git.sur5r.net Git - openldap/blob - servers/slapd/overlays/translucent.c

   1 /* translucent.c - translucent proxy module */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004-2008 The OpenLDAP Foundation.
   6  * Portions Copyright 2005 Symas Corporation.
   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 Symas Corp. for inclusion in
  19  * OpenLDAP Software.  This work was sponsored by Hewlett-Packard.
  20  */
  21
  22 #include "portable.h"
  23
  24 #ifdef SLAPD_OVER_TRANSLUCENT
  25
  26 #include <stdio.h>
  27
  28 #include <ac/string.h>
  29 #include <ac/socket.h>
  30
  31 #include "slap.h"
  32 #include "lutil.h"
  33
  34 #include "config.h"
  35
  36 /* config block */
  37 typedef struct translucent_info {
  38         BackendDB db;                   /* captive backend */
  39         AttributeName *local;   /* valid attrs for local filters */
  40         AttributeName *remote;  /* valid attrs for remote filters */
  41         int strict;
  42         int no_glue;
  43         int defer_db_open;
  44         int bind_local;
  45 } translucent_info;
  46
  47 static ConfigLDAPadd translucent_ldadd;
  48 static ConfigCfAdd translucent_cfadd;
  49
  50 static ConfigDriver translucent_cf_gen;
  51
  52 enum {
  53         TRANS_LOCAL = 1,
  54         TRANS_REMOTE
  55 };
  56
  57 static ConfigTable translucentcfg[] = {
  58         { "translucent_strict", "on|off", 1, 2, 0,
  59           ARG_ON_OFF|ARG_OFFSET,
  60           (void *)offsetof(translucent_info, strict),
  61           "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
  62           "DESC 'Reveal attribute deletion constraint violations' "
  63           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  64         { "translucent_no_glue", "on|off", 1, 2, 0,
  65           ARG_ON_OFF|ARG_OFFSET,
  66           (void *)offsetof(translucent_info, no_glue),
  67           "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
  68           "DESC 'Disable automatic glue records for ADD and MODRDN' "
  69           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  70         { "translucent_local", "attr[,attr...]", 1, 2, 0,
  71           ARG_MAGIC|TRANS_LOCAL,
  72           translucent_cf_gen,
  73           "( OLcfgOvAt:14.3 NAME 'olcTranslucentLocal' "
  74           "DESC 'Attributes to use in local search filter' "
  75           "SYNTAX OMsDirectoryString )", NULL, NULL },
  76         { "translucent_remote", "attr[,attr...]", 1, 2, 0,
  77           ARG_MAGIC|TRANS_REMOTE,
  78           translucent_cf_gen,
  79           "( OLcfgOvAt:14.4 NAME 'olcTranslucentRemote' "
  80           "DESC 'Attributes to use in remote search filter' "
  81           "SYNTAX OMsDirectoryString )", NULL, NULL },
  82         { "translucent_bind_local", "on|off", 1, 2, 0,
  83           ARG_ON_OFF|ARG_OFFSET,
  84           (void *)offsetof(translucent_info, bind_local),
  85           "( OLcfgOvAt:14.5 NAME 'olcTranslucentBindLocal' "
  86           "DESC 'Enable local bind' "
  87           "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
  88         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  89 };
  90
  91 static ConfigTable transdummy[] = {
  92         { "", "", 0, 0, 0, ARG_IGNORED,
  93                 NULL, "( OLcfgGlAt:13 NAME 'olcDatabase' "
  94                         "DESC 'The backend type for a database instance' "
  95                         "SUP olcBackend SINGLE-VALUE X-ORDERED 'SIBLINGS' )", NULL, NULL },
  96         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  97 };
  98
  99 static ConfigOCs translucentocs[] = {
 100         { "( OLcfgOvOc:14.1 "
 101           "NAME 'olcTranslucentConfig' "
 102           "DESC 'Translucent configuration' "
 103           "SUP olcOverlayConfig "
 104           "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue $"
 105           " olcTranslucentLocal $ olcTranslucentRemote $"
 106           " olcTranslucentBindLocal ) )",
 107           Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
 108         { "( OLcfgOvOc:14.2 "
 109           "NAME 'olcTranslucentDatabase' "
 110           "DESC 'Translucent target database configuration' "
 111           "AUXILIARY )", Cft_Misc, transdummy, translucent_ldadd },
 112         { NULL, 0, NULL }
 113 };
 114 /* for translucent_init() */
 115
 116 static int
 117 translucent_ldadd_cleanup( ConfigArgs *ca )
 118 {
 119         slap_overinst *on = ca->ca_private;
 120         translucent_info *ov = on->on_bi.bi_private;
 121
 122         ov->defer_db_open = 0;
 123         return backend_startup_one( ca->be, &ca->reply );
 124 }
 125
 126 static int
 127 translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
 128 {
 129         slap_overinst *on;
 130         translucent_info *ov;
 131
 132         Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
 133
 134         if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
 135              cei->ce_bi->bi_cf_ocs != translucentocs )
 136                 return LDAP_CONSTRAINT_VIOLATION;
 137
 138         on = (slap_overinst *)cei->ce_bi;
 139         ov = on->on_bi.bi_private;
 140         ca->be = &ov->db;
 141         ca->ca_private = on;
 142         if ( CONFIG_ONLINE_ADD( ca ))
 143                 ca->cleanup = translucent_ldadd_cleanup;
 144         else
 145                 ov->defer_db_open = 0;
 146
 147         return LDAP_SUCCESS;
 148 }
 149
 150 static int
 151 translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
 152 {
 153         CfEntryInfo *cei = e->e_private;
 154         slap_overinst *on = (slap_overinst *)cei->ce_bi;
 155         translucent_info *ov = on->on_bi.bi_private;
 156         struct berval bv;
 157
 158         Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
 159
 160         /* FIXME: should not hardcode "olcDatabase" here */
