Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 724 insertions, 0 deletions

diff --git a/source3/libnet/libnet_dssync.c b/source3/libnet/libnet_dssync.c
new file mode 100644
index 0000000..7d5d836
--- /dev/null
+++ b/source3/libnet/libnet_dssync.c
@@ -0,0 +1,724 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Copyright (C) Stefan (metze) Metzmacher 2005
+   Copyright (C) Guenther Deschner 2008
+   Copyright (C) Michael Adam 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/>.
+*/
+
+
+#include "includes.h"
+#include "libnet/libnet_dssync.h"
+#include "rpc_client/cli_pipe.h"
+#include "../libcli/drsuapi/drsuapi.h"
+#include "../librpc/gen_ndr/ndr_drsuapi_c.h"
+
+/****************************************************************
+****************************************************************/
+
+static int libnet_dssync_free_context(struct dssync_context *ctx)
+{
+	WERROR result;
+	struct dcerpc_binding_handle *b;
+
+	if (!ctx) {
+		return 0;
+	}
+
+	if (is_valid_policy_hnd(&ctx->bind_handle) && ctx->cli) {
+		b = ctx->cli->binding_handle;
+		dcerpc_drsuapi_DsUnbind(b, ctx, &ctx->bind_handle, &result);
+	}
+
+	return 0;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS libnet_dssync_init_context(TALLOC_CTX *mem_ctx,
+				    struct dssync_context **ctx_p)
+{
+	struct dssync_context *ctx;
+
+	ctx = talloc_zero(mem_ctx, struct dssync_context);
+	NT_STATUS_HAVE_NO_MEMORY(ctx);
+
+	talloc_set_destructor(ctx, libnet_dssync_free_context);
+	ctx->clean_old_entries = false;
+
+	*ctx_p = ctx;
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static void parse_obj_identifier(struct drsuapi_DsReplicaObjectIdentifier *id,
+				 uint32_t *rid)
+{
+	if (!id || !rid) {
+		return;
+	}
+
+	*rid = 0;
+
+	if (id->sid.num_auths > 0) {
+		*rid = id->sid.sub_auths[id->sid.num_auths - 1];
+	}
+}
+
+/****************************************************************
+****************************************************************/
+
+static void libnet_dssync_decrypt_attributes(TALLOC_CTX *mem_ctx,
+					     DATA_BLOB *session_key,
+					     struct drsuapi_DsReplicaObjectListItemEx *cur)
+{
+	for (; cur; cur = cur->next_object) {
+
+		uint32_t i;
+		uint32_t rid = 0;
+
+		parse_obj_identifier(cur->object.identifier, &rid);
+
+		for (i=0; i < cur->object.attribute_ctr.num_attributes; i++) {
+
+			struct drsuapi_DsReplicaAttribute *attr;
+
+			attr = &cur->object.attribute_ctr.attributes[i];
+
+			if (attr->value_ctr.num_values < 1) {
+				continue;
+			}
+
+			if (!attr->value_ctr.values[0].blob) {
+				continue;
+			}
+
+			drsuapi_decrypt_attribute(mem_ctx,
+						  session_key,
+						  rid,
+						  0,
+						  attr);
+		}
+	}
+}
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS libnet_dssync_bind(TALLOC_CTX *mem_ctx,
+				   struct dssync_context *ctx)
+{
+	NTSTATUS status;
+	WERROR werr;
+
+	struct GUID bind_guid;
+	struct drsuapi_DsBindInfoCtr bind_info;
+	struct drsuapi_DsBindInfo28 info28;
+	struct dcerpc_binding_handle *b = ctx->cli->binding_handle;
+
+	ZERO_STRUCT(info28);
+
+	GUID_from_string(DRSUAPI_DS_BIND_GUID, &bind_guid);
+
