389-ds-base/ldap/servers/plugins/replication/windows_protocol_util.c

/** BEGIN COPYRIGHT BLOCK
 * 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; version 2 of the License.
 * 
 * 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., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA.
 * 
 * In addition, as a special exception, Red Hat, Inc. gives You the additional
 * right to link the code of this Program with code not covered under the GNU
 * General Public License ("Non-GPL Code") and to distribute linked combinations
 * including the two, subject to the limitations in this paragraph. Non-GPL Code
 * permitted under this exception must only link to the code of this Program
 * through those well defined interfaces identified in the file named EXCEPTION
 * found in the source code files (the "Approved Interfaces"). The files of
 * Non-GPL Code may instantiate templates or use macros or inline functions from
 * the Approved Interfaces without causing the resulting work to be covered by
 * the GNU General Public License. Only Red Hat, Inc. may make changes or
 * additions to the list of Approved Interfaces. You must obey the GNU General
 * Public License in all respects for all of the Program code and other code used
 * in conjunction with the Program except the Non-GPL Code covered by this
 * exception. If you modify this file, you may extend this exception to your
 * version of the file, but you are not obligated to do so. If you do not wish to
 * provide this exception without modification, you must delete this exception
 * statement from your version and license this file solely under the GPL without
 * exception. 
 * 
 * 
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif


/* repl5_protocol_util.c */
/*

Code common to both incremental and total protocols.

*/

#include "repl5.h"
#include "repl5_prot_private.h"
#include "windowsrepl.h"
#include "slap.h"

#include <unicode/ustring.h> /* UTF8 conversion */


int ruv_private_new( RUV **ruv, RUV *clone );

#ifdef FOR_DEBUGGING
static Slapi_Entry* windows_entry_already_exists(Slapi_Entry *e);
static void extract_guid_from_entry_bv(Slapi_Entry *e, const struct berval **bv);
#endif
static void windows_map_mods_for_replay(Private_Repl_Protocol *prp,LDAPMod **original_mods, LDAPMod ***returned_mods, int is_user, char** password);
static int is_subject_of_agreement_local(const Slapi_Entry *local_entry,const Repl_Agmt *ra);
static int windows_create_remote_entry(Private_Repl_Protocol *prp,Slapi_Entry *original_entry, Slapi_DN *remote_sdn, Slapi_Entry **remote_entry, char** password);
static int windows_get_local_entry(const Slapi_DN* local_dn,Slapi_Entry **local_entry);
static int windows_get_local_entry_by_uniqueid(Private_Repl_Protocol *prp,const char* uniqueid,Slapi_Entry **local_entry);
static int windows_get_local_tombstone_by_uniqueid(Private_Repl_Protocol *prp,const char* uniqueid,Slapi_Entry **local_entry);
static int windows_search_local_entry_by_uniqueid(Private_Repl_Protocol *prp, const char *uniqueid, char ** attrs, Slapi_Entry **ret_entry, int tombstone, void * component_identity);
static int map_entry_dn_outbound(Slapi_Entry *e, Slapi_DN **dn, Private_Repl_Protocol *prp, int *missing_entry, int want_guid);
static char* extract_ntuserdomainid_from_entry(Slapi_Entry *e);
static char* extract_container(const Slapi_DN *entry_dn, const Slapi_DN *suffix_dn);
static int windows_get_remote_entry (Private_Repl_Protocol *prp, const Slapi_DN* remote_dn,Slapi_Entry **remote_entry);
static int windows_get_remote_tombstone(Private_Repl_Protocol *prp, const Slapi_DN* remote_dn,Slapi_Entry **remote_entry);
static int windows_reanimate_tombstone(Private_Repl_Protocol *prp, const Slapi_DN* tombstone_dn, const char* new_dn);
static const char* op2string (int op);
static int is_subject_of_agreement_remote(Slapi_Entry *e, const Repl_Agmt *ra);
static int map_entry_dn_inbound(Slapi_Entry *e, Slapi_DN **dn, const Repl_Agmt *ra);
static int windows_update_remote_entry(Private_Repl_Protocol *prp,Slapi_Entry *remote_entry,Slapi_Entry *local_entry);
static int is_guid_dn(Slapi_DN *remote_dn);
static int map_windows_tombstone_dn(Slapi_Entry *e, Slapi_DN **dn, Private_Repl_Protocol *prp, int *exists);


/* Controls the direction of flow for mapped attributes */
typedef enum mapping_types {
	bidirectional,
	fromwindowsonly,
	towindowsonly,
	disabled
} mapping_types;

/* Controls if we sync the attibute always, or only when we're creating new entries */
/* Used for attributes like samaccountname, where we want to fill it in on a new entry, but
 * we never want to change it on an existing entry */
typedef enum creation_types {
	always,
	createonly
} creation_types;

typedef enum attr_types {
	normal,
	dnmap
} attr_types;

typedef struct _windows_attribute_map
{
	char *windows_attribute_name;
	char *ldap_attribute_name;
	mapping_types map_type;
	creation_types create_type;
	attr_types attr_type;
} windows_attribute_map;

/* List of attributes that are common to AD and LDAP, so we simply copy them over in both directions */
static char* windows_user_matching_attributes[] = 
{
	"description",
	"destinationIndicator",
	"facsimileTelephoneNumber",
	"givenName",
	"homePhone",
	"homePostalAddress",
	"initials",
	"l",
	"mail",
	"mobile",
	"o",
	"ou",
	"pager",
	"physicalDeliveryOfficeName",
	"postOfficeBox",
	"postalAddress",
	"postalCode",
	"registeredAddress",
	"sn",
	"st",
	"telephoneNumber",
	"teletexTerminalIdentifier",
	"telexNumber",
	"title",
	"userCertificate",
	"x121Address",
	NULL
};

static char* windows_group_matching_attributes[] = 
{
	"description",
	"destinationIndicator",
	"facsimileTelephoneNumber",
	"givenName",
	"homePhone",
	"homePostalAddress",
	"initials",
	"l",
	"mail",
	"manager",
	"mobile",
	"o",
	"ou",
	"pager",
	"physicalDeliveryOfficeName",
	"postOfficeBox",
	"postalAddress",
	"postalCode",
	"preferredDeliveryMethod",
	"registeredAddress",
	"sn",
	"st",
	"telephoneNumber",
	"teletexTerminalIdentifier",
	"telexNumber",
	"title",
	"userCertificate",
	"x121Address",
	NULL
};

/* List of attributes that are common to AD and LDAP, so we simply copy them over in both directions */
static char* nt4_user_matching_attributes[] = 
{
	"description",
	NULL
};

static char* nt4_group_matching_attributes[] = 
{
	"description",
	NULL
};

static windows_attribute_map user_attribute_map[] = 
{
	{ "homeDirectory", "ntUserHomeDir", bidirectional, always, normal},
	{ "scriptPath", "ntUserScriptPath", bidirectional, always, normal},
	{ "lastLogon", "ntUserLastLogon", fromwindowsonly, always, normal},
	{ "lastLogoff", "ntUserLastLogoff", fromwindowsonly, always, normal},
	{ "accountExpires", "ntUserAcctExpires", bidirectional, always, normal},
	{ "codePage", "ntUserCodePage", bidirectional, always, normal},
	{ "logonHours", "ntUserLogonHours", bidirectional, always, normal},
	{ "maxStorage", "ntUserMaxStorage", bidirectional, always, normal},
	{ "profilePath", "ntUserProfile", bidirectional, always, normal},
	/* IETF schema has 'street' and 'streetaddress' as aliases, but Microsoft does not */
	{ "streetAddress", "street", towindowsonly, always, normal},
	{ FAKE_STREET_ATTR_NAME, "street", fromwindowsonly, always, normal},
	{ "userParameters", "ntUserParms", bidirectional, always, normal},
	{ "userWorkstations", "ntUserWorkstations", bidirectional, always, normal},
    { "sAMAccountName", "ntUserDomainId", bidirectional, always, normal},
	/* cn is a naming attribute in AD, so we don't want to change it after entry creation */
    { "cn", "cn", towindowsonly, createonly, normal},
	/* However, it isn't a naming attribute in DS (we use uid) so it's safe to accept changes inbound */
    { "name", "cn", fromwindowsonly, always, normal},
    { "manager", "manager", bidirectional, always, dnmap},
    { "seealso", "seealso", bidirectional, always, dnmap},
	{NULL, NULL, -1}
};

static windows_attribute_map group_attribute_map[] = 
{
	{ "groupType", "ntGroupType",  bidirectional, createonly, normal},
	{ "sAMAccountName", "ntUserDomainId", bidirectional, always, normal},
	/* IETF schema has 'street' and 'streetaddress' as aliases, but Microsoft does not */
	{ "streetAddress", "street", towindowsonly, always, normal},
	{ FAKE_STREET_ATTR_NAME, "street", fromwindowsonly, always, normal},
    { "member", "uniquemember", bidirectional, always, dnmap},
	{NULL, NULL, -1}
};

/* 
 * Notes on differences for NT4:
 * 1. NT4 returns the SID value in the objectGUID attribute value.
 *    The SID has variable length and does not match the length of a GUID.
 * 2. NT4 currently never generates tombstones. If it did, we'd need to parse the 
 *    different form of the GUID in the tombstone DNs.
 * 3. NT4 Does not implement the dirsync control. We always get all users and groups.
 * 4. NT4 generates and expects DNs with samaccountname as the RDN, not cn.
 * 5. NT4 handles the DN=<GUID> (remember that the '<' '>' characters are included!) DN form 
 *    for modifies and deletes, provided we use the value it gave us in the objectGUID attribute (which is actually the SID).
 * 6. NT4 has less and different schema from AD. For example users in NT4 have no firstname/lastname, only an optional 'description'.
 */

/* 
 * When we get an error from an LDAP operation, we call this
 * function to decide if we should just keep replaying
 * updates, or if we should stop, back off, and try again
 * later.
 * Returns PR_TRUE if we shoould keep going, PR_FALSE if
 * we should back off and try again later.
 *
 * In general, we keep going if the return code is consistent
 * with some sort of bug in URP that causes the consumer to
 * emit an error code that it shouldn't have, e.g. LDAP_ALREADY_EXISTS.
 * 
 * We stop if there's some indication that the server just completely
 * failed to process the operation, e.g. LDAP_OPERATIONS_ERROR.
 */
PRBool
windows_ignore_error_and_keep_going(int error)
{
	int return_value;

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_ignore_error_and_keep_going\n", 0, 0, 0 );

	switch (error)
	{
	/* Cases where we keep going */
	case LDAP_SUCCESS:
	case LDAP_NO_SUCH_ATTRIBUTE:
	case LDAP_UNDEFINED_TYPE:
	case LDAP_CONSTRAINT_VIOLATION:
	case LDAP_TYPE_OR_VALUE_EXISTS:
	case LDAP_INVALID_SYNTAX:
	case LDAP_NO_SUCH_OBJECT:
	case LDAP_INVALID_DN_SYNTAX:
	case LDAP_IS_LEAF:
	case LDAP_INSUFFICIENT_ACCESS:
	case LDAP_NAMING_VIOLATION:
	case LDAP_OBJECT_CLASS_VIOLATION:
	case LDAP_NOT_ALLOWED_ON_NONLEAF:
	case LDAP_NOT_ALLOWED_ON_RDN:
	case LDAP_ALREADY_EXISTS:
	case LDAP_NO_OBJECT_CLASS_MODS:
		return_value = PR_TRUE;
		break;

	/* Cases where we stop and retry */
	case LDAP_OPERATIONS_ERROR:
	case LDAP_PROTOCOL_ERROR:
	case LDAP_TIMELIMIT_EXCEEDED:
	case LDAP_SIZELIMIT_EXCEEDED:
	case LDAP_STRONG_AUTH_NOT_SUPPORTED:
	case LDAP_STRONG_AUTH_REQUIRED:
	case LDAP_PARTIAL_RESULTS:
	case LDAP_REFERRAL:
	case LDAP_ADMINLIMIT_EXCEEDED:
	case LDAP_UNAVAILABLE_CRITICAL_EXTENSION:
	case LDAP_CONFIDENTIALITY_REQUIRED:
	case LDAP_SASL_BIND_IN_PROGRESS:
	case LDAP_INAPPROPRIATE_MATCHING:
	case LDAP_ALIAS_PROBLEM:
	case LDAP_ALIAS_DEREF_PROBLEM:
	case LDAP_INAPPROPRIATE_AUTH:
	case LDAP_INVALID_CREDENTIALS:
	case LDAP_BUSY:
	case LDAP_UNAVAILABLE:
	case LDAP_UNWILLING_TO_PERFORM:
	case LDAP_LOOP_DETECT:
	case LDAP_SORT_CONTROL_MISSING:
	case LDAP_INDEX_RANGE_ERROR:
	case LDAP_RESULTS_TOO_LARGE:
	case LDAP_AFFECTS_MULTIPLE_DSAS:
	case LDAP_OTHER:
	case LDAP_SERVER_DOWN:
	case LDAP_LOCAL_ERROR:
	case LDAP_ENCODING_ERROR:
	case LDAP_DECODING_ERROR:
	case LDAP_TIMEOUT:
	case LDAP_AUTH_UNKNOWN:
	case LDAP_FILTER_ERROR:
	case LDAP_USER_CANCELLED:
	case LDAP_PARAM_ERROR:
	case LDAP_NO_MEMORY:
	case LDAP_CONNECT_ERROR:
	case LDAP_NOT_SUPPORTED:
	case LDAP_CONTROL_NOT_FOUND:
	case LDAP_NO_RESULTS_RETURNED:
	case LDAP_MORE_RESULTS_TO_RETURN:
	case LDAP_CLIENT_LOOP:
	case LDAP_REFERRAL_LIMIT_EXCEEDED:
		return_value = PR_FALSE;
		break;
	}
	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_ignore_error_and_keep_going\n", 0, 0, 0 );
	return return_value;
}

static const char*
op2string(int op)
{
	LDAPDebug( LDAP_DEBUG_TRACE, "=> op2string\n", 0, 0, 0 );
	LDAPDebug( LDAP_DEBUG_TRACE, "<= op2string\n", 0, 0, 0 );
	switch (op) {
	case SLAPI_OPERATION_ADD:
		return "add";
	case SLAPI_OPERATION_MODIFY:
		return "modify";
	case SLAPI_OPERATION_DELETE:
		return "delete";
	case SLAPI_OPERATION_MODRDN:
		return "rename";
	case SLAPI_OPERATION_EXTENDED:
		return "extended";
	}
	
	return "unknown";
}

static void 
windows_dump_entry(const char *string, Slapi_Entry *e)
{
	int length = 0;
	char *buffer = NULL;
	if (slapi_is_loglevel_set(SLAPI_LOG_REPL))
	{
		buffer = slapi_entry2str(e,&length);
		slapi_log_error(SLAPI_LOG_REPL, NULL, "Windows sync entry: %s %s\n", string, buffer);
		if (buffer)
		{
			slapi_ch_free_string(&buffer);
		} 
	}
}

static void
map_dn_values(Private_Repl_Protocol *prp,Slapi_ValueSet *original_values, Slapi_ValueSet **mapped_values, int to_windows, int return_originals)
{
	Slapi_ValueSet *new_vs = NULL;
	Slapi_Value *original_value = NULL;
	int retval = 0;
	int i = 0;
	/* For each value: */
    i= slapi_valueset_first_value(original_values,&original_value);
    while ( i != -1 ) {

		int is_ours = 0;
		char *new_dn_string = NULL;
		const char *original_dn_string = NULL;
		int original_dn_string_length = 0;
		Slapi_DN *original_dn = NULL;

