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samba-mirror/source4/librpc/ndr/ndr.c

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/*
Unix SMB/CIFS implementation.
libndr interface
Copyright (C) Andrew Tridgell 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
this provides the core routines for NDR parsing functions
see http://www.opengroup.org/onlinepubs/9629399/chap14.htm for details
of NDR encoding rules
*/
#include "includes.h"
#include "dlinklist.h"
#define NDR_BASE_MARSHALL_SIZE 1024
/*
work out the number of bytes needed to align on a n byte boundary
*/
size_t ndr_align_size(uint32_t offset, size_t n)
{
if ((offset & (n-1)) == 0) return 0;
return n - (offset & (n-1));
}
/*
initialise a ndr parse structure from a data blob
*/
struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx)
{
struct ndr_pull *ndr;
ndr = talloc_zero_p(mem_ctx, struct ndr_pull);
if (!ndr) return NULL;
ndr->data = blob->data;
ndr->data_size = blob->length;
return ndr;
}
/*
create an ndr sub-context based on an existing context. The new context starts
at the current offset, with the given size limit
*/
NTSTATUS ndr_pull_subcontext(struct ndr_pull *ndr, struct ndr_pull *ndr2, uint32_t size)
{
NDR_PULL_NEED_BYTES(ndr, size);
*ndr2 = *ndr;
ndr2->data += ndr2->offset;
ndr2->offset = 0;
ndr2->data_size = size;
ndr2->flags = ndr->flags;
return NT_STATUS_OK;
}
/*
advance by 'size' bytes
*/
NTSTATUS ndr_pull_advance(struct ndr_pull *ndr, uint32_t size)
{
ndr->offset += size;
if (ndr->offset > ndr->data_size) {
return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
"ndr_pull_advance by %u failed",
size);
}
return NT_STATUS_OK;
}
/*
set the parse offset to 'ofs'
*/
NTSTATUS ndr_pull_set_offset(struct ndr_pull *ndr, uint32_t ofs)
{
ndr->offset = ofs;
if (ndr->offset > ndr->data_size) {
return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
"ndr_pull_set_offset %u failed",
ofs);
}
return NT_STATUS_OK;
}
/* save the offset/size of the current ndr state */
void ndr_pull_save(struct ndr_pull *ndr, struct ndr_pull_save *save)
{
save->offset = ndr->offset;
save->data_size = ndr->data_size;
}
/* restore the size/offset of a ndr structure */
void ndr_pull_restore(struct ndr_pull *ndr, struct ndr_pull_save *save)
{
ndr->offset = save->offset;
ndr->data_size = save->data_size;
}
/* create a ndr_push structure, ready for some marshalling */
struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx)
{
struct ndr_push *ndr;
ndr = talloc_zero_p(mem_ctx, struct ndr_push);
if (!ndr) {
return NULL;
}
ndr->flags = 0;
ndr->alloc_size = NDR_BASE_MARSHALL_SIZE;
ndr->data = talloc(ndr, ndr->alloc_size);
if (!ndr->data) {
return NULL;
}
return ndr;
}
/* create a ndr_push structure, ready for some marshalling */
struct ndr_push *ndr_push_init(void)
{
return ndr_push_init_ctx(NULL);
}
/* free a ndr_push structure */
void ndr_push_free(struct ndr_push *ndr)
{
talloc_free(ndr);
}
/* return a DATA_BLOB structure for the current ndr_push marshalled data */
DATA_BLOB ndr_push_blob(struct ndr_push *ndr)