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_BASE;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_ASYNC_REPLICATION;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_REMOVEAPI;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_MOVEREQ_V2;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GETCHG_COMPRESS;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V1;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_RESTORE_USN_OPTIMIZATION;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_KCC_EXECUTE;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRY_V2;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_LINKED_VALUE_REPLICATION;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V2;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_INSTANCE_TYPE_NOT_REQ_ON_MOD;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_CRYPTO_BIND;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GET_REPL_INFO;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_STRONG_ENCRYPTION;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V01;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_TRANSITIVE_MEMBERSHIP;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_ADD_SID_HISTORY;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_POST_BETA3;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GET_MEMBERSHIPS2;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V6;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_NONDOMAIN_NCS;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V8;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V5;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V6;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRYREPLY_V3;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V7;
+	info28.supported_extensions	|= DRSUAPI_SUPPORTED_EXTENSION_VERIFY_OBJECT;
+	info28.site_guid		= GUID_zero();
+	info28.pid			= 508;
+	info28.repl_epoch		= 0;
+
+	bind_info.length = 28;
+	bind_info.info.info28 = info28;
+
+	status = dcerpc_drsuapi_DsBind(b, mem_ctx,
+				       &bind_guid,
+				       &bind_info,
+				       &ctx->bind_handle,
+				       &werr);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	if (!W_ERROR_IS_OK(werr)) {
+		return werror_to_ntstatus(werr);
+	}
+
+	ZERO_STRUCT(ctx->remote_info28);
+	switch (bind_info.length) {
+	case 24: {
+		struct drsuapi_DsBindInfo24 *info24;
+		info24 = &bind_info.info.info24;
+		ctx->remote_info28.site_guid		= info24->site_guid;
+		ctx->remote_info28.supported_extensions	= info24->supported_extensions;
+		ctx->remote_info28.pid			= info24->pid;
+		ctx->remote_info28.repl_epoch		= 0;
+		break;
+	}
+	case 28: {
+		ctx->remote_info28 = bind_info.info.info28;
+		break;
+	}
+	case 32: {
+		struct drsuapi_DsBindInfo32 *info32;
+		info32 = &bind_info.info.info32;
+		ctx->remote_info28.site_guid		= info32->site_guid;
+		ctx->remote_info28.supported_extensions	= info32->supported_extensions;
+		ctx->remote_info28.pid			= info32->pid;
+		ctx->remote_info28.repl_epoch		= info32->repl_epoch;
+		break;
+	}
+	case 48: {
+		struct drsuapi_DsBindInfo48 *info48;
+		info48 = &bind_info.info.info48;
+		ctx->remote_info28.site_guid		= info48->site_guid;
+		ctx->remote_info28.supported_extensions	= info48->supported_extensions;
+		ctx->remote_info28.pid			= info48->pid;
+		ctx->remote_info28.repl_epoch		= info48->repl_epoch;
+		break;
+	}
+	case 52: {
+		struct drsuapi_DsBindInfo52 *info52;
+		info52 = &bind_info.info.info52;
