d) not padded to 8 content_size %d",
552 (int)size_is, (int)content_size);
554 r_content_size = content_size;
557 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &reserved));
561 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) header_size %d",
565 NDR_PULL_NEED_BYTES(ndr, r_content_size);
567 subndr = talloc_zero(ndr, struct ndr_pull);
568 NDR_ERR_HAVE_NO_MEMORY(subndr);
569 subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
570 subndr->current_mem_ctx = ndr->current_mem_ctx;
572 subndr->data = ndr->data + ndr->offset;
574 subndr->data_size = r_content_size;
577 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_LITTLE_ENDIAN);
578 } else if (force_be) {
579 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_BIGENDIAN);
583 return NDR_ERR_SUCCESS;
586 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_end(struct ndr_pull *ndr,
587 struct ndr_pull *subndr,
594 } else if (header_size > 0) {
595 advance = subndr->data_size;
597 advance = subndr->offset;
599 NDR_CHECK(ndr_pull_advance(ndr, advance));
600 return NDR_ERR_SUCCESS;
603 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_start(struct ndr_push *ndr,
604 struct ndr_push **_subndr,
608 struct ndr_push *subndr;
610 subndr = ndr_push_init_ctx(ndr);
611 NDR_ERR_HAVE_NO_MEMORY(subndr);
612 subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
615 NDR_CHECK(ndr_push_zero(subndr, size_is));
617 subndr->relative_end_offset = size_is;
621 return NDR_ERR_SUCCESS;
625 push a subcontext header
627 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_end(struct ndr_push *ndr,
628 struct ndr_push *subndr,
635 padding_len = size_is - subndr->offset;
636 if (padding_len < 0) {
637 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PUSH) content_size %d is larger than size_is(%d)",
638 (int)subndr->offset, (int)size_is);
640 subndr->offset = size_is;
643 switch (header_size) {
648 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, subndr->offset));
652 NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, subndr->offset));
657 * Common Type Header for the Serialization Stream
658 * See [MS-RPCE] 2.2.6 Type Serialization Version 1
660 padding_len = NDR_ROUND(subndr->offset, 8) - subndr->offset;
661 if (padding_len > 0) {
662 NDR_CHECK(ndr_push_zero(subndr, padding_len));
666 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, 1));
672 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, NDR_BE(ndr)?0x00:0x10));
674 /* length of the "Private Header for Constructed Type" */
675 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 8));
678 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0xCCCCCCCC));
681 * Private Header for Constructed Type
683 /* length - will be updated latter */
684 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
687 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
691 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext header size %d",
695 NDR_CHECK(ndr_push_bytes(ndr, subndr->data, subndr->offset));
696 return NDR_ERR_SUCCESS;
700 store a token in the ndr context, for later retrieval
702 _PUBLIC_ enum ndr_err_code ndr_token_store(TALLOC_CTX *mem_ctx,
703 struct ndr_token_list **list,
707 struct ndr_token_list *tok;
708 tok = talloc(mem_ctx, struct ndr_token_list);
709 NDR_ERR_HAVE_NO_MEMORY(tok);
712 DLIST_ADD((*list), tok);
713 return NDR_ERR_SUCCESS;
717 retrieve a token from a ndr context, using cmp_fn to match the tokens
719 _PUBLIC_ enum ndr_err_code ndr_token_retrieve_cmp_fn(struct ndr_token_list **list, const void *key, uint32_t *v,
720 comparison_fn_t _cmp_fn, bool _remove_tok)
722 struct ndr_token_list *tok;
723 for (tok=*list;tok;tok=tok->next) {
724 if (_cmp_fn && _cmp_fn(tok->key,key)==0) goto found;
725 else if (!_cmp_fn && tok->key == key) goto found;
727 return NDR_ERR_TOKEN;
731 DLIST_REMOVE((*list), tok);
734 return NDR_ERR_SUCCESS;
738 retrieve a token from a ndr context
740 _PUBLIC_ enum ndr_err_code ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
742 return ndr_token_retrieve_cmp_fn(list, key, v, NULL, true);
746 peek at but don't removed a token from a ndr context
748 _PUBLIC_ uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
750 enum ndr_err_code status;
753 status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, false);
754 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
762 pull an array size field and add it to the array_size_list token list