{
DATA_BLOB blob;
blob.data = ndr->data;
blob.length = ndr->offset;
return blob;
}
/*
expand the available space in the buffer to 'size'
*/
NTSTATUS ndr_push_expand(struct ndr_push *ndr, uint32_t size)
{
if (ndr->alloc_size >= size) {
return NT_STATUS_OK;
}
ndr->alloc_size += NDR_BASE_MARSHALL_SIZE;
if (size > ndr->alloc_size) {
ndr->alloc_size = size;
}
ndr->data = talloc_realloc(ndr, ndr->data, ndr->alloc_size);
if (!ndr->data) {
return ndr_push_error(ndr, NDR_ERR_ALLOC, "Failed to push_expand to %u",
ndr->alloc_size);
}
return NT_STATUS_OK;
}
/*
set the push offset to 'ofs'
*/
NTSTATUS ndr_push_set_offset(struct ndr_push *ndr, uint32_t ofs)
{
NDR_CHECK(ndr_push_expand(ndr, ofs));
ndr->offset = ofs;
return NT_STATUS_OK;
}
/*
push a generic array
*/
NTSTATUS ndr_push_array(struct ndr_push *ndr, int ndr_flags, void *base,
size_t elsize, uint32_t count,
NTSTATUS (*push_fn)(struct ndr_push *, int, void *))
{
int i;
char *p = base;
if (!(ndr_flags & NDR_SCALARS)) goto buffers;
for (i=0;i<count;i++) {
NDR_CHECK(push_fn(ndr, NDR_SCALARS, p));
p += elsize;
}
if (!(ndr_flags & NDR_BUFFERS)) goto done;
buffers:
p = base;
for (i=0;i<count;i++) {
NDR_CHECK(push_fn(ndr, NDR_BUFFERS, p));
p += elsize;
}
done:
return NT_STATUS_OK;
}
/*
pull a constant sized array
*/
NTSTATUS ndr_pull_array(struct ndr_pull *ndr, int ndr_flags, void *base,
size_t elsize, uint32_t count,
NTSTATUS (*pull_fn)(struct ndr_pull *, int, void *))
{
int i;
char *p;
p = base;
if (!(ndr_flags & NDR_SCALARS)) goto buffers;
for (i=0;i<count;i++) {
NDR_CHECK(pull_fn(ndr, NDR_SCALARS, p));
p += elsize;
}
if (!(ndr_flags & NDR_BUFFERS)) goto done;
buffers:
p = base;
for (i=0;i<count;i++) {
NDR_CHECK(pull_fn(ndr, NDR_BUFFERS, p));
p += elsize;
}
done:
return NT_STATUS_OK;
}
/*
pull a constant size array of structures
*/
NTSTATUS ndr_pull_struct_array(struct ndr_pull *ndr, uint32_t count,
size_t elsize, void **info,
NTSTATUS (*pull_fn)(struct ndr_pull *, int, void *))
{
int i;
char *base;
NDR_ALLOC_N_SIZE(ndr, *info, count, elsize);
base = (char *)*info;
for (i = 0; i < count; i++) {
ndr->data += ndr->offset;
ndr->offset = 0;
NDR_CHECK(pull_fn(ndr, NDR_SCALARS|NDR_BUFFERS, &base[count * elsize]));
}
return NT_STATUS_OK;
}
/*
print a generic array
*/
void ndr_print_array(struct ndr_print *ndr, const char *name, void *base,
size_t elsize, uint32_t count,
void (*print_fn)(struct ndr_print *, const char *, void *))
{
int i;
char *p = base;
ndr->print(ndr, "%s: ARRAY(%d)", name, count);
ndr->depth++;
for (i=0;i<count;i++) {
char *idx=NULL;
asprintf(&idx, "[%d]", i);
if (idx) {
print_fn(ndr, idx, p);
free(idx);
}
p += elsize;
}
ndr->depth--;
}
void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...) _PRINTF_ATTRIBUTE(2,3)
{
va_list ap;
char *s = NULL;
int i;
va_start(ap, format);
vasprintf(&s, format, ap);
va_end(ap);
for (i=0;i<ndr->depth;i++) {
DEBUG(0,(" "));
}
DEBUG(0,("%s\n", s));
free(s);
}
/*
a useful helper function for printing idl structures via DEBUG()
*/
void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr)