+		ctx->remote_info28.site_guid		= info52->site_guid;
+		ctx->remote_info28.supported_extensions	= info52->supported_extensions;
+		ctx->remote_info28.pid			= info52->pid;
+		ctx->remote_info28.repl_epoch		= info52->repl_epoch;
+		break;
+	}
+	default:
+		DEBUG(1, ("Warning: invalid info length in bind info: %d\n",
+			  bind_info.length));
+		break;
+	}
+
+	return status;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS libnet_dssync_lookup_nc(TALLOC_CTX *mem_ctx,
+					struct dssync_context *ctx)
+{
+	NTSTATUS status;
+	WERROR werr;
+	uint32_t level = 1;
+	union drsuapi_DsNameRequest req;
+	uint32_t level_out;
+	struct drsuapi_DsNameString names[1];
+	union drsuapi_DsNameCtr ctr;
+	struct dcerpc_binding_handle *b = ctx->cli->binding_handle;
+
+	names[0].str = talloc_asprintf(mem_ctx, "%s\\", ctx->domain_name);
+	NT_STATUS_HAVE_NO_MEMORY(names[0].str);
+
+	req.req1.codepage	= 1252; /* german */
+	req.req1.language	= 0x00000407; /* german */
+	req.req1.count		= 1;
+	req.req1.names		= names;
+	req.req1.format_flags	= DRSUAPI_DS_NAME_FLAG_NO_FLAGS;
+	req.req1.format_offered	= DRSUAPI_DS_NAME_FORMAT_UNKNOWN;
+	req.req1.format_desired	= DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
+
+	status = dcerpc_drsuapi_DsCrackNames(b, mem_ctx,
+					     &ctx->bind_handle,
+					     level,
+					     &req,
+					     &level_out,
+					     &ctr,
+					     &werr);
+	if (!NT_STATUS_IS_OK(status)) {
+		ctx->error_message = talloc_asprintf(ctx,
+			"Failed to lookup DN for domain name: %s",
+			get_friendly_nt_error_msg(status));
+		return status;
+	}
+
+	if (!W_ERROR_IS_OK(werr)) {
+		ctx->error_message = talloc_asprintf(ctx,
+			"Failed to lookup DN for domain name: %s",
+			get_friendly_werror_msg(werr));
+		return werror_to_ntstatus(werr);
+	}
+
+	if (ctr.ctr1->count != 1) {
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	if (ctr.ctr1->array[0].status != DRSUAPI_DS_NAME_STATUS_OK) {
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	ctx->nc_dn = talloc_strdup(mem_ctx, ctr.ctr1->array[0].result_name);
+	NT_STATUS_HAVE_NO_MEMORY(ctx->nc_dn);
+
+	if (!ctx->dns_domain_name) {
+		ctx->dns_domain_name = talloc_strdup_upper(mem_ctx,
+			ctr.ctr1->array[0].dns_domain_name);
+		NT_STATUS_HAVE_NO_MEMORY(ctx->dns_domain_name);
+	}
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS libnet_dssync_init(TALLOC_CTX *mem_ctx,
+				   struct dssync_context *ctx)
+{
+	NTSTATUS status;
+
+	status = libnet_dssync_bind(mem_ctx, ctx);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	if (!ctx->nc_dn) {
+		status = libnet_dssync_lookup_nc(mem_ctx, ctx);
+	}
+
+	return status;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS libnet_dssync_build_request(TALLOC_CTX *mem_ctx,
+					    struct dssync_context *ctx,
+					    const char *dn,
+					    struct replUpToDateVectorBlob *utdv,
+					    uint32_t *plevel,
+					    union drsuapi_DsGetNCChangesRequest *preq)
+{
+	NTSTATUS status;
+	uint32_t count;
+	uint32_t level;
+	union drsuapi_DsGetNCChangesRequest req;
+	enum drsuapi_DsExtendedOperation extended_op;
+	struct drsuapi_DsReplicaObjectIdentifier *nc = NULL;
+	struct drsuapi_DsReplicaCursorCtrEx *cursors = NULL;
+
+	uint32_t replica_flags	= DRSUAPI_DRS_WRIT_REP |
+				  DRSUAPI_DRS_INIT_SYNC |
+				  DRSUAPI_DRS_PER_SYNC |
+				  DRSUAPI_DRS_GET_ANC |