764 _PUBLIC_ enum ndr_err_code ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
767 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &size));
768 return ndr_token_store(ndr, &ndr->array_size_list, p, size);
772 get the stored array size field
774 _PUBLIC_ uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p)
776 return ndr_token_peek(&ndr->array_size_list, p);
780 check the stored array size field
782 _PUBLIC_ enum ndr_err_code ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size)
785 stored = ndr_token_peek(&ndr->array_size_list, p);
786 if (stored != size) {
787 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
788 "Bad array size - got %u expected %u\n",
791 return NDR_ERR_SUCCESS;
795 pull an array length field and add it to the array_length_list token list
797 _PUBLIC_ enum ndr_err_code ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
799 uint32_t length, offset;
800 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &offset));
802 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
803 "non-zero array offset %u\n", offset);
805 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &length));
806 return ndr_token_store(ndr, &ndr->array_length_list, p, length);
810 get the stored array length field
812 _PUBLIC_ uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p)
814 return ndr_token_peek(&ndr->array_length_list, p);
818 check the stored array length field
820 _PUBLIC_ enum ndr_err_code ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
823 stored = ndr_token_peek(&ndr->array_length_list, p);
824 if (stored != length) {
825 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
826 "Bad array length - got %u expected %u\n",
829 return NDR_ERR_SUCCESS;
835 _PUBLIC_ enum ndr_err_code ndr_push_set_switch_value(struct ndr_push *ndr, const void *p, uint32_t val)
837 return ndr_token_store(ndr, &ndr->switch_list, p, val);
840 _PUBLIC_ enum ndr_err_code ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val)
842 return ndr_token_store(ndr, &ndr->switch_list, p, val);
845 _PUBLIC_ enum ndr_err_code ndr_print_set_switch_value(struct ndr_print *ndr, const void *p, uint32_t val)
847 return ndr_token_store(ndr, &ndr->switch_list, p, val);
851 retrieve a switch value
853 _PUBLIC_ uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p)
855 return ndr_token_peek(&ndr->switch_list, p);
858 _PUBLIC_ uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p)
860 return ndr_token_peek(&ndr->switch_list, p);
863 _PUBLIC_ uint32_t ndr_print_get_switch_value(struct ndr_print *ndr, const void *p)
865 return ndr_token_peek(&ndr->switch_list, p);
869 pull a struct from a blob using NDR
871 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
872 ndr_pull_flags_fn_t fn)
874 struct ndr_pull *ndr;
875 ndr = ndr_pull_init_blob(blob, mem_ctx);
876 NDR_ERR_HAVE_NO_MEMORY(ndr);
877 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
879 return NDR_ERR_SUCCESS;
883 pull a struct from a blob using NDR - failing if all bytes are not consumed
885 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
886 void *p, ndr_pull_flags_fn_t fn)
888 struct ndr_pull *ndr;
889 uint32_t highest_ofs;
890 ndr = ndr_pull_init_blob(blob, mem_ctx);
891 NDR_ERR_HAVE_NO_MEMORY(ndr);
892 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
893 if (ndr->offset > ndr->relative_highest_offset) {
894 highest_ofs = ndr->offset;
896 highest_ofs = ndr->relative_highest_offset;
898 if (highest_ofs < ndr->data_size) {
899 enum ndr_err_code ret;
900 ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
901 "not all bytes consumed ofs[%u] size[%u]",
902 highest_ofs, ndr->data_size);
907 return NDR_ERR_SUCCESS;
911 pull a union from a blob using NDR, given the union discriminator
913 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
915 uint32_t level, ndr_pull_flags_fn_t fn)
917 struct ndr_pull *ndr;
918 ndr = ndr_pull_init_blob(blob, mem_ctx);
919 NDR_ERR_HAVE_NO_MEMORY(ndr);
920 NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
921 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
923 return NDR_ERR_SUCCESS;
927 pull a union from a blob using NDR, given the union discriminator,
928 failing if all bytes are not consumed
930 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
932 uint32_t level, ndr_pull_flags_fn_t fn)
934 struct ndr_pull *ndr;
935 uint32_t highest_ofs;
