Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2005 insertions, 0 deletions

diff --git a/librpc/ndr/ndr.c b/librpc/ndr/ndr.c
new file mode 100644
index 0000000..2576588
--- /dev/null
+++ b/librpc/ndr/ndr.c
@@ -0,0 +1,2005 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   libndr interface
+
+   Copyright (C) Andrew Tridgell 2003
+   Copyright (C) Jelmer Vernooij 2005-2008
+
+   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 "librpc/ndr/ndr_private.h"
+#include "../lib/util/dlinklist.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_RPC_PARSE
+
+#define NDR_BASE_MARSHALL_SIZE 1024
+
+/*
+ * This value is arbitrary, but designed to reduce the memory a client
+ * can allocate and the work the client can force in processing a
+ * malicious packet.
+ *
+ * In an ideal world this would be controlled by range() restrictions
+ * on array sizes and careful IDL construction to avoid arbitary
+ * linked lists, but this is a backstop for now.
+ */
+#define NDR_TOKEN_MAX_LIST_SIZE 65535
+
+size_t ndr_token_max_list_size(void) {
+	return NDR_TOKEN_MAX_LIST_SIZE;
+};
+
+/* this guid indicates NDR encoding in a protocol tower */
+const struct ndr_syntax_id ndr_transfer_syntax_ndr = {
+  { 0x8a885d04, 0x1ceb, 0x11c9, {0x9f, 0xe8}, {0x08,0x00,0x2b,0x10,0x48,0x60} },
+  2
+};
+
+const struct ndr_syntax_id ndr_transfer_syntax_ndr64 = {
+  { 0x71710533, 0xbeba, 0x4937, {0x83, 0x19}, {0xb5,0xdb,0xef,0x9c,0xcc,0x36} },
+  1
+};
+
+const struct ndr_syntax_id ndr_syntax_id_null = {
+  { 0, 0, 0, { 0, 0 }, { 0, 0, 0, 0, 0, 0 } },
+  0
+};
+
+/*
+  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 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;
+}
+
+_PUBLIC_ enum ndr_err_code ndr_pull_append(struct ndr_pull *ndr, DATA_BLOB *blob)
+{
+	enum ndr_err_code ndr_err;
+	DATA_BLOB b;
+	uint32_t append = 0;
+	bool ok;
+
+	if (blob->length == 0) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	ndr_err = ndr_token_retrieve(&ndr->array_size_list, ndr, &append);
+	if (ndr_err == NDR_ERR_TOKEN) {
+		append = 0;
+		ndr_err = NDR_ERR_SUCCESS;
+	}
+	NDR_CHECK(ndr_err);
+
+	if (ndr->data_size == 0) {
+		ndr->data = NULL;
+		append = UINT32_MAX;
+	}
+
+	if (append == UINT32_MAX) {
+		/*
+		 * append == UINT32_MAX means that
+		 * ndr->data is either NULL or a valid
+		 * talloc child of ndr, which means
+		 * we can use data_blob_append() without
+		 * data_blob_talloc() of the existing callers data
+		 */
+		b = data_blob_const(ndr->data, ndr->data_size);
+	} else {
+		b = data_blob_talloc(ndr, ndr->data, ndr->data_size);
+		if (b.data == NULL) {
+			return ndr_pull_error(ndr, NDR_ERR_ALLOC, "%s", __location__);
+		}
+	}
+
+	ok = data_blob_append(ndr, &b, blob->data, blob->length);
+	if (!ok) {
+		return ndr_pull_error(ndr, NDR_ERR_ALLOC, "%s", __location__);
+	}
+
+	ndr->data = b.data;
+	ndr->data_size = b.length;
+
+	return ndr_token_store(ndr, &ndr->array_size_list, ndr, UINT32_MAX);
+}
+
+_PUBLIC_ enum ndr_err_code ndr_pull_pop(struct ndr_pull *ndr)
+{
+	uint32_t skip = 0;
+	uint32_t append = 0;
+	enum ndr_err_code ndr_err;
+
+	if (ndr->relative_base_offset != 0) {
+		return ndr_pull_error(ndr, NDR_ERR_RELATIVE,
+				      "%s", __location__);
+	}
+	if (ndr->relative_highest_offset != 0) {
+		return ndr_pull_error(ndr, NDR_ERR_RELATIVE,
+				      "%s", __location__);
+	}
+	if (ndr->relative_list.count != 0) {
+		return ndr_pull_error(ndr, NDR_ERR_RELATIVE,
+				      "%s", __location__);
+	}
+	if (ndr->relative_base_list.count != 0) {
+		return ndr_pull_error(ndr, NDR_ERR_RELATIVE,
+				      "%s", __location__);
+	}
+
+	/*
+	 * we need to keep up to 7 bytes
+	 * in order to get the aligment right.