+				  DRSUAPI_DRS_NEVER_SYNCED;
+
+	ZERO_STRUCT(req);
+
+	if (ctx->remote_info28.supported_extensions
+	    & DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V8)
+	{
+		level = 8;
+	} else {
+		level = 5;
+	}
+
+	nc = talloc_zero(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
+	if (!nc) {
+		status = NT_STATUS_NO_MEMORY;
+		goto fail;
+	}
+	nc->dn = dn;
+	nc->guid = GUID_zero();
+	nc->sid = (struct dom_sid) {0};
+
+	if (!ctx->single_object_replication &&
+	    !ctx->force_full_replication && utdv)
+	{
+		cursors = talloc_zero(mem_ctx,
+					 struct drsuapi_DsReplicaCursorCtrEx);
+		if (!cursors) {
+			status = NT_STATUS_NO_MEMORY;
+			goto fail;
+		}
+
+		switch (utdv->version) {
+		case 1:
+			cursors->count = utdv->ctr.ctr1.count;
+			cursors->cursors = utdv->ctr.ctr1.cursors;
+			break;
+		case 2:
+			cursors->count = utdv->ctr.ctr2.count;
+			cursors->cursors = talloc_array(cursors,
+						struct drsuapi_DsReplicaCursor,
+						cursors->count);
+			if (!cursors->cursors) {
+				status = NT_STATUS_NO_MEMORY;
+				goto fail;
+			}
+			for (count = 0; count < cursors->count; count++) {
+				cursors->cursors[count].source_dsa_invocation_id =
+					utdv->ctr.ctr2.cursors[count].source_dsa_invocation_id;
+				cursors->cursors[count].highest_usn =
+					utdv->ctr.ctr2.cursors[count].highest_usn;
+			}
+			break;
+		}
+	}
+
+	if (ctx->single_object_replication) {
+		extended_op = DRSUAPI_EXOP_REPL_OBJ;
+	} else {
+		extended_op = DRSUAPI_EXOP_NONE;
+	}
+
+	if (level == 8) {
+		req.req8.naming_context		= nc;
+		req.req8.replica_flags		= replica_flags;
+		req.req8.max_object_count	= 402;
+		req.req8.max_ndr_size		= 402116;
+		req.req8.uptodateness_vector	= cursors;
+		req.req8.extended_op		= extended_op;
+	} else if (level == 5) {
+		req.req5.naming_context		= nc;
+		req.req5.replica_flags		= replica_flags;
+		req.req5.max_object_count	= 402;
+		req.req5.max_ndr_size		= 402116;
+		req.req5.uptodateness_vector	= cursors;
+		req.req5.extended_op		= extended_op;
+	} else {
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto fail;
+	}
+
+	if (plevel) {
+		*plevel = level;
+	}
+
+	if (preq) {
+		*preq = req;
+	}
+
+	return NT_STATUS_OK;
+
+fail:
+	TALLOC_FREE(nc);
+	TALLOC_FREE(cursors);
+	return status;
+}
+
+static NTSTATUS libnet_dssync_getncchanges(TALLOC_CTX *mem_ctx,
+					   struct dssync_context *ctx,
+					   uint32_t level,
+					   union drsuapi_DsGetNCChangesRequest *req,
+					   struct replUpToDateVectorBlob **pnew_utdv)
+{
+	NTSTATUS status;
+	WERROR werr;
+	union drsuapi_DsGetNCChangesCtr ctr;
+	struct drsuapi_DsGetNCChangesCtr1 *ctr1 = NULL;
+	struct drsuapi_DsGetNCChangesCtr6 *ctr6 = NULL;
+	struct replUpToDateVectorBlob *new_utdv = NULL;
+	uint32_t level_out = 0;
+	uint32_t out_level = 0;
+	int y;
+	bool last_query;
+	struct dcerpc_binding_handle *b = ctx->cli->binding_handle;
+
+	if (!ctx->single_object_replication) {
+		new_utdv = talloc_zero(mem_ctx, struct replUpToDateVectorBlob);
+		if (!new_utdv) {
+			status = NT_STATUS_NO_MEMORY;
+			goto out;
+		}
+	}
+
+	for (y=0, last_query = false; !last_query; y++) {
+		struct drsuapi_DsReplicaObjectListItemEx *first_object = NULL;
+		struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr = NULL;
+		uint32_t linked_attributes_count = 0;
