--- servers/slapd/back-meta/back-meta.h	2004/11/13 13:45:18	1.23
+++ servers/slapd/back-meta/back-meta.h	2007/01/27 23:56:43	1.23.2.22
@@ -1,7 +1,7 @@
-/* $OpenLDAP: pkg/ldap/servers/slapd/back-meta/back-meta.h,v 1.22 2004/11/10 23:40:51 ando Exp $ */
+/* $OpenLDAP: pkg/ldap/servers/slapd/back-meta/back-meta.h,v 1.23.2.21 2007/01/13 11:19:07 ando Exp $ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1999-2004 The OpenLDAP Foundation.
+ * Copyright 1999-2007 The OpenLDAP Foundation.
  * Portions Copyright 2001-2003 Pierangelo Masarati.
  * Portions Copyright 1999-2003 Howard Chu.
  * All rights reserved.
@@ -33,6 +33,13 @@
 #include "rewrite.h"
 LDAP_BEGIN_DECL
 
+/*
+ * Set META_BACK_PRINT_CONNTREE larger than 0 to dump the connection tree (debug only)
+ */
+#ifndef META_BACK_PRINT_CONNTREE
+#define META_BACK_PRINT_CONNTREE 0
+#endif /* !META_BACK_PRINT_CONNTREE */
+
 struct slap_conn;
 struct slap_op;
 
@@ -70,27 +77,18 @@ struct ldaprwmap {
 
 /* Whatever context ldap_back_dn_massage needs... */
 typedef struct dncookie {
-	struct ldaprwmap *rwmap;
+	struct metatarget_t	*target;
 
 #ifdef ENABLE_REWRITE
-	Connection *conn;
-	char *ctx;
-	SlapReply *rs;
+	Connection		*conn;
+	char			*ctx;
+	SlapReply		*rs;
 #else
-	int normalized;
-	int tofrom;
+	int			normalized;
+	int			tofrom;
 #endif
 } dncookie;
 
-int ldap_back_freeconn( Operation *op, struct ldapconn *lc );
-struct ldapconn *ldap_back_getconn(struct slap_op *op, struct slap_rep *rs);
-int ldap_back_dobind(struct ldapconn *lc, Operation *op, SlapReply *rs);
-int ldap_back_retry(struct ldapconn *lc, Operation *op, SlapReply *rs);
-int ldap_back_map_result(SlapReply *rs);
-int ldap_back_op_result(struct ldapconn *lc, Operation *op, SlapReply *rs,
-	ber_int_t msgid, int sendok);
-int	back_ldap_LTX_init_module(int argc, char *argv[]);
-
 int ldap_back_dn_massage(dncookie *dc, struct berval *dn,
 	struct berval *res);
 
@@ -103,258 +101,484 @@ int mapping_cmp (const void *, const voi
 int mapping_dup (void *, void *);
 
 void ldap_back_map_init ( struct ldapmap *lm, struct ldapmapping ** );
+int ldap_back_mapping ( struct ldapmap *map, struct berval *s,
+	struct ldapmapping **m, int remap );
 void ldap_back_map ( struct ldapmap *map, struct berval *s, struct berval *m,
 	int remap );
 #define BACKLDAP_MAP	0
 #define BACKLDAP_REMAP	1
 char *
 ldap_back_map_filter(
-		struct ldapmap *at_map,
-		struct ldapmap *oc_map,
-		struct berval *f,
-		int remap
-);
+	struct ldapmap *at_map,
+	struct ldapmap *oc_map,
+	struct berval *f,
+	int remap );
 
 int
 ldap_back_map_attrs(
-		struct ldapmap *at_map,
-		AttributeName *a,
-		int remap,
-		char ***mapped_attrs
-);
+	struct ldapmap *at_map,
+	AttributeName *a,
+	int remap,
+	char ***mapped_attrs );
 
 extern int ldap_back_map_config(
-		struct ldapmap	*oc_map,
-		struct ldapmap	*at_map,
-		const char	*fname,
-		int		lineno,
-		int		argc,
-		char		**argv );
+	struct ldapmap	*oc_map,
+	struct ldapmap	*at_map,
+	const char	*fname,
+	int		lineno,
+	int		argc,
+	char		**argv );
 
 extern int
 ldap_back_filter_map_rewrite(
-		dncookie		*dc,
-		Filter			*f,
-		struct berval		*fstr,
-		int			remap );
+	dncookie	*dc,
+	Filter		*f,
+	struct berval	*fstr,
+	int		remap );
 
