Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 705 insertions, 0 deletions

diff --git a/servers/slapd/back-meta/back-meta.h b/servers/slapd/back-meta/back-meta.h
new file mode 100644
index 0000000..087111d
--- /dev/null
+++ b/servers/slapd/back-meta/back-meta.h
@@ -0,0 +1,705 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1999-2021 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.
+ */
+
+#ifndef SLAPD_LDAP_H
+#error "include servers/slapd/back-ldap/back-ldap.h before this file!"
+#endif /* SLAPD_LDAP_H */
+
+#ifndef SLAPD_META_H
+#define SLAPD_META_H
+
+#ifdef LDAP_DEVEL
+#define SLAPD_META_CLIENT_PR 1
+#endif /* LDAP_DEVEL */
+
+#include "proto-meta.h"
+
+/* String rewrite library */
+#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 */
+
+/* from back-ldap.h before rwm removal */
+struct ldapmap {
+	int drop_missing;
+
+	Avlnode *map;
+	Avlnode *remap;
+};
+
+struct ldapmapping {
+	struct berval src;
+	struct berval dst;
+};
+
+struct ldaprwmap {
+	/*
+	 * DN rewriting
+	 */
+#ifdef ENABLE_REWRITE
+	struct rewrite_info *rwm_rw;
+#else /* !ENABLE_REWRITE */
+	/* some time the suffix massaging without librewrite
+	 * will be disabled */
+	BerVarray rwm_suffix_massage;
+#endif /* !ENABLE_REWRITE */
+	BerVarray rwm_bva_rewrite;
+
+	/*
+	 * Attribute/objectClass mapping
+	 */
+	struct ldapmap rwm_oc;
+	struct ldapmap rwm_at;
+	BerVarray rwm_bva_map;
+};
+
+/* Whatever context ldap_back_dn_massage needs... */
+typedef struct dncookie {
+	struct metatarget_t	*target;
+
+#ifdef ENABLE_REWRITE
+	Connection		*conn;
+	char			*ctx;
+	SlapReply		*rs;
+#else
+	int			normalized;
+	int			tofrom;
+#endif
+} dncookie;
+
+int ldap_back_dn_massage(dncookie *dc, struct berval *dn,
+	struct berval *res);
+
+extern int ldap_back_conn_cmp( const void *c1, const void *c2);
+extern int ldap_back_conn_dup( void *c1, void *c2 );
+extern void ldap_back_conn_free( void *c );
+
+/* attributeType/objectClass mapping */
+int mapping_cmp (const void *, const void *);
+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 );
+
+int
+ldap_back_map_attrs(
+	Operation *op,
+	struct ldapmap *at_map,
+	AttributeName *a,
+	int remap,
+	char ***mapped_attrs );
+
+extern int
+ldap_back_filter_map_rewrite(
+	dncookie	*dc,
+	Filter		*f,
+	struct berval	*fstr,
+	int		remap,
+	void		*memctx );
+
+/* 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 );
+#endif /* ENABLE_REWRITE */
+extern int
+ldap_back_referral_result_rewrite(
+	dncookie	*dc,
+	BerVarray	a_vals,
+	void		*memctx );
+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 */
+
+/*
+ * 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_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 {
+	ldapconn_base_t		lc_base;
+#define	mc_base			lc_base
+#define	mc_conn			mc_base.lcb_conn
+#define	mc_local_ndn		mc_base.lcb_local_ndn
+#define	mc_refcnt		mc_base.lcb_refcnt
+#define	mc_create_time		mc_base.lcb_create_time
+#define	mc_time			mc_base.lcb_time
+	
+	LDAP_TAILQ_ENTRY(metaconn_t)	mc_q;
+
+	/* 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             	mc_authz_target;
+#define META_BOUND_NONE		(-1)
+#define META_BOUND_ALL		(-2)
+
+	struct metainfo_t	*mc_info;
+
+	/* 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 enum meta_st_t {
+#if 0 /* todo */
+	META_ST_EXACT = LDAP_SCOPE_BASE,
+#endif
+	META_ST_SUBTREE = LDAP_SCOPE_SUBTREE,
+	META_ST_SUBORDINATE = LDAP_SCOPE_SUBORDINATE,
+	META_ST_REGEX /* last + 1 */
+} meta_st_t;
+
+typedef struct metasubtree_t {
+	meta_st_t ms_type;
+	union {
+		struct berval msu_dn;
+		struct {
+			struct berval msr_regex_pattern;
+			regex_t msr_regex;
+		} msu_regex;
+	} ms_un;
+#define ms_dn ms_un.msu_dn
+#define ms_regex ms_un.msu_regex.msr_regex
+#define ms_regex_pattern ms_un.msu_regex.msr_regex_pattern
+
+	struct metasubtree_t *ms_next;