 161         bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
 162                 "olcDatabase=%s", ov->db.bd_info->bi_type );
 163         if ( bv.bv_len < 0 || bv.bv_len >= sizeof( ca->cr_msg ) ) {
 164                 return -1;
 165         }
 166         bv.bv_val = ca->cr_msg;
 167         ca->be = &ov->db;
 168         ov->defer_db_open = 0;
 169
 170         /* We can only create this entry if the database is table-driven
 171          */
 172         if ( ov->db.bd_info->bi_cf_ocs )
 173                 config_build_entry( op, rs, cei, ca, &bv,
 174                                     ov->db.bd_info->bi_cf_ocs,
 175                                     &translucentocs[1] );
 176
 177         return 0;
 178 }
 179
 180 static int
 181 translucent_cf_gen( ConfigArgs *c )
 182 {
 183         slap_overinst   *on = (slap_overinst *)c->bi;
 184         translucent_info *ov = on->on_bi.bi_private;
 185         AttributeName **an, *a2;
 186         int i;
 187
 188         if ( c->type == TRANS_LOCAL )
 189                 an = &ov->local;
 190         else
 191                 an = &ov->remote;
 192
 193         if ( c->op == SLAP_CONFIG_EMIT ) {
 194                 if ( !*an )
 195                         return 1;
 196                 for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) {
 197                         value_add_one( &c->rvalue_vals, &(*an)[i].an_name );
 198                 }
 199                 return ( i < 1 );
 200         } else if ( c->op == LDAP_MOD_DELETE ) {
 201                 if ( c->valx < 0 ) {
 202                         anlist_free( *an, 1, NULL );
 203                         *an = NULL;
 204                 } else {
 205                         i = c->valx;
 206                         ch_free( (*an)[i].an_name.bv_val );
 207                         do {
 208                                 (*an)[i] = (*an)[i+1];
 209                         } while ( !BER_BVISNULL( &(*an)[i].an_name ));
 210                 }
 211                 return 0;
 212         }
 213         a2 = str2anlist( *an, c->argv[1], "," );
 214         if ( !a2 ) {
 215                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s",
 216                         c->argv[0], c->argv[1] );
 217                 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 218                         "%s: %s\n", c->log, c->cr_msg, 0 );
 219                 return ARG_BAD_CONF;
 220         }
 221         *an = a2;
 222         return 0;
 223 }
 224
 225 static slap_overinst translucent;
 226
 227 /*
 228 ** glue_parent()
 229 **      call syncrepl_add_glue() with the parent suffix;
 230 **
 231 */
 232
 233 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 234
 235 void glue_parent(Operation *op) {
 236         Operation nop = *op;
 237         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 238         struct berval ndn = BER_BVNULL;
 239         Attribute *a;
 240         Entry *e;
 241         struct berval   pdn;
 242
 243         dnParent( &op->o_req_ndn, &pdn );
 244         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 245
 246         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 247
 248         e = entry_alloc();
 249         e->e_id = NOID;
 250         ber_dupbv(&e->e_name, &ndn);
 251         ber_dupbv(&e->e_nname, &ndn);
 252
 253         a = attr_alloc( slap_schema.si_ad_objectClass );
 254         a->a_numvals = 2;
 255         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 256         ber_dupbv(&a->a_vals[0], &glue[0]);
 257         ber_dupbv(&a->a_vals[1], &glue[1]);
 258         ber_dupbv(&a->a_vals[2], &glue[2]);
 259         a->a_nvals = a->a_vals;
 260         a->a_next = e->e_attrs;
 261         e->e_attrs = a;
 262
 263         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 264         a->a_numvals = 1;
 265         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 266         ber_dupbv(&a->a_vals[0], &glue[1]);
 267         ber_dupbv(&a->a_vals[1], &glue[2]);
 268         a->a_nvals = a->a_vals;
 269         a->a_next = e->e_attrs;
 270         e->e_attrs = a;
 271
 272         nop.o_req_dn = ndn;
 273         nop.o_req_ndn = ndn;
 274         nop.ora_e = e;
 275
 276         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 277         syncrepl_add_glue(&nop, e);
 278         nop.o_bd->bd_info = (BackendInfo *) on;
 279
 280         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 281
 282         return;
 283 }
 284
 285 /*
 286 ** dup_bervarray()
 287 **      copy a BerVarray;
 288 */
 289
 290 BerVarray dup_bervarray(BerVarray b) {
 291         int i, len;
 292         BerVarray nb;
 293         for(len = 0; b[len].bv_val; len++);
 294         nb = ch_malloc((len+1) * sizeof(BerValue));
 295         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 296         nb[len].bv_val = NULL;
 297         nb[len].bv_len = 0;
 298         return(nb);
 299 }
 300
 301 /*
 302 ** free_attr_chain()
 303 **      free only the Attribute*, not the contents;
 304 **
 305 */
 306 void free_attr_chain(Attribute *b) {
 307         Attribute *a;
 308         for(a=b; a; a=a->a_next) {
 309                 a->a_vals = NULL;
 310                 a->a_nvals = NULL;
 311         }
 312         attrs_free( b );
 313         return;
 314 }
 315
 316 /*
 317 ** translucent_add()
 318 **      if not bound as root, send ACCESS error;
 319 **      if glue, glue_parent();
 320 **      return CONTINUE;
 321 **
 322 */
 323
 324 static int translucent_add(Operation *op, SlapReply *rs) {
 325         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 326         translucent_info *ov = on->on_bi.bi_private;
 327         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 328                 op->o_req_dn.bv_val, 0, 0);
 329         if(!be_isroot(op)) {