+	 */
+	skip = ndr->offset & 0xFFFFFFF8;
+
+	if (skip == 0) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	ndr->offset -= skip;
+	ndr->data_size -= skip;
+
+	ndr_err = ndr_token_peek(&ndr->array_size_list, ndr, &append);
+	if (ndr_err == NDR_ERR_TOKEN) {
+		/*
+		 * here we assume, that ndr->data is not a
+		 * talloc child of ndr.
+		 */
+		ndr->data += skip;
+		return NDR_ERR_SUCCESS;
+	}
+
+	memmove(ndr->data, ndr->data + skip, ndr->data_size);
+
+	ndr->data = talloc_realloc(ndr, ndr->data, uint8_t, ndr->data_size);
+	if (ndr->data_size != 0 && ndr->data == NULL) {
+		return ndr_pull_error(ndr, NDR_ERR_ALLOC, "%s", __location__);
+	}
+
+	return NDR_ERR_SUCCESS;
+}
+
+/*
+  advance by 'size' bytes
+*/
+_PUBLIC_ enum ndr_err_code ndr_pull_advance(struct ndr_pull *ndr, uint32_t size)
+{
+	NDR_PULL_NEED_BYTES(ndr, size);
+	ndr->offset += 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 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) {
+		talloc_free(ndr);
+		return NULL;
+	}
+
+	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->fixed_buf_size) {
+		if (ndr->alloc_size >= size) {
+			return NDR_ERR_SUCCESS;
+		}
+		return ndr_push_error(ndr,
+				      NDR_ERR_BUFSIZE,
+				      "Overflow of fixed buffer 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;
+}
+
+_PUBLIC_ void ndr_print_debugc_helper(struct ndr_print *ndr, const char *format, ...)
+{
+	va_list ap;
+	char *s = NULL;
+	uint32_t i;
+	int ret;
+	int dbgc_class;
+
+	va_start(ap, format);
+	ret = vasprintf(&s, format, ap);
+	va_end(ap);
+
+	if (ret == -1) {
+		return;
+	}
+
+	dbgc_class = *(int *)ndr->private_data;
+
+	if (ndr->no_newline) {
+		DEBUGADDC(dbgc_class, 1,("%s", s));
+		free(s);
+		return;
+	}
+
+	for (i=0;i<ndr->depth;i++) {
+		DEBUGADDC(dbgc_class, 1,("    "));
+	}
+
+	DEBUGADDC(dbgc_class, 1,("%s\n", s));
+	free(s);
+}
+
+_PUBLIC_ void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...)
+{
+	va_list ap;
+	char *s = NULL;
+	uint32_t i;
+	int ret;
+
+	va_start(ap, format);
+	ret = vasprintf(&s, format, ap);
+	va_end(ap);
+
+	if (ret == -1) {
+		return;
+	}
+
+	if (ndr->no_newline) {
+		DEBUGADD(1,("%s", s));
+		free(s);
+		return;
+	}
+
+	for (i=0;i<ndr->depth;i++) {
+		DEBUGADD(1,("    "));
+	}
+
+	DEBUGADD(1,("%s\n", s));
+	free(s);
+}
+
+_PUBLIC_ void ndr_print_printf_helper(struct ndr_print *ndr, const char *format, ...)
+{
+	va_list ap;
+	uint32_t i;
+
+	if (!ndr->no_newline) {
+		for (i=0;i<ndr->depth;i++) {
+			printf("    ");
+		}
+	}
+
+	va_start(ap, format);
+	vprintf(format, ap);
+	va_end(ap);
+	if (!ndr->no_newline) {
+		printf("\n");
+	}
+}
+
+_PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...)