+} metasubtree_t;
+
+typedef struct metafilter_t {
+	struct metafilter_t *mf_next;
+	struct berval mf_regex_pattern;
+	regex_t mf_regex;
+} metafilter_t;
+
+typedef struct metacommon_t {
+	int				mc_version;
+	int				mc_nretries;
+#define META_RETRY_UNDEFINED	(-2)
+#define META_RETRY_FOREVER	(-1)
+#define META_RETRY_NEVER	(0)
+#define META_RETRY_DEFAULT	(10)
+
+	unsigned		mc_flags;
+#define	META_BACK_CMN_ISSET(mc,f)		( ( (mc)->mc_flags & (f) ) == (f) )
+#define	META_BACK_CMN_QUARANTINE(mc)		META_BACK_CMN_ISSET( (mc), LDAP_BACK_F_QUARANTINE )
+#define	META_BACK_CMN_CHASE_REFERRALS(mc)	META_BACK_CMN_ISSET( (mc), LDAP_BACK_F_CHASE_REFERRALS )
+#define	META_BACK_CMN_NOREFS(mc)		META_BACK_CMN_ISSET( (mc), LDAP_BACK_F_NOREFS )
+#define	META_BACK_CMN_NOUNDEFFILTER(mc)		META_BACK_CMN_ISSET( (mc), LDAP_BACK_F_NOUNDEFFILTER )
+#define	META_BACK_CMN_SAVECRED(mc)		META_BACK_CMN_ISSET( (mc), LDAP_BACK_F_SAVECRED )
+#define	META_BACK_CMN_ST_REQUEST(mc)		META_BACK_CMN_ISSET( (mc), LDAP_BACK_F_ST_REQUEST )
+
+#ifdef SLAPD_META_CLIENT_PR
+	/*
+	 * client-side paged results:
+	 * -1: accept unsolicited paged results responses
+	 *  0: off
+	 * >0: always request paged results with size == mt_ps
+	 */
+#define META_CLIENT_PR_DISABLE			(0)
+#define META_CLIENT_PR_ACCEPT_UNSOLICITED	(-1)
+	ber_int_t		mc_ps;
+#endif /* SLAPD_META_CLIENT_PR */
+
+	slap_retry_info_t	mc_quarantine;
+	time_t			mc_network_timeout;
+	struct timeval	mc_bind_timeout;
+#define META_BIND_TIMEOUT	LDAP_BACK_RESULT_UTIMEOUT
+	time_t			mc_timeout[ SLAP_OP_LAST ];
+} metacommon_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;
+	LDAP_URLLIST_PROC	*mt_urllist_f;
+	void			*mt_urllist_p;
+
+	metafilter_t	*mt_filter;
+	metasubtree_t		*mt_subtree;
+	/* F: subtree-include; T: subtree-exclude */
+	int			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;
+
+	/* we only care about the TLS options here */
+	slap_bindconf		mt_tls;
+
+	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
+
+	struct ldaprwmap	mt_rwmap;
+
+	sig_atomic_t		mt_isquarantined;
+	ldap_pvt_thread_mutex_t	mt_quarantine_mutex;
+
+	metacommon_t	mt_mc;
+#define	mt_nretries	mt_mc.mc_nretries
+#define	mt_flags	mt_mc.mc_flags
+#define	mt_version	mt_mc.mc_version
+#define	mt_ps		mt_mc.mc_ps
+#define	mt_network_timeout	mt_mc.mc_network_timeout
+#define	mt_bind_timeout	mt_mc.mc_bind_timeout
+#define	mt_timeout	mt_mc.mc_timeout
+#define	mt_quarantine	mt_mc.mc_quarantine
+
+#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_SAVECRED(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_SAVECRED )
+
+#define META_BACK_TGT_USE_TLS(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_USE_TLS )
+#define META_BACK_TGT_PROPAGATE_TLS(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_PROPAGATE_TLS )
+#define META_BACK_TGT_TLS_CRITICAL(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_TLS_CRITICAL )
+
+#define META_BACK_TGT_CHASE_REFERRALS(mt)	META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_CHASE_REFERRALS )
+
+#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 )
+
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+#define	META_BACK_TGT_ST_REQUEST(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_ST_REQUEST )
+#define	META_BACK_TGT_ST_RESPONSE(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_ST_RESPONSE )
+#endif /* SLAP_CONTROL_X_SESSION_TRACKING */
+
+#define	META_BACK_TGT_NOREFS(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_NOREFS )
+#define	META_BACK_TGT_NOUNDEFFILTER(mt)		META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_NOUNDEFFILTER )
+
+	slap_mask_t		mt_rep_flags;
+
+} metatarget_t;
+
+typedef struct metadncache_t {
+	ldap_pvt_thread_mutex_t mutex;
+	Avlnode			*tree;
+
+#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;
+
+/*
