/*
 * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 *
 * Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
 *
 * This work has been developed to fulfill the requirements
 * of SysNet s.n.c. <http:www.sys-net.it> and it has been donated
 * to the OpenLDAP Foundation in the hope that it may be useful
 * to the Open Source community, but WITHOUT ANY WARRANTY.
 *
 * Permission is granted to anyone to use this software for any purpose
 * on any computer system, and to alter it and redistribute it, subject
 * to the following restrictions:
 *
 * 1. The author and SysNet s.n.c. are not responsible for the consequences
 *    of use of this software, no matter how awful, even if they arise from 
 *    flaws in it.
 *
 * 2. The origin of this software must not be misrepresented, either by
 *    explicit claim or by omission.  Since few users ever read sources,
 *    credits should appear in the documentation.
 *
 * 3. Altered versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.  Since few users
 *    ever read sources, credits should appear in the documentation.
 *    SysNet s.n.c. cannot be responsible for the consequences of the
 *    alterations.
 *
 * 4. This notice may not be removed or altered.
 *
 *
 * This software is based on the backend back-ldap, implemented
 * by Howard Chu <hyc@highlandsun.com>, and modified by Mark Valence
 * <kurash@sassafras.com>, Pierangelo Masarati <ando@sys-net.it> and other
 * contributors. The contribution of the original software to the present
 * implementation is acknowledged in this copyright statement.
 *
 * A special acknowledgement goes to Howard for the overall architecture
 * (and for borrowing large pieces of code), and to Mark, who implemented
 * from scratch the attribute/objectclass mapping.
 *
 * The original copyright statement follows.
 *
 * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
 *
 * Permission is granted to anyone to use this software for any purpose
 * on any computer system, and to alter it and redistribute it, subject
 * to the following restrictions:
 *
 * 1. The author is not responsible for the consequences of use of this
 *    software, no matter how awful, even if they arise from flaws in it.
 *
 * 2. The origin of this software must not be misrepresented, either by
 *    explicit claim or by omission.  Since few users ever read sources,
 *    credits should appear in the documentation.
 *
 * 3. Altered versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.  Since few users
 *    ever read sources, credits should appear in the
 *    documentation.
 *
 * 4. This notice may not be removed or altered.
 *
 */

#include "portable.h"

#include <stdio.h>

#include <ac/socket.h>
#include <ac/string.h>

#include "slap.h"
#include "../back-ldap/back-ldap.h"
#include "back-meta.h"

int
meta_back_modrdn(
		Backend		*be,
		Connection	*conn,
		Operation	*op,
		struct berval	*dn,
		struct berval	*ndn,
		struct berval	*newrdn,
		struct berval	*nnewrdn,
		int		deleteoldrdn,
		struct berval	*newSuperior,
		struct berval	*nnewSuperior
)
{
	struct metainfo *li = ( struct metainfo * )be->be_private;
	struct metaconn *lc;
	int candidate = -1;

	char *mdn = NULL, *mnewSuperior = NULL;

	lc = meta_back_getconn( li, conn, op, META_OP_REQUIRE_SINGLE,
			ndn, &candidate );
	if ( !lc || !meta_back_dobind( lc, op ) || !meta_back_is_valid( lc, candidate ) ) {
		send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
				NULL, NULL, NULL, NULL );
		return -1;
	}

	if ( newSuperior ) {
		int nsCandidate, version = LDAP_VERSION3;

		nsCandidate = meta_back_select_unique_candidate( li,
				newSuperior );

		if ( nsCandidate != candidate ) {
			/*
			 * FIXME: one possibility is to delete the entry
			 * from one target and add it to the other;
			 * unfortunately we'd need write access to both,
			 * which is nearly impossible; for administration
			 * needs, the rootdn of the metadirectory could
			 * be mapped to an administrative account on each
			 * target (the binddn?); we'll see.
			 */
			/*
			 * FIXME: is this the correct return code?
			 */
			send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
					NULL, NULL, NULL, NULL );
			return -1;
		}

		ldap_set_option( lc->conns[ nsCandidate ]->ld,
				LDAP_OPT_PROTOCOL_VERSION, &version );
		
		/*
		 * Rewrite the new superior, if defined and required
	 	 */
		switch ( rewrite_session( li->targets[ nsCandidate ]->rwinfo,
					"newSuperiorDn",
					newSuperior->bv_val, 
					conn, 
					&mnewSuperior ) ) {
		case REWRITE_REGEXEC_OK:
			if ( mnewSuperior == NULL ) {
				mnewSuperior = ( char * )newSuperior;
			}
#ifdef NEW_LOGGING
			LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
					"[rw] newSuperiorDn:"
					" \"%s\" -> \"%s\"\n",
					newSuperior, mnewSuperior ));
#else /* !NEW_LOGGING */
			Debug( LDAP_DEBUG_ARGS, "rw> newSuperiorDn:"
					" \"%s\" -> \"%s\"\n%s",
					newSuperior->bv_val, mnewSuperior, "" );
#endif /* !NEW_LOGGING */
			break;

		case REWRITE_REGEXEC_UNWILLING:
			send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
					NULL, NULL, NULL, NULL );
			return -1;

		case REWRITE_REGEXEC_ERR:
			send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
					NULL, NULL, NULL, NULL );
			return -1;
		}
	}

	/*
	 * Rewrite the modrdn dn, if required
	 */
	switch ( rewrite_session( li->targets[ candidate ]->rwinfo,
				"modrDn", dn->bv_val, conn, &mdn ) ) {
	case REWRITE_REGEXEC_OK:
		if ( mdn == NULL ) {
			mdn = ( char * )dn->bv_val;
		}
#ifdef NEW_LOGGING
		LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
				"[rw] modrDn: \"%s\" -> \"%s\"\n",
				dn->bv_val, mdn ));
#else /* !NEW_LOGGING */
		Debug( LDAP_DEBUG_ARGS, "rw> modrDn: \"%s\" -> \"%s\"\n%s",
				dn->bv_val, mdn, "" );
#endif /* !NEW_LOGGING */
		break;
		
	case REWRITE_REGEXEC_UNWILLING:
		send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
				NULL, NULL, NULL, NULL );
		return -1;

	case REWRITE_REGEXEC_ERR:
		send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
				NULL, NULL, NULL, NULL );
		return -1;
	}

	ldap_rename2_s( lc->conns[ candidate ]->ld, mdn, newrdn->bv_val,
			mnewSuperior, deleteoldrdn );

	if ( mdn != dn->bv_val ) {
		free( mdn );
	}
	if ( mnewSuperior != NULL && mnewSuperior != newSuperior->bv_val ) {
		free( mnewSuperior );
	}
	
	return meta_back_op_result( lc, op );
}

