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samba-mirror/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 3 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, see <http://www.gnu.org/licenses/>.
*/
/*
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 "librpc/ndr/libndr.h"
#include "../lib/util/dlinklist.h"
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#if _SAMBA_BUILD_ == 4
#include "param/param.h"
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#endif
#define NDR_BASE_MARSHALL_SIZE 1024
/* this guid indicates NDR encoding in a protocol tower */
const struct ndr_syntax_id ndr_transfer_syntax = {
{ 0x8a885d04, 0x1ceb, 0x11c9, {0x9f, 0xe8}, {0x08,0x00,0x2b,0x10,0x48,0x60} },
2
};
const struct ndr_syntax_id ndr64_transfer_syntax = {
{ 0x71710533, 0xbeba, 0x4937, {0x83, 0x19}, {0xb5,0xdb,0xef,0x9c,0xcc,0x36} },
1
};
/*
work out the number of bytes needed to align on a n byte boundary
*/
_PUBLIC_ 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
*/
_PUBLIC_ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience)
{
struct ndr_pull *ndr;
ndr = talloc_zero(mem_ctx, struct ndr_pull);
if (!ndr) return NULL;
ndr->current_mem_ctx = mem_ctx;
ndr->data = blob->data;
ndr->data_size = blob->length;
ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
return ndr;
}
/*
advance by 'size' bytes
*/
_PUBLIC_ enum ndr_err_code 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 NDR_ERR_SUCCESS;
}
/*
set the parse offset to 'ofs'
*/
static enum ndr_err_code 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 NDR_ERR_SUCCESS;
}
/* create a ndr_push structure, ready for some marshalling */
_PUBLIC_ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience)
{
struct ndr_push *ndr;
ndr = talloc_zero(mem_ctx, struct ndr_push);
if (!ndr) {
return NULL;
}
ndr->flags = 0;
ndr->alloc_size = NDR_BASE_MARSHALL_SIZE;
ndr->data = talloc_array(ndr, uint8_t, ndr->alloc_size);
if (!ndr->data) {
return NULL;
}
ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
return ndr;
}
/* return a DATA_BLOB structure for the current ndr_push marshalled data */
_PUBLIC_ DATA_BLOB ndr_push_blob(struct ndr_push *ndr)
{
DATA_BLOB blob;
blob = data_blob_const(ndr->data, ndr->offset);
if (ndr->alloc_size > ndr->offset) {
ndr->data[ndr->offset] = 0;
}
return blob;
}
/*
expand the available space in the buffer to ndr->offset + extra_size
*/
_PUBLIC_ enum ndr_err_code ndr_push_expand(struct ndr_push *ndr, uint32_t extra_size)
{
uint32_t size = extra_size + ndr->offset;
if (size < ndr->offset) {
/* extra_size overflowed the offset */
return ndr_push_error(ndr, NDR_ERR_BUFSIZE, "Overflow in push_expand to %u",
size);
}
if (ndr->alloc_size > size) {
return NDR_ERR_SUCCESS;
}
ndr->alloc_size += NDR_BASE_MARSHALL_SIZE;
if (size+1 > ndr->alloc_size) {
ndr->alloc_size = size+1;
}
ndr->data = talloc_realloc(ndr, ndr->data, uint8_t, ndr->alloc_size);
if (!ndr->data) {
return ndr_push_error(ndr, NDR_ERR_ALLOC, "Failed to push_expand to %u",
ndr->alloc_size);
}
return NDR_ERR_SUCCESS;
}
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_PUBLIC_ void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...)
{
va_list ap;
char *s = NULL;
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int i, ret;
va_start(ap, format);
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ret = vasprintf(&s, format, ap);
va_end(ap);
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if (ret == -1) {
return;
}
for (i=0;i<ndr->depth;i++) {
DEBUGADD(1,(" "));
}
DEBUGADD(1,("%s\n", s));
free(s);
}
_PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...)
