external/bsd/openldap/dist/servers/slapd/back-meta/back-meta.h

   1 /* $OpenLDAP: pkg/ldap/servers/slapd/back-meta/back-meta.h,v 1.64.2.10 2008/07/10 00:28:39 quanah Exp $ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2008 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #ifndef SLAPD_LDAP_H
  24 #error "include servers/slapd/back-ldap/back-ldap.h before this file!"
  25 #endif /* SLAPD_LDAP_H */
  26
  27 #ifndef SLAPD_META_H
  28 #define SLAPD_META_H
  29
  30 #include "proto-meta.h"
  31
  32 /* String rewrite library */
  33 #include "rewrite.h"
  34
  35 LDAP_BEGIN_DECL
  36
  37 /*
  38  * Set META_BACK_PRINT_CONNTREE larger than 0 to dump the connection tree (debug only)
  39  */
  40 #ifndef META_BACK_PRINT_CONNTREE
  41 #define META_BACK_PRINT_CONNTREE 0
  42 #endif /* !META_BACK_PRINT_CONNTREE */
  43
  44 /* from back-ldap.h before rwm removal */
  45 struct ldapmap {
  46         int drop_missing;
  47
  48         Avlnode *map;
  49         Avlnode *remap;
  50 };
  51
  52 struct ldapmapping {
  53         struct berval src;
  54         struct berval dst;
  55 };
  56
  57 struct ldaprwmap {
  58         /*
  59          * DN rewriting
  60          */
  61 #ifdef ENABLE_REWRITE
  62         struct rewrite_info *rwm_rw;
  63 #else /* !ENABLE_REWRITE */
  64         /* some time the suffix massaging without librewrite
  65          * will be disabled */
  66         BerVarray rwm_suffix_massage;
  67 #endif /* !ENABLE_REWRITE */
  68
  69         /*
  70          * Attribute/objectClass mapping
  71          */
  72         struct ldapmap rwm_oc;
  73         struct ldapmap rwm_at;
  74 };
  75
  76 /* Whatever context ldap_back_dn_massage needs... */
  77 typedef struct dncookie {
  78         struct metatarget_t     *target;
  79
  80 #ifdef ENABLE_REWRITE
  81         Connection              *conn;
  82         char                    *ctx;
  83         SlapReply               *rs;
  84 #else
  85         int                     normalized;
  86         int                     tofrom;
  87 #endif
  88 } dncookie;
  89
  90 int ldap_back_dn_massage(dncookie *dc, struct berval *dn,
  91         struct berval *res);
  92
  93 extern int ldap_back_conn_cmp( const void *c1, const void *c2);
  94 extern int ldap_back_conn_dup( void *c1, void *c2 );
  95 extern void ldap_back_conn_free( void *c );
  96
  97 /* attributeType/objectClass mapping */
  98 int mapping_cmp (const void *, const void *);
  99 int mapping_dup (void *, void *);
 100
 101 void ldap_back_map_init ( struct ldapmap *lm, struct ldapmapping ** );
 102 int ldap_back_mapping ( struct ldapmap *map, struct berval *s,
 103         struct ldapmapping **m, int remap );
 104 void ldap_back_map ( struct ldapmap *map, struct berval *s, struct berval *m,
 105         int remap );
 106 #define BACKLDAP_MAP    0
 107 #define BACKLDAP_REMAP  1
 108 char *
 109 ldap_back_map_filter(
 110         struct ldapmap *at_map,
 111         struct ldapmap *oc_map,
 112         struct berval *f,
 113         int remap );
 114
 115 int
 116 ldap_back_map_attrs(
 117         struct ldapmap *at_map,
 118         AttributeName *a,
 119         int remap,
 120         char ***mapped_attrs );
 121
 122 extern int ldap_back_map_config(
 123         struct ldapmap  *oc_map,
 124         struct ldapmap  *at_map,
 125         const char      *fname,
 126         int             lineno,
 127         int             argc,
 128         char            **argv );
 129
 130 extern int
 131 ldap_back_filter_map_rewrite(
 132         dncookie        *dc,
 133         Filter          *f,
 134         struct berval   *fstr,
 135         int             remap );
 136
 137 /* suffix massaging by means of librewrite */
 138 #ifdef ENABLE_REWRITE
 139 extern int
 140 suffix_massage_config( struct rewrite_info *info,