+{
+	va_list ap;
+	uint32_t i;
+
+	if (!ndr->no_newline) {
+		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);
+	if (!ndr->no_newline) {
+		ndr->private_data = talloc_asprintf_append_buffer((char *)ndr->private_data,
+								  "\n");
+	}
+}
+
+/*
+  a useful helper function for printing idl structures via DEBUGC()
+*/
+_PUBLIC_ void ndr_print_debugc(int dbgc_class, ndr_print_fn_t fn, const char *name, void *ptr)
+{
+	struct ndr_print *ndr;
+
+	DEBUGC(dbgc_class, 1,(" "));
+
+	ndr = talloc_zero(NULL, struct ndr_print);
+	if (!ndr) return;
+	ndr->private_data = &dbgc_class;
+	ndr->print = ndr_print_debugc_helper;
+	ndr->depth = 1;
+	ndr->flags = 0;
+#ifdef DEBUG_PASSWORD
+	if (CHECK_DEBUGLVL(100)) {
+		ndr->print_secrets = true;
+	}
+#endif
+
+	fn(ndr, name, ptr);
+	talloc_free(ndr);
+}
+
+/*
+  a useful helper function for printing idl structures via DEBUG()
+*/
+_PUBLIC_ bool ndr_print_debug(int level,
+			      ndr_print_fn_t fn,
+			      const char *name,
+			      void *ptr,
+			      const char *location,
+			      const char *function)
+{
+	struct ndr_print *ndr;
+
+	DEBUGLF(level, (" "), location, function);
+
+	ndr = talloc_zero(NULL, struct ndr_print);
+	if (!ndr) return false;
+	ndr->print = ndr_print_debug_helper;
+	ndr->depth = 1;
+	ndr->flags = 0;
+#ifdef DEBUG_PASSWORD
+	if (CHECK_DEBUGLVL(100)) {
+		ndr->print_secrets = true;
+	}
+#endif
+
+	fn(ndr, name, ptr);
+	talloc_free(ndr);
+	return true;
+}
+
+/*
+  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;
+#ifdef DEBUG_PASSWORD
+	if (CHECK_DEBUGLVL(100)) {
+		ndr->print_secrets = true;
+	}
+#endif
+
+	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;
+#ifdef DEBUG_PASSWORD
+	if (CHECK_DEBUGLVL(100)) {
+		ndr->print_secrets = 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;
+
+	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_ALIGN_FLAGS) {
+		/* Ensure we only have the passed-in
+		   align flag set in the new_flags,
+		   remove any old align flag. */
+		(*pflags) &= ~LIBNDR_ALIGN_FLAGS;
+	}
+	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 *function,
+					   const char *location,
+					   const char *format, ...)
+{
+	char *s=NULL;
+	va_list ap;
+	int ret;
+
+	if (ndr->flags & LIBNDR_FLAG_INCOMPLETE_BUFFER) {
+		switch (ndr_err) {
+		case NDR_ERR_BUFSIZE:
+			return NDR_ERR_INCOMPLETE_BUFFER;
+		default:
+			break;
+		}
+	}
+
+	va_start(ap, format);
+	ret = vasprintf(&s, format, ap);
+	va_end(ap);
+
+	if (ret == -1) {
+		return NDR_ERR_ALLOC;
+	}
+
+	D_WARNING("%s: ndr_pull_error(%s): %s at %s\n",
+		  function,
+		  ndr_map_error2string(ndr_err),
+		  s,
+		  location);
+
+	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,
+					   const char *function,
+					   const char *location,
+					   const char *format, ...)
+{
+	char *s=NULL;
+	va_list ap;
+	int ret;
+
+	va_start(ap, format);
+	ret = vasprintf(&s, format, ap);
+	va_end(ap);
+
+	if (ret == -1) {
+		return NDR_ERR_ALLOC;
+	}
+
+	D_WARNING("%s: ndr_push_error(%s): %s at %s\n",
+		  function,
+		  ndr_map_error2string(ndr_err),
+		  s,
+		  location);
+
+	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) (0x%04x) mismatch content_size %d (0x%04x)",
+						(int)size_is, (int)size_is,
+						(int)content_size,
+						(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) (0x%08x) mismatch content_size %d (0x%08x)",
+						(int)size_is, (int)size_is,
+						(int)content_size,
+						(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;
+	}
+	case 0xFFFFFFFF:
+		/*
+		 * a shallow copy like subcontext
+		 * useful for DCERPC pipe chunks.