+ * 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)
+
+#define	mi_nretries	mi_mc.mc_nretries
+#define	mi_flags	mi_mc.mc_flags
+#define	mi_version	mi_mc.mc_version
+#define	mi_ps		mi_mc.mc_ps
+#define	mi_network_timeout	mi_mc.mc_network_timeout
+#define	mi_bind_timeout	mi_mc.mc_bind_timeout
+#define	mi_timeout	mi_mc.mc_timeout
+#define	mi_quarantine	mi_mc.mc_quarantine
+
+	metatarget_t		**mi_targets;
+	metacandidates_t	*mi_candidates;
+
+	LDAP_REBIND_PROC	*mi_rebind_f;
+	LDAP_URLLIST_PROC	*mi_urllist_f;
+
+	metadncache_t		mi_cache;
+	
+	/* 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 */
+	meta_back_quarantine_f	mi_quarantine_f;
+	void			*mi_quarantine_p;
+
+#define	li_flags		mi_flags
+/* uses flags as defined in <back-ldap/back-ldap.h> */
+#define	META_BACK_F_ONERR_STOP		LDAP_BACK_F_ONERR_STOP
+#define	META_BACK_F_ONERR_REPORT	(0x02000000U)
+#define	META_BACK_F_ONERR_MASK		(META_BACK_F_ONERR_STOP|META_BACK_F_ONERR_REPORT)
+#define	META_BACK_F_DEFER_ROOTDN_BIND	(0x04000000U)
+#define	META_BACK_F_PROXYAUTHZ_ALWAYS	(0x08000000U)	/* users always proxyauthz */
+#define	META_BACK_F_PROXYAUTHZ_ANON	(0x10000000U)	/* anonymous always proxyauthz */
+#define	META_BACK_F_PROXYAUTHZ_NOANON	(0x20000000U)	/* 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 )
+
+	time_t			mi_conn_ttl;
+	time_t			mi_idle_timeout;
+
+	metacommon_t	mi_mc;
+	ldap_extra_t	*mi_ldap_extra;
+
+} metainfo_t;
+
+typedef enum meta_op_type {
+	META_OP_ALLOW_MULTIPLE = 0,
+	META_OP_REQUIRE_SINGLE,
+	META_OP_REQUIRE_ALL
+} meta_op_type;
+
+SlapReply *
+meta_back_candidates_get( Operation *op );
+
+extern metaconn_t *
+meta_back_getconn(
+	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_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_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(
+	metaconn_t		*mc,
+	Operation		*op,
+	SlapReply		*rs,
+	int			candidate,
+	ber_int_t		msgid,
+	time_t			timeout,
+	ldap_back_send_t	sendok );
+
+extern int
+meta_back_controls_add(
+	Operation	*op,
+	SlapReply	*rs,
+	metaconn_t	*mc,
+	int		candidate,
+	LDAPControl	***pctrls );
+
+extern int
+back_meta_LTX_init_module(
+	int			argc,
+	char			*argv[] );
+
+extern int
+meta_back_conn_cmp(
+	const void		*c1,
+	const void		*c2 );
+
+extern int
+meta_back_conndn_cmp(
+	const void		*c1,
+	const void		*c2 );
+
+extern int
+meta_back_conndn_dup(
+	void			*c1,
+	void			*c2 );
+
+/*
+ * Candidate stuff
+ */
+extern int
+meta_back_is_candidate(
+	metatarget_t		*mt,
+	struct berval		*ndn,
+	int			scope );
+
+extern int
+meta_back_select_unique_candidate(
+	metainfo_t		*mi,
+	struct berval		*ndn );
+
+extern int
+meta_clear_unused_candidates(
+	Operation		*op,
+	int			candidate );
+
+extern int
+meta_clear_one_candidate(
+	Operation		*op,
+	metaconn_t		*mc,
+	int			candidate );
+
+/*
+ * Dn cache stuff (experimental)
+ */
+extern int
+meta_dncache_cmp(
+	const void		*c1,
+	const void		*c2 );
+
+extern int
+meta_dncache_dup(
+	void			*c1,
+	void			*c2 );
+
+#define META_TARGET_NONE	(-1)
+#define META_TARGET_MULTIPLE	(-2)
+extern int
+meta_dncache_get_target(
+	metadncache_t		*cache,
+	struct berval		*ndn );
+
+extern int
+meta_dncache_update_entry(
+	metadncache_t		*cache,
+	struct berval		*ndn,
+	int			target );
+
+extern int
+meta_dncache_delete_entry(
+	metadncache_t		*cache,
+	struct berval		*ndn );
+
+extern void
+meta_dncache_free( void *entry );
+
+extern void
+meta_back_map_free( struct ldapmap *lm );
+
+extern int
+meta_subtree_destroy( metasubtree_t *ms );
+
+extern void
+meta_filter_destroy( metafilter_t *mf );
+
+extern int
+meta_target_finish( metainfo_t *mi, metatarget_t *mt,
+	const char *log, char *msg, size_t msize
+);
+
+extern LDAP_REBIND_PROC		meta_back_default_rebind;
+extern LDAP_URLLIST_PROC	meta_back_default_urllist;
+
+LDAP_END_DECL
+
+#endif /* SLAPD_META_H */
+