936 ndr = ndr_pull_init_blob(blob, mem_ctx);
937 NDR_ERR_HAVE_NO_MEMORY(ndr);
938 NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
939 NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
940 if (ndr->offset > ndr->relative_highest_offset) {
941 highest_ofs = ndr->offset;
943 highest_ofs = ndr->relative_highest_offset;
945 if (highest_ofs < ndr->data_size) {
946 enum ndr_err_code ret;
947 ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
948 "not all bytes consumed ofs[%u] size[%u]",
949 highest_ofs, ndr->data_size);
954 return NDR_ERR_SUCCESS;
958 push a struct to a blob using NDR
960 _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)
962 struct ndr_push *ndr;
963 ndr = ndr_push_init_ctx(mem_ctx);
964 NDR_ERR_HAVE_NO_MEMORY(ndr);
966 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
968 *blob = ndr_push_blob(ndr);
969 talloc_steal(mem_ctx, blob->data);
972 return NDR_ERR_SUCCESS;
976 push a union to a blob using NDR
978 _PUBLIC_ enum ndr_err_code ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
979 uint32_t level, ndr_push_flags_fn_t fn)
981 struct ndr_push *ndr;
982 ndr = ndr_push_init_ctx(mem_ctx);
983 NDR_ERR_HAVE_NO_MEMORY(ndr);
985 NDR_CHECK(ndr_push_set_switch_value(ndr, p, level));
986 NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
988 *blob = ndr_push_blob(ndr);
989 talloc_steal(mem_ctx, blob->data);
992 return NDR_ERR_SUCCESS;
996 generic ndr_size_*() handler for structures
998 _PUBLIC_ size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push)
1000 struct ndr_push *ndr;
1001 enum ndr_err_code status;
1004 /* avoid recursion */
1005 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
1007 ndr = ndr_push_init_ctx(NULL);
1009 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
1010 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, discard_const(p));
1011 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1021 generic ndr_size_*() handler for unions
1023 _PUBLIC_ size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push)
1025 struct ndr_push *ndr;
1026 enum ndr_err_code status;
1029 /* avoid recursion */
1030 if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
1032 ndr = ndr_push_init_ctx(NULL);
1034 ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
1036 status = ndr_push_set_switch_value(ndr, p, level);
1037 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1041 status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
1042 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
1052 get the current base for relative pointers for the push
1054 _PUBLIC_ uint32_t ndr_push_get_relative_base_offset(struct ndr_push *ndr)
1056 return ndr->relative_base_offset;
1060 restore the old base for relative pointers for the push
1062 _PUBLIC_ void ndr_push_restore_relative_base_offset(struct ndr_push *ndr, uint32_t offset)
1064 ndr->relative_base_offset = offset;
1068 setup the current base for relative pointers for the push
1069 called in the NDR_SCALAR stage
1071 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset1(struct ndr_push *ndr, const void *p, uint32_t offset)
1073 ndr->relative_base_offset = offset;
1074 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1078 setup the current base for relative pointers for the push
1079 called in the NDR_BUFFERS stage
1081 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset2(struct ndr_push *ndr, const void *p)
1083 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1087 push a relative object - stage1
1088 this is called during SCALARS processing
1090 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p)
1093 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
1094 return NDR_ERR_SUCCESS;
1096 NDR_CHECK(ndr_push_align(ndr, 4));
1097 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1098 return ndr_push_uint32(ndr, NDR_SCALARS, 0xFFFFFFFF);
1102 push a short relative object - stage1
1103 this is called during SCALARS processing
1105 _PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr1(struct ndr_push *ndr, const void *p)
1108 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 0));
1109 return NDR_ERR_SUCCESS;
1111 NDR_CHECK(ndr_push_align(ndr, 2));
1112 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1113 return ndr_push_uint16(ndr, NDR_SCALARS, 0xFFFF);
1116 push a relative object - stage2
1117 this is called during buffers processing