{
va_list ap;
int i;
for (i=0;i<ndr->depth;i++) {
ndr->private_data = talloc_asprintf_append_buffer(
(char *)ndr->private_data, " ");
}
va_start(ap, format);
ndr->private_data = talloc_vasprintf_append_buffer((char *)ndr->private_data,
format, ap);
va_end(ap);
ndr->private_data = talloc_asprintf_append_buffer((char *)ndr->private_data,
"\n");
}
/*
a useful helper function for printing idl structures via DEBUG()
*/
_PUBLIC_ void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr)
{
struct ndr_print *ndr;
DEBUG(1,(" "));
ndr = talloc_zero(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()
*/
_PUBLIC_ void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
{
struct ndr_print *ndr;
DEBUG(1,(" "));
ndr = talloc_zero(NULL, struct ndr_print);
if (!ndr) return;
ndr->print = ndr_print_debug_helper;
ndr->depth = 1;
ndr->flags = 0;
ndr_print_set_switch_value(ndr, ptr, level);
fn(ndr, name, ptr);
talloc_free(ndr);
}
/*
a useful helper function for printing idl function calls via DEBUG()
*/
_PUBLIC_ void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
{
struct ndr_print *ndr;
DEBUG(1,(" "));
ndr = talloc_zero(NULL, struct ndr_print);
if (!ndr) return;
ndr->print = ndr_print_debug_helper;
ndr->depth = 1;
ndr->flags = 0;
/* this is a s4 hack until we build up the courage to pass
* this all the way down
*/
#if _SAMBA_BUILD_ == 4
ndr->iconv_convenience = smb_iconv_convenience_init(talloc_autofree_context(), "ASCII", "UTF-8", true);
#endif
fn(ndr, name, flags, ptr);
talloc_free(ndr);
}
/*
a useful helper function for printing idl structures to a string
*/
_PUBLIC_ char *ndr_print_struct_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, void *ptr)
{
struct ndr_print *ndr;
char *ret = NULL;
ndr = talloc_zero(mem_ctx, struct ndr_print);
if (!ndr) return NULL;
ndr->private_data = talloc_strdup(ndr, "");
if (!ndr->private_data) {
goto failed;
}
ndr->print = ndr_print_string_helper;
ndr->depth = 1;
ndr->flags = 0;
/* this is a s4 hack until we build up the courage to pass
* this all the way down
*/
#if _SAMBA_BUILD_ == 4
ndr->iconv_convenience = smb_iconv_convenience_init(talloc_autofree_context(), "ASCII", "UTF-8", true);
#endif
fn(ndr, name, ptr);
ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
failed:
talloc_free(ndr);
return ret;
}
/*
a useful helper function for printing idl unions to a string
*/
_PUBLIC_ char *ndr_print_union_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
{
struct ndr_print *ndr;
char *ret = NULL;
ndr = talloc_zero(mem_ctx, struct ndr_print);
if (!ndr) return NULL;
ndr->private_data = talloc_strdup(ndr, "");
if (!ndr->private_data) {
goto failed;
}
ndr->print = ndr_print_string_helper;
ndr->depth = 1;
ndr->flags = 0;
ndr_print_set_switch_value(ndr, ptr, level);
fn(ndr, name, ptr);
ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
failed:
talloc_free(ndr);
return ret;
}
/*
a useful helper function for printing idl function calls to a string
*/
_PUBLIC_ char *ndr_print_function_string(TALLOC_CTX *mem_ctx,
ndr_print_function_t fn, const char *name,
int flags, void *ptr)
{
struct ndr_print *ndr;
char *ret = NULL;
ndr = talloc_zero(mem_ctx, struct ndr_print);
if (!ndr) return NULL;
ndr->private_data = talloc_strdup(ndr, "");
if (!ndr->private_data) {
goto failed;
}
ndr->print = ndr_print_string_helper;
ndr->depth = 1;
ndr->flags = 0;
fn(ndr, name, flags, ptr);
ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
failed:
talloc_free(ndr);
return ret;
}
_PUBLIC_ 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;
(*pflags) &= ~LIBNDR_FLAG_NDR64;
}
if (new_flags & LIBNDR_FLAG_BIGENDIAN) {
(*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN;
(*pflags) &= ~LIBNDR_FLAG_NDR64;
}
if (new_flags & LIBNDR_FLAG_REMAINING) {
(*pflags) &= ~LIBNDR_ALIGN_FLAGS;
}
if (new_flags & LIBNDR_ALIGN_FLAGS) {
(*pflags) &= ~LIBNDR_FLAG_REMAINING;
}
if (new_flags & LIBNDR_FLAG_NO_RELATIVE_REVERSE) {
(*pflags) &= ~LIBNDR_FLAG_RELATIVE_REVERSE;
}
(*pflags) |= new_flags;
}
/*
return and possibly log an NDR error
*/
_PUBLIC_ enum ndr_err_code ndr_pull_error(struct ndr_pull *ndr,
enum ndr_err_code ndr_err,
const char *format, ...)