 141         struct berval *pvnc,
 142         struct berval *nvnc,
 143         struct berval *prnc,
 144         struct berval *nrnc );
 145 #endif /* ENABLE_REWRITE */
 146 extern int
 147 ldap_back_referral_result_rewrite(
 148         dncookie        *dc,
 149         BerVarray       a_vals );
 150 extern int
 151 ldap_dnattr_rewrite(
 152         dncookie        *dc,
 153         BerVarray       a_vals );
 154 extern int
 155 ldap_dnattr_result_rewrite(
 156         dncookie        *dc,
 157         BerVarray       a_vals );
 158
 159 /* (end of) from back-ldap.h before rwm removal */
 160
 161 /*
 162  * A metasingleconn_t can be in the following, mutually exclusive states:
 163  *
 164  *      - none                  (0x0U)
 165  *      - creating              META_BACK_FCONN_CREATING
 166  *      - initialized           META_BACK_FCONN_INITED
 167  *      - binding               LDAP_BACK_FCONN_BINDING
 168  *      - bound/anonymous       LDAP_BACK_FCONN_ISBOUND/LDAP_BACK_FCONN_ISANON
 169  *
 170  * possible modifiers are:
 171  *
 172  *      - privileged            LDAP_BACK_FCONN_ISPRIV
 173  *      - privileged, TLS       LDAP_BACK_FCONN_ISTLS
 174  *      - subjected to idassert LDAP_BACK_FCONN_ISIDASR
 175  *      - tainted               LDAP_BACK_FCONN_TAINTED
 176  */
 177
 178 #define META_BACK_FCONN_INITED          (0x00100000U)
 179 #define META_BACK_FCONN_CREATING        (0x00200000U)
 180
 181 #define META_BACK_CONN_INITED(lc)               LDAP_BACK_CONN_ISSET((lc), META_BACK_FCONN_INITED)
 182 #define META_BACK_CONN_INITED_SET(lc)           LDAP_BACK_CONN_SET((lc), META_BACK_FCONN_INITED)
 183 #define META_BACK_CONN_INITED_CLEAR(lc)         LDAP_BACK_CONN_CLEAR((lc), META_BACK_FCONN_INITED)
 184 #define META_BACK_CONN_INITED_CPY(lc, mlc)      LDAP_BACK_CONN_CPY((lc), META_BACK_FCONN_INITED, (mlc))
 185 #define META_BACK_CONN_CREATING(lc)             LDAP_BACK_CONN_ISSET((lc), META_BACK_FCONN_CREATING)
 186 #define META_BACK_CONN_CREATING_SET(lc)         LDAP_BACK_CONN_SET((lc), META_BACK_FCONN_CREATING)
 187 #define META_BACK_CONN_CREATING_CLEAR(lc)       LDAP_BACK_CONN_CLEAR((lc), META_BACK_FCONN_CREATING)
 188 #define META_BACK_CONN_CREATING_CPY(lc, mlc)    LDAP_BACK_CONN_CPY((lc), META_BACK_FCONN_CREATING, (mlc))
 189
 190 struct metainfo_t;
 191
 192 #define META_NOT_CANDIDATE              ((ber_tag_t)0x0)
 193 #define META_CANDIDATE                  ((ber_tag_t)0x1)
 194 #define META_BINDING                    ((ber_tag_t)0x2)
 195 #define META_RETRYING                   ((ber_tag_t)0x4)
 196
 197 typedef struct metasingleconn_t {
 198 #define META_CND_ISSET(rs,f)            ( ( (rs)->sr_tag & (f) ) == (f) )
 199 #define META_CND_SET(rs,f)              ( (rs)->sr_tag |= (f) )
 200 #define META_CND_CLEAR(rs,f)            ( (rs)->sr_tag &= ~(f) )
 201
 202 #define META_CANDIDATE_RESET(rs)        ( (rs)->sr_tag = 0 )
 203 #define META_IS_CANDIDATE(rs)           META_CND_ISSET( (rs), META_CANDIDATE )
 204 #define META_CANDIDATE_SET(rs)          META_CND_SET( (rs), META_CANDIDATE )
 205 #define META_CANDIDATE_CLEAR(rs)        META_CND_CLEAR( (rs), META_CANDIDATE )
 206 #define META_IS_BINDING(rs)             META_CND_ISSET( (rs), META_BINDING )
 207 #define META_BINDING_SET(rs)            META_CND_SET( (rs), META_BINDING )
 208 #define META_BINDING_CLEAR(rs)          META_CND_CLEAR( (rs), META_BINDING )
 209 #define META_IS_RETRYING(rs)            META_CND_ISSET( (rs), META_RETRYING )
 210 #define META_RETRYING_SET(rs)           META_CND_SET( (rs), META_RETRYING )
 211 #define META_RETRYING_CLEAR(rs)         META_CND_CLEAR( (rs), META_RETRYING )
 212
 213         LDAP                    *msc_ld;
 214         time_t                  msc_time;
 215         struct berval           msc_bound_ndn;
 216         struct berval           msc_cred;