1119 static enum ndr_err_code ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p)
1121 uint32_t save_offset;
1122 uint32_t ptr_offset = 0xFFFFFFFF;
1124 return NDR_ERR_SUCCESS;
1126 save_offset = ndr->offset;
1127 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1128 if (ptr_offset > ndr->offset) {
1129 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1130 "ndr_push_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1131 ptr_offset, ndr->offset);
1133 ndr->offset = ptr_offset;
1134 if (save_offset < ndr->relative_base_offset) {
1135 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1136 "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1137 save_offset, ndr->relative_base_offset);
1139 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1140 ndr->offset = save_offset;
1141 return NDR_ERR_SUCCESS;
1144 push a short relative object - stage2
1145 this is called during buffers processing
1147 _PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr2(struct ndr_push *ndr, const void *p)
1149 uint32_t save_offset;
1150 uint32_t ptr_offset = 0xFFFF;
1152 return NDR_ERR_SUCCESS;
1154 save_offset = ndr->offset;
1155 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1156 if (ptr_offset > ndr->offset) {
1157 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1158 "ndr_push_short_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1159 ptr_offset, ndr->offset);
1161 ndr->offset = ptr_offset;
1162 if (save_offset < ndr->relative_base_offset) {
1163 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1164 "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1165 save_offset, ndr->relative_base_offset);
1167 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1168 ndr->offset = save_offset;
1169 return NDR_ERR_SUCCESS;
1173 push a relative object - stage2 start
1174 this is called during buffers processing
1176 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_start(struct ndr_push *ndr, const void *p)
1179 return NDR_ERR_SUCCESS;
1181 if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
1182 uint32_t relative_offset;
1186 if (ndr->offset < ndr->relative_base_offset) {
1187 return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
1188 "ndr_push_relative_ptr2_start ndr->offset(%u) < ndr->relative_base_offset(%u)",
1189 ndr->offset, ndr->relative_base_offset);
1192 relative_offset = ndr->offset - ndr->relative_base_offset;
1194 if (ndr->flags & LIBNDR_FLAG_NOALIGN) {
1196 } else if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
1198 } else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
1200 } else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
1204 pad = ndr_align_size(relative_offset, align);
1206 NDR_CHECK(ndr_push_zero(ndr, pad));
1209 return ndr_push_relative_ptr2(ndr, p);
1211 if (ndr->relative_end_offset == -1) {
1212 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1213 "ndr_push_relative_ptr2_start RELATIVE_REVERSE flag set and relative_end_offset %d",
1214 ndr->relative_end_offset);
1216 NDR_CHECK(ndr_token_store(ndr, &ndr->relative_begin_list, p, ndr->offset));
1217 return NDR_ERR_SUCCESS;
1221 push a relative object - stage2 end
1222 this is called during buffers processing
1224 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_end(struct ndr_push *ndr, const void *p)
1226 uint32_t begin_offset = 0xFFFFFFFF;
1228 uint32_t correct_offset = 0;
1233 return NDR_ERR_SUCCESS;
1236 if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
1237 return NDR_ERR_SUCCESS;
1240 if (ndr->flags & LIBNDR_FLAG_NO_NDR_SIZE) {
1241 /* better say more than calculation a too small buffer */
1242 NDR_PUSH_ALIGN(ndr, 8);
1243 return NDR_ERR_SUCCESS;
1246 if (ndr->relative_end_offset < ndr->offset) {
1247 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1248 "ndr_push_relative_ptr2_end:"
1249 "relative_end_offset %u < offset %u",
1250 ndr->relative_end_offset, ndr->offset);
1253 NDR_CHECK(ndr_token_retrieve(&ndr->relative_begin_list, p, &begin_offset));
1255 /* we have marshalled a buffer, see how long it was */
1256 len = ndr->offset - begin_offset;
1259 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1260 "ndr_push_relative_ptr2_end:"
1261 "offset %u - begin_offset %u < 0",
1262 ndr->offset, begin_offset);
1265 if (ndr->relative_end_offset < len) {
1266 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1267 "ndr_push_relative_ptr2_end:"
1268 "relative_end_offset %u < len %lld",
