openldap/servers/slapd/back-meta/config.c

/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1999-2005 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 "lutil.h"
#include "../back-ldap/back-ldap.h"
#undef ldap_debug       /* silence a warning in ldap-int.h */
#include "../../../libraries/libldap/ldap-int.h"
#include "back-meta.h"

static struct metatarget *
new_target( void )
{
	struct metatarget *lt;
        struct ldapmapping *mapping;

	lt = ch_calloc( sizeof( struct metatarget ), 1 );
	if ( lt == NULL ) {
		return NULL;
	}

	lt->mt_rwmap.rwm_rw = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
	if ( lt->mt_rwmap.rwm_rw == NULL ) {
		free( lt );
                return NULL;
	}

	{
		char	*rargv[3];

		/*
		 * the filter rewrite as a string must be disabled
		 * by default; it can be re-enabled by adding rules;
		 * this creates an empty rewriteContext
		 */
		rargv[ 0 ] = "rewriteContext";
		rargv[ 1 ] = "searchFilter";
		rargv[ 2 ] = NULL;
		rewrite_parse( lt->mt_rwmap.rwm_rw, "<suffix massage>", 
				1, 2, rargv );

		rargv[ 0 ] = "rewriteContext";
		rargv[ 1 ] = "default";
		rargv[ 2 ] = NULL;
		rewrite_parse( lt->mt_rwmap.rwm_rw, "<suffix massage>", 
				1, 2, rargv );
	}

	ldap_back_map_init( &lt->mt_rwmap.rwm_at, &mapping );

	return lt;
}

int
meta_back_db_config(
		BackendDB	*be,
		const char	*fname,
		int		lineno,
		int		argc,
		char		**argv
)
{
	struct metainfo *li = ( struct metainfo * )be->be_private;

	if ( li == NULL ) {
		fprintf( stderr, 
	"%s: line %d: meta backend info is null!\n",
		    fname, lineno );
		return 1;
	}

	/* URI of server to query */
	if ( strcasecmp( argv[ 0 ], "uri" ) == 0 ) {
		int 		i = li->ntargets;
#if 0
		int 		j;
#endif /* uncomment if uri MUST be a branch of suffix */
		LDAPURLDesc 	*ludp, *tmpludp;
		struct berval	dn;
		int		rc;
		
		if ( argc != 2 ) {
			fprintf( stderr,
	"%s: line %d: missing address"
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
				fname, lineno );
			return 1;
		}
		
		++li->ntargets;

		li->targets = ch_realloc( li->targets, 
			sizeof( struct metatarget *)*li->ntargets );
		if ( li->targets == NULL ) {
			fprintf( stderr,
	"%s: line %d: out of memory while storing server name"
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
				fname, lineno );
			return 1;
		}

		if ( ( li->targets[ i ] = new_target() ) == NULL ) {
			fprintf( stderr,
	"%s: line %d: unable to init server"
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
				fname, lineno );
			return 1;
		}

		/*
		 * uri MUST be legal!
		 */
		if ( ldap_url_parselist_ext( &ludp, argv[ 1 ], "\t" ) != LDAP_SUCCESS ) {
			fprintf( stderr,
	"%s: line %d: unable to parse URI"
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
				fname, lineno );
			return 1;
		}

		/*
		 * uri MUST have the <dn> part!
		 */
		if ( ludp->lud_dn == NULL || ludp->lud_dn[ 0 ] == '\0' ) {
			fprintf( stderr,
	"%s: line %d: missing <naming context> "
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
				fname, lineno );
			return 1;
		}

		/*
		 * copies and stores uri and suffix
		 */
		dn.bv_val = ludp->lud_dn;
		dn.bv_len = strlen( ludp->lud_dn );

		rc = dnPrettyNormal( NULL, &dn, &li->targets[ i ]->mt_psuffix,
			&li->targets[ i ]->mt_nsuffix, NULL );
		if( rc != LDAP_SUCCESS ) {
			fprintf( stderr, "%s: line %d: "
					"target '%s' DN is invalid\n",
					fname, lineno, argv[ 1 ] );
			return( 1 );
		}

		ludp->lud_dn[ 0 ] = '\0';