+		struct drsuapi_DsReplicaLinkedAttribute *linked_attributes = NULL;
+
+		if (level == 8) {
+			DEBUG(1,("start[%d] tmp_higest_usn: %llu , highest_usn: %llu\n",y,
+				(long long)req->req8.highwatermark.tmp_highest_usn,
+				(long long)req->req8.highwatermark.highest_usn));
+		} else if (level == 5) {
+			DEBUG(1,("start[%d] tmp_higest_usn: %llu , highest_usn: %llu\n",y,
+				(long long)req->req5.highwatermark.tmp_highest_usn,
+				(long long)req->req5.highwatermark.highest_usn));
+		}
+
+		status = dcerpc_drsuapi_DsGetNCChanges(b, mem_ctx,
+						       &ctx->bind_handle,
+						       level,
+						       req,
+						       &level_out,
+						       &ctr,
+						       &werr);
+		if (!NT_STATUS_IS_OK(status)) {
+			ctx->error_message = talloc_asprintf(ctx,
+				"Failed to get NC Changes: %s",
+				get_friendly_nt_error_msg(status));
+			goto out;
+		}
+
+		if (!W_ERROR_IS_OK(werr)) {
+			status = werror_to_ntstatus(werr);
+			ctx->error_message = talloc_asprintf(ctx,
+				"Failed to get NC Changes: %s",
+				get_friendly_werror_msg(werr));
+			goto out;
+		}
+
+		if (level_out == 1) {
+			out_level = 1;
+			ctr1 = &ctr.ctr1;
+		} else if (level_out == 2 && ctr.ctr2.mszip1.ts) {
+			out_level = 1;
+			ctr1 = &ctr.ctr2.mszip1.ts->ctr1;
+		} else if (level_out == 6) {
+			out_level = 6;
+			ctr6 = &ctr.ctr6;
+		} else if (level_out == 7
+			   && ctr.ctr7.level == 6
+			   && ctr.ctr7.type == DRSUAPI_COMPRESSION_TYPE_MSZIP
+			   && ctr.ctr7.ctr.mszip6.ts) {
+			out_level = 6;
+			ctr6 = &ctr.ctr7.ctr.mszip6.ts->ctr6;
+		} else if (level_out == 7
+			   && ctr.ctr7.level == 6
+			   && ctr.ctr7.type == DRSUAPI_COMPRESSION_TYPE_WIN2K3_LZ77_DIRECT2
+			   && ctr.ctr7.ctr.xpress6.ts) {
+			out_level = 6;
+			ctr6 = &ctr.ctr7.ctr.xpress6.ts->ctr6;
+		}
+
+		if (out_level == 1) {
+			DEBUG(1,("end[%d] tmp_highest_usn: %llu , highest_usn: %llu\n",y,
+				(long long)ctr1->new_highwatermark.tmp_highest_usn,
+				(long long)ctr1->new_highwatermark.highest_usn));
+
+			first_object = ctr1->first_object;
+			mapping_ctr = &ctr1->mapping_ctr;
+
+			if (ctr1->more_data) {
+				req->req5.highwatermark = ctr1->new_highwatermark;
+			} else {
+				last_query = true;
+				if (ctr1->uptodateness_vector &&
+				    !ctx->single_object_replication)
+				{
+					new_utdv->version = 1;
+					new_utdv->ctr.ctr1.count =
+						ctr1->uptodateness_vector->count;
+					new_utdv->ctr.ctr1.cursors =
+						ctr1->uptodateness_vector->cursors;
+				}
+			}
+		} else if (out_level == 6) {
+			DEBUG(1,("end[%d] tmp_highest_usn: %llu , highest_usn: %llu\n",y,
+				(long long)ctr6->new_highwatermark.tmp_highest_usn,
+				(long long)ctr6->new_highwatermark.highest_usn));
+
+			first_object = ctr6->first_object;
+			mapping_ctr = &ctr6->mapping_ctr;
+
+			linked_attributes = ctr6->linked_attributes;
+			linked_attributes_count = ctr6->linked_attributes_count;
+
+			if (ctr6->more_data) {
+				req->req8.highwatermark = ctr6->new_highwatermark;
+			} else {
+				last_query = true;
+				if (ctr6->uptodateness_vector &&
+				    !ctx->single_object_replication)
+				{
+					new_utdv->version = 2;
+					new_utdv->ctr.ctr2.count =
+						ctr6->uptodateness_vector->count;
+					new_utdv->ctr.ctr2.cursors =
+						ctr6->uptodateness_vector->cursors;
+				}
+			}
+		}
+