+		 */
+		subndr = talloc_zero(ndr, struct ndr_pull);
+		NDR_ERR_HAVE_NO_MEMORY(subndr);
+
+		subndr->flags		= ndr->flags;
+		subndr->current_mem_ctx	= ndr->current_mem_ctx;
+		subndr->data		= ndr->data;
+		subndr->offset		= ndr->offset;
+		subndr->data_size	= ndr->data_size;
+
+		*_subndr = subndr;
+		return NDR_ERR_SUCCESS;
+
+	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;
+
+	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;
+	uint32_t highest_ofs;
+
+	if (header_size == 0xFFFFFFFF) {
+		advance = subndr->offset - ndr->offset;
+	} else if (size_is >= 0) {
+		advance = size_is;
+	} else if (header_size > 0) {
+		advance = subndr->data_size;
+	} else {
+		advance = subndr->offset;
+	}
+
+	if (subndr->offset > ndr->relative_highest_offset) {
+		highest_ofs = subndr->offset;
+	} else {
+		highest_ofs = subndr->relative_highest_offset;
+	}
+	if (!(subndr->flags & LIBNDR_FLAG_SUBCONTEXT_NO_UNREAD_BYTES)) {
+		/*
+		 * avoid an error unless SUBCONTEXT_NO_UNREAD_BYTES is specified
+		 */
+		highest_ofs = advance;
+	}
+	if (highest_ofs < advance) {
+		return ndr_pull_error(subndr, NDR_ERR_UNREAD_BYTES,
+				      "not all bytes consumed ofs[%u] advance[%u]",
+				      highest_ofs, advance);
+	}
+
+	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_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->relative_end_offset = size_is;
+	}
+
+	*_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;
+}
+
+
+struct ndr_token {
+	const void *key;
+	uint32_t value;
+};
+
+/*
+  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)
+{
+	if (list->tokens == NULL) {
+		list->tokens = talloc_array(mem_ctx, struct ndr_token, 10);
+		if (list->tokens == NULL) {
+			NDR_ERR_HAVE_NO_MEMORY(list->tokens);
+		}
+	} else {
+		struct ndr_token *new_tokens = NULL;
+		uint32_t alloc_count = talloc_array_length(list->tokens);
+
+		/*
+		 * Check every time we have not allocated too many
+		 * tokens.  This ensures developer sanity when
+		 * debugging the boundary condition
+		 */
+		if (list->count >= NDR_TOKEN_MAX_LIST_SIZE) {
+			return NDR_ERR_RANGE;
+		}
+		if (list->count == alloc_count) {
+			unsigned new_alloc;
+			/*
+			 * Double the list, until we start in chunks
+			 * of 1000
+			 */
+			unsigned increment = MIN(list->count, 1000);
+			new_alloc = alloc_count + increment;
+			if (new_alloc < alloc_count) {
+				return NDR_ERR_RANGE;
+			}
+			new_tokens = talloc_realloc(mem_ctx, list->tokens,
+						    struct ndr_token, new_alloc);
+			NDR_ERR_HAVE_NO_MEMORY(new_tokens);
+			list->tokens = new_tokens;
+		}
+	}
+	list->tokens[list->count].key = key;
+	list->tokens[list->count].value = value;
+	list->count++;
+	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 erase)
+{
+	struct ndr_token *tokens = list->tokens;
+	unsigned i;
+	if (_cmp_fn) {
+		for (i = list->count - 1; i < list->count; i--) {
+			if (_cmp_fn(tokens[i].key, key) == 0) {
+				goto found;
+			}
+		}
+	} else {
+		for (i = list->count - 1; i < list->count; i--) {
+			if (tokens[i].key == key) {
+				goto found;
+			}
+		}
+	}
+	return NDR_ERR_TOKEN;
+found:
+	*v = tokens[i].value;
+	if (erase) {
+		if (i != list->count - 1) {
+			tokens[i] = tokens[list->count - 1];
+		}
+		list->count--;
+	}
+	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_ enum ndr_err_code ndr_token_peek(struct ndr_token_list *list,
+					  const void *key, uint32_t *v)
+{
+	return ndr_token_retrieve_cmp_fn(list, key, v, NULL, false);
+}
+
+/*
+  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)
+{
+	enum ndr_err_code ret;
+	uint32_t size;
+	NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &size));
+	ret = ndr_token_store(ndr, &ndr->array_size_list, p, size);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_pull_error(ndr, ret,