		/* check all, to apply the scope check on the first one */
		for ( tmpludp = ludp; tmpludp; tmpludp = tmpludp->lud_next ) {
			if ( tmpludp->lud_dn != NULL && tmpludp->lud_dn[ 0 ] != '\0' ) {
				fprintf( stderr, "%s: line %d: "
						"multiple URIs must have "
						"no DN part\n",
					fname, lineno );
				return( 1 );

			}

			if ( tmpludp->lud_scope == LDAP_SCOPE_BASE ) {
				tmpludp->lud_scope = LDAP_SCOPE_DEFAULT;
			}
		}

		li->targets[ i ]->mt_uri = ldap_url_list2urls( ludp );
		ldap_free_urllist( ludp );
		if ( li->targets[ i ]->mt_uri == NULL) {
			fprintf( stderr, "%s: line %d: no memory?\n",
					fname, lineno );
			return( 1 );
		}
		
		/*
		 * uri MUST be a branch of suffix!
		 */
#if 0 /* too strict a constraint */
		if ( select_backend( &li->targets[ i ]->suffix, 0, 0 ) != be ) {
			fprintf( stderr,
	"%s: line %d: <naming context> of URI does not refer to current backend"
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
				fname, lineno );
			return 1;
		}
#else
		/*
		 * uri MUST be a branch of a suffix!
		 */
		if ( select_backend( &li->targets[ i ]->mt_nsuffix, 0, 0 ) == NULL ) {
			fprintf( stderr,
	"%s: line %d: <naming context> of URI does not resolve to a backend"
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
				fname, lineno );
			return 1;
		}
#endif

#if 0
		/*
		 * uri MUST not be used by other URIs!
		 *
		 * FIXME: this limitation may be removed,
		 * or worked out, at least, in some manner
		 */
		for ( j = 0; j < i-1; j++ ) {
			if ( dn_match( &li->targets[ i ]->suffix,
					&li->targets[ j ]->suffix ) ) {
				fprintf( stderr,
	"%s: line %d: naming context \"%s\" already used"
	" in \"uri <protocol>://<server>[:port]/<naming context>\" line\n",
					fname, lineno, last+1 );
				return 1;
			}
		}
#endif

#if 0
		fprintf(stderr, "%s: line %d: URI \"%s\", suffix \"%s\"\n",
			fname, lineno, li->targets[ i ]->uri, 
			li->targets[ i ]->psuffix.bv_val );
#endif
		
	/* default target directive */
	} else if ( strcasecmp( argv[ 0 ], "default-target" ) == 0 ) {
		int 		i = li->ntargets-1;
		
		if ( argc == 1 ) {
 			if ( i < 0 ) {
				fprintf( stderr,
	"%s: line %d: \"default-target\" alone need be"
       	" inside a \"uri\" directive\n",
					fname, lineno );
				return 1;
			}
			li->defaulttarget = i;
		} else {
			if ( strcasecmp( argv[ 1 ], "none" ) == 0 ) {
				if ( i >= 0 ) {
					fprintf( stderr,
	"%s: line %d: \"default-target none\""
       	" should go before uri definitions\n",
						fname, lineno );
				}
				li->defaulttarget = META_DEFAULT_TARGET_NONE;
			} else {
				int n = atoi( argv[ 1 ] );
				if ( n < 1 || n >= i ) {
					fprintf( stderr,
	"%s: line %d: illegal target number %d\n",
						fname, lineno, n );
					return 1;
				}
				li->defaulttarget = n-1;
			}
		}
		
	/* ttl of dn cache */
	} else if ( strcasecmp( argv[ 0 ], "dncache-ttl" ) == 0 ) {
		if ( argc != 2 ) {
			fprintf( stderr,
	"%s: line %d: missing ttl in \"dncache-ttl <ttl>\" line\n",
				fname, lineno );
			return 1;
		}
		
		if ( strcasecmp( argv[ 1 ], "forever" ) == 0 ) {
			li->cache.ttl = META_DNCACHE_FOREVER;
		} else if ( strcasecmp( argv[ 1 ], "disabled" ) == 0 ) {
			li->cache.ttl = META_DNCACHE_DISABLED;
		} else {
			li->cache.ttl = atol( argv[ 1 ] );
		}