 /* suffix massaging by means of librewrite */
 #ifdef ENABLE_REWRITE
-extern int suffix_massage_config( struct rewrite_info *info,
-		struct berval *pvnc, struct berval *nvnc,
-		struct berval *prnc, struct berval *nrnc);
+extern int
+suffix_massage_config( struct rewrite_info *info,
+	struct berval *pvnc,
+	struct berval *nvnc,
+	struct berval *prnc,
+	struct berval *nrnc );
 #endif /* ENABLE_REWRITE */
-extern int ldap_dnattr_rewrite( dncookie *dc, BerVarray a_vals );
-extern int ldap_dnattr_result_rewrite( dncookie *dc, BerVarray a_vals );
+extern int
+ldap_back_referral_result_rewrite(
+	dncookie	*dc,
+	BerVarray	a_vals );
+extern int
+ldap_dnattr_rewrite(
+	dncookie	*dc,
+	BerVarray	a_vals );
+extern int
+ldap_dnattr_result_rewrite(
+	dncookie	*dc,
+	BerVarray	a_vals );
 
 /* (end of) from back-ldap.h before rwm removal */
 
-struct metasingleconn {
-	int			candidate;
-#define	META_NOT_CANDIDATE	0
-#define	META_CANDIDATE		1
-#define	META_LAST_CONN		-1
-	
-	LDAP            	*ld;
-	struct berval          	bound_dn;
-	struct berval		cred;
-	int             	bound;
-#define META_UNBOUND		0
-#define META_BOUND		1
-#define META_ANONYMOUS		2
-};
+/*
+ * A metasingleconn_t can be in the following, mutually exclusive states:
+ *
+ *	- none			(0x0U)
+ *	- creating		META_BACK_FCONN_CREATING
+ *	- initialized		META_BACK_FCONN_INITED
+ *	- binding		LDAP_BACK_FCONN_BINDING
+ *	- bound/anonymous	LDAP_BACK_FCONN_ISBOUND/LDAP_BACK_FCONN_ISANON
+ *
+ * possible modifiers are:
+ *
+ *	- privileged		LDAP_BACK_FCONN_ISPRIV
+ *	- privileged, TLS	LDAP_BACK_FCONN_ISTLS
+ *	- subjected to idassert	LDAP_BACK_FCONN_ISIDASR
+ *	- tainted		LDAP_BACK_FCONN_TAINTED
+ */
+
+#define META_BACK_FCONN_INITED		(0x00100000U)
+#define META_BACK_FCONN_CREATING	(0x00200000U)
 