 330                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 331                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 332                         "user modification of overlay database not permitted");
 333                 op->o_bd->bd_info = (BackendInfo *) on;
 334                 return(rs->sr_err);
 335         }
 336         if(!ov->no_glue) glue_parent(op);
 337         return(SLAP_CB_CONTINUE);
 338 }
 339
 340 /*
 341 ** translucent_modrdn()
 342 **      if not bound as root, send ACCESS error;
 343 **      if !glue, glue_parent();
 344 **      else return CONTINUE;
 345 **
 346 */
 347
 348 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 349         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 350         translucent_info *ov = on->on_bi.bi_private;
 351         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 352                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 353         if(!be_isroot(op)) {
 354                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 355                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 356                         "user modification of overlay database not permitted");
 357                 op->o_bd->bd_info = (BackendInfo *) on;
 358                 return(rs->sr_err);
 359         }
 360         if(!ov->no_glue) {
 361                 op->o_tag = LDAP_REQ_ADD;
 362                 glue_parent(op);
 363                 op->o_tag = LDAP_REQ_MODRDN;
 364         }
 365         return(SLAP_CB_CONTINUE);
 366 }
 367
 368 /*
 369 ** translucent_delete()
 370 **      if not bound as root, send ACCESS error;
 371 **      else return CONTINUE;
 372 **
 373 */
 374
 375 static int translucent_delete(Operation *op, SlapReply *rs) {
 376         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 377         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 378                 op->o_req_dn.bv_val, 0, 0);
 379         if(!be_isroot(op)) {
 380                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 381                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 382                         "user modification of overlay database not permitted");
 383                 op->o_bd->bd_info = (BackendInfo *) on;
 384                 return(rs->sr_err);
 385         }
 386         return(SLAP_CB_CONTINUE);
 387 }
 388
 389 static int
 390 translucent_tag_cb( Operation *op, SlapReply *rs )
 391 {
 392         op->o_tag = LDAP_REQ_MODIFY;
 393         op->orm_modlist = op->o_callback->sc_private;
 394         rs->sr_tag = slap_req2res( op->o_tag );
 395
 396         return SLAP_CB_CONTINUE;
 397 }
 398
 399 /*
 400 ** translucent_modify()
 401 **      modify in local backend if exists in both;
 402 **      otherwise, add to local backend;
 403 **      fail if not defined in captive backend;
 404 **
 405 */
 406
 407 static int translucent_modify(Operation *op, SlapReply *rs) {
 408         SlapReply nrs = { REP_RESULT };
 409
 410         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 411         translucent_info *ov = on->on_bi.bi_private;
 412         Entry *e = NULL, *re = NULL;
 413         Attribute *a, *ax;
 414         Modifications *m, **mm;
 415         BackendDB *db;
 416         int del, rc, erc = 0;
 417         slap_callback cb = { 0 };
 418
 419         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 420                 op->o_req_dn.bv_val, 0, 0);
 421
 422         if(ov->defer_db_open) {
 423                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 424                         "remote DB not available");
 425                 return(rs->sr_err);
 426         }
 427 /*
 428 ** fetch entry from the captive backend;
 429 ** if it did not exist, fail;
 430 ** release it, if captive backend supports this;
 431 **
 432 */
 433
 434         db = op->o_bd;
 435         op->o_bd = &ov->db;
 436         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 437         if(rc != LDAP_SUCCESS || re == NULL ) {
 438                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 439                         "attempt to modify nonexistent local record");
 440                 return(rs->sr_err);
 441         }
 442         op->o_bd = db;
 443 /*
 444 ** fetch entry from local backend;
 445 ** if it exists:
 446 **      foreach Modification:
 447 **          if attr not present in local:
 448 **              if Mod == LDAP_MOD_DELETE:
 449 **                  if remote attr not present, return NO_SUCH;
 450 **                  if remote attr present, drop this Mod;
 451 **              else force this Mod to LDAP_MOD_ADD;
 452 **      return CONTINUE;
 453 **
 454 */
 455
 456         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 457         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 458         op->o_bd->bd_info = (BackendInfo *) on;
 459
 460         if(e && rc == LDAP_SUCCESS) {
 461                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 462                 for(mm = &op->orm_modlist; *mm; ) {
 463                         m = *mm;
 464                         for(a = e->e_attrs; a; a = a->a_next)
 465                                 if(a->a_desc == m->sml_desc) break;
 466                         if(a) {
 467                                 mm = &m->sml_next;
 468                                 continue;               /* found local attr */
 469                         }
 470                         if(m->sml_op == LDAP_MOD_DELETE) {
 471                                 for(a = re->e_attrs; a; a = a->a_next)
 472                                         if(a->a_desc == m->sml_desc) break;
 473                                 /* not found remote attr */
 474                                 if(!a) {