	/* network timeout when connecting to ldap servers */
	} else if ( strcasecmp( argv[ 0 ], "network-timeout" ) == 0 ) {
		if ( argc != 2 ) {
			fprintf( stderr,
	"%s: line %d: missing network timeout in \"network-timeout <seconds>\" line\n",
				fname, lineno );
			return 1;
		}
		li->network_timeout = atol(argv[ 1 ]);

	/* name to use for meta_back_group */
	} else if ( strcasecmp( argv[ 0 ], "acl-authcDN" ) == 0
			|| strcasecmp( argv[ 0 ], "binddn" ) == 0 )
	{
		int 		i = li->ntargets-1;
		struct berval	dn;

		if ( i < 0 ) {
			fprintf( stderr,
	"%s: line %d: need \"uri\" directive first\n",
				fname, lineno );
			return 1;
		}
		
		if ( argc != 2 ) {
			fprintf( stderr,
	"%s: line %d: missing name in \"binddn <name>\" line\n",
				fname, lineno );
			return 1;
		}

		if ( strcasecmp( argv[ 0 ], "binddn" ) == 0 ) {
			fprintf( stderr, "%s: line %d: "
				"\"binddn\" statement is deprecated; "
				"use \"acl-authcDN\" instead\n",
				fname, lineno );
			/* FIXME: some day we'll need to throw an error */
		}

		dn.bv_val = argv[ 1 ];
		dn.bv_len = strlen( argv[ 1 ] );
		if ( dnNormalize( 0, NULL, NULL, &dn, &li->targets[ i ]->mt_binddn,
			NULL ) != LDAP_SUCCESS )
		{
			fprintf( stderr, "%s: line %d: "
					"bind DN '%s' is invalid\n",
					fname, lineno, argv[ 1 ] );
			return( 1 );
		}

	/* password to use for meta_back_group */
	} else if ( strcasecmp( argv[ 0 ], "acl-passwd" ) == 0
			|| strcasecmp( argv[ 0 ], "bindpw" ) == 0 )
	{
		int 		i = li->ntargets-1;

		if ( i < 0 ) {
			fprintf( stderr,
	"%s: line %d: need \"uri\" directive first\n",
				fname, lineno );
			return 1;
		}
		
		if ( argc != 2 ) {
			fprintf( stderr,
	"%s: line %d: missing password in \"bindpw <password>\" line\n",
			    fname, lineno );
			return 1;
		}

		if ( strcasecmp( argv[ 0 ], "bindpw" ) == 0 ) {
			fprintf( stderr, "%s: line %d: "
				"\"bindpw\" statement is deprecated; "
				"use \"acl-passwd\" instead\n",
				fname, lineno );
			/* FIXME: some day we'll need to throw an error */
		}

		ber_str2bv( argv[ 1 ], 0L, 1, &li->targets[ i ]->mt_bindpw );
		
	/* save bind creds for referral rebinds? */
	} else if ( strcasecmp( argv[0], "rebind-as-user" ) == 0 ) {
		if (argc != 1) {
			fprintf( stderr,
	"%s: line %d: rebind-as-user takes no arguments\n",
			    fname, lineno );
			return( 1 );
		}

		li->flags |= LDAP_BACK_F_SAVECRED;

	} else if ( strcasecmp( argv[0], "chase-referrals" ) == 0 ) {
		if ( argc != 1 ) {
			fprintf( stderr,
	"%s: line %d: \"chase-referrals\" takes no arguments\n",
					fname, lineno );
			return( 1 );
		}

		li->flags |= LDAP_BACK_F_CHASE_REFERRALS;

	} else if ( strcasecmp( argv[0], "dont-chase-referrals" ) == 0 ) {
		if ( argc != 1 ) {
			fprintf( stderr,
	"%s: line %d: \"dont-chase-referrals\" takes no arguments\n",
					fname, lineno );
			return( 1 );
		}

		li->flags &= ~LDAP_BACK_F_CHASE_REFERRALS;