{
struct ndr_print *ndr;
ndr = talloc_p(NULL, struct ndr_print);
if (!ndr) return;
ndr->print = ndr_print_debug_helper;
ndr->depth = 1;
ndr->flags = 0;
fn(ndr, name, ptr);
talloc_free(ndr);
}
/*
a useful helper function for printing idl unions via DEBUG()
*/
void ndr_print_union_debug(ndr_print_union_fn_t fn, const char *name, uint32_t level, void *ptr)
{
struct ndr_print *ndr;
ndr = talloc_p(NULL, struct ndr_print);
if (!ndr) return;
ndr->print = ndr_print_debug_helper;
ndr->depth = 1;
ndr->flags = 0;
fn(ndr, name, level, ptr);
talloc_free(ndr);
}
/*
a useful helper function for printing idl function calls via DEBUG()
*/
void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
{
struct ndr_print *ndr;
ndr = talloc_p(NULL, struct ndr_print);
if (!ndr) return;
ndr->print = ndr_print_debug_helper;
ndr->depth = 1;
ndr->flags = 0;
fn(ndr, name, flags, ptr);
talloc_free(ndr);
}
void ndr_set_flags(uint32_t *pflags, uint32_t new_flags)
{
/* the big/little endian flags are inter-dependent */
if (new_flags & LIBNDR_FLAG_LITTLE_ENDIAN) {
(*pflags) &= ~LIBNDR_FLAG_BIGENDIAN;
}
if (new_flags & LIBNDR_FLAG_BIGENDIAN) {
(*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN;
}
(*pflags) |= new_flags;
}
static NTSTATUS ndr_map_error(enum ndr_err_code err)
{
switch (err) {
case NDR_ERR_BUFSIZE:
return NT_STATUS_BUFFER_TOO_SMALL;
case NDR_ERR_TOKEN:
return NT_STATUS_INTERNAL_ERROR;
case NDR_ERR_ALLOC:
return NT_STATUS_NO_MEMORY;
case NDR_ERR_ARRAY_SIZE:
return NT_STATUS_ARRAY_BOUNDS_EXCEEDED;
default:
break;
}
/* we should all error codes to different status codes */
return NT_STATUS_INVALID_PARAMETER;
}
/*
return and possibly log an NDR error
*/
NTSTATUS ndr_pull_error(struct ndr_pull *ndr,
enum ndr_err_code err, const char *format, ...) _PRINTF_ATTRIBUTE(3,4)
{
char *s=NULL;
va_list ap;
va_start(ap, format);
vasprintf(&s, format, ap);
va_end(ap);
DEBUG(3,("ndr_pull_error(%u): %s\n", err, s));
free(s);
return ndr_map_error(err);
}
/*
return and possibly log an NDR error
*/
NTSTATUS ndr_push_error(struct ndr_push *ndr, enum ndr_err_code err, const char *format, ...) _PRINTF_ATTRIBUTE(3,4)
{
char *s=NULL;
va_list ap;
va_start(ap, format);
vasprintf(&s, format, ap);
va_end(ap);
DEBUG(3,("ndr_push_error(%u): %s\n", err, s));
free(s);
return ndr_map_error(err);
}
/*
handle subcontext buffers, which in midl land are user-marshalled, but
we use magic in pidl to make them easier to cope with
*/
static NTSTATUS ndr_pull_subcontext_header(struct ndr_pull *ndr,
size_t sub_size,
struct ndr_pull *ndr2)
{
switch (sub_size) {
case 0: {
uint32_t size = ndr->data_size - ndr->offset;
if (size == 0) return NT_STATUS_OK;
NDR_CHECK(ndr_pull_subcontext(ndr, ndr2, size));
break;
}
case 2: {
uint16_t size;
NDR_CHECK(ndr_pull_uint16(ndr, &size));
if (size == 0) return NT_STATUS_OK;
NDR_CHECK(ndr_pull_subcontext(ndr, ndr2, size));
break;
}
case 4: {
uint32_t size;
NDR_CHECK(ndr_pull_uint32(ndr, &size));
if (size == 0) return NT_STATUS_OK;
NDR_CHECK(ndr_pull_subcontext(ndr, ndr2, size));
break;
}