{
char *s=NULL;
va_list ap;
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int ret;
va_start(ap, format);
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ret = vasprintf(&s, format, ap);
va_end(ap);
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if (ret == -1) {
return NDR_ERR_ALLOC;
}
DEBUG(1,("ndr_pull_error(%u): %s\n", ndr_err, s));
free(s);
return ndr_err;
}
/*
return and possibly log an NDR error
*/
_PUBLIC_ enum ndr_err_code ndr_push_error(struct ndr_push *ndr,
enum ndr_err_code ndr_err,
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const char *format, ...)
{
char *s=NULL;
va_list ap;
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int ret;
va_start(ap, format);
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ret = vasprintf(&s, format, ap);
va_end(ap);
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if (ret == -1) {
return NDR_ERR_ALLOC;
}
DEBUG(1,("ndr_push_error(%u): %s\n", ndr_err, s));
free(s);
return ndr_err;
}
/*
handle subcontext buffers, which in midl land are user-marshalled, but
we use magic in pidl to make them easier to cope with
*/
_PUBLIC_ enum ndr_err_code ndr_pull_subcontext_start(struct ndr_pull *ndr,
struct ndr_pull **_subndr,
size_t header_size,
ssize_t size_is)
{
struct ndr_pull *subndr;
uint32_t r_content_size;
bool force_le = false;
bool force_be = false;
switch (header_size) {
case 0: {
uint32_t content_size = ndr->data_size - ndr->offset;
if (size_is >= 0) {
content_size = size_is;
}
r_content_size = content_size;
break;
}
case 2: {
uint16_t content_size;
NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &content_size));
if (size_is >= 0 && size_is != content_size) {
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
(int)size_is, (int)content_size);
}
r_content_size = content_size;
break;
}
case 4: {
uint32_t content_size;
NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &content_size));
if (size_is >= 0 && size_is != content_size) {
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
(int)size_is, (int)content_size);
}
r_content_size = content_size;
break;
}
case 0xFFFFFC01: {
/*
* Common Type Header for the Serialization Stream
* See [MS-RPCE] 2.2.6 Type Serialization Version 1
*/
uint8_t version;
uint8_t drep;
uint16_t hdrlen;
uint32_t filler;
uint32_t content_size;
uint32_t reserved;
/* version */
NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &version));
if (version != 1) {
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
"Bad subcontext (PULL) Common Type Header version %d != 1",
(int)version);
}
/*
* 0x10 little endian
* 0x00 big endian
*/
NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &drep));
if (drep == 0x10) {
force_le = true;
} else if (drep == 0x00) {
force_be = true;
} else {
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
"Bad subcontext (PULL) Common Type Header invalid drep 0x%02X",
(unsigned int)drep);
}
/* length of the "Private Header for Constructed Type" */
NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &hdrlen));
if (hdrlen != 8) {
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
"Bad subcontext (PULL) Common Type Header length %d != 8",
(int)hdrlen);
}
/* filler should be ignored */
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &filler));
/*
* Private Header for Constructed Type
*/
/* length - will be updated latter */
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
if (size_is >= 0 && size_is != content_size) {
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
(int)size_is, (int)content_size);
}
/* the content size must be a multiple of 8 */
if ((content_size % 8) != 0) {
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
"Bad subcontext (PULL) size_is(%d) not padded to 8 content_size %d",
(int)size_is, (int)content_size);