	} else if ( strncasecmp( argv[0], "tls-", STRLENOF( "tls-" ) ) == 0 ) {

		/* start tls */
		if ( strcasecmp( argv[0], "tls-start" ) == 0 ) {
			if ( argc != 1 ) {
				fprintf( stderr,
		"%s: line %d: tls-start takes no arguments\n",
						fname, lineno );
				return( 1 );
			}
			li->flags |= ( LDAP_BACK_F_USE_TLS | LDAP_BACK_F_TLS_CRITICAL );
	
		/* try start tls */
		} else if ( strcasecmp( argv[0], "tls-try-start" ) == 0 ) {
			if ( argc != 1 ) {
				fprintf( stderr,
		"%s: line %d: tls-try-start takes no arguments\n",
						fname, lineno );
				return( 1 );
			}
			li->flags &= ~LDAP_BACK_F_TLS_CRITICAL;
			li->flags |= LDAP_BACK_F_USE_TLS;
	
		/* propagate start tls */
		} else if ( strcasecmp( argv[0], "tls-propagate" ) == 0 ) {
			if ( argc != 1 ) {
				fprintf( stderr,
		"%s: line %d: tls-propagate takes no arguments\n",
						fname, lineno );
				return( 1 );
			}
			li->flags |= ( LDAP_BACK_F_PROPAGATE_TLS | LDAP_BACK_F_TLS_CRITICAL );
		
		/* try start tls */
		} else if ( strcasecmp( argv[0], "tls-try-propagate" ) == 0 ) {
			if ( argc != 1 ) {
				fprintf( stderr,
		"%s: line %d: tls-try-propagate takes no arguments\n",
						fname, lineno );
				return( 1 );
			}
			li->flags &= ~LDAP_BACK_F_TLS_CRITICAL;
			li->flags |= LDAP_BACK_F_PROPAGATE_TLS;
		}
	
	/* name to use as pseudo-root dn */
	} else if ( strcasecmp( argv[ 0 ], "pseudorootdn" ) == 0 ) {
		int 		i = li->ntargets-1;
		struct berval	dn;

		if ( i < 0 ) {
			fprintf( stderr,
	"%s: line %d: need \"uri\" directive first\n",
				fname, lineno );
			return 1;
		}
		
		if ( argc != 2 ) {
			fprintf( stderr,
	"%s: line %d: missing name in \"pseudorootdn <name>\" line\n",
				fname, lineno );
			return 1;
		}

		dn.bv_val = argv[ 1 ];
		dn.bv_len = strlen( argv[ 1 ] );
		if ( dnNormalize( 0, NULL, NULL, &dn,
			&li->targets[ i ]->mt_pseudorootdn, NULL ) != LDAP_SUCCESS )
		{
			fprintf( stderr, "%s: line %d: "
					"pseudoroot DN '%s' is invalid\n",
					fname, lineno, argv[ 1 ] );
			return( 1 );
		}

	/* password to use as pseudo-root */
	} else if ( strcasecmp( argv[ 0 ], "pseudorootpw" ) == 0 ) {
		int 		i = li->ntargets-1;

		if ( i < 0 ) {
			fprintf( stderr,
	"%s: line %d: need \"uri\" directive first\n",
				fname, lineno );
			return 1;
		}
		
		if ( argc != 2 ) {
			fprintf( stderr,
	"%s: line %d: missing password in \"pseudorootpw <password>\" line\n",
			    fname, lineno );
			return 1;
		}
		ber_str2bv( argv[ 1 ], 0L, 1, &li->targets[ i ]->mt_pseudorootpw );
	
	/* dn massaging */
	} else if ( strcasecmp( argv[ 0 ], "suffixmassage" ) == 0 ) {
		BackendDB 	*tmp_be;
		int 		i = li->ntargets-1;
		struct berval	dn, nvnc, pvnc, nrnc, prnc;

		if ( i < 0 ) {
			fprintf( stderr,
	"%s: line %d: need \"uri\" directive first\n",
				fname, lineno );
			return 1;
		}
		
