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authorJeremy Allison <jra@samba.org>2006-07-11 18:01:26 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 11:19:14 -0500
commitfbdcf2663b56007a438ac4f0d8d82436b1bfe688 (patch)
tree4e42c1f061391cea3d640152fd240682cbf4fd9a /source3/libndr/ndr.c
parent5bf62a0c3cc95abe918f3e772bb10e0a90fdce22 (diff)
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r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need
to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
Diffstat (limited to 'source3/libndr/ndr.c')
-rw-r--r--source3/libndr/ndr.c961
1 files changed, 961 insertions, 0 deletions
diff --git a/source3/libndr/ndr.c b/source3/libndr/ndr.c
new file mode 100644
index 0000000000..2aff7a88f0
--- /dev/null
+++ b/source3/libndr/ndr.c
@@ -0,0 +1,961 @@
+/*
+ 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"
+
+#define NDR_BASE_MARSHALL_SIZE 1024
+
+/* this guid indicates NDR encoding in a protocol tower */
+const struct dcerpc_syntax_id ndr_transfer_syntax = {
+ { 0x8a885d04, 0x1ceb, 0x11c9, {0x9f, 0xe8}, {0x08,0x00,0x2b,0x10,0x48,0x60} },
+ 2
+};
+
+const struct dcerpc_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
+*/
+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(mem_ctx, struct ndr_pull);
+ if (!ndr) return NULL;
+ ndr->current_mem_ctx = mem_ctx;
+
+ ndr->data = blob->data;
+ ndr->data_size = blob->length;
+
+ return ndr;
+}
+
+/*
+ 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'
+*/
+static 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(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;
+ }
+
+ 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;
+ blob.free = NULL;
+ if (ndr->alloc_size > ndr->offset) {
+ ndr->data[ndr->offset] = 0;
+ }
+ 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+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 NT_STATUS_OK;
+}
+
+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);
+}
+
+static void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...) _PRINTF_ATTRIBUTE(2,3)
+{
+ va_list ap;
+ int i;
+
+ for (i=0;i<ndr->depth;i++) {
+ ndr->private_data = talloc_asprintf_append(ndr->private_data, " ");
+ }
+
+ va_start(ap, format);
+ ndr->private_data = talloc_vasprintf_append(ndr->private_data, format, ap);
+ va_end(ap);
+ ndr->private_data = talloc_asprintf_append(ndr->private_data, "\n");
+}
+
+/*
+ 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_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()
+*/
+void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
+{
+ struct ndr_print *ndr;
+
+ 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()
+*/
+void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
+{
+ struct ndr_print *ndr;
+
+ 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, flags, ptr);
+ talloc_free(ndr);
+}
+
+
+/*
+ a useful helper function for printing idl function calls to a string
+*/
+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;
+ if (!(ndr->private_data = talloc_strdup(mem_ctx, ""))) {
+ TALLOC_FREE(ndr);
+ return NULL;
+ }
+ ndr->print = ndr_print_string_helper;
+ ndr->depth = 1;
+ ndr->flags = 0;
+ fn(ndr, name, flags, ptr);
+ ret = ndr->private_data;
+ talloc_free(ndr);
+ return ret;
+}
+
+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;
+ }
+ if (new_flags & LIBNDR_FLAG_REMAINING) {
+ (*pflags) &= ~LIBNDR_ALIGN_FLAGS;
+ }
+ if (new_flags & LIBNDR_ALIGN_FLAGS) {
+ (*pflags) &= ~LIBNDR_FLAG_REMAINING;
+ }
+ (*pflags) |= new_flags;
+}
+
+static NTSTATUS ndr_map_error(enum ndr_err_code ndr_err)
+{
+ switch (ndr_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 map 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 ndr_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", ndr_err, s));
+
+ free(s);
+
+ return ndr_map_error(ndr_err);
+}
+
+/*
+ return and possibly log an NDR error
+*/
+NTSTATUS ndr_push_error(struct ndr_push *ndr,
+ enum ndr_err_code ndr_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", ndr_err, s));
+
+ free(s);
+
+ return ndr_map_error(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
+*/
+NTSTATUS 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;
+
+ 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_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);
+ }
+ r_content_size = content_size;
+ 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);
+ NT_STATUS_HAVE_NO_MEMORY(subndr);
+ subndr->flags = ndr->flags;
+ subndr->current_mem_ctx = ndr->current_mem_ctx;
+
+ subndr->data = ndr->data + ndr->offset;
+ subndr->offset = 0;
+ subndr->data_size = r_content_size;
+
+ *_subndr = subndr;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS 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 NT_STATUS_OK;
+}
+
+NTSTATUS 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);
+ NT_STATUS_HAVE_NO_MEMORY(subndr);
+ subndr->flags = ndr->flags;
+
+ *_subndr = subndr;
+ return NT_STATUS_OK;
+}
+
+/*
+ push a subcontext header
+*/
+NTSTATUS ndr_push_subcontext_end(struct ndr_push *ndr,
+ struct ndr_push *subndr,
+ size_t header_size,
+ ssize_t size_is)
+{
+ if (size_is >= 0) {
+ ssize_t padding_len = size_is - subndr->offset;
+ if (padding_len > 0) {
+ NDR_CHECK(ndr_push_zero(subndr, padding_len));
+ } else 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);
+ }
+ }
+
+ 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_uint32(ndr, NDR_SCALARS, subndr->offset));
+ 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 NT_STATUS_OK;
+}
+
+/*
+ store a token in the ndr context, for later retrieval
+*/
+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(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, using cmp_fn to match the tokens