 217         unsigned                msc_mscflags;
 218         /* NOTE: lc_lcflags is redefined to msc_mscflags to reuse the macros
 219          * defined for back-ldap */
 220 #define lc_lcflags              msc_mscflags
 221 } metasingleconn_t;
 222
 223 typedef struct metaconn_t {
 224         Connection              *mc_conn;
 225 #define lc_conn                 mc_conn
 226         unsigned                mc_refcnt;
 227
 228         time_t                  mc_create_time;
 229         time_t                  mc_time;
 230
 231         struct berval           mc_local_ndn;
 232         /* NOTE: msc_mscflags is used to recycle the #define
 233          * in metasingleconn_t */
 234         unsigned                msc_mscflags;
 235
 236         /*
 237          * means that the connection is bound;
 238          * of course only one target actually is ...
 239          */
 240         int                     mc_authz_target;
 241 #define META_BOUND_NONE         (-1)
 242 #define META_BOUND_ALL          (-2)
 243
 244         struct metainfo_t       *mc_info;
 245
 246         LDAP_TAILQ_ENTRY(metaconn_t)    mc_q;
 247
 248         /* supersedes the connection stuff */
 249         metasingleconn_t        mc_conns[ 1 ];
 250         /* NOTE: mc_conns must be last, because
 251          * the required number of conns is malloc'ed
 252          * in one block with the metaconn_t structure */
 253 } metaconn_t;
 254
 255 typedef struct metatarget_t {
 256         char                    *mt_uri;
 257         ldap_pvt_thread_mutex_t mt_uri_mutex;
 258
 259         /* TODO: we might want to enable different strategies
 260          * for different targets */
 261         LDAP_REBIND_PROC        *mt_rebind_f;
 262         LDAP_URLLIST_PROC       *mt_urllist_f;
 263         void                    *mt_urllist_p;
 264
 265         BerVarray               mt_subtree_exclude;
 266         int                     mt_scope;
 267
 268         struct berval           mt_psuffix;             /* pretty suffix */
 269         struct berval           mt_nsuffix;             /* normalized suffix */
 270
 271         struct berval           mt_binddn;
 272         struct berval           mt_bindpw;
 273
 274         slap_idassert_t         mt_idassert;
 275 #define mt_idassert_mode        mt_idassert.si_mode
 276 #define mt_idassert_authcID     mt_idassert.si_bc.sb_authcId
 277 #define mt_idassert_authcDN     mt_idassert.si_bc.sb_binddn
 278 #define mt_idassert_passwd      mt_idassert.si_bc.sb_cred
 279 #define mt_idassert_authzID     mt_idassert.si_bc.sb_authzId
 280 #define mt_idassert_authmethod  mt_idassert.si_bc.sb_method
 281 #define mt_idassert_sasl_mech   mt_idassert.si_bc.sb_saslmech
 282 #define mt_idassert_sasl_realm  mt_idassert.si_bc.sb_realm
 283 #define mt_idassert_secprops    mt_idassert.si_bc.sb_secprops
 284 #define mt_idassert_tls         mt_idassert.si_bc.sb_tls
 285 #define mt_idassert_flags       mt_idassert.si_flags
 286 #define mt_idassert_authz       mt_idassert.si_authz
 287
 288         int                     mt_nretries;
 289 #define META_RETRY_UNDEFINED    (-2)
 290 #define META_RETRY_FOREVER      (-1)
 291 #define META_RETRY_NEVER        (0)
 292 #define META_RETRY_DEFAULT      (10)
 293
 294         struct ldaprwmap        mt_rwmap;
 295
 296         sig_atomic_t            mt_isquarantined;
 297         slap_retry_info_t       mt_quarantine;
 298         ldap_pvt_thread_mutex_t mt_quarantine_mutex;
 299
 300         unsigned                mt_flags;
 301 #define META_BACK_TGT_ISSET(mt,f)               ( ( (mt)->mt_flags & (f) ) == (f) )
 302 #define META_BACK_TGT_ISMASK(mt,m,f)            ( ( (mt)->mt_flags & (m) ) == (f) )
 303
 304 #define META_BACK_TGT_T_F(mt)                   META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_T_F_MASK, LDAP_BACK_F_T_F )