		original_dn_string = slapi_value_get_string(original_value);
		/* Sanity check the data was a valid string */
		original_dn_string_length = slapi_value_get_length(original_value);
		if (0 == original_dn_string_length) {
			slapi_log_error(SLAPI_LOG_REPL, NULL, "map_dn_values: length of dn is 0\n");
		}
		/* Make a sdn from the string */
		original_dn = slapi_sdn_new_dn_byref(original_dn_string);
		if (to_windows)
		{
			Slapi_Entry *local_entry = NULL;
			/* Try to get the local entry */
			retval = windows_get_local_entry(original_dn,&local_entry);
			if (0 == retval && local_entry)
			{
				int missing_entry = 0;
				Slapi_DN *remote_dn = NULL;
				/* Now map the DN */
				is_ours = is_subject_of_agreement_local(local_entry,prp->agmt);
				if (is_ours)
				{
					map_entry_dn_outbound(local_entry,&remote_dn,prp,&missing_entry, 0 /* don't want GUID form here */);
					if (remote_dn)
					{
						if (!missing_entry)
						{
							/* Success */
							if (return_originals)
							{
								new_dn_string = slapi_ch_strdup(slapi_sdn_get_dn(slapi_entry_get_sdn_const(local_entry)));
							} else 
							{
								new_dn_string = slapi_ch_strdup(slapi_sdn_get_dn(remote_dn));
							}
						}
						slapi_sdn_free(&remote_dn);
					} else
					{
						slapi_log_error(SLAPI_LOG_REPL, NULL, "map_dn_values: no remote dn found for %s\n", original_dn_string);					
					}
				} else
				{
					slapi_log_error(SLAPI_LOG_REPL, NULL, "map_dn_values: this entry is not ours %s\n", original_dn_string);
				}
			} else {
				slapi_log_error(SLAPI_LOG_REPL, NULL, "map_dn_values: no local entry found for %s\n", original_dn_string);
			}
			if (local_entry)
			{
				slapi_entry_free(local_entry);
				local_entry = NULL;
			}
		} else
		{
			Slapi_Entry *remote_entry = NULL;
			Slapi_DN *local_dn = NULL;
			/* Try to get the remote entry */
			retval = windows_get_remote_entry(prp,original_dn,&remote_entry);
			if (remote_entry && 0 == retval)
			{
				is_ours = is_subject_of_agreement_remote(remote_entry,prp->agmt);
				if (is_ours)
				{
					retval = map_entry_dn_inbound(remote_entry,&local_dn,prp->agmt);	
					if (0 == retval && local_dn)
					{
						if (return_originals)
						{
							new_dn_string = slapi_ch_strdup(slapi_sdn_get_dn(slapi_entry_get_sdn_const(remote_entry)));
						} else
						{
							new_dn_string = slapi_ch_strdup(slapi_sdn_get_dn(local_dn));
						}
						slapi_sdn_free(&local_dn);
					} else
					{
						slapi_log_error(SLAPI_LOG_REPL, NULL, "map_dn_values: no local dn found for %s\n", original_dn_string);
					}
				} else
				{
					slapi_log_error(SLAPI_LOG_REPL, NULL, "map_dn_values: this entry is not ours %s\n", original_dn_string);
				}
			} else
			{
				slapi_log_error(SLAPI_LOG_REPL, NULL, "map_dn_values: no remote entry found for %s\n", original_dn_string);
			}
			if (remote_entry)
			{
				slapi_entry_free(remote_entry);
				remote_entry = NULL;
			}
		}
		/* Extract the dn string and store in the new value */
		if (new_dn_string)
		{
			Slapi_Value *new_value = NULL;
			if (NULL == new_vs)
			{
				new_vs = slapi_valueset_new();
			}
			new_value = slapi_value_new_string_passin(new_dn_string);
			slapi_valueset_add_value(new_vs,new_value);
			slapi_value_free(&new_value);
		}
		/* If not then we skip it */
        i = slapi_valueset_next_value(original_values,i,&original_value);
		if (original_dn)
		{
			slapi_sdn_free(&original_dn);
		}
    }/* while */
	if (new_vs)
	{
		*mapped_values = new_vs;
	}
}

static void
windows_dump_ruvs(Object *supl_ruv_obj, Object *cons_ruv_obj)
{
	if (slapi_is_loglevel_set(SLAPI_LOG_REPL))
	{
		slapi_log_error(SLAPI_LOG_REPL, NULL, "acquire_replica, supplier RUV:\n");
		if (supl_ruv_obj) {
			RUV* sup = NULL;
			object_acquire(supl_ruv_obj);
			sup = (RUV*)  object_get_data ( supl_ruv_obj );
			ruv_dump (sup, "supplier", NULL);
			object_release(supl_ruv_obj);
		} else
		{
			slapi_log_error(SLAPI_LOG_REPL, NULL, "acquire_replica, supplier RUV = null\n");
		}
		slapi_log_error(SLAPI_LOG_REPL, NULL, "acquire_replica, consumer RUV:\n");

		if (cons_ruv_obj) 
		{
			RUV* con = NULL;
			object_acquire(cons_ruv_obj);
			con =  (RUV*) object_get_data ( cons_ruv_obj );
			ruv_dump (con,"consumer", NULL);
			object_release( cons_ruv_obj );
		} else {
			slapi_log_error(SLAPI_LOG_REPL, NULL, "acquire_replica, consumer RUV = null\n");
		}
	}
}

/*
 * Acquire exclusive access to a replica. Send a start replication extended
 * operation to the replica. The response will contain a success code, and
 * optionally the replica's update vector if acquisition is successful.
 * This function returns one of the following:
 * ACQUIRE_SUCCESS - the replica was acquired, and we have exclusive update access
 * ACQUIRE_REPLICA_BUSY - another master was updating the replica
 * ACQUIRE_FATAL_ERROR - something bad happened, and it's not likely to improve
 *                       if we wait.
 * ACQUIRE_TRANSIENT_ERROR - something bad happened, but it's probably worth
 *                           another try after waiting a while.
 * If ACQUIRE_SUCCESS is returned, then ruv will point to the replica's update
 * vector. It's possible that the replica does something goofy and doesn't
 * return us an update vector, so be prepared for ruv to be NULL (but this is
 * an error).
 */
int
windows_acquire_replica(Private_Repl_Protocol *prp, RUV **ruv, int check_ruv)
{
  
	int return_value = ACQUIRE_SUCCESS;
	ConnResult crc = 0;
	Repl_Connection *conn = NULL;
	Replica *replica = NULL;
	Object *supl_ruv_obj, *cons_ruv_obj = NULL;
	PRBool is_newer = PR_FALSE;
	RUV *r = NULL;

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_acquire_replica\n", 0, 0, 0 );

	PR_ASSERT(prp);

    if (prp->replica_acquired)  /* we already acquire replica */
    {
        slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
						"%s: Remote replica already acquired\n",
						agmt_get_long_name(prp->agmt));
								return_value = ACQUIRE_FATAL_ERROR;
		LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_acquire_replica\n", 0, 0, 0 );
        return ACQUIRE_SUCCESS;
    }

	if (NULL != ruv)
	{
		ruv_destroy ( ruv );
	}

	object_acquire(prp->replica_object);
	replica = object_get_data(prp->replica_object);
	supl_ruv_obj = replica_get_ruv ( replica );
	cons_ruv_obj = agmt_get_consumer_ruv(prp->agmt);

	windows_dump_ruvs(supl_ruv_obj,cons_ruv_obj);
	is_newer = ruv_is_newer ( supl_ruv_obj, cons_ruv_obj );
	if (is_newer)
	{
		slapi_log_error(SLAPI_LOG_REPL, NULL, "acquire_replica, supplier RUV is newer\n");
	}
	
	/* Handle the pristine case */
	if (cons_ruv_obj == NULL) 
	{
		*ruv = NULL;		
	} else 
	{
		r = (RUV*)  object_get_data(cons_ruv_obj); 
		*ruv = ruv_dup(r);
	}

	if ( supl_ruv_obj ) object_release ( supl_ruv_obj );
	if ( cons_ruv_obj ) object_release ( cons_ruv_obj );
	object_release (prp->replica_object);
	replica = NULL;

	/* Once we get here we have a valid ruv */
 	if (is_newer == PR_FALSE && check_ruv) { 
 		prp->last_acquire_response_code = NSDS50_REPL_UPTODATE;
		LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_acquire_replica - ACQUIRE_CONSUMER_WAS_UPTODATE\n", 0, 0, 0 );
 		return ACQUIRE_CONSUMER_WAS_UPTODATE; 
 	} 

	prp->last_acquire_response_code = NSDS50_REPL_REPLICA_NO_RESPONSE;

	/* Get the connection */
	conn = prp->conn;

	crc = windows_conn_connect(conn);
	if (CONN_OPERATION_FAILED == crc)
	{
		return_value = ACQUIRE_TRANSIENT_ERROR;
	}
	else if (CONN_SSL_NOT_ENABLED == crc)
	{
		return_value = ACQUIRE_FATAL_ERROR;
	}
	else
	{
		/* we don't want the timer to go off in the middle of an operation */
		windows_conn_cancel_linger(conn);
		/* Does the remote replica support the dirsync protocol? 
	       if it update the conn object */
		windows_conn_replica_supports_dirsync(conn); 
		if (CONN_NOT_CONNECTED == crc || CONN_OPERATION_FAILED == crc)
		{
			/* We don't know anything about the remote replica. Try again later. */
			return_value = ACQUIRE_TRANSIENT_ERROR;
		}
		else
		{
			/* Good to go. Start the protocol. */
			CSN *current_csn = NULL;
			Slapi_DN *replarea_sdn;

			/* Obtain a current CSN */
			replarea_sdn = agmt_get_replarea(prp->agmt);
			current_csn = get_current_csn(replarea_sdn);
			if (NULL != current_csn)
			{
			    return_value = ACQUIRE_SUCCESS;
			}
			else
			{
				/* Couldn't get a current CSN */
				slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
					"%s: Unable to obtain current CSN. "
					"Replication is aborting.\n",
					agmt_get_long_name(prp->agmt));
				return_value = ACQUIRE_FATAL_ERROR;
			}
			slapi_sdn_free(&replarea_sdn);
			csn_free(&current_csn);
		}
	}

	if (ACQUIRE_SUCCESS != return_value)
	{
		/* could not acquire the replica, so reinstate the linger timer, since this
		   means we won't call release_replica, which also reinstates the timer */
	     windows_conn_start_linger(conn);
	}
    else
    {
        /* replica successfully acquired */
        prp->replica_acquired = PR_TRUE;
    }

	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_acquire_replica\n", 0, 0, 0 );

	return return_value;
}

void
windows_release_replica(Private_Repl_Protocol *prp)
{
  LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_release_replica\n", 0, 0, 0 );

  PR_ASSERT(NULL != prp);
  PR_ASSERT(NULL != prp->conn);

  if (!prp->replica_acquired)
    return;

  windows_conn_start_linger(prp->conn);

  prp->replica_acquired = PR_FALSE;

  LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_release_replica\n", 0, 0, 0 );

}

static void
to_little_endian_double_bytes(UChar *unicode_password, int32_t unicode_password_length)
{
	int32_t i = 0;
	for (i = 0 ; i < unicode_password_length; i++) 
	{
		UChar c = unicode_password[i];
		char *byte_ptr = (char*)&(unicode_password[i]);
		byte_ptr[0] = (char)(c & 0xff);
		byte_ptr[1] = (char)(c >> 8);
	}
}

/* this entry had a password, handle it seperately */
/* http://support.microsoft.com/?kbid=269190 */
static int
send_password_modify(Slapi_DN *sdn, char *password, Private_Repl_Protocol *prp)
{
		ConnResult pw_return = 0;
		int is_nt4 = windows_private_get_isnt4(prp->agmt);

		if (is_nt4)
		{
			/* NT4 just wants a plaintext password */
			Slapi_Mods smods = {0};

			slapi_mods_init (&smods, 0);
			slapi_mods_add_string(&smods, LDAP_MOD_REPLACE, "UnicodePwd", password);

			pw_return = windows_conn_send_modify(prp->conn, slapi_sdn_get_dn(sdn), slapi_mods_get_ldapmods_byref(&smods), NULL, NULL );

			slapi_mods_done(&smods);

		} else
		{
			/* We will attempt to bind to AD with the new password first. We do
			 * this to avoid playing a password change that originated from AD
			 * back to AD.  If we just played the password change back, then
			 * both sides would be in sync, but AD would contain the new password
			 * twice in it's password history, which undermines the password
			 * history policies in AD. */
			if (windows_check_user_password(prp->conn, sdn, password)) {
				char *quoted_password = NULL;
				/* AD wants the password in quotes ! */
				quoted_password = PR_smprintf("\"%s\"",password);
				if (quoted_password)
				{
					LDAPMod *pw_mods[2];
					LDAPMod pw_mod;
					struct berval bv = {0};
					UChar *unicode_password = NULL;
					int32_t unicode_password_length = 0; /* Length in _characters_ */
					int32_t buffer_size = 0; /* Size in _characters_ */
					UErrorCode error = U_ZERO_ERROR;
					struct berval *bvals[2];
					/* Need to UNICODE encode the password here */
					/* It's one of those 'ask me first and I will tell you the buffer size' functions */
					u_strFromUTF8(NULL, 0, &unicode_password_length, quoted_password, strlen(quoted_password), &error);
					buffer_size = unicode_password_length;
					unicode_password = (UChar *)slapi_ch_malloc(unicode_password_length * sizeof(UChar));
					if (unicode_password) {
						error = U_ZERO_ERROR;
						u_strFromUTF8(unicode_password, buffer_size, &unicode_password_length, quoted_password, strlen(quoted_password), &error);
	
						/* As an extra special twist, we need to send the unicode in little-endian order for AD to be happy */
						to_little_endian_double_bytes(unicode_password, unicode_password_length);
	
						bv.bv_len = unicode_password_length * sizeof(UChar);
						bv.bv_val = (char*)unicode_password;
				
						bvals[0] = &bv; 
						bvals[1] = NULL;
						
						pw_mod.mod_type = "UnicodePwd";
						pw_mod.mod_op = LDAP_MOD_REPLACE | LDAP_MOD_BVALUES;
						pw_mod.mod_bvalues = bvals;
					
						pw_mods[0] = &pw_mod;
						pw_mods[1] = NULL;

						pw_return = windows_conn_send_modify(prp->conn, slapi_sdn_get_dn(sdn), pw_mods, NULL, NULL );

						slapi_ch_free((void**)&unicode_password);
					}
					PR_smprintf_free(quoted_password);
				}
			} else {
				slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
					"%s: AD already has the current password for %s. "
					"Not sending password modify to AD.\n",
					agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(sdn));
			}
		}

		return pw_return;
}

static int
send_accountcontrol_modify(Slapi_DN *sdn, Private_Repl_Protocol *prp)
{
	ConnResult mod_return = 0;
	Slapi_Mods smods = {0};

    slapi_mods_init (&smods, 0);
	slapi_mods_add_string(&smods, LDAP_MOD_REPLACE, "userAccountControl", "512");

	mod_return = windows_conn_send_modify(prp->conn, slapi_sdn_get_dn(sdn), slapi_mods_get_ldapmods_byref(&smods), NULL, NULL );

    slapi_mods_done(&smods);
	return mod_return;
}

static int
windows_entry_has_attr_and_value(Slapi_Entry *e, const char *attrname, char *value)
{
	int retval = 0;
	Slapi_Attr *attr = NULL;
	if (NULL == e || NULL == attrname)
	{
		return retval;
	}
	/* see if the entry has the specified attribute name */
	if (0 == slapi_entry_attr_find(e, attrname, &attr) && attr)
	{
		/* if value is not null, see if the attribute has that
		   value */
		if (value)
		{
			Slapi_Value *v = NULL;
			int index = 0;
			for (index = slapi_attr_first_value(attr, &v);
				 v && (index != -1);
				 index = slapi_attr_next_value(attr, index, &v))
			{
				const char *s = slapi_value_get_string(v);
				if (NULL == s)
				{
					continue;
				}
				if (0 == strcasecmp(s, value))
				{
					retval = 1;
					break;
				}
			}
		}
	}
	return retval;
}

static void
windows_is_local_entry_user_or_group(Slapi_Entry *e, int *is_user, int *is_group)
{
	*is_user = windows_entry_has_attr_and_value(e,"objectclass","ntuser");
	*is_group = windows_entry_has_attr_and_value(e,"objectclass","ntgroup");
}

static void
windows_is_remote_entry_user_or_group(Slapi_Entry *e, int *is_user, int *is_group)
{
	*is_user = windows_entry_has_attr_and_value(e,"objectclass","person");
	*is_group = windows_entry_has_attr_and_value(e,"objectclass","group");
}

static int
add_remote_entry_allowed(Slapi_Entry *e)
{
	/* We say yes if the entry has the ntUserCreateNewAccount attribute set in the case of a user, or the ntGroupDeleteGroup
	 * attribute set in the case of a group
	 */
	/* Is this a user or a group ? */
	int is_user = 0;
	int is_group = 0;
	char *delete_attr = NULL;

	windows_is_local_entry_user_or_group(e,&is_user,&is_group);
	if (!is_user && !is_group)
	{
		/* Neither fish nor foul.. */
		return -1;
	}
	if (is_user && is_group) 
	{
		/* Now that's just really strange... */
		return -1;
	}
	if (is_user) 
	{
		delete_attr = "ntUserCreateNewAccount";
	} else 
	{
		delete_attr = "ntGroupCreateNewGroup";
	}
	/* Now test if the attribute value is set */
	return windows_entry_has_attr_and_value(e,delete_attr,"true");
}