}
r_content_size = content_size;
/* reserved */
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &reserved));
break;
}
default:
return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) header_size %d",
(int)header_size);
}
NDR_PULL_NEED_BYTES(ndr, r_content_size);
subndr = talloc_zero(ndr, struct ndr_pull);
NDR_ERR_HAVE_NO_MEMORY(subndr);
subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
subndr->current_mem_ctx = ndr->current_mem_ctx;
subndr->data = ndr->data + ndr->offset;
subndr->offset = 0;
subndr->data_size = r_content_size;
subndr->iconv_convenience = talloc_reference(subndr, ndr->iconv_convenience);
if (force_le) {
ndr_set_flags(&ndr->flags, LIBNDR_FLAG_LITTLE_ENDIAN);
} else if (force_be) {
ndr_set_flags(&ndr->flags, LIBNDR_FLAG_BIGENDIAN);
}
*_subndr = subndr;
return NDR_ERR_SUCCESS;
}
_PUBLIC_ enum ndr_err_code ndr_pull_subcontext_end(struct ndr_pull *ndr,
struct ndr_pull *subndr,
size_t header_size,
ssize_t size_is)
{
uint32_t advance;
if (size_is >= 0) {
advance = size_is;
} else if (header_size > 0) {
advance = subndr->data_size;
} else {
advance = subndr->offset;
}
NDR_CHECK(ndr_pull_advance(ndr, advance));
return NDR_ERR_SUCCESS;
}
_PUBLIC_ enum ndr_err_code ndr_push_subcontext_start(struct ndr_push *ndr,
struct ndr_push **_subndr,
size_t header_size,
ssize_t size_is)
{
struct ndr_push *subndr;
subndr = ndr_push_init_ctx(ndr, ndr->iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(subndr);
subndr->flags = ndr->flags & ~LIBNDR_FLAG_NDR64;
if (size_is > 0) {
NDR_CHECK(ndr_push_zero(subndr, size_is));
subndr->offset = 0;
}
*_subndr = subndr;
return NDR_ERR_SUCCESS;
}
/*
push a subcontext header
*/
_PUBLIC_ enum ndr_err_code ndr_push_subcontext_end(struct ndr_push *ndr,
struct ndr_push *subndr,
size_t header_size,
ssize_t size_is)
{
ssize_t padding_len;
if (size_is >= 0) {
padding_len = size_is - subndr->offset;
if (padding_len < 0) {
return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PUSH) content_size %d is larger than size_is(%d)",
(int)subndr->offset, (int)size_is);
}
subndr->offset = size_is;
}
switch (header_size) {
case 0:
break;
case 2:
NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, subndr->offset));
break;
case 4:
NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, subndr->offset));
break;
case 0xFFFFFC01:
/*
* Common Type Header for the Serialization Stream
* See [MS-RPCE] 2.2.6 Type Serialization Version 1
*/
padding_len = NDR_ROUND(subndr->offset, 8) - subndr->offset;
if (padding_len > 0) {
NDR_CHECK(ndr_push_zero(subndr, padding_len));
}
/* version */
NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, 1));
/*
* 0x10 little endian
* 0x00 big endian
*/
NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, NDR_BE(ndr)?0x00:0x10));
/* length of the "Private Header for Constructed Type" */
NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 8));
/* filler */
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0xCCCCCCCC));
/*
* Private Header for Constructed Type
*/
/* length - will be updated latter */
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
/* reserved */
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
break;
default:
return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext header size %d",
(int)header_size);
}
NDR_CHECK(ndr_push_bytes(ndr, subndr->data, subndr->offset));
return NDR_ERR_SUCCESS;
}
/*
store a token in the ndr context, for later retrieval
*/
_PUBLIC_ enum ndr_err_code 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(mem_ctx, struct ndr_token_list);
NDR_ERR_HAVE_NO_MEMORY(tok);
tok->key = key;
tok->value = value;
DLIST_ADD((*list), tok);
return NDR_ERR_SUCCESS;
}
/*
retrieve a token from a ndr context, using cmp_fn to match the tokens
*/