+				      "More than %d NDR tokens stored for array_size",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+/*
+  get the stored array size field
+*/
+_PUBLIC_ enum ndr_err_code ndr_get_array_size(struct ndr_pull *ndr, const void *p, uint32_t *size)
+{
+	return ndr_token_peek(&ndr->array_size_list, p, size);
+}
+
+/*
+  get and remove from the stored list the stored array size field
+*/
+_PUBLIC_ enum ndr_err_code ndr_steal_array_size(struct ndr_pull *ndr, const void *p, uint32_t *size)
+{
+	return ndr_token_retrieve(&ndr->array_size_list, p, size);
+}
+
+/*
+ * check the stored array size field and remove from the stored list
+ * (the array_size NDR token list).  We try to remove when possible to
+ * avoid the list growing towards the bounds check
+ */
+_PUBLIC_ enum ndr_err_code ndr_check_steal_array_size(struct ndr_pull *ndr, const void *p, uint32_t size)
+{
+	uint32_t stored;
+	NDR_CHECK(ndr_steal_array_size(ndr, 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 NDR_ERR_SUCCESS;
+}
+
+/*
+ * check the stored array size field (leaving it on the array_size
+ * token list)
+ */
+_PUBLIC_ enum ndr_err_code ndr_check_array_size(struct ndr_pull *ndr, const void *p, uint32_t size)
+{
+	uint32_t stored;
+	NDR_CHECK(ndr_get_array_size(ndr, 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 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)
+{
+	enum ndr_err_code ret;
+	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));
+	ret = ndr_token_store(ndr, &ndr->array_length_list, p, length);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_pull_error(ndr, ret,
+				      "More than %d NDR tokens stored for array_length_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+/*
+  get the stored array length field
+*/
+_PUBLIC_ enum ndr_err_code ndr_get_array_length(struct ndr_pull *ndr, const void *p, uint32_t *length)
+{
+	return ndr_token_peek(&ndr->array_length_list, p, length);
+}
+
+/*
+ * check the stored array length field and remove from the stored list
+ * (the array_size NDR token list).  We try to remove when possible to
+ * avoid the list growing towards the bounds check
+ */
+_PUBLIC_ enum ndr_err_code ndr_steal_array_length(struct ndr_pull *ndr, const void *p, uint32_t *length)
+{
+	return ndr_token_retrieve(&ndr->array_length_list, p, length);
+}
+/*
+  check the stored array length field, removing it from the list
+*/
+_PUBLIC_ enum ndr_err_code ndr_check_steal_array_length(struct ndr_pull *ndr, const void *p, uint32_t length)
+{
+	uint32_t stored;
+	NDR_CHECK(ndr_steal_array_length(ndr, 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 NDR_ERR_SUCCESS;
+}
+
+_PUBLIC_ enum ndr_err_code ndr_push_pipe_chunk_trailer(struct ndr_push *ndr, int ndr_flags, uint32_t count)
+{
+	if (ndr->flags & LIBNDR_FLAG_NDR64) {
+		int64_t tmp = 0 - (int64_t)count;
+		uint64_t ncount = tmp;
+
+		NDR_CHECK(ndr_push_hyper(ndr, ndr_flags, ncount));
+	}
+
+	return NDR_ERR_SUCCESS;
+}
+
+_PUBLIC_ enum ndr_err_code ndr_check_pipe_chunk_trailer(struct ndr_pull *ndr, int ndr_flags, uint32_t count)
+{
+	if (ndr->flags & LIBNDR_FLAG_NDR64) {
+		int64_t tmp = 0 - (int64_t)count;
+		uint64_t ncount1 = tmp;
+		uint64_t ncount2;
+
+		NDR_CHECK(ndr_pull_hyper(ndr, ndr_flags, &ncount2));
+		if (ncount1 == ncount2) {
+			return NDR_ERR_SUCCESS;
+		}
+
+		return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
+			"Bad pipe trailer[%lld should be %lld] size was %lu\"",
+			(unsigned long long)ncount2,
+			(unsigned long long)ncount1,
+			(unsigned long)count);
+	}
+
+	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)
+{
+	enum ndr_err_code ret =