 475                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 476                                         goto release;
 477                                 }
 478                                 if(ov->strict) {
 479                                         erc = LDAP_CONSTRAINT_VIOLATION;
 480                                         goto release;
 481                                 }
 482                                 Debug(LDAP_DEBUG_TRACE,
 483                                         "=> translucent_modify: silently dropping delete: %s\n",
 484                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 485                                 *mm = m->sml_next;
 486                                 m->sml_next = NULL;
 487                                 slap_mods_free(m, 1);
 488                                 continue;
 489                         }
 490                         m->sml_op = LDAP_MOD_ADD;
 491                         mm = &m->sml_next;
 492                 }
 493                 erc = SLAP_CB_CONTINUE;
 494 release:
 495                 if(re) {
 496                         if(ov->db.bd_info->bi_entry_release_rw) {
 497                                 op->o_bd = &ov->db;
 498                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 499                                 op->o_bd = db;
 500                         } else
 501                                 entry_free(re);
 502                 }
 503                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 504                 be_entry_release_r(op, e);
 505                 op->o_bd->bd_info = (BackendInfo *) on;
 506                 if(erc == SLAP_CB_CONTINUE) {
 507                         return(erc);
 508                 } else if(erc) {
 509                         send_ldap_error(op, rs, erc,
 510                                 "attempt to delete nonexistent attribute");
 511                         return(erc);
 512                 }
 513         }
 514
 515         /* don't leak remote entry copy */
 516         if(re) {
 517                 if(ov->db.bd_info->bi_entry_release_rw) {
 518                         op->o_bd = &ov->db;
 519                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 520                         op->o_bd = db;
 521                 } else
 522                         entry_free(re);
 523         }
 524 /*
 525 ** foreach Modification:
 526 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 527 ** if no Modifications were suitable:
 528 **      if strict, throw CONSTRAINT_VIOLATION;
 529 **      else, return early SUCCESS;
 530 ** fabricate Entry with new Attribute chain;
 531 ** glue_parent() for this Entry;
 532 ** call bi_op_add() in local backend;
 533 **
 534 */
 535
 536         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 537         a = NULL;
 538         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 539                 Attribute atmp;
 540                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 541                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 542                         Debug(LDAP_DEBUG_ANY,
 543                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 544                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 545                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 546                         continue;
 547                 }
 548                 atmp.a_desc = m->sml_desc;
 549                 atmp.a_vals = m->sml_values;
 550                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 551                 atmp.a_numvals = m->sml_numvals;
 552                 atmp.a_flags = 0;
 553                 a = attr_dup( &atmp );
 554                 a->a_next  = ax;
 555                 ax = a;
 556         }
 557
 558         if(del && ov->strict) {
 559                 attrs_free( a );
 560                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 561                         "attempt to delete attributes from local database");
 562                 return(rs->sr_err);
 563         }
 564
 565         if(!ax) {
 566                 if(ov->strict) {
 567                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 568                                 "modification contained other than ADD or REPLACE");
 569                         return(rs->sr_err);
 570                 }
 571                 /* rs->sr_text = "no valid modification found"; */
 572                 rs->sr_err = LDAP_SUCCESS;
 573                 send_ldap_result(op, rs);
 574                 return(rs->sr_err);
 575         }
 576
 577         e = entry_alloc();
 578         ber_dupbv( &e->e_name, &op->o_req_dn );
 579         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 580         e->e_attrs = a;
 581
 582         op->o_tag       = LDAP_REQ_ADD;
 583         cb.sc_response = translucent_tag_cb;
 584         cb.sc_private = op->orm_modlist;
 585         op->oq_add.rs_e = e;
 586
 587         glue_parent(op);
 588
 589         cb.sc_next = op->o_callback;
 590         op->o_callback = &cb;
 591         rc = on->on_info->oi_orig->bi_op_add(op, &nrs);
 592         if ( op->ora_e == e )
 593                 entry_free( e );
 594         op->o_callback = cb.sc_next;
 595
 596         return(rc);
 597 }
 598
 599 static int translucent_compare(Operation *op, SlapReply *rs) {
 600         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 601         translucent_info *ov = on->on_bi.bi_private;
 602         AttributeAssertion *ava = op->orc_ava;
 603         Entry *e;
 604         BackendDB *db;
 605         int rc;
 606
 607         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 608                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 609
 610 /*
 611 ** if the local backend has an entry for this attribute:
 612 **      CONTINUE and let it do the compare;
 613 **
 614 */
 615         rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on);
 616         if(rc == LDAP_SUCCESS && e) {
 617                 overlay_entry_release_ov(op, e, 0, on);
 618                 return(SLAP_CB_CONTINUE);
 619         }
 620
 621         if(ov->defer_db_open) {
 622                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 623                         "remote DB not available");
 624                 return(rs->sr_err);
 625         }
 626 /*
 627 ** call compare() in the captive backend;
 628 ** return the result;
 629 **
 630 */
 631         db = op->o_bd;
 632         op->o_bd = &ov->db;
 633         rc = ov->db.bd_info->bi_op_compare(op, rs);
 634         op->o_bd = db;
 635
 636         return(rc);
 637 }
 638
 639 /*
 640 ** translucent_search_cb()
 641 **      merge local data with remote data
 642 **
 643 ** Four cases:
 644 ** 1: remote search, no local filter
 645 **      merge data and send immediately
 646 ** 2: remote search, with local filter
 647 **      merge data and save
 648 ** 3: local search, no remote filter
 649 **      merge data and send immediately
 650 ** 4: local search, with remote filter
 651 **      check list, merge, send, delete
 652 */
 653
 654 #define RMT_SIDE        0
 655 #define LCL_SIDE        1
 656 #define USE_LIST        2
 657
 658 typedef struct trans_ctx {
 659         BackendDB *db;
 660         slap_overinst *on;
 661         Filter *orig;
 662         Avlnode *list;
 663         int step;
 664 } trans_ctx;
 665
 666 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 667         trans_ctx *tc;
 668         BackendDB *db;
 669         slap_overinst *on;
 670         translucent_info *ov;
 671         Entry *le, *re;
 672         Attribute *a, *ax, *an, *as = NULL;
 673         int rc;
 674         int test_f = 0;
 675
 676         tc = op->o_callback->sc_private;
 677
 678         /* Don't let the op complete while we're gathering data */
 679         if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
 680                 return 0;
 681
 682         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 683                 return(SLAP_CB_CONTINUE);
 684
 685         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 686                 rs->sr_entry->e_name.bv_val, 0, 0);
 687
 688         on = tc->on;
 689         ov = on->on_bi.bi_private;
 690
 691         db = op->o_bd;
 692         re = NULL;
 693
 694         /* If we have local, get remote */
 695         if ( tc->step & LCL_SIDE ) {
 696                 le = rs->sr_entry;
 697                 /* If entry is already on list, use it */
 698                 if ( tc->step & USE_LIST ) {
 699                         re = tavl_delete( &tc->list, le, entry_dn_cmp );
 700                         if ( re ) {
 701                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 702                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 703                                         be_entry_release_r( op, rs->sr_entry );
 704                                 }
 705                                 if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 706                                         rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 707                                         entry_free( rs->sr_entry );
 708                                 }
 709                                 rc = test_filter( op, re, tc->orig );
 710                                 if ( rc == LDAP_COMPARE_TRUE ) {
 711                                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 712                                         rs->sr_entry = re;
 713                                         return SLAP_CB_CONTINUE;
 714                                 } else {
 715                                         entry_free( re );
 716                                         rs->sr_entry = NULL;
 717                                         return 0;
 718                                 }
 719                         }
 720                 }
 721                 op->o_bd = &ov->db;
 722                 rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
 723                 if ( rc == LDAP_SUCCESS && re ) {
 724                         Entry *tmp = entry_dup( re );
 725                         be_entry_release_r( op, re );
 726                         re = tmp;
 727                         test_f = 1;
 728                 }
 729         } else {
 730         /* Else we have remote, get local */
 731                 op->o_bd = tc->db;
 732                 rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
 733                 if ( rc == LDAP_SUCCESS && le ) {
 734                         re = entry_dup( rs->sr_entry );
 735                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 736                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 737                                 be_entry_release_r( op, rs->sr_entry );
 738                         }
 739                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 740                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 741                                 entry_free( rs->sr_entry );
 742                         }
 743                 } else {
 744                         le = NULL;
 745                 }
 746         }
 747
 748 /*
 749 ** if we got remote and local entry:
 750 **      foreach local attr:
 751 **              foreach remote attr:
 752 **                      if match, remote attr with local attr;
 753 **                      if new local, add to list;
 754 **      append new local attrs to remote;
 755 **
 756 */
 757
 758         if ( re && le ) {
 759                 for(ax = le->e_attrs; ax; ax = ax->a_next) {