_PUBLIC_ enum ndr_err_code ndr_token_retrieve_cmp_fn(struct ndr_token_list **list, const void *key, uint32_t *v,
comparison_fn_t _cmp_fn, bool _remove_tok)
{
struct ndr_token_list *tok;
for (tok=*list;tok;tok=tok->next) {
if (_cmp_fn && _cmp_fn(tok->key,key)==0) goto found;
else if (!_cmp_fn && tok->key == key) goto found;
}
return NDR_ERR_TOKEN;
found:
*v = tok->value;
if (_remove_tok) {
DLIST_REMOVE((*list), tok);
talloc_free(tok);
}
return NDR_ERR_SUCCESS;
}
/*
retrieve a token from a ndr context
*/
_PUBLIC_ enum ndr_err_code ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
{
return ndr_token_retrieve_cmp_fn(list, key, v, NULL, true);
}
/*
peek at but don't removed a token from a ndr context
*/
_PUBLIC_ uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
{
enum ndr_err_code status;
uint32_t v;
status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, false);
if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
return 0;
}
return v;
}
/*
pull an array size field and add it to the array_size_list token list
*/
_PUBLIC_ enum ndr_err_code ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
{
uint32_t size;
NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &size));
return ndr_token_store(ndr, &ndr->array_size_list, p, size);
}
/*
get the stored array size field
*/
_PUBLIC_ 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
*/
_PUBLIC_ enum ndr_err_code ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size)
{
uint32_t stored;
stored = ndr_token_peek(&ndr->array_size_list, p);
if (stored != size) {
return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
"Bad array size - got %u expected %u\n",
stored, size);
}
return NDR_ERR_SUCCESS;
}
/*
pull an array length field and add it to the array_length_list token list
*/
_PUBLIC_ enum ndr_err_code ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
{
uint32_t length, offset;
NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &offset));
if (offset != 0) {
return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
"non-zero array offset %u\n", offset);
}
NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &length));
return ndr_token_store(ndr, &ndr->array_length_list, p, length);
}
/*
get the stored array length field
*/
_PUBLIC_ 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
*/
_PUBLIC_ enum ndr_err_code ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
{
uint32_t stored;
stored = ndr_token_peek(&ndr->array_length_list, p);
if (stored != length) {
return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
"Bad array length - got %u expected %u\n",
stored, length);
}
return NDR_ERR_SUCCESS;
}
/*
store a switch value
*/
_PUBLIC_ enum ndr_err_code ndr_push_set_switch_value(struct ndr_push *ndr, const void *p, uint32_t val)
{
return ndr_token_store(ndr, &ndr->switch_list, p, val);
}
_PUBLIC_ enum ndr_err_code ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val)
{
return ndr_token_store(ndr, &ndr->switch_list, p, val);
}
_PUBLIC_ enum ndr_err_code ndr_print_set_switch_value(struct ndr_print *ndr, const void *p, uint32_t val)
{
return ndr_token_store(ndr, &ndr->switch_list, p, val);
}
/*
retrieve a switch value
*/
_PUBLIC_ uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p)
{
return ndr_token_peek(&ndr->switch_list, p);
}
_PUBLIC_ uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p)
{
return ndr_token_peek(&ndr->switch_list, p);
}
_PUBLIC_ uint32_t ndr_print_get_switch_value(struct ndr_print *ndr, const void *p)
{
return ndr_token_peek(&ndr->switch_list, p);
}
/*
pull a struct from a blob using NDR
*/
_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,
ndr_pull_flags_fn_t fn)
{
struct ndr_pull *ndr;
ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndr);
NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