+		ndr_token_store(ndr, &ndr->switch_list, p, val);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_push_error(ndr, ret,
+				      "More than %d NDR tokens stored for switch_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+_PUBLIC_ enum ndr_err_code ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val)
+{
+
+	enum ndr_err_code ret =
+		ndr_token_store(ndr, &ndr->switch_list, p, val);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_pull_error(ndr, ret,
+				      "More than %d NDR tokens stored for switch_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+_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 (for push) and remove it from the list */
+_PUBLIC_ enum ndr_err_code ndr_push_steal_switch_value(struct ndr_push *ndr,
+						       const void *p,
+						       uint32_t *v)
+{
+	return ndr_token_retrieve(&ndr->switch_list, p, v);
+}
+
+/* retrieve a switch value and remove it from the list */
+_PUBLIC_ uint32_t ndr_print_steal_switch_value(struct ndr_print *ndr, const void *p)
+{
+	enum ndr_err_code status;
+	uint32_t v;
+
+	status = ndr_token_retrieve(&ndr->switch_list, p, &v);
+	if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
+		return 0;
+	}
+
+	return v;
+}
+
+/* retrieve a switch value and remove it from the list */
+_PUBLIC_ enum ndr_err_code ndr_pull_steal_switch_value(struct ndr_pull *ndr,
+						       const void *p,
+						       uint32_t *v)
+{
+	return ndr_token_retrieve(&ndr->switch_list, p, v);
+}
+
+/*
+  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, void *p,
+			      ndr_pull_flags_fn_t fn)
+{
+	struct ndr_pull *ndr;
+	ndr = ndr_pull_init_blob(blob, mem_ctx);
+	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,
+						    void *p, ndr_pull_flags_fn_t fn)
+{
+	struct ndr_pull *ndr;
+	uint32_t highest_ofs;
+	ndr = ndr_pull_init_blob(blob, mem_ctx);
+	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 struct from a blob using NDR - failing if all bytes are not consumed
+
+  This only works for structures with NO allocated memory, like
+  objectSID and GUID.  This helps because we parse these a lot.
+*/
+_PUBLIC_ enum ndr_err_code ndr_pull_struct_blob_all_noalloc(const DATA_BLOB *blob,
+							    void *p, ndr_pull_flags_fn_t fn)
+{
+	/*
+	 * We init this structure on the stack here, to avoid a
+	 * talloc() as otherwise this call to the fn() is assured not
+	 * to be doing any allocation, eg SIDs and GUIDs.
+	 *
+	 * This allows us to keep the safety of the PIDL-generated
+	 * code without the talloc() overhead.
+	 */
+	struct ndr_pull ndr = {
+		.data = blob->data,
+		.data_size = blob->length,
+		.current_mem_ctx = (void *)-1
+	};
+	uint32_t highest_ofs;
+	NDR_CHECK(fn(&ndr, NDR_SCALARS|NDR_BUFFERS, p));
+	highest_ofs = MAX(ndr.offset, 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[%"PRIu32"] "
+			"size[%"PRIu32"]",
+			highest_ofs,
+			ndr.data_size);
+		return ret;
+	}
+	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,
+					       void *p,
+			     uint32_t level, ndr_pull_flags_fn_t fn)
+{
+	struct ndr_pull *ndr;
+	ndr = ndr_pull_init_blob(blob, mem_ctx);
+	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,
+						   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);
+	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, const void *p, ndr_push_flags_fn_t fn)
+{
+	struct ndr_push *ndr;
+	ndr = ndr_push_init_ctx(mem_ctx);
+	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 struct into a provided blob using NDR.
+
+  We error because we want to have the performance issue (extra
+  talloc() calls) show up as an error, not just slower code.  This is
+  used for things like GUIDs, which we expect to be a fixed size, and
+  SIDs that we can pre-calculate the size for.