 305 #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 )
 306
 307 #define META_BACK_TGT_ABANDON(mt)               META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK, LDAP_BACK_F_CANCEL_ABANDON )
 308 #define META_BACK_TGT_IGNORE(mt)                META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK, LDAP_BACK_F_CANCEL_IGNORE )
 309 #define META_BACK_TGT_CANCEL(mt)                META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK, LDAP_BACK_F_CANCEL_EXOP )
 310 #define META_BACK_TGT_CANCEL_DISCOVER(mt)       META_BACK_TGT_ISMASK( (mt), LDAP_BACK_F_CANCEL_MASK2, LDAP_BACK_F_CANCEL_EXOP_DISCOVER )
 311 #define META_BACK_TGT_QUARANTINE(mt)            META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_QUARANTINE )
 312
 313 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
 314 #define META_BACK_TGT_ST_REQUEST(mt)            META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_ST_REQUEST )
 315 #define META_BACK_TGT_ST_RESPONSE(mt)           META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_ST_RESPONSE )
 316 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
 317
 318 #define META_BACK_TGT_NOREFS(mt)                META_BACK_TGT_ISSET( (mt), LDAP_BACK_F_NOREFS )
 319
 320         int                     mt_version;
 321         time_t                  mt_network_timeout;
 322         struct timeval          mt_bind_timeout;
 323 #define META_BIND_TIMEOUT       LDAP_BACK_RESULT_UTIMEOUT
 324         time_t                  mt_timeout[ SLAP_OP_LAST ];
 325 } metatarget_t;
 326
 327 typedef struct metadncache_t {
 328         ldap_pvt_thread_mutex_t mutex;
 329         Avlnode                 *tree;
 330
 331 #define META_DNCACHE_DISABLED   (0)
 332 #define META_DNCACHE_FOREVER    ((time_t)(-1))
 333         time_t                  ttl;  /* seconds; 0: no cache, -1: no expiry */
 334 } metadncache_t;
 335
 336 typedef struct metacandidates_t {
 337         int                     mc_ntargets;
 338         SlapReply               *mc_candidates;
 339 } metacandidates_t;
 340
 341 /*
 342  * Hook to allow mucking with metainfo_t/metatarget_t when quarantine is over
 343  */
 344 typedef int (*meta_back_quarantine_f)( struct metainfo_t *, int target, void * );
 345
 346 typedef struct metainfo_t {
 347         int                     mi_ntargets;
 348         int                     mi_defaulttarget;
 349 #define META_DEFAULT_TARGET_NONE        (-1)
 350         int                     mi_nretries;
 351
 352         metatarget_t            **mi_targets;
 353         metacandidates_t        *mi_candidates;
 354
 355         LDAP_REBIND_PROC        *mi_rebind_f;
 356         LDAP_URLLIST_PROC       *mi_urllist_f;
 357
 358         metadncache_t           mi_cache;
 359
 360         /* cached connections;
 361          * special conns are in tailq rather than in tree */
 362         ldap_avl_info_t         mi_conninfo;
 363         struct {
 364                 int                                             mic_num;
 365                 LDAP_TAILQ_HEAD(mc_conn_priv_q, metaconn_t)     mic_priv;
 366         }                       mi_conn_priv[ LDAP_BACK_PCONN_LAST ];
 367         int                     mi_conn_priv_max;
 368
 369         /* NOTE: quarantine uses the connection mutex */
 370         slap_retry_info_t       mi_quarantine;
 371         meta_back_quarantine_f  mi_quarantine_f;
 372         void                    *mi_quarantine_p;
 373
 374         unsigned                mi_flags;
 375 #define li_flags                mi_flags
 376 /* uses flags as defined in <back-ldap/back-ldap.h> */
 377 #define META_BACK_F_ONERR_STOP          (0x00100000U)
 378 #define META_BACK_F_ONERR_REPORT        (0x00200000U)
 379 #define META_BACK_F_ONERR_MASK          (META_BACK_F_ONERR_STOP|META_BACK_F_ONERR_REPORT)