talloc_free(ndr);
return NDR_ERR_SUCCESS;
}
/*
pull a struct from a blob using NDR - failing if all bytes are not consumed
*/
_PUBLIC_ enum ndr_err_code ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
struct smb_iconv_convenience *iconv_convenience,
void *p, ndr_pull_flags_fn_t fn)
{
struct ndr_pull *ndr;
uint32_t highest_ofs;
ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndr);
NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
if (ndr->offset > ndr->relative_highest_offset) {
highest_ofs = ndr->offset;
} else {
highest_ofs = ndr->relative_highest_offset;
}
if (highest_ofs < ndr->data_size) {
enum ndr_err_code ret;
ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
"not all bytes consumed ofs[%u] size[%u]",
highest_ofs, ndr->data_size);
talloc_free(ndr);
return ret;
}
talloc_free(ndr);
return NDR_ERR_SUCCESS;
}
/*
pull a union from a blob using NDR, given the union discriminator
*/
_PUBLIC_ enum ndr_err_code ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
struct smb_iconv_convenience *iconv_convenience, void *p,
uint32_t level, ndr_pull_flags_fn_t fn)
{
struct ndr_pull *ndr;
ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndr);
NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
talloc_free(ndr);
return NDR_ERR_SUCCESS;
}
/*
pull a union from a blob using NDR, given the union discriminator,
failing if all bytes are not consumed
*/
_PUBLIC_ enum ndr_err_code ndr_pull_union_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
struct smb_iconv_convenience *iconv_convenience, void *p,
uint32_t level, ndr_pull_flags_fn_t fn)
{
struct ndr_pull *ndr;
uint32_t highest_ofs;
ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndr);
NDR_CHECK_FREE(ndr_pull_set_switch_value(ndr, p, level));
NDR_CHECK_FREE(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
if (ndr->offset > ndr->relative_highest_offset) {
highest_ofs = ndr->offset;
} else {
highest_ofs = ndr->relative_highest_offset;
}
if (highest_ofs < ndr->data_size) {
enum ndr_err_code ret;
ret = ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
"not all bytes consumed ofs[%u] size[%u]",
highest_ofs, ndr->data_size);
talloc_free(ndr);
return ret;
}
talloc_free(ndr);
return NDR_ERR_SUCCESS;
}
/*
push a struct to a blob using NDR
*/
_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)
{
struct ndr_push *ndr;
ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndr);
NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
*blob = ndr_push_blob(ndr);
talloc_steal(mem_ctx, blob->data);
talloc_free(ndr);
return NDR_ERR_SUCCESS;
}
/*
push a union to a blob using NDR
*/
_PUBLIC_ enum ndr_err_code ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, void *p,
uint32_t level, ndr_push_flags_fn_t fn)
{
struct ndr_push *ndr;
ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndr);
NDR_CHECK(ndr_push_set_switch_value(ndr, p, level));
NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
*blob = ndr_push_blob(ndr);
talloc_steal(mem_ctx, blob->data);
talloc_free(ndr);
return NDR_ERR_SUCCESS;
}
/*
generic ndr_size_*() handler for structures
*/
_PUBLIC_ size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push, struct smb_iconv_convenience *iconv_convenience)
{
struct ndr_push *ndr;
enum ndr_err_code status;
size_t ret;
/* avoid recursion */
if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
ndr = ndr_push_init_ctx(NULL, iconv_convenience);
if (!ndr) return 0;
ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
status = push(ndr, NDR_SCALARS|NDR_BUFFERS, discard_const(p));
if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
talloc_free(ndr);
return 0;
}
ret = ndr->offset;
talloc_free(ndr);
return ret;
}
/*
generic ndr_size_*() handler for unions
*/