+		status = cli_get_session_key(mem_ctx, ctx->cli, &ctx->session_key);
+		if (!NT_STATUS_IS_OK(status)) {
+			ctx->error_message = talloc_asprintf(ctx,
+				"Failed to get Session Key: %s",
+				nt_errstr(status));
+			goto out;
+		}
+
+		libnet_dssync_decrypt_attributes(mem_ctx,
+						 &ctx->session_key,
+						 first_object);
+
+		if (ctx->ops->process_objects) {
+			status = ctx->ops->process_objects(ctx, mem_ctx,
+							   first_object,
+							   mapping_ctr);
+			if (!NT_STATUS_IS_OK(status)) {
+				ctx->error_message = talloc_asprintf(ctx,
+					"Failed to call processing function: %s",
+					nt_errstr(status));
+				goto out;
+			}
+		}
+
+		if (linked_attributes_count == 0) {
+			continue;
+		}
+
+		if (ctx->ops->process_links) {
+			status = ctx->ops->process_links(ctx, mem_ctx,
+							 linked_attributes_count,
+							 linked_attributes,
+							 mapping_ctr);
+			if (!NT_STATUS_IS_OK(status)) {
+				ctx->error_message = talloc_asprintf(ctx,
+					"Failed to call processing function: %s",
+					nt_errstr(status));
+				goto out;
+			}
+		}
+	}
+
+	*pnew_utdv = new_utdv;
+
+out:
+	return status;
+}
+
+static NTSTATUS libnet_dssync_process(TALLOC_CTX *mem_ctx,
+				      struct dssync_context *ctx)
+{
+	NTSTATUS status;
+
+	uint32_t level = 0;
+	union drsuapi_DsGetNCChangesRequest req;
+	struct replUpToDateVectorBlob *old_utdv = NULL;
+	struct replUpToDateVectorBlob *pnew_utdv = NULL;
+	const char **dns;
+	uint32_t dn_count;
+	uint32_t count;
+
+	if (ctx->ops->startup) {
+		status = ctx->ops->startup(ctx, mem_ctx, &old_utdv);
+		if (!NT_STATUS_IS_OK(status)) {
+			ctx->error_message = talloc_asprintf(ctx,
+				"Failed to call startup operation: %s",
+				nt_errstr(status));
+			goto out;
+		}
+	}
+
+	if (ctx->single_object_replication && ctx->object_dns) {
+		dns = ctx->object_dns;
+		dn_count = ctx->object_count;
+	} else {
+		dns = &ctx->nc_dn;
+		dn_count = 1;
+	}
+
+	status = NT_STATUS_OK;
+
+	for (count=0; count < dn_count; count++) {
+		status = libnet_dssync_build_request(mem_ctx, ctx,
+						     dns[count],
+						     old_utdv, &level,
+						     &req);
+		if (!NT_STATUS_IS_OK(status)) {
+			goto out;
+		}
+
+		status = libnet_dssync_getncchanges(mem_ctx, ctx, level, &req,
+						    &pnew_utdv);
+		if (!NT_STATUS_IS_OK(status)) {
+			if (!ctx->error_message) {
+				ctx->error_message = talloc_asprintf(ctx,
+					"Failed to call DsGetNCCHanges: %s",
+					nt_errstr(status));
+			}
+			goto out;
+		}
+	}
+
+	if (ctx->ops->finish) {
+		status = ctx->ops->finish(ctx, mem_ctx, pnew_utdv);
+		if (!NT_STATUS_IS_OK(status)) {
+			ctx->error_message = talloc_asprintf(ctx,
+				"Failed to call finishing operation: %s",
+				nt_errstr(status));
+			goto out;
+		}
+	}
+
+ out:
+	return status;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS libnet_dssync(TALLOC_CTX *mem_ctx,
+		       struct dssync_context *ctx)
+{
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx;
+
+	tmp_ctx = talloc_new(mem_ctx);
+	if (!tmp_ctx) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = libnet_dssync_init(tmp_ctx, ctx);
+	if (!NT_STATUS_IS_OK(status)) {
+		goto out;
+	}
+
+	status = libnet_dssync_process(tmp_ctx, ctx);
+	if (!NT_STATUS_IS_OK(status)) {
+		goto out;
+	}
+
+ out:
+	TALLOC_FREE(tmp_ctx);
+	return status;
+}
+