		/*
		 * syntax:
		 * 
		 * 	suffixmassage <suffix> <massaged suffix>
		 *
		 * the <suffix> field must be defined as a valid suffix
		 * (or suffixAlias?) for the current database;
		 * the <massaged suffix> shouldn't have already been
		 * defined as a valid suffix or suffixAlias for the 
		 * current server
		 */
		if ( argc != 3 ) {
 			fprintf( stderr,
	"%s: line %d: syntax is \"suffixMassage <suffix> <massaged suffix>\"\n",
				fname, lineno );
			return 1;
		}

		dn.bv_val = argv[ 1 ];
		dn.bv_len = strlen( argv[ 1 ] );
		if ( dnPrettyNormal( NULL, &dn, &pvnc, &nvnc, NULL ) != LDAP_SUCCESS ) {
			fprintf( stderr, "%s: line %d: "
					"suffix '%s' is invalid\n",
					fname, lineno, argv[ 1 ] );
			return 1;
		}
		
		tmp_be = select_backend( &nvnc, 0, 0 );
		if ( tmp_be != NULL && tmp_be != be ) {
			fprintf( stderr, 
	"%s: line %d: suffix already in use by another backend in"
	" \"suffixMassage <suffix> <massaged suffix>\"\n",
				fname, lineno );
			free( pvnc.bv_val );
			free( nvnc.bv_val );
			return 1;						
		}

		dn.bv_val = argv[ 2 ];
		dn.bv_len = strlen( argv[ 2 ] );
		if ( dnPrettyNormal( NULL, &dn, &prnc, &nrnc, NULL ) != LDAP_SUCCESS ) {
			fprintf( stderr, "%s: line %d: "
					"massaged suffix '%s' is invalid\n",
					fname, lineno, argv[ 2 ] );
			free( pvnc.bv_val );
			free( nvnc.bv_val );
			return 1;
		}
	
#if 0	
		tmp_be = select_backend( &nrnc, 0, 0 );
		if ( tmp_be != NULL ) {
			fprintf( stderr,
	"%s: line %d: massaged suffix already in use by another backend in" 
	" \"suffixMassage <suffix> <massaged suffix>\"\n",
                                fname, lineno );
			free( pvnc.bv_val );
			free( nvnc.bv_val );
			free( prnc.bv_val );
			free( nrnc.bv_val );
                        return 1;
		}
#endif
		
		/*
		 * The suffix massaging is emulated by means of the
		 * rewrite capabilities
		 * FIXME: no extra rewrite capabilities should be added
		 * to the database
		 */
	 	return suffix_massage_config( li->targets[ i ]->mt_rwmap.rwm_rw,
				&pvnc, &nvnc, &prnc, &nrnc );
		
	/* rewrite stuff ... */
 	} else if ( strncasecmp( argv[ 0 ], "rewrite", 7 ) == 0 ) {
		int 		i = li->ntargets-1;

		if ( i < 0 ) {
 			if ( strcasecmp( argv[0], "rewriteEngine" ) == 0 ) {
				li->rwinfo = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
			}
			return rewrite_parse( li->rwinfo, fname, lineno,
					argc, argv ); 
		}
		
 		return rewrite_parse( li->targets[ i ]->mt_rwmap.rwm_rw,
				fname, lineno, argc, argv );

	/* objectclass/attribute mapping */
	} else if ( strcasecmp( argv[ 0 ], "map" ) == 0 ) {
		int 		i = li->ntargets-1;

		if ( i < 0 ) {
			fprintf( stderr,
	"%s: line %d: need \"uri\" directive first\n",
				fname, lineno );
			return 1;
		}

		return ldap_back_map_config( &li->targets[ i ]->mt_rwmap.rwm_oc, 
				&li->targets[ i ]->mt_rwmap.rwm_at,
				fname, lineno, argc, argv );
	/* anything else */
	} else {
		return SLAP_CONF_UNKNOWN;
	}
	return 0;
}

int
ldap_back_map_config(
		struct ldapmap	*oc_map,
		struct ldapmap	*at_map,
		const char	*fname,
		int		lineno,
		int		argc,
		char		**argv )
{
	struct ldapmap		*map;
	struct ldapmapping	*mapping;
	char			*src, *dst;
	int			is_oc = 0;

	if ( argc < 3 || argc > 4 ) {
		fprintf( stderr,
	"%s: line %d: syntax is \"map {objectclass | attribute} [<local> | *] {<foreign> | *}\"\n",
			fname, lineno );
		return 1;
	}

	if ( strcasecmp( argv[1], "objectclass" ) == 0 ) {
		map = oc_map;
		is_oc = 1;