-#define META_LAST(lsc)		((lsc)->candidate == META_LAST_CONN)
+#define	META_BACK_CONN_INITED(lc)		LDAP_BACK_CONN_ISSET((lc), META_BACK_FCONN_INITED)
+#define	META_BACK_CONN_INITED_SET(lc)		LDAP_BACK_CONN_SET((lc), META_BACK_FCONN_INITED)
+#define	META_BACK_CONN_INITED_CLEAR(lc)		LDAP_BACK_CONN_CLEAR((lc), META_BACK_FCONN_INITED)
+#define	META_BACK_CONN_INITED_CPY(lc, mlc)	LDAP_BACK_CONN_CPY((lc), META_BACK_FCONN_INITED, (mlc))
+#define	META_BACK_CONN_CREATING(lc)		LDAP_BACK_CONN_ISSET((lc), META_BACK_FCONN_CREATING)
+#define	META_BACK_CONN_CREATING_SET(lc)		LDAP_BACK_CONN_SET((lc), META_BACK_FCONN_CREATING)
+#define	META_BACK_CONN_CREATING_CLEAR(lc)	LDAP_BACK_CONN_CLEAR((lc), META_BACK_FCONN_CREATING)
+#define	META_BACK_CONN_CREATING_CPY(lc, mlc)	LDAP_BACK_CONN_CPY((lc), META_BACK_FCONN_CREATING, (mlc))
+
+struct metainfo_t;
+
+#define	META_NOT_CANDIDATE		((ber_tag_t)0x0)
+#define	META_CANDIDATE			((ber_tag_t)0x1)
+#define	META_BINDING			((ber_tag_t)0x2)
+#define	META_RETRYING			((ber_tag_t)0x4)
+
+typedef struct metasingleconn_t {
+#define META_CND_ISSET(rs,f)		( ( (rs)->sr_tag & (f) ) == (f) )
+#define META_CND_SET(rs,f)		( (rs)->sr_tag |= (f) )
+#define META_CND_CLEAR(rs,f)		( (rs)->sr_tag &= ~(f) )
+
+#define META_CANDIDATE_RESET(rs)	( (rs)->sr_tag = 0 )
+#define META_IS_CANDIDATE(rs)		META_CND_ISSET( (rs), META_CANDIDATE )
+#define META_CANDIDATE_SET(rs)		META_CND_SET( (rs), META_CANDIDATE )
+#define META_CANDIDATE_CLEAR(rs)	META_CND_CLEAR( (rs), META_CANDIDATE )
+#define META_IS_BINDING(rs)		META_CND_ISSET( (rs), META_BINDING )
+#define META_BINDING_SET(rs)		META_CND_SET( (rs), META_BINDING )
+#define META_BINDING_CLEAR(rs)		META_CND_CLEAR( (rs), META_BINDING )
+#define META_IS_RETRYING(rs)		META_CND_ISSET( (rs), META_RETRYING )
+#define META_RETRYING_SET(rs)		META_CND_SET( (rs), META_RETRYING )
+#define META_RETRYING_CLEAR(rs)		META_CND_CLEAR( (rs), META_RETRYING )
+	
+	LDAP            	*msc_ld;
+	time_t			msc_time;
+	struct berval          	msc_bound_ndn;
+	struct berval		msc_cred;
+	unsigned		msc_mscflags;
+	/* NOTE: lc_lcflags is redefined to msc_mscflags to reuse the macros
+	 * defined for back-ldap */
+#define	lc_lcflags		msc_mscflags
+} metasingleconn_t;
+
+typedef struct metaconn_t {
+	struct slap_conn	*mc_conn;
+#define	lc_conn			mc_conn
+	unsigned		mc_refcnt;
 
-struct metaconn {
-	struct slap_conn	*conn;
-	struct rewrite_info	*rwinfo;
+	time_t			mc_create_time;
+	time_t			mc_time;
 	
+	struct berval          	mc_local_ndn;
+	/* NOTE: msc_mscflags is used to recycle the #define
+	 * in metasingleconn_t */
+	unsigned		msc_mscflags;
+
 	/*
 	 * means that the connection is bound; 
 	 * of course only one target actually is ...
 	 */
-	int             bound_target;
-#define META_BOUND_NONE		-1
-#define META_BOUND_ALL		-2
-	/* supersedes the connection stuff */
-	struct metasingleconn *conns;
-};
+	int             	mc_authz_target;
+#define META_BOUND_NONE		(-1)
+#define META_BOUND_ALL		(-2)
 
-struct metatarget {
-	char			*uri;
-	struct berval		psuffix;	/* pretty suffix */
-	struct berval		suffix;		/* normalized suffix */
-	struct berval		binddn;
-	struct berval		bindpw;
+	struct metainfo_t	*mc_info;
 