_PUBLIC_ size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push, struct smb_iconv_convenience *iconv_convenience)
{
struct ndr_push *ndr;
enum ndr_err_code status;
size_t ret;
/* avoid recursion */
if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
ndr = ndr_push_init_ctx(NULL, iconv_convenience);
if (!ndr) return 0;
ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
status = ndr_push_set_switch_value(ndr, p, level);
if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
talloc_free(ndr);
return 0;
}
status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
talloc_free(ndr);
return 0;
}
ret = ndr->offset;
talloc_free(ndr);
return ret;
}
/*
get the current base for relative pointers for the push
*/
_PUBLIC_ uint32_t ndr_push_get_relative_base_offset(struct ndr_push *ndr)
{
return ndr->relative_base_offset;
}
/*
restore the old base for relative pointers for the push
*/
_PUBLIC_ void ndr_push_restore_relative_base_offset(struct ndr_push *ndr, uint32_t offset)
{
ndr->relative_base_offset = offset;
}
/*
setup the current base for relative pointers for the push
called in the NDR_SCALAR stage
*/
_PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset1(struct ndr_push *ndr, const void *p, uint32_t offset)
{
ndr->relative_base_offset = offset;
return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
}
/*
setup the current base for relative pointers for the push
called in the NDR_BUFFERS stage
*/
_PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset2(struct ndr_push *ndr, const void *p)
{
return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
}
/*
push a relative object - stage1
this is called during SCALARS processing
*/
_PUBLIC_ enum ndr_err_code ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p)
{
if (p == NULL) {
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
return NDR_ERR_SUCCESS;
}
NDR_CHECK(ndr_push_align(ndr, 4));
NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
return ndr_push_uint32(ndr, NDR_SCALARS, 0xFFFFFFFF);
}
/*
push a short relative object - stage1
this is called during SCALARS processing
*/
_PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr1(struct ndr_push *ndr, const void *p)
{
if (p == NULL) {
NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 0));
return NDR_ERR_SUCCESS;
}
NDR_CHECK(ndr_push_align(ndr, 2));
NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
return ndr_push_uint16(ndr, NDR_SCALARS, 0xFFFF);
}
/*
push a relative object - stage2
this is called during buffers processing
*/
static enum ndr_err_code ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p)
{
uint32_t save_offset;
uint32_t ptr_offset = 0xFFFFFFFF;
if (p == NULL) {
return NDR_ERR_SUCCESS;
}
save_offset = ndr->offset;
NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
if (ptr_offset > ndr->offset) {
return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
"ndr_push_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
ptr_offset, ndr->offset);
}
ndr->offset = ptr_offset;
if (save_offset < ndr->relative_base_offset) {
return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
"ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
save_offset, ndr->relative_base_offset);
}
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
ndr->offset = save_offset;
return NDR_ERR_SUCCESS;
}
/*
push a short relative object - stage2
this is called during buffers processing
*/
_PUBLIC_ enum ndr_err_code ndr_push_short_relative_ptr2(struct ndr_push *ndr, const void *p)
{
uint32_t save_offset;
uint32_t ptr_offset = 0xFFFF;
if (p == NULL) {
return NDR_ERR_SUCCESS;
}
save_offset = ndr->offset;
NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
if (ptr_offset > ndr->offset) {
return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
"ndr_push_short_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