default:
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext size %d",
sub_size);
}
return NT_STATUS_OK;
}
/*
handle subcontext buffers, which in midl land are user-marshalled, but
we use magic in pidl to make them easier to cope with
*/
NTSTATUS ndr_pull_subcontext_fn(struct ndr_pull *ndr, size_t sub_size,
void *base, ndr_pull_fn_t fn)
{
struct ndr_pull *ndr2;
NDR_ALLOC(ndr, ndr2);
NDR_CHECK(ndr_pull_subcontext_header(ndr, sub_size, ndr2));
NDR_CHECK(fn(ndr2, base));
if (sub_size) {
NDR_CHECK(ndr_pull_advance(ndr, ndr2->data_size));
} else {
NDR_CHECK(ndr_pull_advance(ndr, ndr2->offset));
}
return NT_STATUS_OK;
}
NTSTATUS ndr_pull_subcontext_flags_fn(struct ndr_pull *ndr, size_t sub_size,
void *base, ndr_pull_flags_fn_t fn)
{
struct ndr_pull *ndr2;
NDR_ALLOC(ndr, ndr2);
NDR_CHECK(ndr_pull_subcontext_header(ndr, sub_size, ndr2));
NDR_CHECK(fn(ndr2, NDR_SCALARS|NDR_BUFFERS, base));
if (sub_size) {
NDR_CHECK(ndr_pull_advance(ndr, ndr2->data_size));
} else {
NDR_CHECK(ndr_pull_advance(ndr, ndr2->offset));
}
return NT_STATUS_OK;
}
NTSTATUS ndr_pull_subcontext_union_fn(struct ndr_pull *ndr, size_t sub_size,
uint32_t level, void *base, ndr_pull_union_fn_t fn)
{
struct ndr_pull *ndr2;
NDR_ALLOC(ndr, ndr2);
NDR_CHECK(ndr_pull_subcontext_header(ndr, sub_size, ndr2));
NDR_CHECK(fn(ndr2, NDR_SCALARS|NDR_BUFFERS, level, base));
if (sub_size) {
NDR_CHECK(ndr_pull_advance(ndr, ndr2->data_size));
} else {
NDR_CHECK(ndr_pull_advance(ndr, ndr2->offset));
}
return NT_STATUS_OK;
}
/*
push a subcontext header
*/
static NTSTATUS ndr_push_subcontext_header(struct ndr_push *ndr,
size_t sub_size,
struct ndr_push *ndr2)
{
switch (sub_size) {
case 0:
break;
case 2:
NDR_CHECK(ndr_push_uint16(ndr, ndr2->offset));
break;
case 4:
NDR_CHECK(ndr_push_uint32(ndr, ndr2->offset));
break;
default:
return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext size %d",
sub_size);
}
return NT_STATUS_OK;
}
/*
handle subcontext buffers, which in midl land are user-marshalled, but
we use magic in pidl to make them easier to cope with
*/
NTSTATUS ndr_push_subcontext_fn(struct ndr_push *ndr, size_t sub_size,
void *base, ndr_push_fn_t fn)
{
struct ndr_push *ndr2;
ndr2 = ndr_push_init_ctx(ndr);
if (!ndr2) return NT_STATUS_NO_MEMORY;
ndr2->flags = ndr->flags;
NDR_CHECK(fn(ndr2, base));
NDR_CHECK(ndr_push_subcontext_header(ndr, sub_size, ndr2));
NDR_CHECK(ndr_push_bytes(ndr, ndr2->data, ndr2->offset));
return NT_STATUS_OK;
}
/*
handle subcontext buffers for function that take a flags arg
*/
NTSTATUS ndr_push_subcontext_flags_fn(struct ndr_push *ndr, size_t sub_size,
void *base, ndr_push_flags_fn_t fn)
{
struct ndr_push *ndr2;
ndr2 = ndr_push_init_ctx(ndr);
if (!ndr2) return NT_STATUS_NO_MEMORY;
ndr2->flags = ndr->flags;
NDR_CHECK(fn(ndr2, NDR_SCALARS|NDR_BUFFERS, base));
NDR_CHECK(ndr_push_subcontext_header(ndr, sub_size, ndr2));
NDR_CHECK(ndr_push_bytes(ndr, ndr2->data, ndr2->offset));
return NT_STATUS_OK;
}
/*
handle subcontext buffers for function that take a union
*/
NTSTATUS ndr_push_subcontext_union_fn(struct ndr_push *ndr, size_t sub_size,