-	struct berval           pseudorootdn;
-	struct berval           pseudorootpw;
+	LDAP_TAILQ_ENTRY(metaconn_t)	mc_q;
 
-#if 0
-	struct rewrite_info	*rwinfo;
-
-	struct ldapmap		oc_map;
-	struct ldapmap		at_map;
-#endif
-	struct ldaprwmap	rwmap;
-};
+	/* supersedes the connection stuff */
+	metasingleconn_t	mc_conns[ 1 ];
+	/* NOTE: mc_conns must be last, because
+	 * the required number of conns is malloc'ed
+	 * in one block with the metaconn_t structure */
+} metaconn_t;
+
+typedef struct metatarget_t {
+	char			*mt_uri;
+	ldap_pvt_thread_mutex_t	mt_uri_mutex;
+
+	/* TODO: we might want to enable different strategies
+	 * for different targets */
+	LDAP_REBIND_PROC	*mt_rebind_f;
+	void			*mt_urllist_p;
+
+	BerVarray		mt_subtree_exclude;
+	int			mt_scope;
+
+	struct berval		mt_psuffix;		/* pretty suffix */
+	struct berval		mt_nsuffix;		/* normalized suffix */
+
+	struct berval		mt_binddn;
+	struct berval		mt_bindpw;
+
+	slap_idassert_t		mt_idassert;
+#define	mt_idassert_mode	mt_idassert.si_mode
+#define	mt_idassert_authcID	mt_idassert.si_bc.sb_authcId
+#define	mt_idassert_authcDN	mt_idassert.si_bc.sb_binddn
+#define	mt_idassert_passwd	mt_idassert.si_bc.sb_cred
+#define	mt_idassert_authzID	mt_idassert.si_bc.sb_authzId
+#define	mt_idassert_authmethod	mt_idassert.si_bc.sb_method
+#define	mt_idassert_sasl_mech	mt_idassert.si_bc.sb_saslmech
+#define	mt_idassert_sasl_realm	mt_idassert.si_bc.sb_realm
+#define	mt_idassert_secprops	mt_idassert.si_bc.sb_secprops
+#define	mt_idassert_tls		mt_idassert.si_bc.sb_tls
+#define	mt_idassert_flags	mt_idassert.si_flags
+#define	mt_idassert_authz	mt_idassert.si_authz
+
+	int			mt_nretries;
+#define META_RETRY_UNDEFINED	(-2)
+#define META_RETRY_FOREVER	(-1)
+#define META_RETRY_NEVER	(0)
+#define META_RETRY_DEFAULT	(10)
+
+	struct ldaprwmap	mt_rwmap;
+
+	sig_atomic_t		mt_isquarantined;
+	slap_retry_info_t	mt_quarantine;
+	ldap_pvt_thread_mutex_t	mt_quarantine_mutex;
+
+	unsigned		mt_flags;
+#define	META_BACK_TGT_ISSET(mt,f)		( ( (mt)->mt_flags & (f) ) == (f) )
+#define	META_BACK_TGT_ISMASK(mt,m,f)		( ( (mt)->mt_flags & (m) ) == (f) )
+
+#define	META_BACK_TGT_T_F(mt)			META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_T_F_MASK, LDAP_BACK_F_T_F )
+#define	META_BACK_TGT_T_F_DISCOVER(mt)		META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_T_F_MASK2, LDAP_BACK_F_T_F_DISCOVER )
+
+#define	META_BACK_TGT_ABANDON(mt)		META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK, LDAP_BACK_F_CANCEL_ABANDON )
+#define	META_BACK_TGT_IGNORE(mt)		META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK, LDAP_BACK_F_CANCEL_IGNORE )
+#define	META_BACK_TGT_CANCEL(mt)		META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK, LDAP_BACK_F_CANCEL_EXOP )
+#define	META_BACK_TGT_CANCEL_DISCOVER(mt)	META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK2, LDAP_BACK_F_CANCEL_EXOP_DISCOVER )
+#define	META_BACK_TGT_QUARANTINE(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_QUARANTINE )
+
+	int			mt_version;
+	time_t			mt_network_timeout;
+	struct timeval		mt_bind_timeout;
+#define META_BIND_TIMEOUT	LDAP_BACK_RESULT_UTIMEOUT
+	time_t			mt_timeout[ SLAP_OP_LAST ];
+} metatarget_t;
 