 760                         for(a = re->e_attrs; a; a = a->a_next) {
 761                                 if(a->a_desc == ax->a_desc) {
 762                                         if(a->a_vals != a->a_nvals)
 763                                                 ber_bvarray_free(a->a_nvals);
 764                                         ber_bvarray_free(a->a_vals);
 765                                         a->a_vals = dup_bervarray(ax->a_vals);
 766                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 767                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 768                                         break;
 769                                 }
 770                         }
 771                         if(a) continue;
 772                         an = attr_dup(ax);
 773                         an->a_next = as;
 774                         as = an;
 775                 }
 776                 /* Dispose of local entry */
 777                 if ( tc->step & LCL_SIDE ) {
 778                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 779                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 780                                 be_entry_release_r( op, rs->sr_entry );
 781                         }
 782                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 783                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 784                                 entry_free( rs->sr_entry );
 785                         }
 786                 } else {
 787                         overlay_entry_release_ov(op, le, 0, on);
 788                 }
 789
 790                 /* literally append, so locals are always last */
 791                 if(as) {
 792                         if(re->e_attrs) {
 793                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 794                                 ax->a_next = as;
 795                         } else {
 796                                 re->e_attrs = as;
 797                         }
 798                 }
 799                 /* If both filters, save entry for later */
 800                 if ( tc->step == (USE_LIST|RMT_SIDE) ) {
 801                         tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error );
 802                         rs->sr_entry = NULL;
 803                         rc = 0;
 804                 } else {
 805                 /* send it now */
 806                         rs->sr_entry = re;
 807                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 808                         if ( test_f ) {
 809                                 rc = test_filter( op, rs->sr_entry, tc->orig );
 810                                 if ( rc == LDAP_COMPARE_TRUE ) {
 811                                         rc = SLAP_CB_CONTINUE;
 812                                 } else {
 813                                         rc = 0;
 814                                 }
 815                         } else {
 816                                 rc = SLAP_CB_CONTINUE;
 817                         }
 818                 }
 819         } else if ( le ) {
 820         /* Only a local entry: remote was deleted
 821          * Ought to delete the local too...
 822          */
 823                 rc = 0;
 824         } else if ( tc->step & USE_LIST ) {
 825         /* Only a remote entry, but both filters:
 826          * Test the complete filter
 827          */
 828                 rc = test_filter( op, rs->sr_entry, tc->orig );
 829                 if ( rc == LDAP_COMPARE_TRUE ) {
 830                         rc = SLAP_CB_CONTINUE;
 831                 } else {
 832                         rc = 0;
 833                 }
 834         } else {
 835         /* Only a remote entry, only remote filter:
 836          * just pass thru
 837          */
 838                 rc = SLAP_CB_CONTINUE;
 839         }
 840
 841         op->o_bd = db;
 842         return rc;
 843 }
 844
 845 /* Dup the filter, excluding invalid elements */
 846 static Filter *
 847 trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
 848 {
 849         Filter *n = NULL;
 850
 851         if ( !f )
 852                 return NULL;
 853
 854         switch( f->f_choice & SLAPD_FILTER_MASK ) {
 855         case SLAPD_FILTER_COMPUTED:
 856                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 857                 n->f_choice = f->f_choice;
 858                 n->f_result = f->f_result;
 859                 n->f_next = NULL;
 860                 break;
 861
 862         case LDAP_FILTER_PRESENT:
 863                 if ( ad_inlist( f->f_desc, an )) {
 864                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 865                         n->f_choice = f->f_choice;
 866                         n->f_desc = f->f_desc;
 867                         n->f_next = NULL;
 868                 }
 869                 break;
 870
 871         case LDAP_FILTER_EQUALITY:
 872         case LDAP_FILTER_GE:
 873         case LDAP_FILTER_LE:
 874         case LDAP_FILTER_APPROX:
 875         case LDAP_FILTER_SUBSTRINGS:
 876         case LDAP_FILTER_EXT:
 877                 if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
 878                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 879                         n->f_choice = f->f_choice;
 880                         n->f_ava = f->f_ava;
 881                         n->f_next = NULL;
 882                 }
 883                 break;
 884
 885         case LDAP_FILTER_AND:
 886         case LDAP_FILTER_OR:
 887         case LDAP_FILTER_NOT: {
 888                 Filter **p;
 889
 890                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 891                 n->f_choice = f->f_choice;
 892                 n->f_next = NULL;
 893