	} else if ( strcasecmp( argv[1], "attribute" ) == 0 ) {
		map = at_map;

	} else {
		fprintf( stderr, "%s: line %d: syntax is "
			"\"map {objectclass | attribute} [<local> | *] "
			"{<foreign> | *}\"\n",
			fname, lineno );
		return 1;
	}

	if ( strcmp( argv[2], "*" ) == 0 ) {
		if ( argc < 4 || strcmp( argv[3], "*" ) == 0 ) {
			map->drop_missing = ( argc < 4 );
			return 0;
		}
		src = dst = argv[3];

	} else if ( argc < 4 ) {
		src = "";
		dst = argv[2];

	} else {
		src = argv[2];
		dst = ( strcmp( argv[3], "*" ) == 0 ? src : argv[3] );
	}

	if ( ( map == at_map )
			&& ( strcasecmp( src, "objectclass" ) == 0
			|| strcasecmp( dst, "objectclass" ) == 0 ) )
	{
		fprintf( stderr,
			"%s: line %d: objectclass attribute cannot be mapped\n",
			fname, lineno );
	}

	mapping = (struct ldapmapping *)ch_calloc( 2,
		sizeof(struct ldapmapping) );
	if ( mapping == NULL ) {
		fprintf( stderr,
			"%s: line %d: out of memory\n",
			fname, lineno );
		return 1;
	}
	ber_str2bv( src, 0, 1, &mapping->src );
	ber_str2bv( dst, 0, 1, &mapping->dst );
	mapping[1].src = mapping->dst;
	mapping[1].dst = mapping->src;

	/*
	 * schema check
	 */
	if ( is_oc ) {
		if ( src[0] != '\0' ) {
			if ( oc_bvfind( &mapping->src ) == NULL ) {
				fprintf( stderr,
	"%s: line %d: warning, source objectClass '%s' "
	"should be defined in schema\n",
					fname, lineno, src );

				/*
				 * FIXME: this should become an err
				 */
				goto error_return;
			}
		}

		if ( oc_bvfind( &mapping->dst ) == NULL ) {
			fprintf( stderr,
	"%s: line %d: warning, destination objectClass '%s' "
	"is not defined in schema\n",
				fname, lineno, dst );
		}
	} else {
		int			rc;
		const char		*text = NULL;
		AttributeDescription	*ad = NULL;

		if ( src[0] != '\0' ) {
			rc = slap_bv2ad( &mapping->src, &ad, &text );
			if ( rc != LDAP_SUCCESS ) {
				fprintf( stderr,
	"%s: line %d: warning, source attributeType '%s' "
	"should be defined in schema\n",
					fname, lineno, src );

				/*
				 * FIXME: this should become an err
				 */
				goto error_return;
			}

			ad = NULL;
		}

		rc = slap_bv2ad( &mapping->dst, &ad, &text );
		if ( rc != LDAP_SUCCESS ) {
			fprintf( stderr,
	"%s: line %d: warning, destination attributeType '%s' "
	"is not defined in schema\n",
				fname, lineno, dst );
		}
	}

	if ( (src[0] != '\0' && avl_find( map->map, (caddr_t)mapping, mapping_cmp ) != NULL)
			|| avl_find( map->remap, (caddr_t)&mapping[1], mapping_cmp ) != NULL)
	{
		fprintf( stderr,
			"%s: line %d: duplicate mapping found (ignored)\n",
			fname, lineno );
		goto error_return;
	}

	if ( src[0] != '\0' ) {
		avl_insert( &map->map, (caddr_t)mapping,
					mapping_cmp, mapping_dup );
	}
	avl_insert( &map->remap, (caddr_t)&mapping[1],
				mapping_cmp, mapping_dup );

	return 0;

error_return:;
	if ( mapping ) {
		ch_free( mapping->src.bv_val );
		ch_free( mapping->dst.bv_val );
		ch_free( mapping );
	}