ptr_offset, ndr->offset);
}
ndr->offset = ptr_offset;
if (save_offset < ndr->relative_base_offset) {
return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
"ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
save_offset, ndr->relative_base_offset);
}
NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
ndr->offset = save_offset;
return NDR_ERR_SUCCESS;
}
/*
push a relative object - stage2 start
this is called during buffers processing
*/
_PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_start(struct ndr_push *ndr, const void *p)
{
if (p == NULL) {
return NDR_ERR_SUCCESS;
}
if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
return ndr_push_relative_ptr2(ndr, p);
}
return ndr_push_error(ndr, NDR_ERR_RELATIVE,
"ndr_push_relative_ptr2_start RELATIVE_REVERSE flag set, but not supported");
}
/*
push a relative object - stage2 end
this is called during buffers processing
*/
_PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2_end(struct ndr_push *ndr, const void *p)
{
if (p == NULL) {
return NDR_ERR_SUCCESS;
}
return NDR_ERR_SUCCESS;
}
/*
get the current base for relative pointers for the pull
*/
_PUBLIC_ uint32_t ndr_pull_get_relative_base_offset(struct ndr_pull *ndr)
{
return ndr->relative_base_offset;
}
/*
restore the old base for relative pointers for the pull
*/
_PUBLIC_ void ndr_pull_restore_relative_base_offset(struct ndr_pull *ndr, uint32_t offset)
{
ndr->relative_base_offset = offset;
}
/*
setup the current base for relative pointers for the pull
called in the NDR_SCALAR stage
*/
_PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset1(struct ndr_pull *ndr, const void *p, uint32_t offset)
{
ndr->relative_base_offset = offset;
return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
}
/*
setup the current base for relative pointers for the pull
called in the NDR_BUFFERS stage
*/
_PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset2(struct ndr_pull *ndr, const void *p)
{
return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
}
/*
pull a relative object - stage1
called during SCALARS processing
*/
_PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset)
{
rel_offset += ndr->relative_base_offset;
if (rel_offset > ndr->data_size) {
return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
"ndr_pull_relative_ptr1 rel_offset(%u) > ndr->data_size(%u)",
rel_offset, ndr->data_size);
}
return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
}
/*
pull a relative object - stage2
called during BUFFERS processing
*/
_PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr2(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);
}
const static struct {
enum ndr_err_code err;
const char *string;
} ndr_err_code_strings[] = {
{ NDR_ERR_SUCCESS, "Success" },
{ NDR_ERR_ARRAY_SIZE, "Bad Array Size" },
{ NDR_ERR_BAD_SWITCH, "Bad Switch" },
{ NDR_ERR_OFFSET, "Offset Error" },
{ NDR_ERR_RELATIVE, "Relative Pointer Error" },
{ NDR_ERR_CHARCNV, "Character Conversion Error" },
{ NDR_ERR_LENGTH, "Length Error" },
{ NDR_ERR_SUBCONTEXT, "Subcontext Error" },
{ NDR_ERR_COMPRESSION, "Compression Error" },
{ NDR_ERR_STRING, "String Error" },
{ NDR_ERR_VALIDATE, "Validate Error" },
{ NDR_ERR_BUFSIZE, "Buffer Size Error" },
{ NDR_ERR_ALLOC, "Allocation Error" },
{ NDR_ERR_RANGE, "Range Error" },
{ NDR_ERR_TOKEN, "Token Error" },
{ NDR_ERR_IPV4ADDRESS, "IPv4 Address Error" },
{ NDR_ERR_INVALID_POINTER, "Invalid Pointer" },
{ NDR_ERR_UNREAD_BYTES, "Unread Bytes" },
{ NDR_ERR_NDR64, "NDR64 assertion error" },
{ 0, NULL }
};
_PUBLIC_ const char *ndr_map_error2string(enum ndr_err_code ndr_err)
{
int i;
for (i = 0; ndr_err_code_strings[i].string != NULL; i++) {
if (ndr_err_code_strings[i].err == ndr_err)
return ndr_err_code_strings[i].string;
}
return "Unknown error";
}