+*/
+NTSTATUS 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_map_error(NDR_ERR_TOKEN);
+found:
+ *v = tok->value;
+ if (_remove_tok) {
+ DLIST_REMOVE((*list), tok);
+ talloc_free(tok);
+ }
+ return NT_STATUS_OK;
+}
+
+/*
+ retrieve a token from a ndr context
+*/
+NTSTATUS 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
+*/
+uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
+{
+ NTSTATUS status;
+ uint32_t v;
+ status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, False);
+ if (NT_STATUS_IS_OK(status)) return v;
+ 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, NDR_SCALARS, &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;
+ 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 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, 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_uint32(ndr, NDR_SCALARS, &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;
+ 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 NT_STATUS_OK;
+}
+
+/*
+ store a switch value
+ */
+NTSTATUS 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);
+}
+
+NTSTATUS 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);
+}
+
+NTSTATUS 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
+ */
+uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p)
+{
+ return ndr_token_peek(&ndr->switch_list, p);
+}
+
+uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p)
+{
+ return ndr_token_peek(&ndr->switch_list, p);
+}
+
+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
+*/
+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);
+}
+
+/*
+ pull a struct from a blob using NDR - failing if all bytes are not consumed
+*/
+NTSTATUS ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
+ ndr_pull_flags_fn_t fn)
+{
+ struct ndr_pull *ndr;
+ NTSTATUS status;
+
+ ndr = ndr_pull_init_blob(blob, 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;
+ if (ndr->offset != ndr->data_size) {
+ return NT_STATUS_BUFFER_TOO_SMALL;
+ }
+ return status;
+}
+
+/*
+ pull a union from a blob using NDR, given the union discriminator
+*/
+NTSTATUS ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
+ uint32_t level, ndr_pull_flags_fn_t fn)
+{
+ struct ndr_pull *ndr;
+ NTSTATUS status;
+
+ ndr = ndr_pull_init_blob(blob, mem_ctx);
+ if (!ndr) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ ndr_pull_set_switch_value(ndr, p, level);
+ status = fn(ndr, NDR_SCALARS|NDR_BUFFERS, p);
+ if (!NT_STATUS_IS_OK(status)) return status;
+ if (ndr->offset != ndr->data_size) {
+ return NT_STATUS_BUFFER_TOO_SMALL;
+ }
+ return status;
+}
+
+/*
+ push a struct to a blob using NDR
+*/
+NTSTATUS ndr_push_struct_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, const 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;
+}
+
+/*
+ push a union to a blob using NDR
+*/
+NTSTATUS ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p,
+ uint32_t level, 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;
+ }
+ ndr_push_set_switch_value(ndr, p, level);
+ 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;
+}
+
+/*
+ generic ndr_size_*() handler for structures
+*/
+size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push)
+{
+ struct ndr_push *ndr;
+ NTSTATUS status;
+ size_t ret;
+
+ /* avoid recursion */
+ if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
+
+ ndr = ndr_push_init_ctx(NULL);
+ if (!ndr) return 0;
+ ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
+ status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
+ if (!NT_STATUS_IS_OK(status)) {
+ return 0;
+ }
+ ret = ndr->offset;
+ talloc_free(ndr);
+ return ret;
+}
+
+/*
+ generic ndr_size_*() handler for unions
+*/
+size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push)
+{
+ struct ndr_push *ndr;
+ NTSTATUS status;
+ size_t ret;
+
+ /* avoid recursion */
+ if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
+
+ ndr = ndr_push_init_ctx(NULL);
+ if (!ndr) return 0;
+ ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
+ ndr_push_set_switch_value(ndr, p, level);
+ status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
+ if (!NT_STATUS_IS_OK(status)) {
+ return 0;
+ }
+ ret = ndr->offset;
+ talloc_free(ndr);
+ return ret;
+}
+
+/*
+ get the current base for relative pointers for the push
+*/
+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
+*/
+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
+*/
+NTSTATUS 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
+*/
+NTSTATUS 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
+*/
+NTSTATUS ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p)
+{
+ if (p == NULL) {
+ NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 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, NDR_SCALARS, 0xFFFFFFFF);
+}
+
+/*
+ push a relative object - stage2
+ this is called during buffers processing
+*/
+NTSTATUS ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p)
+{
+ struct ndr_push_save save;
+ uint32_t ptr_offset = 0xFFFFFFFF;
+ if (p == NULL) {
+ return NT_STATUS_OK;
+ }
+ ndr_push_save(ndr, &save);
+ 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_push_restore(ndr, &save);
+ return NT_STATUS_OK;
+}
+
+/*
+ get the current base for relative pointers for the pull
+*/
+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
+*/
+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
+*/
+NTSTATUS 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
+*/
+NTSTATUS 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
+*/
+NTSTATUS 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
+*/
+NTSTATUS 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);
+}