 380 #define META_BACK_F_DEFER_ROOTDN_BIND   (0x00400000U)
 381 #define META_BACK_F_PROXYAUTHZ_ALWAYS   (0x00800000U)   /* users always proxyauthz */
 382 #define META_BACK_F_PROXYAUTHZ_ANON     (0x01000000U)   /* anonymous always proxyauthz */
 383 #define META_BACK_F_PROXYAUTHZ_NOANON   (0x02000000U)   /* anonymous remains anonymous */
 384
 385 #define META_BACK_ONERR_STOP(mi)        LDAP_BACK_ISSET( (mi), META_BACK_F_ONERR_STOP )
 386 #define META_BACK_ONERR_REPORT(mi)      LDAP_BACK_ISSET( (mi), META_BACK_F_ONERR_REPORT )
 387 #define META_BACK_ONERR_CONTINUE(mi)    ( !LDAP_BACK_ISSET( (mi), META_BACK_F_ONERR_MASK ) )
 388
 389 #define META_BACK_DEFER_ROOTDN_BIND(mi) LDAP_BACK_ISSET( (mi), META_BACK_F_DEFER_ROOTDN_BIND )
 390 #define META_BACK_PROXYAUTHZ_ALWAYS(mi) LDAP_BACK_ISSET( (mi), META_BACK_F_PROXYAUTHZ_ALWAYS )
 391 #define META_BACK_PROXYAUTHZ_ANON(mi)   LDAP_BACK_ISSET( (mi), META_BACK_F_PROXYAUTHZ_ANON )
 392 #define META_BACK_PROXYAUTHZ_NOANON(mi) LDAP_BACK_ISSET( (mi), META_BACK_F_PROXYAUTHZ_NOANON )
 393
 394 #define META_BACK_QUARANTINE(mi)        LDAP_BACK_ISSET( (mi), LDAP_BACK_F_QUARANTINE )
 395
 396         int                     mi_version;
 397         time_t                  mi_network_timeout;
 398         time_t                  mi_conn_ttl;
 399         time_t                  mi_idle_timeout;
 400         struct timeval          mi_bind_timeout;
 401         time_t                  mi_timeout[ SLAP_OP_LAST ];
 402
 403         ldap_extra_t    *mi_ldap_extra;
 404
 405 } metainfo_t;
 406
 407 typedef enum meta_op_type {
 408         META_OP_ALLOW_MULTIPLE = 0,
 409         META_OP_REQUIRE_SINGLE,
 410         META_OP_REQUIRE_ALL
 411 } meta_op_type;
 412
 413 SlapReply *
 414 meta_back_candidates_get( Operation *op );
 415
 416 extern metaconn_t *
 417 meta_back_getconn(
 418         Operation               *op,
 419         SlapReply               *rs,
 420         int                     *candidate,
 421         ldap_back_send_t        sendok );
 422
 423 extern void
 424 meta_back_release_conn_lock(
 425         metainfo_t              *mi,
 426         metaconn_t              *mc,
 427         int                     dolock );
 428 #define meta_back_release_conn(mi, mc)  meta_back_release_conn_lock( (mi), (mc), 1 )
 429
 430 extern int
 431 meta_back_retry(
 432         Operation               *op,
 433         SlapReply               *rs,
 434         metaconn_t              **mcp,
 435         int                     candidate,
 436         ldap_back_send_t        sendok );
 437
 438 extern void
 439 meta_back_conn_free(
 440         void                    *v_mc );
 441
 442 #if META_BACK_PRINT_CONNTREE > 0
 443 extern void
 444 meta_back_print_conntree(
 445         metainfo_t              *mi,
 446         char                    *msg );
 447 #endif
 448
 449 extern int
 450 meta_back_init_one_conn(
 451         Operation               *op,
 452         SlapReply               *rs,
 453         metaconn_t              *mc,
 454         int                     candidate,
 455         int                     ispriv,
 456         ldap_back_send_t        sendok,
 457         int                     dolock );
 458
 459 extern void
 460 meta_back_quarantine(
 461         Operation               *op,
 462         SlapReply               *rs,
 463         int                     candidate );
 464
 465 extern int
 466 meta_back_dobind(
 467         Operation               *op,
 468         SlapReply               *rs,
 469         metaconn_t              *mc,
 470         ldap_back_send_t        sendok );
 471
 472 extern int
 473 meta_back_single_dobind(
 474         Operation               *op,
 475         SlapReply               *rs,
 476         metaconn_t              **mcp,
 477         int                     candidate,