/* Tells us if we're allowed to add this (remote) entry locally */
static int
add_local_entry_allowed(Private_Repl_Protocol *prp, Slapi_Entry *e)
{
	int is_user = 0;
	int is_group = 0;

	windows_is_remote_entry_user_or_group(e,&is_user,&is_group);	

	if (is_user)
	{
		return windows_private_create_users(prp->agmt);
	} 
	if (is_group)
	{
		return windows_private_create_groups(prp->agmt);
	}
	/* Default to 'no' */
	return 0;
}

static int
delete_remote_entry_allowed(Slapi_Entry *e)
{
	/* We say yes if the entry has the ntUserDeleteAccount attribute set in the case of a user, or the ntGroupDeleteGroup
	 * attribute set in the case of a group
	 */
	/* Is this a user or a group ? */
	int is_user = 0;
	int is_group = 0;
	char *delete_attr = NULL;

	windows_is_local_entry_user_or_group(e,&is_user,&is_group);
	if (!is_user && !is_group)
	{
		/* Neither fish nor foul.. */
		return 0;
	}
	if (is_user && is_group) 
	{
		/* Now that's just really strange... */
		return 0;
	}
	if (is_user) 
	{
		delete_attr = "ntUserDeleteAccount";
	} else 
	{
		delete_attr = "ntGroupDeleteGroup";
	}
	/* Now test if the attribute value is set */
	return windows_entry_has_attr_and_value(e,delete_attr,"true");
}

static void
windows_log_add_entry_remote(const Slapi_DN *local_dn,const Slapi_DN *remote_dn)
{
	const char* local_dn_string = slapi_sdn_get_dn(local_dn);
	const char* remote_dn_string = slapi_sdn_get_dn(remote_dn);
	slapi_log_error(SLAPI_LOG_REPL, NULL, "Attempting to add entry %s to AD for local entry %s\n",remote_dn_string,local_dn_string);
}

static ConnResult
process_replay_add(Private_Repl_Protocol *prp, slapi_operation_parameters *op, Slapi_Entry *local_entry, Slapi_DN *local_dn, Slapi_DN *remote_dn, int is_user, int missing_entry, char **password)
{
	int remote_add_allowed = add_remote_entry_allowed(local_entry);
	ConnResult return_value = 0;
	int rc = 0;

	slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
		"%s: process_replay_add: dn=\"%s\" (%s,%s)\n", agmt_get_long_name(prp->agmt),
		slapi_sdn_get_dn(remote_dn), missing_entry ? "not present" : "already present",
		remote_add_allowed ? "add allowed" : "add not allowed");

	if (missing_entry)
	{
		/* If DN is a GUID, we need to attempt to reanimate the tombstone */
		if (is_guid_dn(remote_dn)) {
			int tstone_exists = 0;
			int reanimate_rc = -1;
			char *new_dn_string = NULL;
			char *cn_string = NULL;
			Slapi_DN *tombstone_dn = NULL;

			slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
				"%s: process_replay_add: dn=\"%s\" appears to have been"
				"  deleted on remote side.  Searching for tombstone.\n",
				agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(remote_dn));

			/* Map local entry to tombstone DN and verify that it exists on
			 * AD side */
			map_windows_tombstone_dn(local_entry, &tombstone_dn, prp, &tstone_exists);

			/* We can't use a GUID DN, so rewrite to the new mapped DN. */
			cn_string = slapi_entry_attr_get_charptr(local_entry,"cn");
			if (!cn_string) {
				cn_string = slapi_entry_attr_get_charptr(local_entry,"ntuserdomainid");
			}

			if (cn_string) {
				char *container_str = NULL;
				const char *suffix = slapi_sdn_get_dn(windows_private_get_windows_subtree(prp->agmt));

				container_str = extract_container(slapi_entry_get_sdn_const(local_entry),
					windows_private_get_directory_subtree(prp->agmt));
				new_dn_string = PR_smprintf("cn=%s,%s%s", cn_string, container_str, suffix);

				if (new_dn_string) {
					/* If the tombstone exists, reanimate it. If the tombstone
					 * does not exist, we'll create a new entry in AD, which
					 * will end up getting a new GUID generated by AD. */
					if (tstone_exists) {
						slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
							"%s: process_replay_add: Reanimating tombstone (dn=\"%s\") to"
							" normal entry (dn=\"%s\").\n", agmt_get_long_name(prp->agmt),
							slapi_sdn_get_dn(tombstone_dn), new_dn_string);
						reanimate_rc = windows_reanimate_tombstone(prp, tombstone_dn, (const char *)new_dn_string);
						if (reanimate_rc != 0) {
							slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
								"%s: process_replay_add: Reanimation of tombstone"
								" (dn=\"%s\") failed.  A new entry (dn=\"%s\")"
								" will be added instead.\n", agmt_get_long_name(prp->agmt),
								slapi_sdn_get_dn(tombstone_dn), new_dn_string);
						}
					}

					/* Clear out the old GUID DN and use the new one. We hand off the memory
					 * for new_dn_string into the remote_dn. */
					slapi_sdn_done(remote_dn);
					slapi_sdn_set_dn_passin(remote_dn, new_dn_string);
				}

				slapi_ch_free_string(&cn_string);
				slapi_ch_free_string(&container_str);
			}

			if (tombstone_dn) {
				slapi_sdn_free(&tombstone_dn);
			}

			if (reanimate_rc == 0) {
				/* We reanimated a tombstone, so an add won't work.  We
				 * fallback to doing a modify of the newly reanimated
				 * entry. */
				goto modify_fallback;
			}
		}

		if (remote_add_allowed) {
			LDAPMod **entryattrs = NULL;
			Slapi_Entry *mapped_entry = NULL;
			/* First map the entry */
			rc = windows_create_remote_entry(prp,op->p.p_add.target_entry, remote_dn, &mapped_entry, password);
			/* Convert entry to mods */
			if (0 == rc && mapped_entry) 
			{
				(void)slapi_entry2mods (mapped_entry , NULL /* &entrydn : We don't need it */, &entryattrs);
				slapi_entry_free(mapped_entry);
				mapped_entry = NULL;
				if (NULL == entryattrs)
				{
					slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
						"%s: windows_replay_update: Cannot convert entry to LDAPMods.\n",
						agmt_get_long_name(prp->agmt));
					return_value = CONN_LOCAL_ERROR;
				}
				else
				{
					windows_log_add_entry_remote(local_dn, remote_dn);
					return_value = windows_conn_send_add(prp->conn, slapi_sdn_get_dn(remote_dn),
						entryattrs, NULL, NULL);
					/* It's possible that the entry already exists in AD, in which
					 * case we fall back to modify it */
					/* NGK - This fallback doesn't seem to happen, at least not at this point
					 * in the code.  The only chance to fallback to doing a modify is if
					 * missing_entry is set to 0 at the top of this function. */
					if (return_value)
					{
						slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
							"%s: windows_replay_update: Cannot replay add operation.\n",
							agmt_get_long_name(prp->agmt));
					}
					ldap_mods_free(entryattrs, 1);
					entryattrs = NULL;
				}
			} else 
			{
				slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
					"%s: process_replay_add: failed to create mapped entry dn=\"%s\"\n",
					agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(remote_dn));
			}
		}
	} else 
	{
		Slapi_Entry *remote_entry;

modify_fallback:
		remote_entry = NULL;
		/* Fetch the remote entry */
		rc = windows_get_remote_entry(prp, remote_dn,&remote_entry);
		if (0 == rc && remote_entry) {
			return_value = windows_update_remote_entry(prp,remote_entry,local_entry);
		}
		if (remote_entry)
		{
			slapi_entry_free(remote_entry);
		}
	}
	return return_value;
}

/*
 * Given a changelog entry, construct the appropriate LDAP operations to sync
 * the operation to AD.
 */
ConnResult
windows_replay_update(Private_Repl_Protocol *prp, slapi_operation_parameters *op)
{
	ConnResult return_value = 0;
	int rc = 0;
	char *password = NULL;
	int is_ours = 0;
	int is_user = 0;
	int is_group = 0;
	Slapi_DN *remote_dn = NULL;
	Slapi_DN *local_dn = NULL;
	Slapi_Entry *local_entry = NULL;
		
	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_replay_update\n", 0, 0, 0 );

	local_dn = slapi_sdn_new_dn_byref( op->target_address.dn );

	/* Since we have the target uniqueid in the op structure, let's
	 * fetch the local entry here using it. We do not want to search
	 * across tombstone entries unless we are dealing with a delete
	 * operation here since searching across tombstones can be very
	 * inefficient as the tombstones build up.
	 */
	if (op->operation_type != SLAPI_OPERATION_DELETE) {
		rc = windows_get_local_entry_by_uniqueid(prp, op->target_address.uniqueid, &local_entry);
	} else {
		rc = windows_get_local_tombstone_by_uniqueid(prp, op->target_address.uniqueid, &local_entry);
	}

	if (rc) 
	{
		slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
			"%s: windows_replay_update: failed to fetch local entry for %s operation dn=\"%s\"\n",
			agmt_get_long_name(prp->agmt),
			op2string(op->operation_type), op->target_address.dn);
		goto error;
	}

	is_ours = is_subject_of_agreement_local(local_entry, prp->agmt);
	windows_is_local_entry_user_or_group(local_entry,&is_user,&is_group);

	slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
		"%s: windows_replay_update: Looking at %s operation local dn=\"%s\" (%s,%s,%s)\n",
		agmt_get_long_name(prp->agmt),
		op2string(op->operation_type), op->target_address.dn, is_ours ? "ours" : "not ours", 
		is_user ? "user" : "not user", is_group ? "group" : "not group");

	if (is_ours && (is_user || is_group) ) {
		int missing_entry = 0;
		/* Make the entry's DN */
		rc = map_entry_dn_outbound(local_entry,&remote_dn,prp,&missing_entry, 1);
		if (rc || NULL == remote_dn) 
		{
			slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
				"%s: windows_replay_update: failed map dn for %s operation dn=\"%s\"\n",
				agmt_get_long_name(prp->agmt),
				op2string(op->operation_type), op->target_address.dn);
			goto error;
		}
		slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
			"%s: windows_replay_update: Processing %s operation local dn=\"%s\" remote dn=\"%s\"\n",
			agmt_get_long_name(prp->agmt),
			op2string(op->operation_type), op->target_address.dn, slapi_sdn_get_dn(remote_dn));
		switch (op->operation_type) {
		/*
		  we should check the modify case first and check the list of mods -
		  if the magic objectclass (ntuser) and attributes (ntUserCreateNewAccount
		  or ntGroupCreateNewAccount) then we should fall through to the ADD case
		  since the user wants to add the user to AD - could maybe just change
		  process_replay_add slightly, to add the mods list from the modify
		  operation - process_replay_add already turns the entry into a mods list
		  to pass to the ldap add operation, so it should not be too much more
		  trouble to apply the additional mods from the modify operation - we'll
		  have to pass in local entry, or perhaps just change the operation from
		  modify to an add, and set the op->p.p_add.target_entry to the local_entry
		  which gets retrieved above
		*/
		case SLAPI_OPERATION_ADD:
			return_value = process_replay_add(prp,op,local_entry,local_dn,remote_dn,is_user,missing_entry,&password);
			break;
		case SLAPI_OPERATION_MODIFY:
			{
				LDAPMod **mapped_mods = NULL;

				windows_map_mods_for_replay(prp,op->p.p_modify.modify_mods, &mapped_mods, is_user, &password);
				if (is_user) {
					winsync_plugin_call_pre_ad_mod_user_mods_cb(prp->agmt,
																windows_private_get_raw_entry(prp->agmt),
																local_dn,
																op->p.p_modify.modify_mods,
																remote_dn,
																&mapped_mods);
				} else if (is_group) {
					winsync_plugin_call_pre_ad_mod_group_mods_cb(prp->agmt,
																 windows_private_get_raw_entry(prp->agmt),
																 local_dn,
																 op->p.p_modify.modify_mods,
																 remote_dn,
																 &mapped_mods);
				}

				/* It's possible that the mapping process results in an empty mod list, in which case we don't bother with the replay */
				if ( mapped_mods == NULL || *(mapped_mods)== NULL )
				{
					return_value = CONN_OPERATION_SUCCESS;
				} else 
				{
					if (slapi_is_loglevel_set(SLAPI_LOG_REPL))
					{
						int i = 0;
						slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,"dump mods for replay update:");
						for(i=0;mapped_mods[i];i++)
						{
							slapi_mod_dump(mapped_mods[i],i);
						}
					}
					return_value = windows_conn_send_modify(prp->conn, slapi_sdn_get_dn(remote_dn), mapped_mods, NULL, NULL /* returned controls */);
				}
				if (mapped_mods)
				{
					ldap_mods_free(mapped_mods,1);
					mapped_mods = NULL;
				}
			}
			break;
		case SLAPI_OPERATION_DELETE:
			if (delete_remote_entry_allowed(local_entry))
			{
				return_value = windows_conn_send_delete(prp->conn, slapi_sdn_get_dn(remote_dn), NULL, NULL /* returned controls */);
					slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
					"%s: windows_replay_update: deleted remote entry, dn=\"%s\", result=%d\n",
					agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(remote_dn), return_value);
			} else 
			{
				slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
					"%s: windows_replay_update: delete not allowed on remote entry, dn=\"%s\"\n",
					agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(remote_dn));
			}
			break;
		case SLAPI_OPERATION_MODRDN:
			return_value = windows_conn_send_rename(prp->conn, op->target_address.dn,
				op->p.p_modrdn.modrdn_newrdn,
				op->p.p_modrdn.modrdn_newsuperior_address.dn,
				op->p.p_modrdn.modrdn_deloldrdn,
				NULL, NULL /* returned controls */);
			break;
		default:
			slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name, "%s: replay_update: Unknown "
				"operation type %d found in changelog - skipping change.\n",
				agmt_get_long_name(prp->agmt), op->operation_type);
		}
		if (password) 
		{
			/* We need to have a non-GUID dn in send_password_modify in order to
			 * bind as the user to check if we need to send the password change.
			 * You are supposed to be able to bind using a GUID dn, but it doesn't
			 * seem to work over plain LDAP. */
			if (is_guid_dn(remote_dn)) {
				Slapi_DN *remote_dn_norm = NULL;
				int norm_missing = 0;

				map_entry_dn_outbound(local_entry,&remote_dn_norm,prp,&norm_missing, 0);
				return_value = send_password_modify(remote_dn_norm, password, prp);
				slapi_sdn_free(&remote_dn_norm);
			} else {
				return_value = send_password_modify(remote_dn, password, prp);
			}

			if (return_value)
			{
				slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
					"%s: windows_replay_update: update password returned %d\n",
					agmt_get_long_name(prp->agmt), return_value );
			} else {
				/* If we successfully added an entry, and then subsequently changed
				 * its password, THEN we need to change its status in AD in order
				 * that it can be used (otherwise the user is marked as disabled).
				 * To do this we set this attribute and value:
				 *   userAccountControl: 512 */
				if (op->operation_type == SLAPI_OPERATION_ADD && missing_entry)
				{
					return_value = send_accountcontrol_modify(remote_dn, prp);
				}
			}
		}
	} else {
		/* We ignore operations that target entries outside of our sync'ed subtree, or which are not Windows users or groups */
	}
error:
	if (local_entry)
	{
		slapi_entry_free(local_entry);
	}
	if (local_dn)
	{
		slapi_sdn_free (&local_dn);
	}
	if (remote_dn)
	{
		slapi_sdn_free(&remote_dn);
	}
	return return_value;
}

static int
is_straight_mapped_attr(const char *type, int is_user /* or group */, int is_nt4)
{
	int found = 0;
	size_t offset = 0;
	char *this_attr = NULL;
	char **list = is_user ? (is_nt4 ? nt4_user_matching_attributes : windows_user_matching_attributes) : (is_nt4 ? nt4_group_matching_attributes : windows_group_matching_attributes);
	/* Look for the type in the list of straight mapped attrs for the appropriate object type */
	while ((this_attr = list[offset]))
	{
		if (0 == slapi_attr_type_cmp(this_attr, type, SLAPI_TYPE_CMP_SUBTYPE))
		{
			found = 1;
			break;
		}
		offset++;
	}
	return found;
}
		
static void 
windows_map_attr_name(const char *original_type , int to_windows, int is_user, int is_create, char **mapped_type, int *map_dn)
{
	char *new_type = NULL;
	windows_attribute_map *our_map = is_user ? user_attribute_map : group_attribute_map;
	windows_attribute_map *this_map = NULL;
	size_t offset = 0;

	*mapped_type = NULL;

	/* Iterate over the map entries looking for the type we have */
	while((this_map = &(our_map[offset])))
	{
		char *their_name = to_windows ? this_map->windows_attribute_name : this_map->ldap_attribute_name;
		char *our_name = to_windows ? this_map->ldap_attribute_name : this_map->windows_attribute_name;

		if (NULL == their_name)
		{
			/* End of the list */
			break;
		}
		if (0 == slapi_attr_type_cmp(original_type, our_name, SLAPI_TYPE_CMP_SUBTYPE))
		{
			if (!is_create && (this_map->create_type == createonly))
			{
				/* Skip create-only entries if we're not creating */
			} else
			{
				if ( (this_map->map_type == towindowsonly && to_windows) || (this_map->map_type == fromwindowsonly && !to_windows) 
					|| (this_map->map_type == bidirectional) )
				{
					new_type = slapi_ch_strdup(their_name);
					*map_dn = (this_map->attr_type == dnmap);
					break;
				}
			}
		}
		offset++;
	}

	if (new_type)
	{
		*mapped_type = new_type;
	}
}

/* 
 * Make a new entry suitable for the sync destination (indicated by the to_windows argument).
 * Returns the new entry ready to be passed to an LDAP ADD operation, either remote or local.
 * Also returns the plaintext value of any password contained in the original entry (only for the
 * to_windows direction). This is because passwords must be added to entries after they are added in AD.
 * Caller must free the new entry and any password returned.
 */
static int 
windows_create_remote_entry(Private_Repl_Protocol *prp,Slapi_Entry *original_entry, Slapi_DN *remote_sdn, Slapi_Entry **remote_entry, char** password) 
{  
	int retval = 0;
	char *entry_string = NULL;
	Slapi_Entry *new_entry = NULL;
	int rc = 0;
	int is_user = 0; 
	int is_group = 0;
	Slapi_Attr *attr = NULL;
	char *username = NULL;
	const char *dn_string = NULL;
	char *fqusername = NULL;
	const char *domain_name = windows_private_get_windows_domain(prp->agmt); 
	int is_nt4 = windows_private_get_isnt4(prp->agmt);

	char *remote_user_entry_template = 
		"dn: %s\n"
		"objectclass:top\n"
   		"objectclass:person\n"
		"objectclass:organizationalperson\n"
		"objectclass:user\n"
		"userPrincipalName:%s\n";

	char *remote_group_entry_template = 
		"dn: %s\n"
		"objectclass:top\n"
   		"objectclass:group\n";