uint32_t level, void *base, ndr_push_union_fn_t fn)
{
struct ndr_push *ndr2;
ndr2 = ndr_push_init_ctx(ndr);
if (!ndr2) return NT_STATUS_NO_MEMORY;
ndr2->flags = ndr->flags;
NDR_CHECK(fn(ndr2, NDR_SCALARS|NDR_BUFFERS, level, base));
NDR_CHECK(ndr_push_subcontext_header(ndr, sub_size, ndr2));
NDR_CHECK(ndr_push_bytes(ndr, ndr2->data, ndr2->offset));
return NT_STATUS_OK;
}
/*
mark the start of a structure
*/
NTSTATUS ndr_pull_struct_start(struct ndr_pull *ndr)
{
return NT_STATUS_OK;
}
/*
mark the end of a structure
*/
void ndr_pull_struct_end(struct ndr_pull *ndr)
{
}
/*
mark the start of a structure
*/
NTSTATUS ndr_push_struct_start(struct ndr_push *ndr)
{
return NT_STATUS_OK;
}
/*
mark the end of a structure
*/
void ndr_push_struct_end(struct ndr_push *ndr)
{
}
/*
store a token in the ndr context, for later retrieval
*/
static NTSTATUS ndr_token_store(TALLOC_CTX *mem_ctx,
struct ndr_token_list **list,
const void *key,
uint32_t value)
{
struct ndr_token_list *tok;
tok = talloc_p(mem_ctx, struct ndr_token_list);
if (tok == NULL) {
return NT_STATUS_NO_MEMORY;
}
tok->key = key;
tok->value = value;
DLIST_ADD((*list), tok);
return NT_STATUS_OK;
}
/*
retrieve a token from a ndr context
*/
static NTSTATUS ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
{
struct ndr_token_list *tok;
for (tok=*list;tok;tok=tok->next) {
if (tok->key == key) {
DLIST_REMOVE((*list), tok);
*v = tok->value;
return NT_STATUS_OK;
}
}
return ndr_map_error(NDR_ERR_TOKEN);
}
/*
peek at but don't removed a token from a ndr context
*/
static uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
{
struct ndr_token_list *tok;
for (tok=*list;tok;tok=tok->next) {
if (tok->key == key) {
return tok->value;
}
}
return 0;
}
/*
pull an array size field and add it to the array_size_list token list
*/
NTSTATUS ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
{
uint32_t size;
NDR_CHECK(ndr_pull_uint32(ndr, &size));
return ndr_token_store(ndr, &ndr->array_size_list, p, size);
}
/*
get the stored array size field
*/
uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p)
{
return ndr_token_peek(&ndr->array_size_list, p);
}
/*
check the stored array size field
*/
NTSTATUS ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size)
{
uint32_t stored;
NDR_CHECK(ndr_token_retrieve(&ndr->array_size_list, p, &stored));
if (stored != size) {
return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
"Bad array size - got %u expected %u\n",
stored, size);
}
return NT_STATUS_OK;
}
/*
pull an array length field and add it to the array_length_list token list
*/
NTSTATUS ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
{
uint32_t length, offset;
NDR_CHECK(ndr_pull_uint32(ndr, &offset));
if (offset != 0) {
return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
"non-zero array offset %u\n", offset);
}
NDR_CHECK(ndr_pull_uint32(ndr, &length));
return ndr_token_store(ndr, &ndr->array_length_list, p, length);
}
/*
get the stored array length field
*/
uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p)
{
return ndr_token_peek(&ndr->array_length_list, p);
}
/*
check the stored array length field
*/
NTSTATUS ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
{
uint32_t stored;
NDR_CHECK(ndr_token_retrieve(&ndr->array_length_list, p, &stored));
if (stored != length) {
return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
"Bad array length - got %u expected %u\n",
stored, length);
}
return NT_STATUS_OK;
}
/*
pull a relative object - stage1
called during SCALARS processing
*/
NTSTATUS ndr_pull_relative1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset)
{
if (ndr->flags & LIBNDR_FLAG_RELATIVE_CURRENT) {
return ndr_token_store(ndr, &ndr->relative_list, p,
rel_offset + ndr->offset - 4);
} else {
return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
}
}
/*
pull a relative object - stage2
called during BUFFERS processing
*/
NTSTATUS ndr_pull_relative2(struct ndr_pull *ndr, const void *p)
{
uint32_t rel_offset;
NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset));
return ndr_pull_set_offset(ndr, rel_offset);
}
/*
push a relative object - stage1
this is called during SCALARS processing
*/
NTSTATUS ndr_push_relative1(struct ndr_push *ndr, const void *p)
{
if (p == NULL) {
NDR_CHECK(ndr_push_uint32(ndr, 0));
return NT_STATUS_OK;
}
NDR_CHECK(ndr_push_align(ndr, 4));
NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
return ndr_push_uint32(ndr, 0xFFFFFFFF);
}
/*
push a relative object - stage2
this is called during buffers processing
*/
NTSTATUS ndr_push_relative2(struct ndr_push *ndr, const void *p)
{
struct ndr_push_save save;
if (p == NULL) {
return NT_STATUS_OK;
}
NDR_CHECK(ndr_push_align(ndr, 4));
ndr_push_save(ndr, &save);
NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ndr->offset));
if (ndr->flags & LIBNDR_FLAG_RELATIVE_CURRENT) {
NDR_CHECK(ndr_push_uint32(ndr, save.offset - ndr->offset));
} else {
NDR_CHECK(ndr_push_uint32(ndr, save.offset));
}
ndr_push_restore(ndr, &save);
return NT_STATUS_OK;
}
/*
pull a union from a blob using NDR
*/
NTSTATUS ndr_pull_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, uint32_t level, void *p,
ndr_pull_union_fn_t fn)
{
struct ndr_pull *ndr;
ndr = ndr_pull_init_blob(blob, mem_ctx);
if (!ndr) {
return NT_STATUS_NO_MEMORY;
}
return fn(ndr, NDR_SCALARS|NDR_BUFFERS, level, p);
}
/*
pull a struct from a blob using NDR
*/
NTSTATUS ndr_pull_struct_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
ndr_pull_flags_fn_t fn)
{
struct ndr_pull *ndr;
ndr = ndr_pull_init_blob(blob, mem_ctx);
if (!ndr) {
return NT_STATUS_NO_MEMORY;
}
return fn(ndr, NDR_SCALARS|NDR_BUFFERS, p);
}
/*
push a struct to a blob using NDR
*/
NTSTATUS ndr_push_struct_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
ndr_push_flags_fn_t fn)
{
NTSTATUS status;
struct ndr_push *ndr;
ndr = ndr_push_init_ctx(mem_ctx);
if (!ndr) {
return NT_STATUS_NO_MEMORY;
}
status = fn(ndr, NDR_SCALARS|NDR_BUFFERS, p);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
*blob = ndr_push_blob(ndr);
return NT_STATUS_OK;
}