-struct metadncache {
+typedef struct metadncache_t {
 	ldap_pvt_thread_mutex_t mutex;
 	Avlnode			*tree;
 
-#define META_DNCACHE_DISABLED   0
-#define META_DNCACHE_FOREVER    -1
-	long int		ttl;  /* seconds; 0: no cache, -1: no expiry */
-};
+#define META_DNCACHE_DISABLED   (0)
+#define META_DNCACHE_FOREVER    ((time_t)(-1))
+	time_t			ttl;  /* seconds; 0: no cache, -1: no expiry */
+} metadncache_t;
+
+typedef struct metacandidates_t {
+	int			mc_ntargets;
+	SlapReply		*mc_candidates;
+} metacandidates_t;
 
-struct metainfo {
-	int			ntargets;
-	int			defaulttarget;
-	int			network_timeout;
-#define META_DEFAULT_TARGET_NONE	-1
-	struct metatarget	**targets;
+/*
+ * Hook to allow mucking with metainfo_t/metatarget_t when quarantine is over
+ */
+typedef int (*meta_back_quarantine_f)( struct metainfo_t *, int target, void * );
+
+typedef struct metainfo_t {
+	int			mi_ntargets;
+	int			mi_defaulttarget;
+#define META_DEFAULT_TARGET_NONE	(-1)
+	int			mi_nretries;
+
+	metatarget_t		**mi_targets;
+	metacandidates_t	*mi_candidates;
 
-	struct rewrite_info	*rwinfo;
-	Backend			*glue_be; 
+	LDAP_REBIND_PROC	*mi_rebind_f;
 
-	struct metadncache	cache;
+	metadncache_t		mi_cache;
 	
-	ldap_pvt_thread_mutex_t	conn_mutex;
-	Avlnode			*conntree;
+	/* cached connections; 
+	 * special conns are in tailq rather than in tree */
+	ldap_avl_info_t		mi_conninfo;
+	struct {
+		int						mic_num;
+		LDAP_TAILQ_HEAD(mc_conn_priv_q, metaconn_t)	mic_priv;
+	}			mi_conn_priv[ LDAP_BACK_PCONN_LAST ];
+	int			mi_conn_priv_max;
+
+	/* NOTE: quarantine uses the connection mutex */
+	slap_retry_info_t	mi_quarantine;
+	meta_back_quarantine_f	mi_quarantine_f;
+	void			*mi_quarantine_p;
+
+	unsigned		mi_flags;
+#define	li_flags		mi_flags
+/* uses flags as defined in <back-ldap/back-ldap.h> */
+#define	META_BACK_F_ONERR_STOP		(0x00100000U)
+#define	META_BACK_F_ONERR_REPORT	(0x00200000U)
+#define	META_BACK_F_ONERR_MASK		(META_BACK_F_ONERR_STOP|META_BACK_F_ONERR_REPORT)
+#define	META_BACK_F_DEFER_ROOTDN_BIND	(0x00400000U)
+#define	META_BACK_F_PROXYAUTHZ_ALWAYS	(0x00800000U)	/* users always proxyauthz */
+#define	META_BACK_F_PROXYAUTHZ_ANON	(0x01000000U)	/* anonymous always proxyauthz */
+#define	META_BACK_F_PROXYAUTHZ_NOANON	(0x02000000U)	/* anonymous remains anonymous */
+
+#define	META_BACK_ONERR_STOP(mi)	LDAP_BACK_ISSET( (mi), META_BACK_F_ONERR_STOP )
+#define	META_BACK_ONERR_REPORT(mi)	LDAP_BACK_ISSET( (mi), META_BACK_F_ONERR_REPORT )
+#define	META_BACK_ONERR_CONTINUE(mi)	( !LDAP_BACK_ISSET( (mi), META_BACK_F_ONERR_MASK ) )
+
+#define META_BACK_DEFER_ROOTDN_BIND(mi)	LDAP_BACK_ISSET( (mi), META_BACK_F_DEFER_ROOTDN_BIND )
+#define META_BACK_PROXYAUTHZ_ALWAYS(mi)	LDAP_BACK_ISSET( (mi), META_BACK_F_PROXYAUTHZ_ALWAYS )
+#define META_BACK_PROXYAUTHZ_ANON(mi)	LDAP_BACK_ISSET( (mi), META_BACK_F_PROXYAUTHZ_ANON )
+#define META_BACK_PROXYAUTHZ_NOANON(mi)	LDAP_BACK_ISSET( (mi), META_BACK_F_PROXYAUTHZ_NOANON )
+
+#define META_BACK_QUARANTINE(mi)	LDAP_BACK_ISSET( (mi), LDAP_BACK_F_QUARANTINE )
+
+	int			mi_version;
+	time_t			mi_network_timeout;
+	time_t			mi_conn_ttl;
+	time_t			mi_idle_timeout;
+	struct timeval		mi_bind_timeout;
+	time_t			mi_timeout[ SLAP_OP_LAST ];
+} metainfo_t;
+
+typedef enum meta_op_type {
+	META_OP_ALLOW_MULTIPLE = 0,
+	META_OP_REQUIRE_SINGLE,
+	META_OP_REQUIRE_ALL
+} meta_op_type;
 