	return 1;
}


#ifdef ENABLE_REWRITE
static char *
suffix_massage_regexize( const char *s )
{
	char *res, *ptr;
	const char *p, *r;
	int i;

	for ( i = 0, p = s; 
			( r = strchr( p, ',' ) ) != NULL; 
			p = r + 1, i++ )
		;

	res = ch_calloc( sizeof( char ), strlen( s ) + 4 + 4*i + 1 );

	ptr = lutil_strcopy( res, "(.*)" );
	for ( i = 0, p = s;
			( r = strchr( p, ',' ) ) != NULL;
			p = r + 1 , i++ ) {
		ptr = lutil_strncopy( ptr, p, r - p + 1 );
		ptr = lutil_strcopy( ptr, "[ ]?" );

		if ( r[ 1 ] == ' ' ) {
			r++;
		}
	}
	lutil_strcopy( ptr, p );

	return res;
}

static char *
suffix_massage_patternize( const char *s )
{
	ber_len_t	len;
	char		*res;

	len = strlen( s );

	res = ch_calloc( sizeof( char ), len + sizeof( "%1" ) );
	if ( res == NULL ) {
		return NULL;
	}

	strcpy( res, "%1" );
	strcpy( res + sizeof( "%1" ) - 1, s );

	return res;
}

int
suffix_massage_config( 
		struct rewrite_info *info,
		struct berval *pvnc,
		struct berval *nvnc,
		struct berval *prnc,
		struct berval *nrnc
)
{
	char *rargv[ 5 ];
	int line = 0;

	rargv[ 0 ] = "rewriteEngine";
	rargv[ 1 ] = "on";
	rargv[ 2 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 2, rargv );

	rargv[ 0 ] = "rewriteContext";
	rargv[ 1 ] = "default";
	rargv[ 2 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 2, rargv );

	rargv[ 0 ] = "rewriteRule";
	rargv[ 1 ] = suffix_massage_regexize( pvnc->bv_val );
	rargv[ 2 ] = suffix_massage_patternize( prnc->bv_val );
	rargv[ 3 ] = ":";
	rargv[ 4 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 4, rargv );
	ch_free( rargv[ 1 ] );
	ch_free( rargv[ 2 ] );
	
	rargv[ 0 ] = "rewriteContext";
	rargv[ 1 ] = "searchEntryDN";
	rargv[ 2 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 2, rargv );

	rargv[ 0 ] = "rewriteRule";
	rargv[ 1 ] = suffix_massage_regexize( prnc->bv_val );
	rargv[ 2 ] = suffix_massage_patternize( pvnc->bv_val );
	rargv[ 3 ] = ":";
	rargv[ 4 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 4, rargv );
	ch_free( rargv[ 1 ] );
	ch_free( rargv[ 2 ] );

	/* backward compatibility */
	rargv[ 0 ] = "rewriteContext";
	rargv[ 1 ] = "searchResult";
	rargv[ 2 ] = "alias";
	rargv[ 3 ] = "searchEntryDN";
	rargv[ 4 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 4, rargv );
	
	rargv[ 0 ] = "rewriteContext";
	rargv[ 1 ] = "matchedDN";
	rargv[ 2 ] = "alias";
	rargv[ 3 ] = "searchEntryDN";
	rargv[ 4 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 4, rargv );

	rargv[ 0 ] = "rewriteContext";
	rargv[ 1 ] = "searchAttrDN";
	rargv[ 2 ] = "alias";
	rargv[ 3 ] = "searchEntryDN";
	rargv[ 4 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 4, rargv );

	/* NOTE: this corresponds to #undef'ining RWM_REFERRAL_REWRITE;
	 * see servers/slapd/overlays/rwm.h for details */
        rargv[ 0 ] = "rewriteContext";
	rargv[ 1 ] = "referralAttrDN";
	rargv[ 2 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 2, rargv );

	rargv[ 0 ] = "rewriteContext";
	rargv[ 1 ] = "referralDN";
	rargv[ 2 ] = NULL;
	rewrite_parse( info, "<suffix massage>", ++line, 2, rargv );
	
	return 0;
}
#endif /* ENABLE_REWRITE */