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_create_remote_entry\n", 0, 0, 0 );

	windows_is_local_entry_user_or_group(original_entry,&is_user,&is_group);

	/* Create a new entry */
	/* Give it its DN and samaccountname */
	username = extract_ntuserdomainid_from_entry(original_entry);
	if (NULL == username)
	{
		goto error;
	}
	fqusername = PR_smprintf("%s@%s",username,domain_name);
	dn_string = slapi_sdn_get_dn(remote_sdn);
	if (is_user)
	{
		entry_string = slapi_ch_smprintf(remote_user_entry_template, dn_string, fqusername);
	} else
	{
		entry_string = slapi_ch_smprintf(remote_group_entry_template, dn_string);
	}
	PR_smprintf_free(fqusername);
	if (NULL == entry_string) 
	{
		goto error;
	}
	new_entry = slapi_str2entry(entry_string, 0);
	slapi_ch_free_string(&entry_string);
	if (NULL == new_entry) 
	{
		goto error;
	}
	/* Map the appropriate attributes sourced from the remote entry */
	/* Iterate over the local entry's attributes */
    for (rc = slapi_entry_first_attr(original_entry, &attr); rc == 0;
			rc = slapi_entry_next_attr(original_entry, attr, &attr)) 
	{
		char *type = NULL;
		Slapi_ValueSet *vs = NULL;
		int mapdn = 0;

		slapi_attr_get_type( attr, &type );
		slapi_attr_get_valueset(attr,&vs);

		if ( is_straight_mapped_attr(type,is_user,is_nt4) )
		{
			/* The initials attribute is a special case.  AD has a constraint
                         * that limits the value length.  If we're sending a change to
                         * the initials attribute to AD, we trim if neccessary.
                         */
                         if (0 == slapi_attr_type_cmp(type, "initials", SLAPI_TYPE_CMP_SUBTYPE)) {
				int i = 0;
				const char *initials_value = NULL;
                                Slapi_Value *value = NULL;

                                i = slapi_valueset_first_value(vs,&value);
				while (i >= 0) {
                                	initials_value = slapi_value_get_string(value);

					/* If > AD_INITIALS_LENGTH, trim the value */
					if (strlen(initials_value) > AD_INITIALS_LENGTH) {
						char *new_initials = PL_strndup(initials_value, AD_INITIALS_LENGTH);
						/* the below hands off memory */
						slapi_value_set_string_passin(value, new_initials);
						slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
							"%s: windows_create_remote_entry: "
							"Trimming initials attribute to %d characters.\n",
							agmt_get_long_name(prp->agmt), AD_INITIALS_LENGTH);
					}

					i = slapi_valueset_next_value(vs, i, &value);
				}
			}
			/* copy over the attr values */
			slapi_entry_add_valueset(new_entry,type,vs);
		} else 
		{
			char *new_type = NULL;

			windows_map_attr_name(type , 1 /* to windows */, is_user, 1 /* create */, &new_type, &mapdn);
			if (new_type)
			{
				if (mapdn)
				{
					Slapi_ValueSet *mapped_values = NULL;
					map_dn_values(prp,vs,&mapped_values, 1 /* to windows */,0);
					if (mapped_values) 
					{
						slapi_entry_add_valueset(new_entry,new_type,mapped_values);
						slapi_valueset_free(mapped_values);
						mapped_values = NULL;
					}
				} else 
				{
					Slapi_Attr *new_attr = NULL;

					/* AD treats streetAddress as a single-valued attribute, while we define it
					 * as a multi-valued attribute as it's defined in rfc 4519.  We only
					 * sync the first value to AD to avoid a constraint violation.
					 */
					if (0 == slapi_attr_type_cmp(new_type, "streetAddress", SLAPI_TYPE_CMP_SUBTYPE)) {
						if (slapi_valueset_count(vs) > 1) {
							int i = 0;
							Slapi_Value *value = NULL;
							Slapi_Value *new_value = NULL;

							i = slapi_valueset_first_value(vs,&value);
							if (i >= 0) {
								/* Dup the first value, trash the valueset, then copy
								 * in the dup'd value. */
								new_value = slapi_value_dup(value);
								slapi_valueset_done(vs);
								/* The below hands off the memory to the valueset */
								slapi_valueset_add_value_ext(vs, new_value, SLAPI_VALUE_FLAG_PASSIN);
							}
						}
                        		}
					
					slapi_entry_add_valueset(new_entry,type,vs);

					/* Reset the type to new_type here.  This is needed since
					 * slapi_entry_add_valueset will create the Slapi_Attrs using
					 * the schema definition, which can reset the type to something
					 * other than the type you pass into it. To be safe, we just
					 * create the attributes with the old type, then reset them. */
					if (slapi_entry_attr_find(new_entry, type, &new_attr) == 0) {
						slapi_attr_set_type(new_attr, new_type);
					}
				}
				slapi_ch_free_string(&new_type);
			}
			/* password mods are treated specially */
			if (0 == slapi_attr_type_cmp(type, PSEUDO_ATTR_UNHASHEDUSERPASSWORD, SLAPI_TYPE_CMP_SUBTYPE) )
			{
				const char *password_value = NULL;
				Slapi_Value *value = NULL;

				slapi_valueset_first_value(vs,&value);
				password_value = slapi_value_get_string(value);
				/* We need to check if the first character of password_value is an 
				 * opening brace since strstr will simply return it's first argument
				 * if it is an empty string. */
				if (password_value && (*password_value == '{')) {
					if (strchr( password_value, '}' )) {
						/* A storage scheme is present.  Check if it's the
						 * clear storage scheme. */
						if ((strlen(password_value) >= PASSWD_CLEAR_PREFIX_LEN + 1) &&
						    (strncasecmp(password_value, PASSWD_CLEAR_PREFIX, PASSWD_CLEAR_PREFIX_LEN) == 0)) {
							/* This password is in clear text.  Strip off the clear prefix
							 * and sync it. */
							*password = slapi_ch_strdup(password_value + PASSWD_CLEAR_PREFIX_LEN);
						} else {
							/* This password is stored in a non-cleartext format.
							 * We can only sync cleartext passwords. */
							slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
								"%s: windows_create_remote_entry: "
								"Password is already hashed.  Not syncing.\n",
								agmt_get_long_name(prp->agmt));
						}
					} else {
						/* This password doesn't have a storage prefix but
						 * just happens to start with the '{' character.  We'll
						 * assume that it's just a cleartext password without
						 * the proper storage prefix. */
						*password = slapi_ch_strdup(password_value);
					}
				} else {
					/* This password has no storage prefix, or the password is empty */
					*password = slapi_ch_strdup(password_value);
				}
			}

		}
		if (vs) 
		{
			slapi_valueset_free(vs);
			vs = NULL;
		}
	}
	/* NT4 must have the groupType attribute set for groups.  If it is not present, we will
	 * add it here with a value of 2 (global group).
	 */
	if (is_nt4 && is_group)
	{
		Slapi_Attr *ap = NULL;
		if(slapi_entry_attr_find(new_entry, "groupType", &ap))
		{
			/* groupType attribute wasn't found, so we'll add it */
			slapi_entry_attr_set_int(new_entry, "groupType", 2 /* global group */);
		}
	}

	if (remote_entry) 
	{
		*remote_entry = new_entry;
	}
error:
	if (username)
	{
		slapi_ch_free_string(&username);
	}
	if (new_entry) 
	{
		windows_dump_entry("Created new remote entry:\n",new_entry);
	}
	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_create_remote_entry: %d\n", retval, 0, 0 );
	return retval;
}

#ifdef FOR_DEBUGGING
/* the entry has already been translated, so be sure to search for ntuserid
   and not samaccountname or anything else. */

static Slapi_Entry* 
windows_entry_already_exists(Slapi_Entry *e){

	int rc = 0;
	Slapi_DN *sdn = NULL;
	Slapi_Entry *entry = NULL;

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_entry_already_exists\n", 0, 0, 0 );

	sdn = slapi_entry_get_sdn(e);
	rc  = slapi_search_internal_get_entry( sdn, NULL, &entry, repl_get_plugin_identity (PLUGIN_MULTIMASTER_REPLICATION));

	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_entry_already_exists\n", 0, 0, 0 );

	if (rc == LDAP_SUCCESS)
	{
		return entry;
	}
	else
	{
		return NULL;
	}

}
#endif

static int 
windows_delete_local_entry(Slapi_DN *sdn){

	Slapi_PBlock *pb = NULL;
	int return_value = 0;

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_delete_local_entry\n", 0, 0, 0 );

	pb = slapi_pblock_new();
	slapi_delete_internal_set_pb(pb, slapi_sdn_get_dn(sdn), NULL, NULL, repl_get_plugin_identity(PLUGIN_MULTIMASTER_REPLICATION), 0);
	slapi_delete_internal_pb(pb);
	slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_RESULT, &return_value);
	slapi_pblock_destroy(pb);

	if (return_value) {
		slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
			"delete operation on local entry %s returned: %d\n", slapi_sdn_get_dn(sdn), return_value);
	}
	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_delete_local_entry: %d\n", return_value, 0, 0 );

	return return_value;
}

static void 
windows_map_mods_for_replay(Private_Repl_Protocol *prp,LDAPMod **original_mods, LDAPMod ***returned_mods, int is_user, char** password) 
{
	Slapi_Mods smods = {0};
	Slapi_Mods mapped_smods = {0};
	LDAPMod *mod = NULL;
	int is_nt4 = windows_private_get_isnt4(prp->agmt);

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_map_mods_for_replay\n", 0, 0, 0 );

	/* Iterate through the original mods, looking each attribute type up in the maps for either user or group */
	
	slapi_mods_init_byref(&smods, original_mods);
	slapi_mods_init(&mapped_smods,10);
	mod = slapi_mods_get_first_mod(&smods);
	while(mod)
	{
		char *attr_type = mod->mod_type;
		int mapdn = 0;

		/* Check to see if this attribute is passed through */
		if (is_straight_mapped_attr(attr_type,is_user,is_nt4)) {
			/* The initials attribute is a special case.  AD has a constraint
			 * that limits the value length.  If we're sending a change to
			 * the initials attribute to AD, we trim if neccessary.
			 */
			if (0 == slapi_attr_type_cmp(attr_type, "initials", SLAPI_TYPE_CMP_SUBTYPE)) {
				int i;
				for (i = 0; mod->mod_bvalues[i] != NULL; i++) {
					/* If > AD_INITIALS_LENGTH, trim the value */
					if (mod->mod_bvalues[i]->bv_len > AD_INITIALS_LENGTH) {
						mod->mod_bvalues[i]->bv_val[AD_INITIALS_LENGTH] = '\0';
						mod->mod_bvalues[i]->bv_len = AD_INITIALS_LENGTH;
						slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
							"%s: windows_map_mods_for_replay: "
							"Trimming initials attribute to %d characters.\n",
							agmt_get_long_name(prp->agmt), AD_INITIALS_LENGTH);
					}
				}
			}

			/* copy over the mod */
			slapi_mods_add_modbvps(&mapped_smods,mod->mod_op,attr_type,mod->mod_bvalues);
		} else 
		{
			char *mapped_type = NULL;
			/* Check if this mod has its attribute type mapped */
			windows_map_attr_name(attr_type,1,is_user,0,&mapped_type, &mapdn);
			if (mapped_type)
			{
				/* If so copy over the mod with new type name */
				if (mapdn)
				{
					Slapi_ValueSet *mapped_values = NULL;
					Slapi_ValueSet *vs = NULL;
					Slapi_Mod smod;
                        
					vs = slapi_valueset_new();
					slapi_mod_init_byref(&smod,mod);
					slapi_valueset_set_from_smod(vs, &smod);
					map_dn_values(prp,vs,&mapped_values, 1 /* to windows */,0);
					if (mapped_values) 
					{
						slapi_mods_add_mod_values(&mapped_smods,mod->mod_op,mapped_type,valueset_get_valuearray(mapped_values));
						slapi_valueset_free(mapped_values);
						mapped_values = NULL;
					} else 
					{
						/* this might be a del: mod, in which case there are no values */
						if (mod->mod_op & LDAP_MOD_DELETE)
						{
							slapi_mods_add_mod_values(&mapped_smods, LDAP_MOD_DELETE, mapped_type, NULL);
						}
					}
					slapi_mod_done(&smod);
					slapi_valueset_free(vs);
				} else 
				{
					/* AD treats streetAddress as a single-valued attribute, while we define it
					 * as a multi-valued attribute as it's defined in rfc 4519.  We only
					 * sync the first value to AD to avoid a constraint violation.
					 */
					if (0 == slapi_attr_type_cmp(mapped_type, "streetAddress", SLAPI_TYPE_CMP_SUBTYPE)) {
						Slapi_Mod smod;

						slapi_mod_init_byref(&smod,mod);

						/* Check if there is more than one value */
						if (slapi_mod_get_num_values(&smod) > 1) {
							slapi_mod_get_first_value(&smod);
							/* Remove all values except for the first */
							while (slapi_mod_get_next_value(&smod)) {
								/* This modifies the bvalues in the mod itself */
								slapi_mod_remove_value(&smod);
							}
						}

						slapi_mod_done(&smod);
					}

					slapi_mods_add_modbvps(&mapped_smods,mod->mod_op,mapped_type,mod->mod_bvalues);
				}
				slapi_ch_free_string(&mapped_type);
			} else 
			{
				/* password mods are treated specially */
				if (0 == slapi_attr_type_cmp(attr_type, PSEUDO_ATTR_UNHASHEDUSERPASSWORD, SLAPI_TYPE_CMP_SUBTYPE) )
				{
					char *password_value = NULL;
					password_value = mod->mod_bvalues[0]->bv_val;
					/* We need to check if the first character of password_value is an 
					 * opening brace since strstr will simply return it's first argument
					 * if it is an empty string. */
					if (password_value && (*password_value == '{')) {
						if (strchr( password_value, '}' )) {
							/* A storage scheme is present.  Check if it's the
							 * clear storage scheme. */
							if ((strlen(password_value) >= PASSWD_CLEAR_PREFIX_LEN + 1) &&
							     (strncasecmp(password_value, PASSWD_CLEAR_PREFIX, PASSWD_CLEAR_PREFIX_LEN) == 0)) {
								/* This password is in clear text.  Strip off the clear prefix
								 * and sync it. */
								*password = slapi_ch_strdup(password_value + PASSWD_CLEAR_PREFIX_LEN);
							} else {
								/* This password is stored in a non-cleartext format.
								 * We can only sync cleartext passwords. */
								slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
									"%s: windows_create_remote_entry: "
									"Password is already hashed.  Not syncing.\n",
									agmt_get_long_name(prp->agmt));
							}
						} else {
							/* This password doesn't have a storage prefix but
							 * just happens to start with the '{' character.  We'll
							 * assume that it's just a cleartext password without
							 * the proper storage prefix. */
							*password = slapi_ch_strdup(password_value);
						}
					} else {
						/* This password has no storage prefix, or the password is empty */
						*password = slapi_ch_strdup(password_value);
					}
				}
			}
		}
		/* Otherwise we do not copy this mod at all */
		mod = slapi_mods_get_next_mod(&smods);
	}
	slapi_mods_done (&smods);
	/* Extract the mods for the caller */
	*returned_mods = slapi_mods_get_ldapmods_passout(&mapped_smods);
	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_map_mods_for_replay\n", 0, 0, 0 );
}


/* Returns non-zero if the attribute value sets are identical. If you want to
 * compare the entire attribute value, set n to 0.  You can compare only the
 * first n characters of the values by passing in the legth as n. */
static int
attr_compare_equal(Slapi_Attr *a, Slapi_Attr *b, int n)
{
	/* For now only handle single values */
	Slapi_Value *va = NULL;
	Slapi_Value *vb = NULL;
	int num_a = 0;
	int num_b = 0;
	int match = 1;

	slapi_attr_get_numvalues(a,&num_a);
	slapi_attr_get_numvalues(b,&num_b);

	if (num_a == num_b) {
		slapi_attr_first_value(a, &va);
		slapi_attr_first_value(b, &vb);

		/* If either val is less than n, then check if the length, then values are
		 * equal.  If both are n or greater, then only compare the first n chars. 
		 * If n is 0, then just compare the entire attribute. */
		if ((va->bv.bv_len < n) || (vb->bv.bv_len < n) || (n == 0)) {
			if (va->bv.bv_len == vb->bv.bv_len) {
				if (0 != memcmp(va->bv.bv_val, vb->bv.bv_val, va->bv.bv_len)) {
					match = 0;
				}
			} else {
				match = 0;
			}
		} else if (0 != memcmp(va->bv.bv_val, vb->bv.bv_val, n)) {
			match = 0;
		}
	} else {
		match = 0;
	}
	return match;
}