-	int			savecred;
-};
+SlapReply *
+meta_back_candidates_get( Operation *op );
 
-#define META_OP_ALLOW_MULTIPLE		0x00
-#define META_OP_REQUIRE_SINGLE		0x01
-#define META_OP_REQUIRE_ALL		0x02
-extern struct metaconn *
+extern metaconn_t *
 meta_back_getconn(
-		Operation		*op,
-		SlapReply		*rs,
-		int			op_type,
-		struct berval		*dn,
-		int			*candidate
-);
+	Operation		*op,
+	SlapReply		*rs,
+	int			*candidate,
+	ldap_back_send_t	sendok );
+
+extern void
+meta_back_release_conn_lock(
+       	metainfo_t		*mi,
+	metaconn_t		*mc,
+	int			dolock );
+#define meta_back_release_conn(mi, mc)	meta_back_release_conn_lock( (mi), (mc), 1 )
 
 extern int
-meta_back_dobind(
-		struct metaconn		*lc,
-		Operation		*op
-);
+meta_back_retry(
+	Operation		*op,
+	SlapReply		*rs,
+	metaconn_t		**mcp,
+	int			candidate,
+	ldap_back_send_t	sendok );
+
+extern void
+meta_back_conn_free(
+	void			*v_mc );
+
+#if META_BACK_PRINT_CONNTREE > 0
+extern void
+meta_back_print_conntree(
+	metainfo_t		*mi,
+	char			*msg );
+#endif
 
 extern int
-meta_back_is_valid(
-		struct metaconn 	*lc, 
-		int 			candidate 
-);
+meta_back_init_one_conn(
+	Operation		*op,
+	SlapReply		*rs,
+	metaconn_t		*mc,
+	int			candidate,
+	int			ispriv,
+	ldap_back_send_t	sendok,
+	int			dolock );
+
+extern void
+meta_back_quarantine(
+	Operation		*op,
+	SlapReply		*rs,
+	int			candidate );
+
+extern int
+meta_back_dobind(
+	Operation		*op,
+	SlapReply		*rs,
+	metaconn_t		*mc,
+	ldap_back_send_t	sendok );
+
+extern int
+meta_back_single_dobind(
+	Operation		*op,
+	SlapReply		*rs,
+	metaconn_t		**mcp,
+	int			candidate,
+	ldap_back_send_t	sendok,
+	int			retries,
+	int			dolock );
+
+extern int
+meta_back_proxy_authz_cred(
+	metaconn_t		*mc,
+	int			candidate,
+	Operation		*op,
+	SlapReply		*rs,
+	ldap_back_send_t	sendok,
+	struct berval		*binddn,
+	struct berval		*bindcred,
+	int			*method );
+
+extern int
+meta_back_cancel(
+	metaconn_t		*mc,
+	Operation		*op,
+	SlapReply		*rs,
+	ber_int_t		msgid,
+	int			candidate,
+	ldap_back_send_t	sendok );
 