 894                 for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
 895                         *p = trans_filter_dup( op, f, an );
 896                         if ( !*p )
 897                                 continue;
 898                         p = &(*p)->f_next;
 899                 }
 900                 /* nothing valid in this list */
 901                 if ( !n->f_list ) {
 902                         op->o_tmpfree( n, op->o_tmpmemctx );
 903                         return NULL;
 904                 }
 905                 /* Only 1 element in this list */
 906                 if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
 907                         !n->f_list->f_next ) {
 908                         f = n->f_list;
 909                         *n = *f;
 910                         op->o_tmpfree( f, op->o_tmpmemctx );
 911                 }
 912                 break;
 913         }
 914         }
 915         return n;
 916 }
 917
 918 static void
 919 trans_filter_free( Operation *op, Filter *f )
 920 {
 921         Filter *n, *p, *next;
 922
 923         f->f_choice &= SLAPD_FILTER_MASK;
 924
 925         switch( f->f_choice ) {
 926         case LDAP_FILTER_AND:
 927         case LDAP_FILTER_OR:
 928         case LDAP_FILTER_NOT:
 929                 /* Free in reverse order */
 930                 n = NULL;
 931                 for ( p = f->f_list; p; p = next ) {
 932                         next = p->f_next;
 933                         p->f_next = n;
 934                         n = p;
 935                 }
 936                 for ( p = n; p; p = next ) {
 937                         next = p->f_next;
 938                         trans_filter_free( op, p );
 939                 }
 940                 break;
 941         default:
 942                 break;
 943         }
 944         op->o_tmpfree( f, op->o_tmpmemctx );
 945 }
 946
 947 /*
 948 ** translucent_search()
 949 **      search via captive backend;
 950 **      override results with any local data;
 951 **
 952 */
 953
 954 static int translucent_search(Operation *op, SlapReply *rs) {
 955         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 956         translucent_info *ov = on->on_bi.bi_private;
 957         slap_callback cb = { NULL, NULL, NULL, NULL };
 958         trans_ctx tc;
 959         Filter *fl, *fr;
 960         struct berval fbv;
 961         int rc = 0;
 962
 963         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 964                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 965
 966         if(ov->defer_db_open) {
 967                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 968                         "remote DB not available");
 969                 return(rs->sr_err);
 970         }
 971
 972         fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
 973         fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
 974         cb.sc_response = (slap_response *) translucent_search_cb;
 975         cb.sc_private = &tc;
 976         cb.sc_next = op->o_callback;
 977
 978         tc.db = op->o_bd;
 979         tc.on = on;
 980         tc.orig = op->ors_filter;
 981         tc.list = NULL;
 982         tc.step = 0;
 983         fbv = op->ors_filterstr;
 984
 985         op->o_callback = &cb;
 986
 987         if ( fr || !fl ) {
 988                 op->o_bd = &ov->db;
 989                 tc.step |= RMT_SIDE;
 990                 if ( fl ) {
 991                         tc.step |= USE_LIST;
 992                         op->ors_filter = fr;
 993                         filter2bv_x( op, fr, &op->ors_filterstr );
 994                 }
 995                 rc = ov->db.bd_info->bi_op_search(op, rs);
 996                 op->o_bd = tc.db;
 997                 if ( fl ) {
 998                         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 999                 }
1000         }
1001         if ( fl && !rc ) {
1002                 tc.step |= LCL_SIDE;
1003                 op->ors_filter = fl;
1004                 filter2bv_x( op, fl, &op->ors_filterstr );
1005                 rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
1006                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1007         }
1008         op->ors_filterstr = fbv;
1009         op->ors_filter = tc.orig;
1010         op->o_callback = cb.sc_next;
1011         /* Send out anything remaining on the list and finish */
1012         if ( tc.step & USE_LIST ) {
1013                 if ( tc.list ) {
1014                         Avlnode *av;
1015
1016                         av = tavl_end( tc.list, TAVL_DIR_LEFT );
1017                         while ( av ) {
1018                                 rs->sr_entry = av->avl_data;
1019                                 rc = test_filter( op, rs->sr_entry, op->ors_filter );
1020                                 if ( rc == LDAP_COMPARE_TRUE ) {
1021                                         rs->sr_flags = REP_ENTRY_MUSTBEFREED;
1022                                         rc = send_search_entry( op, rs );
1023                                         if ( rc ) break;
1024                                 } else {
1025                                         entry_free( rs->sr_entry );
1026                                 }
1027                                 av = tavl_next( av, TAVL_DIR_RIGHT );
1028                         }
1029                         tavl_free( tc.list, NULL );
1030                         rs->sr_entry = NULL;
1031                 }
1032                 send_ldap_result( op, rs );
1033         }
1034
1035         /* Free in reverse order */
1036         if ( fl )
1037                 trans_filter_free( op, fl );
1038         if ( fr )
1039                 trans_filter_free( op, fr );
1040
1041         return rc;
1042 }
1043
1044
1045 /*
1046 ** translucent_bind()