/* Returns non-zero if all of the values of attribute a are contained in attribute b. */
static int
attr_compare_present(Slapi_Attr *a, Slapi_Attr *b)
{
	int match = 1;
	int i = 0;
	Slapi_Value *va = NULL;

	/* Iterate through values in attr a and search for each in attr b */
	for (i = slapi_attr_first_value(a, &va); va && (i != -1);
	     i = slapi_attr_next_value(a, i, &va)) {
		if (slapi_attr_value_find(b, slapi_value_get_berval(va)) != 0) {
			/* This value wasn't found, so stop checking for values */
			match = 0;
			break;
		}
	}

	return match;
}


/* Helper functions for dirsync result processing */

/* Is this entry a tombstone ? */
static int 
is_tombstone(Private_Repl_Protocol *prp, Slapi_Entry *e)
{
	int retval = 0;

	if ( (slapi_filter_test_simple( e, (Slapi_Filter*)windows_private_get_deleted_filter(prp->agmt) ) == 0) )
	{
		retval = 1;
	}

	return retval;
}

#define ENTRY_NOTFOUND -1
#define ENTRY_NOT_UNIQUE -2

/* Search for an entry in AD */
static int
find_entry_by_attr_value_remote(const char *attribute, const char *value, Slapi_Entry **e,  Private_Repl_Protocol *prp)
{
	int retval = 0;
	ConnResult cres = 0;
	char *filter = NULL;
	const char *searchbase = NULL;
	Slapi_Entry *found_entry = NULL;

	filter = PR_smprintf("(%s=%s)",attribute,value);
	searchbase = slapi_sdn_get_dn(windows_private_get_windows_subtree(prp->agmt));
	cres = windows_search_entry(prp->conn, (char*)searchbase, filter, &found_entry);
	if (cres)
	{
		retval = -1;
	} else
		{
		if (found_entry)
		{
			*e = found_entry;
		}
	}
	if (filter)
	{
		PR_smprintf_free(filter);
		filter = NULL;
	}
	return retval;
}

/* Search for an entry in AD by DN */
static int
windows_get_remote_entry (Private_Repl_Protocol *prp, const Slapi_DN* remote_dn,Slapi_Entry **remote_entry)
{
	int retval = 0;
	ConnResult cres = 0;
	char *filter = "(objectclass=*)";
	const char *searchbase = NULL;
	Slapi_Entry *found_entry = NULL;

	searchbase = slapi_sdn_get_dn(remote_dn);
	cres = windows_search_entry(prp->conn, (char*)searchbase, filter, &found_entry);
	if (cres)
	{
		retval = -1;
	} else
	{
		if (found_entry)
		{
			*remote_entry = found_entry;
		}
	}
	return retval;
}

/* Search for a tombstone entry in AD by DN */
static int
windows_get_remote_tombstone (Private_Repl_Protocol *prp, const Slapi_DN* remote_dn,Slapi_Entry **remote_entry)
{
	int retval = 0;
	ConnResult cres = 0;
	char *filter = "(objectclass=*)";
	const char *searchbase = NULL;
	Slapi_Entry *found_entry = NULL;
	LDAPControl *server_controls[2];

	/* We need to send the "Return Deleted Objects" control to search
	 * for tombstones. */
	slapi_build_control(REPL_RETURN_DELETED_OBJS_CONTROL_OID, NULL, PR_TRUE,
			&server_controls[0]);
	server_controls[1] = NULL;

	searchbase = slapi_sdn_get_dn(remote_dn);
	cres = windows_search_entry_ext(prp->conn, (char*)searchbase, filter,
				&found_entry, server_controls);
	if (cres) {
		retval = -1;
	} else {
		if (found_entry) {
			*remote_entry = found_entry;
		}
	}

	ldap_control_free(server_controls[0]);
	return retval;
}

/* Reanimate a tombstone in AD.  Returns 0 on success, otherwise you get the
 * LDAP return code from the modify operation.  */
static int
windows_reanimate_tombstone(Private_Repl_Protocol *prp, const Slapi_DN* tombstone_dn, const char* new_dn)
{
	int retval = 0;
	LDAPControl *server_controls[2];
	Slapi_Mods smods = {0};

	/* We need to send the "Return Deleted Objects" control to modify
	 * tombstone entries. */
	slapi_build_control(REPL_RETURN_DELETED_OBJS_CONTROL_OID, NULL, PR_TRUE,
			&server_controls[0]);
	server_controls[1] = NULL;

	/* To reanimate a tombstone in AD, you need to send a modify
	 * operation that does two things.  It must remove the isDeleted
	 * attribute from the entry and it must modify the DN.  This DN
	 * does not have to be the same place in the tree that the entry
	 * previously existed. */ 
	slapi_mods_init (&smods, 0);
	slapi_mods_add_mod_values(&smods, LDAP_MOD_DELETE, "isDeleted", NULL);
	slapi_mods_add_string(&smods, LDAP_MOD_REPLACE, "distinguishedName", new_dn);

	retval = windows_conn_send_modify(prp->conn, slapi_sdn_get_dn(tombstone_dn),
				 slapi_mods_get_ldapmods_byref(&smods), server_controls, NULL );

	slapi_mods_done(&smods);
	ldap_control_free(server_controls[0]);
	return retval;
}

static int
find_entry_by_attr_value(const char *attribute, const char *value, Slapi_Entry **e,  const Repl_Agmt *ra)
{
    Slapi_PBlock *pb = slapi_pblock_new();
    Slapi_Entry **entries = NULL, **ep = NULL;
	Slapi_Entry *entry_found = NULL;
    char *query = NULL;
	int found_or_not = ENTRY_NOTFOUND;
	int rval = 0;
	const char *subtree_dn = NULL;
	int not_unique = 0;
	char *subtree_dn_copy = NULL;
	int scope = LDAP_SCOPE_SUBTREE;
	char **attrs = NULL;
	LDAPControl **server_controls = NULL;

    if (pb == NULL)
        goto done;

    query = slapi_ch_smprintf("(%s=%s)", attribute, value);

    if (query == NULL)
		goto done;

	subtree_dn = slapi_sdn_get_dn(windows_private_get_directory_subtree(ra));
	subtree_dn_copy = slapi_ch_strdup(subtree_dn);

    winsync_plugin_call_pre_ds_search_entry_cb(ra, NULL, &subtree_dn_copy, &scope, &query,
                                               &attrs, &server_controls);

    slapi_search_internal_set_pb(pb, subtree_dn_copy,
        scope, query, attrs, 0, server_controls, NULL,
        (void *)plugin_get_default_component_id(), 0);
    slapi_search_internal_pb(pb);
    slapi_ch_free_string(&subtree_dn_copy);
    slapi_ch_free_string(&query);
    slapi_ch_array_free(attrs);
    attrs = NULL;
    ldap_controls_free(server_controls);
    server_controls = NULL;

    slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_RESULT, &rval);
    if (rval != LDAP_SUCCESS)
	{
		goto done;
	}

    slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_SEARCH_ENTRIES, &entries);
    if ((entries == NULL) || (entries[0] == NULL))
	{
		goto done;
	}
	entry_found = entries[0];
	for (ep = entries; *ep; ep++) {
		if (not_unique)
		{
			found_or_not = ENTRY_NOT_UNIQUE;
		}
		not_unique = 1;
	}
done:
	if (entry_found && (found_or_not != ENTRY_NOT_UNIQUE))
	{
		found_or_not = 0;
		*e = slapi_entry_dup(entry_found);
	}
	if (pb)
	{
		slapi_free_search_results_internal(pb);
		slapi_pblock_destroy(pb);
	}
	return found_or_not;
}

static int
find_entry_by_username(const char *username, Slapi_Entry **e, const Repl_Agmt *ra)
{
		return find_entry_by_attr_value("ntUserDomainId",username,e,ra);
}

/* Find an entry in the local server given its GUID, or return ENTRY_NOTFOUND */
static int
find_entry_by_guid(const char *guid, Slapi_Entry **e, const Repl_Agmt *ra)
{
		return find_entry_by_attr_value("ntUniqueId",guid,e,ra);
}

/* Remove dashes from a GUID string. */
static void
dedash_guid(char *str)
{
	char *p = str;
	char c = '\0';

	while ((c = *p))
	{
		if ('-' == c)
		{
			/* Move on down please */
			char *q = p;
			char *r = q + 1;
			while (*r) 
			{
				*q++ = *r++;
			}
			*q = '\0';
		} 
		p++;
	}
}

/* Add dashes into a GUID string.  If the guid is not formatted properly,
 * we will free it and set the pointer to NULL. */
static void
dash_guid(char **str)
{
	if (strlen(*str) == NTUNIQUEID_LENGTH) {
		char *p = NULL;
		/* Add extra room for the dashes */
		*str = slapi_ch_realloc(*str, AD_GUID_LENGTH + 1);

		/* GUID needs to be in 8-4-4-4-12 format */
		p = *str + 23;
		memmove(p + 1, *str + 20, 12);
		*p = '-';
		p = *str + 18;
		memmove(p + 1, *str + 16, 4);
		*p = '-';
		p = *str + 13;
		memmove(p + 1, *str + 12, 4);
		*p = '-';
		p = *str + 8;
		memmove(p + 1, *str + 8, 4);
		*p = '-';
		p = *str + 36;
		*p = '\0';
	} else {
		/* This GUID does not appear to be valid */
		slapi_ch_free_string(str);
	}
}

/* For reasons not clear, the GUID returned in the tombstone DN is all 
 * messed up, like the guy in the movie 'the fly' after he want in the tranporter device */
static void
decrypt_guid(char *guid)
{
	static int decrypt_offsets[] = {6,7,4,5,2,3,0,1,10,11,8,9,14,15,12,13,16,17,18,19,
		20,21,22,23,24,25,26,27,28,29,30,31};

	char *p = guid;
	int i = 0;
	char *cpy = slapi_ch_strdup(guid);

	while (*p && i < (sizeof(decrypt_offsets)/sizeof(int)))
	{
		*p = cpy[decrypt_offsets[i]];
		p++;
		i++;
	}
	slapi_ch_free_string(&cpy);
}

static char*
extract_guid_from_tombstone_dn(const char *dn)
{
	char *guid = NULL;
	char *colon_offset = NULL;
	char *comma_offset = NULL;

	/* example DN of tombstone: 
		"CN=WDel Userdb1\\\nDEL:551706bc-ecf2-4b38-9284-9a8554171d69,CN=Deleted Objects,DC=magpie,DC=com" */

	/* First find the 'DEL:' */
	colon_offset = strchr(dn,':');
	/* Then scan forward to the next ',' */
	comma_offset = strchr(dn,',');
	/* The characters inbetween are the GUID, copy them to a new string and return to the caller */
	if (comma_offset && colon_offset && comma_offset > colon_offset) {
		guid = slapi_ch_malloc(comma_offset - colon_offset);
		strncpy(guid,colon_offset+1,(comma_offset-colon_offset)-1);
		guid[comma_offset-colon_offset-1] = '\0';
		/* Finally remove the dashes since we don't store them on our side */
		dedash_guid(guid);
		decrypt_guid(guid);
	}
	return guid;
}

static char *
convert_to_hex(Slapi_Value *val)
{
	int offset = 0;
	const struct berval *bvp = NULL;
	int length = 0;
	char *result = NULL;

	bvp = slapi_value_get_berval(val);
	if (bvp)
	{
		char *new_buffer = NULL;
		length = bvp->bv_len;

		for (offset = 0; offset < length; offset++) 
		{
			unsigned char byte = ((unsigned char*)(bvp->bv_val))[offset];
			new_buffer = PR_sprintf_append(new_buffer, "%02x", byte );
		}
		if (new_buffer)
		{
			result = new_buffer;
		}
	}
	return result;
}

/* Given a local entry, map it to it's AD tombstone DN. An AD
 * tombstone DN is formatted like:
 *
 *     cn=<cn>\0ADEL:<guid>,cn=Deleted Objects,<suffix>
 * 
 * This function will allocate a new Slapi_DN.  It is up to the
 * caller to free it when they are finished with it. */
static int 
map_windows_tombstone_dn(Slapi_Entry *e, Slapi_DN **dn, Private_Repl_Protocol *prp, int *exists)
{
	int rc = 0;
	char *cn = NULL;
	char *guid = NULL;
	const char *suffix = NULL;
	char *tombstone_dn = NULL;
	Slapi_Entry *tombstone = NULL;

	/* Initialize the output values */
	*dn = NULL;
	*exists = 0;

	cn = slapi_entry_attr_get_charptr(e,"cn");
	if (!cn) {
		cn = slapi_entry_attr_get_charptr(e,"ntuserdomainid");
	}

	guid = slapi_entry_attr_get_charptr(e,"ntUniqueId");
	if (guid) {
		/* the GUID is in a different form in the tombstone DN, so
		 * we need to transform it from the way we store it. */
		decrypt_guid(guid);
		dash_guid(&guid);
	}

	/* The tombstone suffix discards any containers, so we need
	 * to trim the DN to only dc components. */
	if ((suffix = slapi_sdn_get_dn(windows_private_get_windows_subtree(prp->agmt)))) {
		/* If this isn't found, it is treated as an error below. */
		suffix = (const char *) PL_strcasestr(suffix,"dc=");
	}

	if (cn && guid && suffix) {
		tombstone_dn = PR_smprintf("cn=%s\\0ADEL:%s,cn=Deleted Objects,%s",
				cn, guid, suffix);

		/* Hand off the memory to the Slapi_DN */
		*dn = slapi_sdn_new_dn_passin(tombstone_dn);

		windows_get_remote_tombstone(prp, *dn, &tombstone);
		if (tombstone) {
			*exists = 1;
			slapi_entry_free(tombstone);
		}
	} else {
		slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
			"%s: map_windows_tombstone_dn: Failed to map dn=\"%s\" "
			"to windows tombstone dn.\n", agmt_get_long_name(prp->agmt),
			slapi_entry_get_dn(e));
		rc = 1;
	}

	slapi_ch_free_string(&cn);
	slapi_ch_free_string(&guid);
	return rc;
}

static int is_guid_dn(Slapi_DN *remote_dn)
{
	if ((remote_dn != NULL) && (strncasecmp("<GUID=",
			slapi_sdn_get_dn(remote_dn), 6) == 0)) {
		return 1;
	} else {
		return 0;
	}
}

static char*
extract_guid_from_entry(Slapi_Entry *e, int is_nt4)
{
	char *guid = NULL;
	Slapi_Value *val = NULL;
	Slapi_Attr *attr = NULL;
    
	slapi_entry_attr_find(e, "objectGUID", &attr);
	if (attr)
	{
		slapi_attr_first_value(attr, &val);
		if (val) {
			if (is_nt4)
			{
				guid = slapi_ch_strdup(slapi_value_get_string(val));
			} else
			{
				guid = convert_to_hex(val);
			}
		}
	}
	return guid;
}

#ifdef FOR_DEBUGGING
static void
extract_guid_from_entry_bv(Slapi_Entry *e, const struct berval **bv)
{
	Slapi_Value *val = NULL;
	Slapi_Attr *attr = NULL;
    
	slapi_entry_attr_find(e, "objectGUID", &attr);
	if (attr)
	{
		slapi_attr_first_value(attr, &val);
		if (val) {
			*bv = slapi_value_get_berval(val);
		}
	}
}
#endif

static char*
extract_username_from_entry(Slapi_Entry *e)
{
	char *uid = NULL;
	uid = slapi_entry_attr_get_charptr(e,"samAccountName");
	return uid;
}

static char*
extract_ntuserdomainid_from_entry(Slapi_Entry *e)
{
	char *uid = NULL;
	uid = slapi_entry_attr_get_charptr(e,"ntuserdomainid");
	return uid;
}

static Slapi_DN *make_dn_from_guid(char *guid, int is_nt4, const char* suffix)
{
	Slapi_DN *new_dn = NULL;
	char *dn_string = NULL;
	if (guid)
	{
		if (is_nt4)
		{
			dn_string = PR_smprintf("GUID=%s,%s",guid,suffix);
		} else
		{
			dn_string = PR_smprintf("<GUID=%s>",guid);
		}
		new_dn = slapi_sdn_new_dn_byval(dn_string);
		PR_smprintf_free(dn_string);
	}
	/* dn string is now inside the Slapi_DN, and will be freed by its owner */
	return new_dn;
}

static char*
extract_container(const Slapi_DN *entry_dn, const Slapi_DN *suffix_dn)
{
	char *result = NULL;
	/* First do a scope test to make sure that we weren't passed bogus arguments */
	if (slapi_sdn_scope_test(entry_dn,suffix_dn,LDAP_SCOPE_SUBTREE))
	{
		Slapi_DN parent;
		slapi_sdn_init(&parent);