+*/
+_PUBLIC_ enum ndr_err_code ndr_push_struct_into_fixed_blob(
+	DATA_BLOB *blob, const void *p, ndr_push_flags_fn_t fn)
+{
+	struct ndr_push ndr = {
+		.data = blob->data,
+		.alloc_size = blob->length,
+		.fixed_buf_size = true
+	};
+
+	NDR_CHECK(fn(&ndr, NDR_SCALARS|NDR_BUFFERS, p));
+
+	if (ndr.offset != blob->length) {
+		return ndr_push_error(&ndr, NDR_ERR_BUFSIZE,
+				      "buffer was either to large or small "
+				      "ofs[%u] size[%zu]",
+				      ndr.offset, blob->length);
+	}
+
+	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, void *p,
+			     uint32_t level, ndr_push_flags_fn_t fn)
+{
+	struct ndr_push *ndr;
+	ndr = ndr_push_init_ctx(mem_ctx);
+	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 ndr_push *ndr;
+	enum ndr_err_code status;
+	size_t ret;
+
+	/* avoid recursion */
+	if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
+
+	/* Avoid following a NULL pointer */
+	if (p == NULL) {
+		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, 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 ndr_push *ndr;
+	enum ndr_err_code status;
+	size_t ret;
+
+	/* avoid recursion */
+	if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
+
+	/* Avoid following a NULL pointer */
+	if (p == NULL) {
+		return 0;
+	}
+
+	ndr = ndr_push_init_ctx(NULL);
+	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)
+{
+	enum ndr_err_code ret;
+	ndr->relative_base_offset = offset;
+	ret = ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_push_error(ndr, ret,
+				      "More than %d NDR tokens stored for relative_base_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+/*
+  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)
+{
+	enum ndr_err_code ret;
+	if (p == NULL) {
+		NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
+		return NDR_ERR_SUCCESS;
+	}
+	NDR_CHECK(ndr_push_align(ndr, 4));
+	ret = ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_push_error(ndr, ret,
+				      "More than %d NDR tokens stored for relative_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	NDR_CHECK(ret);
+	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)
+{
+	enum ndr_err_code ret;
+	if (p == NULL) {
+		NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 0));
+		return NDR_ERR_SUCCESS;
+	}
+	NDR_CHECK(ndr_push_align(ndr, 2));
+	ret = ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_push_error(ndr, ret,
+				      "More than %d NDR tokens stored for relative_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	NDR_CHECK(ret);
+	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;
+	uint32_t relative_offset;
+	size_t pad;
+	size_t align = 1;
+
+	if (p == NULL) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (ndr->offset < ndr->relative_base_offset) {
+		return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
+				      "ndr_push_relative_ptr2 ndr->offset(%u) < ndr->relative_base_offset(%u)",
+				      ndr->offset, ndr->relative_base_offset);
+	}
+
+	relative_offset = ndr->offset - ndr->relative_base_offset;
+
+	if (ndr->flags & LIBNDR_FLAG_NOALIGN) {
+		align = 1;
+	} else if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
+		align = 2;
+	} else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
+		align = 4;
+	} else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
+		align = 8;
+	}
+
+	pad = ndr_align_size(relative_offset, align);
+	if (pad != 0) {
+		NDR_CHECK(ndr_push_zero(ndr, pad));
+	}
+
+	relative_offset = ndr->offset - ndr->relative_base_offset;
+	if (relative_offset > UINT16_MAX) {
+		return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
+				      "ndr_push_relative_ptr2 relative_offset(%u) > UINT16_MAX",
+				      relative_offset);
+	}
+
+	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;
+	NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, relative_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)
+{
+	enum ndr_err_code ret;
+	if (p == NULL) {
+		return NDR_ERR_SUCCESS;
+	}
+	if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
+		uint32_t relative_offset;
+		size_t pad;
+		size_t align = 1;
+
+		if (ndr->offset < ndr->relative_base_offset) {
+			return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
+				      "ndr_push_relative_ptr2_start ndr->offset(%u) < ndr->relative_base_offset(%u)",
+				      ndr->offset, ndr->relative_base_offset);
+		}
+
+		relative_offset = ndr->offset - ndr->relative_base_offset;
+
+		if (ndr->flags & LIBNDR_FLAG_NOALIGN) {
+			align = 1;
+		} else if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
+			align = 2;
+		} else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
+			align = 4;
