/* $OpenLDAP$ */
/* 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.
 */

#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

#include "proto-meta.h"

/* String rewrite library */
#include "rewrite.h"
LDAP_BEGIN_DECL

struct slap_conn;
struct slap_op;

/* 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 */

	/*
	 * Attribute/objectClass mapping
	 */
	struct ldapmap rwm_oc;
	struct ldapmap rwm_at;
};

/* Whatever context ldap_back_dn_massage needs... */
typedef struct dncookie {
	struct ldaprwmap *rwmap;

#ifdef ENABLE_REWRITE
	Connection *conn;
	char *ctx;
	SlapReply *rs;
#else
	int normalized;
	int tofrom;
#endif
} dncookie;

#define META_BIND_NRETRIES	3
#define META_BIND_TIMEOUT	1000

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(
		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 );

extern int
ldap_back_filter_map_rewrite(
		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);
#endif /* ENABLE_REWRITE */
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			msc_candidate;
#define	META_NOT_CANDIDATE	((char)0)
#define	META_CANDIDATE		((char)1)
#define	META_LAST_CONN		((char)(-1))
	
	LDAP            	*msc_ld;
	struct berval          	msc_bound_ndn;
	struct berval		msc_cred;
	int             	msc_bound;
#define META_UNBOUND		0
#define META_BOUND		1
#define META_ANONYMOUS		2
};

#define META_LAST(lsc)		((lsc)->msc_candidate == META_LAST_CONN)

struct metaconn {
	struct slap_conn	*mc_conn;
	
	/*
	 * means that the connection is bound; 
	 * of course only one target actually is ...
	 */
	int             	mc_bound_target;
#define META_BOUND_NONE		(-1)
#define META_BOUND_ALL		-2
	/* supersedes the connection stuff */
	struct metasingleconn	*mc_conns;
};

struct metatarget {
	char			*mt_uri;
	struct berval		mt_psuffix;		/* pretty suffix */
	struct berval		mt_nsuffix;		/* normalized suffix */
	struct berval		mt_binddn;
	struct berval		mt_bindpw;

	struct berval           mt_pseudorootdn;
	struct berval           mt_pseudorootpw;

	struct ldaprwmap	mt_rwmap;
};

struct metadncache {
	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 */
};

struct metainfo {
	int			mi_ntargets;
	int			mi_defaulttarget;
	int			mi_network_timeout;
#define META_DEFAULT_TARGET_NONE	(-1)
	struct metatarget	**mi_targets;
	char			*mi_candidates;

	struct metadncache	mi_cache;
	
	ldap_pvt_thread_mutex_t	mi_conn_mutex;
	Avlnode			*mi_conntree;

	unsigned		flags;
#if 0
/* defined in <back-ldap/back-ldap.h> */
#define LDAP_BACK_F_NONE		0x00U
#define LDAP_BACK_F_SAVECRED		0x01U
#define LDAP_BACK_F_USE_TLS		0x02U
#define LDAP_BACK_F_TLS_CRITICAL	( 0x04U | LDAP_BACK_F_USE_TLS )
#define LDAP_BACK_F_CHASE_REFERRALS	0x8U
#endif
};

typedef enum meta_op_type {
	META_OP_ALLOW_MULTIPLE = 0,
	META_OP_REQUIRE_SINGLE,
	META_OP_REQUIRE_ALL
} meta_op_type;

char *
meta_back_candidates_get( Operation *op );

extern struct metaconn *
meta_back_getconn(
		Operation		*op,
		SlapReply		*rs,
		int			*candidate,
		ldap_back_send_t	sendok
);

extern int
meta_back_dobind(
		struct metaconn		*lc,
		Operation		*op,
		ldap_back_send_t	sendok
);

extern int
meta_back_is_valid(
		struct metaconn 	*lc, 
		int 			candidate 
);

extern int
meta_back_op_result(
		struct metaconn		*lc,
		Operation		*op,
		SlapReply		*rs,
		int			candidate
);

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_conn_dup(
		void			*c1,
		void			*c2
);

/*
 * Candidate stuff
 */
extern int
meta_back_is_candidate(
		struct berval		*nsuffix,
		struct berval		*ndn
);

extern int
meta_back_select_unique_candidate(
		struct metainfo		*li,
		struct berval		*ndn
);

extern int
meta_clear_unused_candidates(
		Operation		*op,
		struct metaconn		*lc,
		int			candidate
);

extern int
meta_clear_one_candidate(
		struct metasingleconn	*lc
);

/*
 * 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(
		struct metadncache	*cache,
		struct berval		*ndn
);

extern int
meta_dncache_update_entry(
		struct metadncache	*cache,
		struct berval		*ndn,
		int			target
);

extern int
meta_dncache_delete_entry(
		struct metadncache	*cache,
		struct berval		*ndn
);

extern void
meta_dncache_free(
		void *entry
);

LDAP_END_DECL

#endif /* SLAPD_META_H */