/*
 * Copyright 1998-2003 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/string.h>
#include <ac/socket.h>

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

int
meta_back_modify(
		Backend	*be,
		Connection	*conn,
		Operation	*op,
		struct berval	*dn,
		struct berval	*ndn,
		Modifications	*modlist
)
{
	struct metainfo	*li = ( struct metainfo * )be->be_private;
	struct metaconn *lc;
	LDAPMod **modv;
	LDAPMod *mods;
	Modifications *ml;
	int candidate = -1, i;
	char *mdn;
	struct berval mapped;

	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_OTHER,
				NULL, NULL, NULL, NULL );
		return -1;
	}

	/*
	 * Rewrite the modify dn, if needed
	 */
	switch ( rewrite_session( li->targets[ candidate ]->rwinfo,
				"modifyDn", dn->bv_val, conn, &mdn ) ) {
	case REWRITE_REGEXEC_OK:
		if ( mdn == NULL ) {
			mdn = ( char * )dn->bv_val;
		}
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_META, DETAIL1,
			"[rw] modifyDn: \"%s\" -> \"%s\"\n", dn->bv_val, mdn, 0 );
#else /* !NEW_LOGGING */
		Debug( LDAP_DEBUG_ARGS, "rw> modifyDn: \"%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, "Operation not allowed", NULL, NULL );
		return -1;

	case REWRITE_REGEXEC_ERR:
		send_ldap_result( conn, op, LDAP_OTHER,
				NULL, "Rewrite error", NULL, NULL );
		return -1;
	}

	for ( i = 0, ml = modlist; ml; i++ ,ml = ml->sml_next )
		;

	mods = ch_malloc( sizeof( LDAPMod )*i );
	if ( mods == NULL ) {
		if ( mdn != dn->bv_val ) {
			free( mdn );
		}
		return -1;
	}
	modv = ( LDAPMod ** )ch_malloc( ( i + 1 )*sizeof( LDAPMod * ) );
	if ( modv == NULL ) {
		free( mods );
		if ( mdn != dn->bv_val ) {
			free( mdn );
		}
		return -1;
	}

	for ( i = 0, ml = modlist; ml; ml = ml->sml_next ) {
		int j;

		if ( ml->sml_desc->ad_type->sat_no_user_mod  ) {
			continue;
		}

		ldap_back_map( &li->targets[ candidate ]->at_map,
				&ml->sml_desc->ad_cname, &mapped, 0 );
		if ( mapped.bv_val == NULL ) {
			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 ( strcmp( ml->sml_desc->ad_type->sat_syntax->ssyn_oid,
					SLAPD_DN_SYNTAX ) == 0 ) {
			ldap_dnattr_rewrite(
				li->targets[ candidate ]->rwinfo,
				ml->sml_bvalues, conn );
		}

		if ( ml->sml_bvalues != NULL ){
			for (j = 0; ml->sml_bvalues[ j ].bv_val; j++);
			mods[ i ].mod_bvalues = (struct berval **)ch_malloc((j+1) *
				sizeof(struct berval *));
			for (j = 0; ml->sml_bvalues[ j ].bv_val; j++)
				mods[ i ].mod_bvalues[ j ] = &ml->sml_bvalues[j];
			mods[ i ].mod_bvalues[ j ] = NULL;

		} else {
			mods[ i ].mod_bvalues = NULL;
		}

		i++;
	}
	modv[ i ] = 0;

	ldap_modify_s( lc->conns[ candidate ].ld, mdn, modv );

	if ( mdn != dn->bv_val ) {
		free( mdn );
	}
	for ( i=0; modv[ i ]; i++)
		free( modv[ i ]->mod_bvalues );
	free( mods );
	free( modv );
	return meta_back_op_result( lc, op );
}