		/* Find the portion of the entry_dn between the RDN and the suffix */
		/* Start with the parent of the entry DN */
		slapi_sdn_get_parent(entry_dn, &parent);
		/* Iterate finding the parent again until we have the suffix */
		while (0 != slapi_sdn_compare(&parent,suffix_dn))
		{
			Slapi_DN child;
			Slapi_RDN *rdn = slapi_rdn_new();
			char *rdn_type = NULL;
			char *rdn_str = NULL;
			/* Append the current RDN to the new container string */
			slapi_sdn_get_rdn(&parent,rdn);
			slapi_rdn_get_first(rdn, &rdn_type, &rdn_str);
			if (rdn_str)
			{
				result = PR_sprintf_append(result, "%s=%s,", rdn_type,rdn_str );	
			}
			/* Don't free this until _after_ we've used the rdn_str */
			slapi_rdn_free(&rdn);
			/* Move to the next successive parent */
			slapi_sdn_init(&child);
			slapi_sdn_copy(&parent,&child);
			slapi_sdn_done(&parent);
			slapi_sdn_get_parent(&child, &parent);
			slapi_sdn_done(&child);
		}
		slapi_sdn_done(&parent);
	} 
	/* Always return something */
	if (NULL == result)
	{
		result = slapi_ch_strdup("");
	}
	return result;
}

/* Given a non-tombstone entry, return the DN of its peer in AD (whether present or not) */
static int 
map_entry_dn_outbound(Slapi_Entry *e, Slapi_DN **dn, Private_Repl_Protocol *prp, int *missing_entry, int guid_form)
{
	int retval = 0;
	char *guid = NULL;
	Slapi_DN *new_dn = NULL;
	int is_nt4 = windows_private_get_isnt4(prp->agmt);
	const char *suffix = slapi_sdn_get_dn(windows_private_get_windows_subtree(prp->agmt));
	/* To find the DN of the peer entry we first look for an ntUniqueId attribute
	 * on the local entry. If that's present, we generate a GUID-form DN.
	 * If there's no GUID, then we look for an ntUserDomainId attribute
	 * on the entry. If that's present we attempt to search for an entry with
	 * that samaccountName attribute value in AD. If we don't find any matching
	 * entry we generate a new DN using the entry's cn. If later, we find that
	 * this entry already exists, we handle that problem at the time. We don't
	 * check here. Note: for NT4 we always use ntUserDomainId for the samaccountname rdn, never cn.
	 */
	
	*missing_entry = 0;

	guid = slapi_entry_attr_get_charptr(e,"ntUniqueId");
	if (guid && guid_form) 
	{
		int rc = 0;
		Slapi_Entry *remote_entry = NULL;
		new_dn = make_dn_from_guid(guid, is_nt4, suffix);
		slapi_ch_free_string(&guid);
		/* There are certain cases where we will have a GUID, but the entry does not exist in
		 * AD.  This happens when you delete an entry, then add it back elsewhere in the tree
		 * without removing the ntUniqueID attribute.  We should verify that the entry really
		 * exists in AD. */
		rc = windows_get_remote_entry(prp, new_dn, &remote_entry);
		slapi_sdn_free(&new_dn);
		if (0 == rc && remote_entry) {
			slapi_entry_free(remote_entry);
		} else {
			/* We need to re-write the DN to a non-GUID DN if we're syncing to a
			 * Windows 2000 Server since tombstone reanimation is not supported.
			 * If we're syncing with Windows 2003 Server, we'll just use the GUID
			 * to reanimate the tombstone when processing the add operation. */
			*missing_entry = 1;
			if (!windows_private_get_iswin2k3(prp->agmt)) {
				char *new_dn_string = NULL;
				char *cn_string = NULL;

				/* We can't use a GUID DN, so rewrite to the mapped DN. */
				cn_string = slapi_entry_attr_get_charptr(e,"cn");
				if (!cn_string) {
					cn_string = slapi_entry_attr_get_charptr(e,"ntuserdomainid");
				}

				if (cn_string) {
					char *container_str = NULL;

					container_str = extract_container(slapi_entry_get_sdn_const(e),
						windows_private_get_directory_subtree(prp->agmt));
					new_dn_string = PR_smprintf("cn=%s,%s%s", cn_string, container_str, suffix);

					if (new_dn_string) {
						if (new_dn) {
							slapi_sdn_free(&new_dn);
						}
						new_dn = slapi_sdn_new_dn_byval(new_dn_string);
						PR_smprintf_free(new_dn_string);
					}

					slapi_ch_free_string(&cn_string);
					slapi_ch_free_string(&container_str);
                                 }
			}
		}
	} else 
	{
		/* No GUID found, try ntUserDomainId */
		Slapi_Entry *remote_entry = NULL;
		char *username = slapi_entry_attr_get_charptr(e,"ntUserDomainId");
		if (username) {
			retval = find_entry_by_attr_value_remote("samAccountName",username,&remote_entry,prp);
			if (0 == retval && remote_entry) 
			{
				/* Get the entry's DN */
				new_dn = slapi_sdn_new();
				slapi_sdn_copy(slapi_entry_get_sdn_const(remote_entry), new_dn);
			} else {
				if (0 == retval)
				{
					char *new_dn_string = NULL;
					char *cn_string = NULL;

					*missing_entry = 1;
					/* This means that we failed to find a peer entry */
					/* In that case we need to generate the DN that we want to use */
					/* Generated DN's take the form : 
						cn=<cn from local entry>, ... in the case that the local entry has a cn, OR
						cn=<ntuserdomainid attribute value>, ... in the case that the local entry doesn't have a CN
					 */
					if (is_nt4)
					{
						cn_string = slapi_entry_attr_get_charptr(e,"ntuserdomainid");
					} else
					{
						cn_string = slapi_entry_attr_get_charptr(e,"cn");
						if (!cn_string) 
						{
							cn_string = slapi_entry_attr_get_charptr(e,"ntuserdomainid");
						}
					}
					if (cn_string) 
					{
						char *rdnstr = NULL;
						char *container_str = NULL;
					
						container_str = extract_container(slapi_entry_get_sdn_const(e), windows_private_get_directory_subtree(prp->agmt));
						
						rdnstr = is_nt4 ? "samaccountname=%s,%s%s" : "cn=%s,%s%s";

						new_dn_string = PR_smprintf(rdnstr,cn_string,container_str,suffix);
						if (new_dn_string)
						{
							new_dn = slapi_sdn_new_dn_byval(new_dn_string);
							PR_smprintf_free(new_dn_string);
						}
						slapi_ch_free_string(&cn_string);
						slapi_ch_free_string(&container_str);
					}
				} else 
				{
					/* This means that we failed to talk to the AD for some reason, the operation should be re-tried */
					slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
					"%s: map_entry_dn_outbound: failed to fetch entry from AD: dn=\"%s\", err=%d\n",
					agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(slapi_entry_get_sdn_const(e)), retval);

					retval = -1;
				}
			}
			slapi_ch_free_string(&username);
		}
		if (remote_entry)
		{
			slapi_entry_free(remote_entry);
		}
	}
	if (new_dn) 
	{
		*dn = new_dn;
	}
	slapi_ch_free_string(&guid);
	return retval;
}

/* Given a tombstone entry, return the DN of its peer in this server (if present) */
static int 
map_tombstone_dn_inbound(Slapi_Entry *e, Slapi_DN **dn, const Repl_Agmt *ra)
{
	int retval = 0;
	Slapi_DN *new_dn = NULL;
	char *guid = NULL;
	const char *dn_string = NULL;
	Slapi_Entry *matching_entry = NULL;

	/* To map a tombstone's DN we need to first extract the entry's objectGUID from the DN
	 * CN=vpdxtAD_07\
		DEL:d4ca4e16-e35b-400d-834a-f02db600f3fa,CN=Deleted Objects,DC=magpie,DC=com
	 */
	*dn = NULL;

	dn_string = slapi_sdn_get_dn(slapi_entry_get_sdn_const(e)); /* This is a pointer from inside the sdn, no need to free */
	guid = extract_guid_from_tombstone_dn(dn_string);

	if (guid) 
	{
		retval = find_entry_by_guid(guid,&matching_entry,ra); 
		if (retval) 
		{
			if (ENTRY_NOTFOUND == retval) 
			{
			} else 
			{
				if (ENTRY_NOT_UNIQUE == retval) 
				{
				} else
				{
					/* A real error */
				}
			}
		} else 
		{
			/* We found the matching entry : get its DN */
			new_dn = slapi_sdn_dup(slapi_entry_get_sdn_const(matching_entry));
		}
	}

	if (new_dn) 
	{
		*dn = new_dn;
	}

	if (guid) 
	{
		slapi_ch_free_string(&guid);
	}
	if (matching_entry)
	{
		slapi_entry_free(matching_entry);
	}
	return retval;
}

/* Given a non-tombstone entry, return the DN of its peer in this server (whether present or not) */
static int 
map_entry_dn_inbound(Slapi_Entry *e, Slapi_DN **dn, const Repl_Agmt *ra)
{
	int retval = 0;
	Slapi_DN *new_dn = NULL;
	char *guid = NULL;
	char *username = NULL;
	Slapi_Entry *matching_entry = NULL;
	int is_user = 0;
	int is_group = 0;
	int is_nt4 = windows_private_get_isnt4(ra);

	/* To map a non-tombstone's DN we need to first try to look it up by GUID.
	 * If we do not find it, then we need to generate the DN that it would have if added as a new entry.
	 */
	*dn = NULL;

	windows_is_remote_entry_user_or_group(e,&is_user,&is_group);

	guid = extract_guid_from_entry(e, is_nt4);
	if (guid) 
	{
		retval = find_entry_by_guid(guid,&matching_entry,ra);
		if (retval) 
		{
			if (ENTRY_NOTFOUND == retval) 
			{
			} else 
			{
				if (ENTRY_NOT_UNIQUE == retval) 
				{
				} else
				{
					/* A real error */
					goto error;
				}
			}
		} else 
		{
			/* We found the matching entry : get its DN */
			new_dn = slapi_sdn_dup(slapi_entry_get_sdn_const(matching_entry));
		}
	}
	/* If we failed to lookup by guid, try samaccountname */
	if (NULL == new_dn) 
	{
		username = extract_username_from_entry(e);
		if (username) {
			retval = find_entry_by_username(username,&matching_entry,ra);
			if (retval) 
			{
				if (ENTRY_NOTFOUND == retval) 
				{
				} else 
				{
					if (ENTRY_NOT_UNIQUE == retval) 
					{
					} else
					{
						/* A real error */
						goto error;
					}
				}
			} else 
			{
				/* We found the matching entry : get its DN */
				new_dn = slapi_sdn_dup(slapi_entry_get_sdn_const(matching_entry));
			}
		}
	}
	/* If we couldn't find a matching entry by either method, then we need to invent a new DN */
	if (NULL == new_dn) 
	{
		/* The new DN has the form: uid=<samaccountname>,<sync'ed subtree> */
		/* If an entry with this DN already exists, we fail and return no DN 
		 * this is because we don't want to second-guess what the admin wants here:
		 * they may want to associate this existing entry with the peer AD entry, 
		 * but if they intend that we say they must add the ntDomainUserId attribute to
		 * that entry.
		 */
		char *new_dn_string = NULL;
		if (username) 
		{
			const char *suffix = slapi_sdn_get_dn(windows_private_get_directory_subtree(ra));
			char *container_str = NULL;

			container_str = extract_container(slapi_entry_get_sdn_const(e), windows_private_get_windows_subtree(ra));
			/* Local DNs for users and groups are different */
			if (is_user)
			{
				new_dn_string = PR_smprintf("uid=%s,%s%s",username,container_str,suffix);
				winsync_plugin_call_get_new_ds_user_dn_cb(ra,
														  windows_private_get_raw_entry(ra),
														  e,
														  &new_dn_string,
														  windows_private_get_directory_subtree(ra),
														  windows_private_get_windows_subtree(ra));
			} else
			{
				new_dn_string = PR_smprintf("cn=%s,%s%s",username,container_str,suffix);
				if (is_group) {
					winsync_plugin_call_get_new_ds_group_dn_cb(ra,
															   windows_private_get_raw_entry(ra),
															   e,
															   &new_dn_string,
															   windows_private_get_directory_subtree(ra),
															   windows_private_get_windows_subtree(ra));
				}
			}
			new_dn = slapi_sdn_new_dn_byval(new_dn_string);
			PR_smprintf_free(new_dn_string);
			slapi_ch_free_string(&container_str);
			/* Clear any earlier error */
			retval = 0;
		} else 
		{
			/* Error, no username */
		}
	}
	if (new_dn) 
	{
		*dn = new_dn;
	}
error: 
	if (guid) 
	{
		PR_smprintf_free(guid);
	}
	if (matching_entry)
	{
		slapi_entry_free(matching_entry);
	}
	if (username)
	{
		slapi_ch_free_string(&username);
	}
	return retval;
}

/* Tests if the entry is subject to our agreement (i.e. is it in the sync'ed subtree in this server, and is it the right objectclass
 * and does it have the right attribute values for sync ?) 
 */
static int 
is_subject_of_agreement_local(const Slapi_Entry *local_entry, const Repl_Agmt *ra)
{
	int retval = 0;
	int is_in_subtree = 0;
	const Slapi_DN *agreement_subtree = NULL;
	
	/* First test for the sync'ed subtree */
	agreement_subtree = windows_private_get_directory_subtree(ra);
	if (NULL == agreement_subtree)
	{
		goto error;
	}
	is_in_subtree = slapi_sdn_scope_test(slapi_entry_get_sdn_const(local_entry), agreement_subtree, LDAP_SCOPE_SUBTREE);
	if (is_in_subtree) 
	{
		/* Next test for the correct kind of entry */
		if (local_entry) {
			if (slapi_filter_test_simple( (Slapi_Entry*)local_entry,
					(Slapi_Filter*)windows_private_get_directory_filter(ra)) == 0)
			{
				retval = 1;
			}
		} else 
		{
			/* Error: couldn't find the entry */
			slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
				"failed to find entry in is_subject_of_agreement_local: %d\n", retval);
			retval = 0;
		}
	}
error:
	return retval;
}

/* Tests if the entry is subject to our agreement (i.e. is it in the sync'ed subtree in AD and either a user or a group ?) */
static int 
is_subject_of_agreement_remote(Slapi_Entry *e, const Repl_Agmt *ra)
{
	int retval = 0;
	int is_in_subtree = 0;
	const Slapi_DN *agreement_subtree = NULL;
	
	/* First test for the sync'ed subtree */
	agreement_subtree = windows_private_get_windows_subtree(ra);
	if (NULL == agreement_subtree) 
	{
		goto error;
	}
	is_in_subtree = slapi_sdn_scope_test(slapi_entry_get_sdn_const(e), agreement_subtree, LDAP_SCOPE_SUBTREE);
	if (is_in_subtree) 
	{
		retval = 1;
	}
error:
	return retval;
}

static int
windows_create_local_entry(Private_Repl_Protocol *prp,Slapi_Entry *remote_entry,const Slapi_DN* local_sdn)
{
	int retval = 0;
	char *entry_string = NULL;
	Slapi_Entry *local_entry = NULL;
	Slapi_PBlock* pb = NULL;
	int is_user = 0; 
	int is_group = 0;
	char *local_entry_template = NULL;
	char *user_entry_template = NULL;
	char *username = extract_username_from_entry(remote_entry);
	Slapi_Attr *attr = NULL;
	int rc = 0;
	char *guid_str = NULL;
	int is_nt4 = windows_private_get_isnt4(prp->agmt);

	char *local_user_entry_template = 
		"dn: %s\n"
		"objectclass:top\n"
   		"objectclass:person\n"
   		"objectclass:organizationalperson\n"
   		"objectclass:inetOrgPerson\n"
   		"objectclass:ntUser\n"
		"ntUserDeleteAccount:true\n"
   		"uid:%s\n";

	char *local_nt4_user_entry_template = 
		"dn: %s\n"
		"objectclass:top\n"
   		"objectclass:person\n"
   		"objectclass:organizationalperson\n"
   		"objectclass:inetOrgPerson\n"
   		"objectclass:ntUser\n"
		"ntUserDeleteAccount:true\n"
   		"uid:%s\n";

	char *local_group_entry_template = 
		"dn: %s\n"
		"objectclass:top\n"
   		"objectclass:groupofuniquenames\n"
   		"objectclass:ntGroup\n"
		"ntGroupDeleteGroup:true\n"
   		"cn:%s\n";