1269 ndr->offset, (long long)len);
1272 /* the reversed offset is at the end of the main buffer */
1273 correct_offset = ndr->relative_end_offset - len;
1275 if (ndr->flags & LIBNDR_FLAG_NOALIGN) {
1277 } else if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
1279 } else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
1281 } else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
1285 pad = ndr_align_size(correct_offset, align);
1287 correct_offset += pad;
1288 correct_offset -= align;
1291 if (correct_offset < begin_offset) {
1292 return ndr_push_error(ndr, NDR_ERR_RELATIVE,
1293 "ndr_push_relative_ptr2_end: "
1294 "correct_offset %u < begin_offset %u",
1295 correct_offset, begin_offset);
1299 uint32_t clear_size = correct_offset - begin_offset;
1301 clear_size = MIN(clear_size, len);
1303 /* now move the marshalled buffer to the end of the main buffer */
1304 memmove(ndr->data + correct_offset, ndr->data + begin_offset, len);
1307 /* and wipe out old buffer within the main buffer */
1308 memset(ndr->data + begin_offset, '\0', clear_size);
1312 /* and set the end offset for the next buffer */
1313 ndr->relative_end_offset = correct_offset;
1315 /* finally write the offset to the main buffer */
1316 ndr->offset = correct_offset;
1317 NDR_CHECK(ndr_push_relative_ptr2(ndr, p));
1319 /* restore to where we were in the main buffer */
1320 ndr->offset = begin_offset;
1322 return NDR_ERR_SUCCESS;
1326 get the current base for relative pointers for the pull
1328 _PUBLIC_ uint32_t ndr_pull_get_relative_base_offset(struct ndr_pull *ndr)
1330 return ndr->relative_base_offset;
1334 restore the old base for relative pointers for the pull
1336 _PUBLIC_ void ndr_pull_restore_relative_base_offset(struct ndr_pull *ndr, uint32_t offset)
1338 ndr->relative_base_offset = offset;
1342 setup the current base for relative pointers for the pull
1343 called in the NDR_SCALAR stage
1345 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset1(struct ndr_pull *ndr, const void *p, uint32_t offset)
1347 ndr->relative_base_offset = offset;
1348 return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1352 setup the current base for relative pointers for the pull
1353 called in the NDR_BUFFERS stage
1355 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset2(struct ndr_pull *ndr, const void *p)
1357 return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1361 pull a relative object - stage1
1362 called during SCALARS processing
1364 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset)
1366 rel_offset += ndr->relative_base_offset;
1367 if (rel_offset > ndr->data_size) {
1368 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
1369 "ndr_pull_relative_ptr1 rel_offset(%u) > ndr->data_size(%u)",
1370 rel_offset, ndr->data_size);
1372 return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
1376 pull a relative object - stage2
1377 called during BUFFERS processing
1379 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr2(struct ndr_pull *ndr, const void *p)
1381 uint32_t rel_offset;
1382 NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset));
1383 return ndr_pull_set_offset(ndr, rel_offset);
1386 const static struct {
1387 enum ndr_err_code err;
1389 } ndr_err_code_strings[] = {
1390 { NDR_ERR_SUCCESS, "Success" },
1391 { NDR_ERR_ARRAY_SIZE, "Bad Array Size" },
1392 { NDR_ERR_BAD_SWITCH, "Bad Switch" },
1393 { NDR_ERR_OFFSET, "Offset Error" },
1394 { NDR_ERR_RELATIVE, "Relative Pointer Error" },
1395 { NDR_ERR_CHARCNV, "Character Conversion Error" },
1396 { NDR_ERR_LENGTH, "Length Error" },
1397 { NDR_ERR_SUBCONTEXT, "Subcontext Error" },
1398 { NDR_ERR_COMPRESSION, "Compression Error" },
1399 { NDR_ERR_STRING, "String Error" },
1400 { NDR_ERR_VALIDATE, "Validate Error" },
1401 { NDR_ERR_BUFSIZE, "Buffer Size Error" },
1402 { NDR_ERR_ALLOC, "Allocation Error" },
1403 { NDR_ERR_RANGE, "Range Error" },
1404 { NDR_ERR_TOKEN, "Token Error" },
1405 { NDR_ERR_IPV4ADDRESS, "IPv4 Address Error" },
1406 { NDR_ERR_INVALID_POINTER, "Invalid Pointer" },
1407 { NDR_ERR_UNREAD_BYTES, "Unread Bytes" },
1408 { NDR_ERR_NDR64, "NDR64 assertion error" },
1412 _PUBLIC_ const char *ndr_map_error2string(enum ndr_err_code ndr_err)
1415 for (i = 0; ndr_err_code_strings[i].string != NULL; i++) {
1416 if (ndr_err_code_strings[i].err == ndr_err)
1417 return ndr_err_code_strings[i].string;
1419 return "Unknown error";