 extern int
 meta_back_op_result(
-		struct metaconn		*lc,
-		Operation		*op,
-		SlapReply		*rs
-);
+	metaconn_t		*mc,
+	Operation		*op,
+	SlapReply		*rs,
+	int			candidate,
+	ber_int_t		msgid,
+	time_t			timeout,
+	ldap_back_send_t	sendok );
 
 extern int
 back_meta_LTX_init_module(
-		int			argc,
-		char			*argv[]
-);
+	int			argc,
+	char			*argv[] );
 
 extern int
 meta_back_conn_cmp(
-		const void		*c1,
-		const void		*c2
-);
+	const void		*c1,
+	const void		*c2 );
+
+extern int
+meta_back_conndn_cmp(
+	const void		*c1,
+	const void		*c2 );
 
 extern int
-meta_back_conn_dup(
-		void			*c1,
-		void			*c2
-);
+meta_back_conndn_dup(
+	void			*c1,
+	void			*c2 );
 
 /*
  * Candidate stuff
  */
 extern int
 meta_back_is_candidate(
-		struct berval		*nsuffix,
-		struct berval		*ndn
-);
-
-extern int
-meta_back_count_candidates(
-		struct metainfo		*li,
-		struct berval		*ndn
-);
-
-extern int
-meta_back_is_candidate_unique(
-		struct metainfo		*li,
-		struct berval		*ndn
-);
+	metatarget_t		*mt,
+	struct berval		*ndn,
+	int			scope );
 
 extern int
 meta_back_select_unique_candidate(
-		struct metainfo		*li,
-		struct berval		*ndn
-);
+	metainfo_t		*mi,
+	struct berval		*ndn );
 
 extern int
 meta_clear_unused_candidates(
-		struct metainfo		*li,
-		struct metaconn		*lc,
-		int			candidate,
-		int			reallyclean
-);
+	Operation		*op,
+	int			candidate );
 
 extern int
 meta_clear_one_candidate(
-		struct metasingleconn	*lc,
-		int			reallyclean
-);
+	Operation		*op,
+	metaconn_t		*mc,
+	int			candidate );
 
 /*
  * Dn cache stuff (experimental)
  */
 extern int
 meta_dncache_cmp(
-		const void		*c1,
-		const void		*c2
-);
+	const void		*c1,
+	const void		*c2 );
 
 extern int
 meta_dncache_dup(
-		void			*c1,
-		void			*c2
-);
+	void			*c1,
+	void			*c2 );
 
+#define META_TARGET_NONE	(-1)
+#define META_TARGET_MULTIPLE	(-2)
 extern int
 meta_dncache_get_target(
-		struct metadncache	*cache,
-		struct berval		*ndn
-);
+	metadncache_t		*cache,
+	struct berval		*ndn );
 
 extern int
 meta_dncache_update_entry(
-		struct metadncache	*cache,
-		struct berval		*ndn,
-		int			target
-);
+	metadncache_t		*cache,
+	struct berval		*ndn,
+	int			target );
 
 extern int
 meta_dncache_delete_entry(
-		struct metadncache	*cache,
-		struct berval		*ndn
-);
+	metadncache_t		*cache,
+	struct berval		*ndn );
 
 extern void
-meta_dncache_free(
-		void *entry
-);
+meta_dncache_free( void *entry );
+
+extern LDAP_REBIND_PROC		meta_back_default_rebind;
 
 LDAP_END_DECL