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_create_local_entry\n", 0, 0, 0 );

	windows_is_remote_entry_user_or_group(remote_entry,&is_user,&is_group);
	user_entry_template = is_nt4 ? local_nt4_user_entry_template : local_user_entry_template;
	local_entry_template = is_user ? user_entry_template : local_group_entry_template;
	/* Create a new entry */
	/* Give it its DN and username */
	entry_string = slapi_ch_smprintf(local_entry_template,slapi_sdn_get_dn(local_sdn),username, username);
	if (NULL == entry_string) 
	{
		goto error;
	}
	local_entry = slapi_str2entry(entry_string, 0);
	slapi_ch_free_string(&entry_string);
	if (NULL == local_entry) 
	{
		goto error;
	}
	/* Map the appropriate attributes sourced from the remote entry */
    for (rc = slapi_entry_first_attr(remote_entry, &attr); rc == 0;
			rc = slapi_entry_next_attr(remote_entry, attr, &attr)) 
	{
		char *type = NULL;
		Slapi_ValueSet *vs = NULL;
		int mapdn = 0;

		slapi_attr_get_type( attr, &type );
		slapi_attr_get_valueset(attr,&vs);

		if ( is_straight_mapped_attr(type,is_user,is_nt4) )
		{
			/* copy over the attr values */
			slapi_entry_add_valueset(local_entry,type,vs);
		} else 
		{
			char *new_type = NULL;

			windows_map_attr_name(type , 0 /* from windows */, is_user, 1 /* create */, &new_type, &mapdn);
			if (new_type)
			{
				if (mapdn)
				{
					Slapi_ValueSet *mapped_values = NULL;
					map_dn_values(prp,vs,&mapped_values, 0 /* from windows */,0);
					if (mapped_values) 
					{
						slapi_entry_add_valueset(local_entry,new_type,mapped_values);
						slapi_valueset_free(mapped_values);
						mapped_values = NULL;
					}
				} else
				{
					slapi_entry_add_valueset(local_entry,new_type,vs);
				}
				slapi_ch_free_string(&new_type);
			}
		}
		if (vs) 
		{
			slapi_valueset_free(vs);
			vs = NULL;
		}
	}
	/* Copy over the GUID */
	guid_str = extract_guid_from_entry(remote_entry, is_nt4);
	if (guid_str) 
	{
		slapi_entry_add_string(local_entry,"ntUniqueId",guid_str);
	} else 
	{
		slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
			"extract_guid_from_entry entry %s failed to extract the guid\n", slapi_sdn_get_dn(local_sdn));
		/* Fatal error : need the guid */
		goto error;
	}
	/* Hack for NT4, which has no surname */
	if (is_nt4 && is_user)
	{
		slapi_entry_add_string(local_entry,"sn",username);
	}

	if (is_user) {
	    winsync_plugin_call_pre_ds_add_user_cb(prp->agmt,
						   windows_private_get_raw_entry(prp->agmt),
						   remote_entry,
						   local_entry);
	} else if (is_group) {
	    winsync_plugin_call_pre_ds_add_group_cb(prp->agmt,
							windows_private_get_raw_entry(prp->agmt),
						    remote_entry,
						    local_entry);
	}
	/* Store it */
	windows_dump_entry("Adding new local entry",local_entry);
	pb = slapi_pblock_new();
	slapi_add_entry_internal_set_pb(pb, local_entry, NULL,repl_get_plugin_identity(PLUGIN_MULTIMASTER_REPLICATION),0);  
	slapi_add_internal_pb(pb);
	slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_RESULT, &retval);

	if (retval) {
		slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
			"add operation of entry %s returned: %d\n", slapi_sdn_get_dn(local_sdn), retval);
	}
error:
	slapi_ch_free_string(&guid_str);
	if (pb)
	{
		slapi_pblock_destroy(pb);
	}
	if (username) 
	{
		slapi_ch_free_string(&username);
	}
	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_create_local_entry\n", 0, 0, 0 );
	return retval;
}

/* Function to generate the correct mods to bring 'local' attribute values into consistency with given 'remote' values */
/* 'local' and 'remote' in quotes because we actually use this function in both directions */
/* This function expects the value sets to have been already pruned to exclude values that are not
 * subject to the agreement and present in the peer. */
static int
windows_generate_dn_value_mods(char *local_type, const Slapi_Attr *attr, Slapi_Mods *smods, Slapi_ValueSet *remote_values, Slapi_ValueSet *local_values, int *do_modify)
{
	int ret = 0;
	int i = 0;
	Slapi_Value *rv = NULL;
	Slapi_Value *lv = NULL;
	/* We need to generate an ADD mod for each entry that is in the remote values but not in the local values */
	/* Iterate over the remote values */
	i = slapi_valueset_first_value(remote_values,&rv);
	while (NULL != rv)
	{
		const char *remote_dn = slapi_value_get_string(rv);
		int value_present_in_local_values = (NULL != slapi_valueset_find(attr, local_values, rv));
		if (!value_present_in_local_values)
		{
			slapi_mods_add_string(smods,LDAP_MOD_ADD,local_type,remote_dn);
			*do_modify = 1;
		}
		i = slapi_valueset_next_value(remote_values,i,&rv);
	}
	/* We need to generate a DEL mod for each entry that is in the local values but not in the remote values */
	/* Iterate over the local values */
	i = slapi_valueset_first_value(local_values,&lv);
	while (NULL != lv)
	{
		const char *local_dn = slapi_value_get_string(lv);
		int value_present_in_remote_values = (NULL != slapi_valueset_find(attr, remote_values, lv));
		if (!value_present_in_remote_values)
		{
			slapi_mods_add_string(smods,LDAP_MOD_DELETE,local_type,local_dn);
			*do_modify = 1;
		}
		i = slapi_valueset_next_value(local_values,i,&lv);
	}
	return ret;
}

/* Generate the mods for an update in either direction.  Be careful... the "remote" entry is the DS entry in the to_windows case, but the AD entry in the other case. */
static int
windows_generate_update_mods(Private_Repl_Protocol *prp,Slapi_Entry *remote_entry,Slapi_Entry *local_entry, int to_windows, Slapi_Mods *smods, int *do_modify)
{
	int retval = 0;
	Slapi_Attr *attr = NULL;
	Slapi_Attr *del_attr = NULL;
	int is_user = 0;
	int is_group = 0;
	int rc = 0;
	int is_nt4 = windows_private_get_isnt4(prp->agmt);
	/* Iterate over the attributes on the remote entry, updating the local entry where appropriate */
	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_generate_update_mods\n", 0, 0, 0 );

	*do_modify = 0;
	if (to_windows)
	{
		windows_is_local_entry_user_or_group(remote_entry,&is_user,&is_group);
	} else
	{
		windows_is_remote_entry_user_or_group(remote_entry,&is_user,&is_group);
	}

    for (rc = slapi_entry_first_attr(remote_entry, &attr); rc == 0;
			rc = slapi_entry_next_attr(remote_entry, attr, &attr)) 
	{
		int is_present_local = 0;
		char *type = NULL;
		Slapi_ValueSet *vs = NULL;
		char *local_type = NULL;
		Slapi_Attr *local_attr = NULL;
		int is_guid = 0;
		int mapdn = 0;


		slapi_attr_get_type( attr, &type );
		slapi_attr_get_valueset(attr,&vs);

		/* First determine what we will do with this attr */
		/* If it's a GUID, we need to take special action */
		if (0 == slapi_attr_type_cmp(type,"objectGuid",SLAPI_TYPE_CMP_SUBTYPE) && !to_windows) 
		{
			is_guid = 1;
			local_type = slapi_ch_strdup("ntUniqueId");
		} else 
		{
			if ( is_straight_mapped_attr(type,is_user,is_nt4) ) {
				local_type = slapi_ch_strdup(type);
			} else {
				windows_map_attr_name(type , to_windows, is_user, 0 /* not create */, &local_type, &mapdn);
			}
			is_guid = 0;
		}
		if (NULL == local_type)
		{
			/* Means we do not map this attribute */
			if (vs) 
			{
				slapi_valueset_free(vs);
				vs = NULL;
			}
			continue;
		}

		if (to_windows && (0 == slapi_attr_type_cmp(local_type, "streetAddress", SLAPI_TYPE_CMP_SUBTYPE))) {
			slapi_entry_attr_find(local_entry,FAKE_STREET_ATTR_NAME,&local_attr);
		} else {
			slapi_entry_attr_find(local_entry,local_type,&local_attr);
		}

		is_present_local = (NULL == local_attr) ? 0 : 1;
		/* Is the attribute present on the local entry ? */
		if (is_present_local && !is_guid)
		{
			if (!mapdn)
			{
				int values_equal = 0;
                                /* AD has a legth contraint on the initials attribute,
                                 * so treat is as a special case. */
				if (0 == slapi_attr_type_cmp(type, "initials", SLAPI_TYPE_CMP_SUBTYPE)) {
					values_equal = attr_compare_equal(attr, local_attr, AD_INITIALS_LENGTH);
				/* If we're getting a streetAddress (a fake attr name is used) from AD, then
				 * we just check if the value in AD is present in our entry in DS.  In this
				 * case, attr is from the AD entry, and local_attr is from the DS entry. */
				} else if (0 == slapi_attr_type_cmp(type, FAKE_STREET_ATTR_NAME, SLAPI_TYPE_CMP_SUBTYPE) && !to_windows) {
					values_equal = attr_compare_present(attr, local_attr);
				/* If we are checking if we should send a street attribute to AD, then
				 * we want to first see if the AD entry already contains any street value
				 * that is present in the DS entry.  In this case, attr is from the DS
				 * entry, and local_attr is from the AD entry. */ 
				} else if ((0 == slapi_attr_type_cmp(type, "street", SLAPI_TYPE_CMP_SUBTYPE) && to_windows)) {
					values_equal = attr_compare_present(local_attr, attr);
				} else {
					/* Compare the entire attribute values */
					values_equal = attr_compare_equal(attr, local_attr, 0);
				}

				/* If it is then we need to replace the local values with the remote values if they are different */
				if (!values_equal)
				{
					slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
					"windows_generate_update_mods: %s, %s : values are different\n",
					slapi_sdn_get_dn(slapi_entry_get_sdn_const(local_entry)), local_type);

					if ((0 == slapi_attr_type_cmp(local_type, "streetAddress",
						SLAPI_TYPE_CMP_SUBTYPE) && to_windows)) {
						/* streetAddress is single-valued in AD, so make
						 * sure we don't try to send more than one value. */
						if (slapi_valueset_count(vs) > 1) {
							int i = 0;
							Slapi_Value *value = NULL;
							Slapi_Value *new_value = NULL;

							i = slapi_valueset_first_value(vs,&value);
							if (i >= 0) {
								/* Dup the first value, trash the valueset, then copy
								 * in the dup'd value. */
								new_value = slapi_value_dup(value);
								slapi_valueset_done(vs);
								/* The below hands off the memory to the valueset */
								slapi_valueset_add_value_ext(vs, new_value, SLAPI_VALUE_FLAG_PASSIN);
							}
						}
					} else if ((0 == slapi_attr_type_cmp(local_type, "initials",
						SLAPI_TYPE_CMP_SUBTYPE) && to_windows)) {
						/* initials is constratined to a max length of
						 * 6 characters in AD, so trim the value if
						 * needed before sending. */
						int i = 0;
						const char *initials_value = NULL;
						Slapi_Value *value = NULL;

						i = slapi_valueset_first_value(vs,&value);
						while (i >= 0) {
							initials_value = slapi_value_get_string(value);

							/* If > AD_INITIALS_LENGTH, trim the value */
							if (strlen(initials_value) > AD_INITIALS_LENGTH) {
								char *new_initials = PL_strndup(initials_value, AD_INITIALS_LENGTH);
								/* the below hands off memory */
								slapi_value_set_string_passin(value, new_initials);
								slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
									"%s: windows_generate_update_mods: "
									"Trimming initials attribute to %d characters.\n",
									agmt_get_long_name(prp->agmt), AD_INITIALS_LENGTH);
							}

							i = slapi_valueset_next_value(vs, i, &value);
						}
					}
					slapi_mods_add_mod_values(smods,LDAP_MOD_REPLACE,
						local_type,valueset_get_valuearray(vs));
					*do_modify = 1;
				} else
				{
					slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
					"windows_generate_update_mods: %s, %s : values are equal\n", slapi_sdn_get_dn(slapi_entry_get_sdn_const(local_entry)), local_type);
				}
			} else {
				/* A dn-valued attribute : need to take special steps */
				Slapi_ValueSet *mapped_remote_values = NULL;
				/* First map all the DNs to that they're in a consistent domain */
				map_dn_values(prp,vs,&mapped_remote_values, to_windows,0);
				if (mapped_remote_values) 
				{
					Slapi_ValueSet *local_values = NULL;
					Slapi_ValueSet *restricted_local_values = NULL;
					/* Now do a compare on the values, generating mods to bring them into consistency (if any) */
					/* We ignore any DNs that are outside the scope of the agreement (on both sides) */
					slapi_attr_get_valueset(local_attr,&local_values);
					map_dn_values(prp,local_values,&restricted_local_values,!to_windows,1);
					if (restricted_local_values)
					{
						windows_generate_dn_value_mods(local_type,local_attr,smods,mapped_remote_values,restricted_local_values,do_modify);
						slapi_valueset_free(restricted_local_values);
						restricted_local_values = NULL;
					}
					slapi_valueset_free(mapped_remote_values);
					mapped_remote_values = NULL;
					if (local_values) 
					{
						slapi_valueset_free(local_values);
						local_values = NULL;
					}
				}
			}
		} else
		{
			if (!is_present_local)
			{
				slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
					"windows_generate_update_mods: %s, %s : values not present on peer entry\n", slapi_sdn_get_dn(slapi_entry_get_sdn_const(local_entry)), local_type);
				/* If it is currently absent, then we add the value from the remote entry */
				if (is_guid)
				{
					/* Translate the guid value */
					char *guid = extract_guid_from_entry(remote_entry, is_nt4);
					if (guid)
					{
						slapi_mods_add_string(smods,LDAP_MOD_ADD,local_type,guid);
						slapi_ch_free_string(&guid);
					}
				} else
				{
					/* Handle DN valued attributes here */
					if (mapdn)
					{
						Slapi_ValueSet *mapped_values = NULL;
						map_dn_values(prp,vs,&mapped_values, to_windows,0);
						if (mapped_values) 
						{
							slapi_mods_add_mod_values(smods,LDAP_MOD_ADD,local_type,valueset_get_valuearray(mapped_values));
							slapi_valueset_free(mapped_values);
							mapped_values = NULL;
						}
					} else
					{
						if ((0 == slapi_attr_type_cmp(local_type, "streetAddress",
							SLAPI_TYPE_CMP_SUBTYPE) && to_windows)) {
							/* streetAddress is single-valued in AD, so make
							 * sure we don't try to send more than one value. */
							if (slapi_valueset_count(vs) > 1) {
								int i = 0;
								Slapi_Value *value = NULL;
								Slapi_Value *new_value = NULL;

								i = slapi_valueset_first_value(vs,&value);
								if (i >= 0) {
									/* Dup the first value, trash the valueset, then copy
									 * in the dup'd value. */
									new_value = slapi_value_dup(value);
									slapi_valueset_done(vs);
									/* The below hands off the memory to the valueset */
									slapi_valueset_add_value_ext(vs, new_value, SLAPI_VALUE_FLAG_PASSIN);
								}
							}
						} else if ((0 == slapi_attr_type_cmp(local_type, "initials",
							SLAPI_TYPE_CMP_SUBTYPE) && to_windows)) {
							/* initials is constratined to a max length of
							 * 6 characters in AD, so trim the value if
							 * needed before sending. */
							int i = 0;
							const char *initials_value = NULL;
							Slapi_Value *value = NULL;

							i = slapi_valueset_first_value(vs,&value);
							while (i >= 0) {
								initials_value = slapi_value_get_string(value);

								/* If > AD_INITIALS_LENGTH, trim the value */
								if (strlen(initials_value) > AD_INITIALS_LENGTH) {
									char *new_initials = PL_strndup(initials_value, AD_INITIALS_LENGTH);
									/* the below hands off memory */
									slapi_value_set_string_passin(value, new_initials);
									slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
										"%s: windows_generate_update_mods: "
										"Trimming initials attribute to %d characters.\n",
                                                                        agmt_get_long_name(prp->agmt), AD_INITIALS_LENGTH);
								}

								i = slapi_valueset_next_value(vs, i, &value);
							}
						}
						slapi_mods_add_mod_values(smods,LDAP_MOD_ADD,local_type,valueset_get_valuearray(vs));
					}
				}
				*do_modify = 1;
			}
		}

		if (vs) 
		{
			slapi_valueset_free(vs);
			vs = NULL;
		}

		slapi_ch_free_string(&local_type);
	}

        /* Check if any attributes were deleted from the remote entry */
        entry_first_deleted_attribute(remote_entry, &del_attr);
        while (del_attr != NULL) {
                Slapi_Attr *local_attr = NULL;
                char *type = NULL;
                char *local_type = NULL;
                int mapdn = 0;

                /* Map remote type to local type */
		slapi_attr_get_type(del_attr, &type);
                if ( is_straight_mapped_attr(type,is_user,is_nt4) ) {
                        local_type = slapi_ch_strdup(type);
                } else {
                        windows_map_attr_name(type , to_windows, is_user, 0 /* not create */, &local_type, &mapdn);
                }

