text: /* $OpenLDAP: pkg/ldap/servers/slapd/back-meta/modify.c,v 1.52.2.11 2011/01/04 23:50:35 kurt Exp $ */
  /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   *
   * Copyright 1999-2011 The OpenLDAP Foundation.
   * Portions Copyright 2001-2003 Pierangelo Masarati.
   * Portions Copyright 1999-2003 Howard Chu.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted only as authorized by the OpenLDAP
   * Public License.
   *
   * A copy of this license is available in the file LICENSE in the
   * top-level directory of the distribution or, alternatively, at
   * <http://www.OpenLDAP.org/license.html>.
   */
  /* ACKNOWLEDGEMENTS:
   * This work was initially developed by the Howard Chu for inclusion
   * in OpenLDAP Software and subsequently enhanced by Pierangelo
   * Masarati.
   */
  
  #include "portable.h"
  
  #include <stdio.h>
  
  #include <ac/string.h>
  #include <ac/socket.h>
  
  #include "slap.h"
  #include "../back-ldap/back-ldap.h"
  #include "back-meta.h"
  
  int
  meta_back_modify( Operation *op, SlapReply *rs )
  {
  	metainfo_t	*mi = ( metainfo_t * )op->o_bd->be_private;
  	metatarget_t	*mt;
  	metaconn_t	*mc;
  	int		rc = 0;
  	LDAPMod		**modv = NULL;
  	LDAPMod		*mods = NULL;
  	Modifications	*ml;
  	int		candidate = -1, i;
  	int		isupdate;
  	struct berval	mdn = BER_BVNULL;
  	struct berval	mapped;
  	dncookie	dc;
  	int		msgid;
  	ldap_back_send_t	retrying = LDAP_BACK_RETRYING;
  	LDAPControl	**ctrls = NULL;
  
  	mc = meta_back_getconn( op, rs, &candidate, LDAP_BACK_SENDERR );
  	if ( !mc || !meta_back_dobind( op, rs, mc, LDAP_BACK_SENDERR ) ) {
  		return rs->sr_err;
  	}
  
  	assert( mc->mc_conns[ candidate ].msc_ld != NULL );
  
  	/*
  	 * Rewrite the modify dn, if needed
  	 */
  	mt = mi->mi_targets[ candidate ];
  	dc.target = mt;
  	dc.conn = op->o_conn;
  	dc.rs = rs;
  	dc.ctx = "modifyDN";
  
  	if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
  		send_ldap_result( op, rs );
  		goto cleanup;
  	}
  
  	for ( i = 0, ml = op->orm_modlist; ml; i++ ,ml = ml->sml_next )
  		;
  
  	mods = ch_malloc( sizeof( LDAPMod )*i );
  	if ( mods == NULL ) {
  		rs->sr_err = LDAP_OTHER;
  		send_ldap_result( op, rs );
  		goto cleanup;
  	}
  	modv = ( LDAPMod ** )ch_malloc( ( i + 1 )*sizeof( LDAPMod * ) );
  	if ( modv == NULL ) {
  		rs->sr_err = LDAP_OTHER;
  		send_ldap_result( op, rs );
  		goto cleanup;
  	}
  
  	dc.ctx = "modifyAttrDN";
  	isupdate = be_shadow_update( op );
  	for ( i = 0, ml = op->orm_modlist; ml; ml = ml->sml_next ) {
  		int	j, is_oc = 0;
  
  		if ( !isupdate && !get_relax( op ) && ml->sml_desc->ad_type->sat_no_user_mod  )
  		{
  			continue;
  		}
  
  		if ( ml->sml_desc == slap_schema.si_ad_objectClass 
  				|| ml->sml_desc == slap_schema.si_ad_structuralObjectClass )
  		{
  			is_oc = 1;
  			mapped = ml->sml_desc->ad_cname;
  
  		} else {
  			ldap_back_map( &mt->mt_rwmap.rwm_at,
  					&ml->sml_desc->ad_cname, &mapped,
  					BACKLDAP_MAP );
  			if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
  				continue;
  			}
  		}
  
  		modv[ i ] = &mods[ i ];
  		mods[ i ].mod_op = ml->sml_op | LDAP_MOD_BVALUES;
  		mods[ i ].mod_type = mapped.bv_val;
  
  		/*
  		 * FIXME: dn-valued attrs should be rewritten
  		 * to allow their use in ACLs at the back-ldap
  		 * level.
  		 */
  		if ( ml->sml_values != NULL ) {
  			if ( is_oc ) {
  				for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ )
  					;
  				mods[ i ].mod_bvalues =
  					(struct berval **)ch_malloc( ( j + 1 ) *
  					sizeof( struct berval * ) );
  				for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); ) {
  					struct ldapmapping	*mapping;
  
  					ldap_back_mapping( &mt->mt_rwmap.rwm_oc,
  							&ml->sml_values[ j ], &mapping, BACKLDAP_MAP );
  
  					if ( mapping == NULL ) {
  						if ( mt->mt_rwmap.rwm_oc.drop_missing ) {
  							continue;
  						}
  						mods[ i ].mod_bvalues[ j ] = &ml->sml_values[ j ];
  
  					} else {
  						mods[ i ].mod_bvalues[ j ] = &mapping->dst;
  					}
  					j++;
  				}
  				mods[ i ].mod_bvalues[ j ] = NULL;
  
  			} else {
  				if ( ml->sml_desc->ad_type->sat_syntax ==
  						slap_schema.si_syn_distinguishedName )
  				{
  					( void )ldap_dnattr_rewrite( &dc, ml->sml_values );
  					if ( ml->sml_values == NULL ) {
  						continue;
  					}
  				}
  
  				for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ )
  					;
  				mods[ i ].mod_bvalues =
  					(struct berval **)ch_malloc( ( j + 1 ) *
  					sizeof( struct berval * ) );
  				for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ ) {
  					mods[ i ].mod_bvalues[ j ] = &ml->sml_values[ j ];
  				}
  				mods[ i ].mod_bvalues[ j ] = NULL;
  			}
  
  		} else {
  			mods[ i ].mod_bvalues = NULL;
  		}
  
  		i++;
  	}
  	modv[ i ] = 0;
  
  retry:;
  	ctrls = op->o_ctrls;
  	rc = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
  	if ( rc != LDAP_SUCCESS ) {
  		send_ldap_result( op, rs );
  		goto cleanup;
  	}
  
  	rs->sr_err = ldap_modify_ext( mc->mc_conns[ candidate ].msc_ld, mdn.bv_val,
  			modv, ctrls, NULL, &msgid );
  	rs->sr_err = meta_back_op_result( mc, op, rs, candidate, msgid,
  		mt->mt_timeout[ SLAP_OP_MODIFY ], ( LDAP_BACK_SENDRESULT | retrying ) );
  	if ( rs->sr_err == LDAP_UNAVAILABLE && retrying ) {
  		retrying &= ~LDAP_BACK_RETRYING;
  		if ( meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_SENDERR ) ) {
  			/* if the identity changed, there might be need to re-authz */
  			(void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
  			goto retry;
  		}
  	}
  
  cleanup:;
  	(void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
  
  	if ( mdn.bv_val != op->o_req_dn.bv_val ) {
  		free( mdn.bv_val );
  		BER_BVZERO( &mdn );
  	}
  	if ( modv != NULL ) {
  		for ( i = 0; modv[ i ]; i++ ) {
  			free( modv[ i ]->mod_bvalues );
  		}
  	}
  	free( mods );
  	free( modv );
  
  	if ( mc ) {
  		meta_back_release_conn( mi, mc );
  	}
  
  	return rs->sr_err;
  }
  
  