+		} else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
+			align = 8;
+		}
+
+		pad = ndr_align_size(relative_offset, align);
+		if (pad) {
+			NDR_CHECK(ndr_push_zero(ndr, pad));
+		}
+
+		return ndr_push_relative_ptr2(ndr, p);
+	}
+	if (ndr->relative_end_offset == -1) {
+		return ndr_push_error(ndr, NDR_ERR_RELATIVE,
+			      "ndr_push_relative_ptr2_start RELATIVE_REVERSE flag set and relative_end_offset %d",
+			      ndr->relative_end_offset);
+	}
+	ret = ndr_token_store(ndr,
+			      &ndr->relative_begin_list,
+			      p,
+			      ndr->offset);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_push_error(ndr, ret,
+				      "More than %d NDR tokens stored for array_size",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+/*
+  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)
+{
+	uint32_t begin_offset = 0xFFFFFFFF;
+	ssize_t len;
+	uint32_t correct_offset = 0;
+	uint32_t align = 1;
+	uint32_t pad = 0;
+
+	if (p == NULL) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (!(ndr->flags & LIBNDR_FLAG_RELATIVE_REVERSE)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (ndr->flags & LIBNDR_FLAG_NO_NDR_SIZE) {
+		/* better say more than calculation a too small buffer */
+		NDR_PUSH_ALIGN(ndr, 8);
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (ndr->relative_end_offset < ndr->offset) {
+		return ndr_push_error(ndr, NDR_ERR_RELATIVE,
+				      "ndr_push_relative_ptr2_end:"
+				      "relative_end_offset %u < offset %u",
+				      ndr->relative_end_offset, ndr->offset);
+	}
+
+	NDR_CHECK(ndr_token_retrieve(&ndr->relative_begin_list, p, &begin_offset));
+
+	/* we have marshalled a buffer, see how long it was */
+	len = ndr->offset - begin_offset;
+
+	if (len < 0) {
+		return ndr_push_error(ndr, NDR_ERR_RELATIVE,
+				      "ndr_push_relative_ptr2_end:"
+				      "offset %u - begin_offset %u < 0",
+				      ndr->offset, begin_offset);
+	}
+
+	if (ndr->relative_end_offset < len) {
+		return ndr_push_error(ndr, NDR_ERR_RELATIVE,
+				      "ndr_push_relative_ptr2_end:"
+				      "relative_end_offset %u < len %lld",
+				      ndr->offset, (long long)len);
+	}
+
+	/* the reversed offset is at the end of the main buffer */
+	correct_offset = ndr->relative_end_offset - len;
+
+	if (ndr->flags & LIBNDR_FLAG_NOALIGN) {
+		align = 1;
+	} else if (ndr->flags & LIBNDR_FLAG_ALIGN2) {
+		align = 2;
+	} else if (ndr->flags & LIBNDR_FLAG_ALIGN4) {
+		align = 4;
+	} else if (ndr->flags & LIBNDR_FLAG_ALIGN8) {
+		align = 8;
+	}
+
+	pad = ndr_align_size(correct_offset, align);
+	if (pad) {
+		correct_offset += pad;
+		correct_offset -= align;
+	}
+
+	if (correct_offset < begin_offset) {
+		return ndr_push_error(ndr, NDR_ERR_RELATIVE,
+				      "ndr_push_relative_ptr2_end: "
+				      "correct_offset %u < begin_offset %u",
+				      correct_offset, begin_offset);
+	}
+
+	if (len > 0) {
+		uint32_t clear_size = correct_offset - begin_offset;
+
+		clear_size = MIN(clear_size, len);
+
+		/* now move the marshalled buffer to the end of the main buffer */
+		memmove(ndr->data + correct_offset, ndr->data + begin_offset, len);
+
+		if (clear_size) {
+			/* and wipe out old buffer within the main buffer */
+			memset(ndr->data + begin_offset, '\0', clear_size);
+		}
+	}
+
+	/* and set the end offset for the next buffer */
+	ndr->relative_end_offset = correct_offset;
+
+	/* finally write the offset to the main buffer */
+	ndr->offset = correct_offset;
+	NDR_CHECK(ndr_push_relative_ptr2(ndr, p));
+
+	/* restore to where we were in the main buffer */
+	ndr->offset = begin_offset;
+
+	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)
+{
+	enum ndr_err_code ret;
+	ndr->relative_base_offset = offset;
+	ret = ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_pull_error(ndr, ret,
+				      "More than %d NDR tokens stored for relative_base_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+/*
+  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)
+{
+	enum ndr_err_code ret;
+	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);
+	}
+	ret = ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
+	if (ret == NDR_ERR_RANGE) {
+		return ndr_pull_error(ndr, ret,
+				      "More than %d NDR tokens stored for relative_list",
+				      NDR_TOKEN_MAX_LIST_SIZE);
+	}
+	return ret;
+}
+
+/*
+  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);
+}
+
+static const 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" },
+	{ NDR_ERR_INCOMPLETE_BUFFER, "Incomplete Buffer" },
+	{ NDR_ERR_MAX_RECURSION_EXCEEDED, "Maximum Recursion Exceeded" },
+	{ NDR_ERR_UNDERFLOW, "Underflow" },
+	{ 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";
+}