                /* Check if this attr exists in the local entry */
                if (local_type) {
                        slapi_entry_attr_find(local_entry, local_type, &local_attr);
                        if (local_attr) {
                                slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
                                        "windows_generate_update_mods: deleting %s attribute from local entry\n", local_type);
                                /* Delete this attr from the local entry */
                                slapi_mods_add_mod_values(smods, LDAP_MOD_DELETE, local_type, NULL);
				*do_modify = 1;
                        }
                }

                entry_next_deleted_attribute(remote_entry, &del_attr);
		slapi_ch_free_string(&local_type);
        }

	if (to_windows) {
	    if (is_user) {
		winsync_plugin_call_pre_ad_mod_user_cb(prp->agmt,
						       windows_private_get_raw_entry(prp->agmt),
						       local_entry, /* the cooked ad entry */
						       remote_entry, /* the ds entry */
						       smods,
						       do_modify);
	    } else if (is_group) {
		winsync_plugin_call_pre_ad_mod_group_cb(prp->agmt,
							windows_private_get_raw_entry(prp->agmt),
							local_entry, /* the cooked ad entry */
							remote_entry, /* the ds entry */
							smods,
							do_modify);
	    }
	} else {
	    if (is_user) {
		winsync_plugin_call_pre_ds_mod_user_cb(prp->agmt,
						       windows_private_get_raw_entry(prp->agmt),
						       remote_entry, /* the cooked ad entry */
						       local_entry, /* the ds entry */
						       smods,
						       do_modify);
	    } else if (is_group) {
		winsync_plugin_call_pre_ds_mod_group_cb(prp->agmt,
							windows_private_get_raw_entry(prp->agmt),
							remote_entry, /* the cooked ad entry */
							local_entry, /* the ds entry */
							smods,
							do_modify);
	    }
	}

	if (slapi_is_loglevel_set(SLAPI_LOG_REPL) && *do_modify)
	{
		slapi_mods_dump(smods,"windows sync");
	}
	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_generate_update_mods: %d\n", retval, 0, 0 );
	return retval;
}

static int
windows_update_remote_entry(Private_Repl_Protocol *prp,Slapi_Entry *remote_entry,Slapi_Entry *local_entry)
{
    Slapi_Mods smods = {0};
	int retval = 0;
	int do_modify = 0;

    slapi_mods_init (&smods, 0);
	retval = windows_generate_update_mods(prp,local_entry,remote_entry,1,&smods,&do_modify);
	/* Now perform the modify if we need to */
	if (0 == retval && do_modify)
	{
		char dnbuf[BUFSIZ];
		const char *dn = slapi_sdn_get_dn(slapi_entry_get_sdn_const(remote_entry));
		slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
			"windows_update_remote_entry: modifying entry %s\n", escape_string(dn, dnbuf));

		retval = windows_conn_send_modify(prp->conn, slapi_sdn_get_dn(slapi_entry_get_sdn_const(remote_entry)),slapi_mods_get_ldapmods_byref(&smods), NULL,NULL);
	} else
	{
		char dnbuf[BUFSIZ];
		const char *dn = slapi_sdn_get_dn(slapi_entry_get_sdn_const(remote_entry));
		slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
			"no mods generated for remote entry: %s\n", escape_string(dn, dnbuf));
	}
    slapi_mods_done(&smods);
	return retval;
}

static int
windows_update_local_entry(Private_Repl_Protocol *prp,Slapi_Entry *remote_entry,Slapi_Entry *local_entry)
{
    Slapi_Mods smods = {0};
	int retval = 0;
	Slapi_PBlock *pb = NULL;
	int do_modify = 0;

    slapi_mods_init (&smods, 0);

	retval = windows_generate_update_mods(prp,remote_entry,local_entry,0,&smods,&do_modify);
	/* Now perform the modify if we need to */
	if (0 == retval && do_modify)
	{
		int rc = 0;
		pb = slapi_pblock_new();
		if (pb)
		{
			char dnbuf[BUFSIZ];
			const char *dn = slapi_sdn_get_dn(slapi_entry_get_sdn_const(local_entry));
			slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
				"modifying entry: %s\n", escape_string(dn, dnbuf));
			slapi_modify_internal_set_pb (pb, slapi_entry_get_ndn(local_entry), slapi_mods_get_ldapmods_byref(&smods), NULL, NULL,
					repl_get_plugin_identity (PLUGIN_MULTIMASTER_REPLICATION), 0);
			slapi_modify_internal_pb (pb);		
			slapi_pblock_get (pb, SLAPI_PLUGIN_INTOP_RESULT, &rc);
			if (rc) 
			{
				slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
					"windows_update_local_entry: failed to modify entry %s\n", escape_string(dn, dnbuf));
			}
			slapi_pblock_destroy(pb);
		} else 
		{
			slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
			"failed to make pb in windows_update_local_entry\n");
		}

	} else
	{
		char dnbuf[BUFSIZ];
		const char *dn = slapi_sdn_get_dn(slapi_entry_get_sdn_const(local_entry));
		slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,
			"no mods generated for local entry: %s\n", escape_string(dn, dnbuf));
	}
    slapi_mods_done(&smods);
	return retval;
}

static int
windows_process_total_add(Private_Repl_Protocol *prp,Slapi_Entry *e, Slapi_DN* remote_dn, int missing_entry)
{
	int retval = 0;
	LDAPMod **entryattrs = NULL;
	Slapi_Entry *mapped_entry = NULL;
	char *password = NULL;
	const Slapi_DN* local_dn = NULL;
	int can_add = winsync_plugin_call_can_add_entry_to_ad_cb(prp->agmt, e, remote_dn);
	/* First map the entry */
	local_dn = slapi_entry_get_sdn_const(e);
	if (missing_entry) {
		if (can_add) {
			retval = windows_create_remote_entry(prp, e, remote_dn, &mapped_entry, &password);
		} else {
			return retval; /* cannot add and no entry to modify */
		}
	}
	/* Convert entry to mods */
	if (0 == retval && mapped_entry) 
	{
		(void)slapi_entry2mods (mapped_entry , NULL /* &entrydn : We don't need it */, &entryattrs);
		slapi_entry_free(mapped_entry);
		mapped_entry = NULL;
		if (NULL == entryattrs)
		{
			slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,"%s: windows_replay_update: Cannot convert entry to LDAPMods.\n",agmt_get_long_name(prp->agmt));
			retval = CONN_LOCAL_ERROR;
		}
		else
		{
			windows_log_add_entry_remote(local_dn, remote_dn);
			retval = windows_conn_send_add(prp->conn, slapi_sdn_get_dn(remote_dn), entryattrs, NULL, NULL /* returned controls */);
			/* It's possible that the entry already exists in AD, in which case we fall back to modify it */
			if (retval)
			{
				slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,"%s: windows_replay_update: Cannot replay add operation.\n",agmt_get_long_name(prp->agmt));
			}
			ldap_mods_free(entryattrs, 1);
			entryattrs = NULL;
		}
	} else
	{
		/* Entry already exists, need to mod it instead */
		Slapi_Entry *remote_entry = NULL;
		/* Get the remote entry */
		retval = windows_get_remote_entry(prp, remote_dn,&remote_entry);
		if (0 == retval && remote_entry) 
		{
			retval = windows_update_remote_entry(prp,remote_entry,e);
			/* Detect the case where the error is benign */
			if (retval)
			{
				int operation = 0;
				int error = 0;
				
				conn_get_error(prp->conn, &operation, &error);
				if (windows_ignore_error_and_keep_going(error))
				{
					retval = CONN_OPERATION_SUCCESS;
				}
			}
		}
		if (remote_entry)
		{
			slapi_entry_free(remote_entry);
		}
	}
	return retval;
}

/* Entry point for the total protocol */
int windows_process_total_entry(Private_Repl_Protocol *prp,Slapi_Entry *e)
{
	int retval = 0;
	int is_ours = 0;
	Slapi_DN *remote_dn = NULL;
	int missing_entry = 0;
	const Slapi_DN *local_dn = slapi_entry_get_sdn_const(e);
	/* First check if the entry is for us */
	is_ours = is_subject_of_agreement_local(e, prp->agmt);
	slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
		"%s: windows_process_total_entry: Looking dn=\"%s\" (%s)\n",
		agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(slapi_entry_get_sdn_const(e)), is_ours ? "ours" : "not ours");
	if (is_ours) 
	{
		retval = map_entry_dn_outbound(e,&remote_dn,prp,&missing_entry,0 /* we don't want the GUID */);
		if (retval || NULL == remote_dn) 
		{
			slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
				"%s: windows_replay_update: failed map dn for total update dn=\"%s\"\n",
				agmt_get_long_name(prp->agmt), slapi_sdn_get_dn(local_dn));
			goto error;
		}
		retval = windows_process_total_add(prp,e,remote_dn,missing_entry);
	}
	if (remote_dn)
	{
		slapi_sdn_free(&remote_dn);
	}
error:
	return retval;
}

static int
windows_search_local_entry_by_uniqueid(Private_Repl_Protocol *prp, const char *uniqueid, char ** attrs, Slapi_Entry **ret_entry, int tombstone, void * component_identity)
{
    Slapi_Entry **entries = NULL;
    Slapi_PBlock *int_search_pb = NULL;
    int rc = 0;
	char *filter_string = NULL;
	const Slapi_DN *local_subtree = NULL;
    
    *ret_entry = NULL;
	local_subtree = windows_private_get_directory_subtree(prp->agmt);

	/* Searching for tombstones can be expensive, so the caller needs to specify if
	 * we should search for a tombstone entry, or a normal entry. */
	if (tombstone) {
		filter_string = PR_smprintf("(&(objectclass=nsTombstone)(nsUniqueid=%s))", uniqueid);
	} else {
		filter_string = PR_smprintf("(&(|(objectclass=*)(objectclass=ldapsubentry))(nsUniqueid=%s))",uniqueid);
	}

    int_search_pb = slapi_pblock_new ();
	slapi_search_internal_set_pb ( int_search_pb,  slapi_sdn_get_dn(local_subtree), LDAP_SCOPE_SUBTREE, filter_string,
								   attrs ,
								   0 /* attrsonly */, NULL /* controls */,
								   NULL /* uniqueid */,
								   component_identity, 0 /* actions */ );
	slapi_search_internal_pb ( int_search_pb );
    slapi_pblock_get( int_search_pb, SLAPI_PLUGIN_INTOP_RESULT, &rc );
    if ( LDAP_SUCCESS == rc ) {
		slapi_pblock_get( int_search_pb, SLAPI_PLUGIN_INTOP_SEARCH_ENTRIES, &entries );
		if ( NULL != entries && NULL != entries[ 0 ]) {
			Slapi_Entry *temp_entry = NULL;
			temp_entry = entries[ 0 ];
			*ret_entry = slapi_entry_dup(temp_entry);
		} else {
			/* No entry there */
			rc = LDAP_NO_SUCH_OBJECT;
		}
    }
    slapi_free_search_results_internal(int_search_pb);
    slapi_pblock_destroy(int_search_pb);
	int_search_pb = NULL;
	if (filter_string)
	{
		PR_smprintf_free(filter_string);
	}
    return rc;
}

static int
windows_get_local_entry_by_uniqueid(Private_Repl_Protocol *prp,const char* uniqueid,Slapi_Entry **local_entry)
{
	int retval = ENTRY_NOTFOUND;
	Slapi_Entry *new_entry = NULL;
	windows_search_local_entry_by_uniqueid( prp, uniqueid, NULL, &new_entry, 0, /* Don't search tombstones */
			repl_get_plugin_identity (PLUGIN_MULTIMASTER_REPLICATION));
	if (new_entry) 
	{
		*local_entry = new_entry;
		retval = 0;
	} 
	return retval;
}

static int
windows_get_local_tombstone_by_uniqueid(Private_Repl_Protocol *prp,const char* uniqueid,Slapi_Entry **local_entry)
{
	int retval = ENTRY_NOTFOUND;
	Slapi_Entry *new_entry = NULL;
	windows_search_local_entry_by_uniqueid( prp, uniqueid, NULL, &new_entry, 1, /* Search for tombstones */
			repl_get_plugin_identity (PLUGIN_MULTIMASTER_REPLICATION));
	if (new_entry)
	{
		*local_entry = new_entry;
		retval = 0;
	}
	return retval;
}

static int
windows_get_local_entry(const Slapi_DN* local_dn,Slapi_Entry **local_entry)
{
	int retval = ENTRY_NOTFOUND;
	Slapi_Entry *new_entry = NULL;
	slapi_search_internal_get_entry( (Slapi_DN*)local_dn, NULL, &new_entry,
			repl_get_plugin_identity (PLUGIN_MULTIMASTER_REPLICATION));
	if (new_entry) 
	{
		*local_entry = new_entry;
		retval = 0;
	} 
	return retval;
}

static int 
windows_process_dirsync_entry(Private_Repl_Protocol *prp,Slapi_Entry *e, int is_total)
{
	Slapi_DN* local_sdn = NULL;
	int rc = 0;

	/* deleted users are outside the 'correct container'. 
	They live in cn=deleted objects, windows_private_get_directory_subtree( prp->agmt) */

	if (is_tombstone(prp, e))
	{
		rc = map_tombstone_dn_inbound(e, &local_sdn, prp->agmt);
		if ((0 == rc) && local_sdn)
		{
			/* Go ahead and delte the local peer */
			rc = windows_delete_local_entry(local_sdn);
			slapi_sdn_free(&local_sdn);
		} else
		{
			slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,"%s: windows_process_dirsync_entry: failed to map tombstone dn.\n",agmt_get_long_name(prp->agmt));
		}
	} else 
	{
		/* Is this entry one we should be interested in ? */
		if (is_subject_of_agreement_remote(e,prp->agmt)) 
		{
			/* First make its local DN */
			rc = map_entry_dn_inbound(e, &local_sdn, prp->agmt);
			if ((0 == rc) && local_sdn) 
			{
				Slapi_Entry *local_entry = NULL;
				/* Get the local entry if it exists */
				rc = windows_get_local_entry(local_sdn,&local_entry);
				if ((0 == rc) && local_entry) 
				{
					/* Since the entry exists we should now make it match the entry we received from AD */
					/* Actually we are better off simply fetching the entire entry from AD and using that 
					 * because otherwise we don't get all the attributes we need to make sense of it such as
					 * objectclass */
					Slapi_Entry *remote_entry = NULL;
					windows_get_remote_entry(prp,slapi_entry_get_sdn_const(e),&remote_entry);
					if (remote_entry)
					{
						/* We need to check for any deleted attrs from the dirsync entry
						 * and pass them into the newly fetched remote entry. */
						Slapi_Attr *attr = NULL;
						Slapi_Attr *rem_attr = NULL;
						entry_first_deleted_attribute(e, &attr);
						while (attr != NULL) {
							/* We need to dup the attr and add it to the remote entry.
							 * rem_attr is now owned by remote_entry, so don't free it */
							rem_attr = slapi_attr_dup(attr);
							if (rem_attr) {
								entry_add_deleted_attribute_wsi(remote_entry, rem_attr);
								rem_attr = NULL;
							}
							entry_next_deleted_attribute(e, &attr);
						}

						rc = windows_update_local_entry(prp, remote_entry, local_entry);
						slapi_entry_free(remote_entry);
						remote_entry = NULL;
					} else 
					{
						slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,"%s: windows_process_dirsync_entry: failed to fetch inbound entry.\n",agmt_get_long_name(prp->agmt));
					}
					slapi_entry_free(local_entry);
					if (rc) {
						/* Something bad happened */
						slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,"%s: windows_process_dirsync_entry: failed to update inbound entry for %s.\n",agmt_get_long_name(prp->agmt),
							slapi_sdn_get_dn(slapi_entry_get_sdn_const(e)));
					}
				} else 
				{
					/* If it doesn't exist, try to make it */
					if (add_local_entry_allowed(prp,e))
					{
						windows_create_local_entry(prp,e,local_sdn);
					} else
					{
						slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,"%s: windows_process_dirsync_entry: not allowed to add entry %s.\n",agmt_get_long_name(prp->agmt)
							, slapi_sdn_get_dn(slapi_entry_get_sdn_const(e)));
					}
				}
				slapi_sdn_free(&local_sdn);
			} else 
			{
				/* We should have been able to map the DN, so this is an error */
				slapi_log_error(SLAPI_LOG_REPL, windows_repl_plugin_name,"%s: windows_process_dirsync_entry: failed to map inbound entry %s.\n",agmt_get_long_name(prp->agmt)
					, slapi_sdn_get_dn(slapi_entry_get_sdn_const(e)));
			}
		} /* subject of agreement */
	} /* is tombstone */
	return rc;
}

void 
windows_dirsync_inc_run(Private_Repl_Protocol *prp)
	{ 
	
	int rc = 0;
	int done = 0;

	LDAPDebug( LDAP_DEBUG_TRACE, "=> windows_dirsync_inc_run\n", 0, 0, 0 );
	while (!done) {

		Slapi_Entry *e = NULL;

		rc = send_dirsync_search(prp->conn);
		if (rc != CONN_OPERATION_SUCCESS)
		{
			slapi_log_error(SLAPI_LOG_FATAL, windows_repl_plugin_name,
				"failed to send dirsync search request: %d\n", rc);
			goto error;
		}

		while ( (e = windows_conn_get_search_result(prp->conn) ) != NULL)
		{
			rc = windows_process_dirsync_entry(prp,e,0);
			if (e) 
			{
				slapi_entry_free(e);
			}
		} /* While entry != NULL */
		if (!windows_private_dirsync_has_more(prp->agmt)) 
		{
			done = 1;
		}
	} /* While !done */
error:
	LDAPDebug( LDAP_DEBUG_TRACE, "<= windows_dirsync_inc_run\n", 0, 0, 0 );
}