 478         ldap_back_send_t        sendok,
 479         int                     retries,
 480         int                     dolock );
 481
 482 extern int
 483 meta_back_proxy_authz_cred(
 484         metaconn_t              *mc,
 485         int                     candidate,
 486         Operation               *op,
 487         SlapReply               *rs,
 488         ldap_back_send_t        sendok,
 489         struct berval           *binddn,
 490         struct berval           *bindcred,
 491         int                     *method );
 492
 493 extern int
 494 meta_back_cancel(
 495         metaconn_t              *mc,
 496         Operation               *op,
 497         SlapReply               *rs,
 498         ber_int_t               msgid,
 499         int                     candidate,
 500         ldap_back_send_t        sendok );
 501
 502 extern int
 503 meta_back_op_result(
 504         metaconn_t              *mc,
 505         Operation               *op,
 506         SlapReply               *rs,
 507         int                     candidate,
 508         ber_int_t               msgid,
 509         time_t                  timeout,
 510         ldap_back_send_t        sendok );
 511
 512 extern int
 513 meta_back_controls_add(
 514         Operation       *op,
 515         SlapReply       *rs,
 516         metaconn_t      *mc,
 517         int             candidate,
 518         LDAPControl     ***pctrls );
 519
 520 extern int
 521 back_meta_LTX_init_module(
 522         int                     argc,
 523         char                    *argv[] );
 524
 525 extern int
 526 meta_back_conn_cmp(
 527         const void              *c1,
 528         const void              *c2 );
 529
 530 extern int
 531 meta_back_conndn_cmp(
 532         const void              *c1,
 533         const void              *c2 );
 534
 535 extern int
 536 meta_back_conndn_dup(
 537         void                    *c1,
 538         void                    *c2 );
 539
 540 /*
 541  * Candidate stuff
 542  */
 543 extern int
 544 meta_back_is_candidate(
 545         metatarget_t            *mt,
 546         struct berval           *ndn,
 547         int                     scope );
 548
 549 extern int
 550 meta_back_select_unique_candidate(
 551         metainfo_t              *mi,
 552         struct berval           *ndn );
 553
 554 extern int
 555 meta_clear_unused_candidates(
 556         Operation               *op,
 557         int                     candidate );
 558
 559 extern int
 560 meta_clear_one_candidate(
 561         Operation               *op,
 562         metaconn_t              *mc,
 563         int                     candidate );
 564
 565 /*
 566  * Dn cache stuff (experimental)
 567  */
 568 extern int
 569 meta_dncache_cmp(
 570         const void              *c1,
 571         const void              *c2 );
 572
 573 extern int
 574 meta_dncache_dup(
 575         void                    *c1,
 576         void                    *c2 );
 577
 578 #define META_TARGET_NONE        (-1)
 579 #define META_TARGET_MULTIPLE    (-2)
 580 extern int
 581 meta_dncache_get_target(
 582         metadncache_t           *cache,
 583         struct berval           *ndn );
 584
 585 extern int
 586 meta_dncache_update_entry(
 587         metadncache_t           *cache,
 588         struct berval           *ndn,
 589         int                     target );
 590
 591 extern int
 592 meta_dncache_delete_entry(
 593         metadncache_t           *cache,
 594         struct berval           *ndn );
 595
 596 extern void
 597 meta_dncache_free( void *entry );
 598
 599 extern LDAP_REBIND_PROC         meta_back_default_rebind;
 600 extern LDAP_URLLIST_PROC        meta_back_default_urllist;
 601
 602 LDAP_END_DECL
 603
 604 #endif /* SLAPD_META_H */
 605