1047 **      pass bind request to captive backend;
1048 **
1049 */
1050
1051 static int translucent_bind(Operation *op, SlapReply *rs) {
1052         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1053         translucent_info *ov = on->on_bi.bi_private;
1054         BackendDB *db;
1055         slap_callback sc = { 0 }, *save_cb;
1056         int rc;
1057
1058         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
1059                 op->o_req_dn.bv_val, op->orb_method, 0);
1060
1061         if(ov->defer_db_open) {
1062                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1063                         "remote DB not available");
1064                 return(rs->sr_err);
1065         }
1066
1067         if (ov->bind_local) {
1068                 sc.sc_response = slap_null_cb;
1069                 save_cb = op->o_callback;
1070                 op->o_callback = &sc;
1071         }
1072
1073         db = op->o_bd;
1074         op->o_bd = &ov->db;
1075         rc = ov->db.bd_info->bi_op_bind(op, rs);
1076         op->o_bd = db;
1077
1078         if (ov->bind_local) {
1079                 op->o_callback = save_cb;
1080                 if (rc != LDAP_SUCCESS) {
1081                         rc = SLAP_CB_CONTINUE;
1082                 }
1083         }
1084
1085         return rc;
1086 }
1087
1088 /*
1089 ** translucent_connection_destroy()
1090 **      pass disconnect notification to captive backend;
1091 **
1092 */
1093
1094 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
1095         slap_overinst *on = (slap_overinst *) be->bd_info;
1096         translucent_info *ov = on->on_bi.bi_private;
1097         int rc = 0;
1098
1099         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
1100
1101         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
1102
1103         return(rc);
1104 }
1105
1106 /*
1107 ** translucent_db_config()
1108 **      pass config directives to captive backend;
1109 **      parse unrecognized directives ourselves;
1110 **
1111 */
1112
1113 static int translucent_db_config(
1114         BackendDB       *be,
1115         const char      *fname,
1116         int             lineno,
1117         int             argc,
1118         char            **argv
1119 )
1120 {
1121         slap_overinst *on = (slap_overinst *) be->bd_info;
1122         translucent_info *ov = on->on_bi.bi_private;
1123
1124         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
1125               argc ? argv[0] : "", 0, 0);
1126
1127         /* Something for the captive database? */
1128         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
1129                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
1130                         argc, argv );
1131         return SLAP_CONF_UNKNOWN;
1132 }
1133
1134 /*
1135 ** translucent_db_init()
1136 **      initialize the captive backend;
1137 **
1138 */
1139
1140 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
1141         slap_overinst *on = (slap_overinst *) be->bd_info;
1142         translucent_info *ov;
1143
1144         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
1145
1146         ov = ch_calloc(1, sizeof(translucent_info));
1147         on->on_bi.bi_private = ov;
1148         ov->db = *be;
1149         ov->db.be_private = NULL;
1150         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
1151         ov->defer_db_open = 1;
1152
1153         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
1154                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
1155                 return 1;
1156         }
1157         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
1158         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
1159
1160         return 0;
1161 }
1162
1163 /*
1164 ** translucent_db_open()
1165 **      if the captive backend has an open() method, call it;
1166 **
1167 */
1168
1169 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
1170         slap_overinst *on = (slap_overinst *) be->bd_info;
1171         translucent_info *ov = on->on_bi.bi_private;
1172         int rc;
1173
1174         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
1175
1176         /* need to inherit something from the original database... */
1177         ov->db.be_def_limit = be->be_def_limit;
1178         ov->db.be_limits = be->be_limits;
1179         ov->db.be_acl = be->be_acl;
1180         ov->db.be_dfltaccess = be->be_dfltaccess;
1181
1182         if ( ov->defer_db_open )
1183                 return 0;
1184
1185         rc = backend_startup_one( &ov->db, cr );
1186
1187         if(rc) Debug(LDAP_DEBUG_TRACE,
1188                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
1189
1190         return(rc);
1191 }
1192
1193 /*
1194 ** translucent_db_close()
1195 **      if the captive backend has a close() method, call it
1196 **
1197 */
1198
1199 static int
1200 translucent_db_close( BackendDB *be, ConfigReply *cr )
1201 {
1202         slap_overinst *on = (slap_overinst *) be->bd_info;
1203         translucent_info *ov = on->on_bi.bi_private;
1204         int rc = 0;
1205
1206         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
1207
1208         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
1209                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
1210         }
1211
1212         return(rc);
1213 }
1214
1215 /*
1216 ** translucent_db_destroy()
1217 **      if the captive backend has a db_destroy() method, call it;
1218 **      free any config data
1219 **
1220 */
1221
1222 static int
1223 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
1224 {
1225         slap_overinst *on = (slap_overinst *) be->bd_info;
1226         translucent_info *ov = on->on_bi.bi_private;
1227         int rc = 0;
1228
1229         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
1230
1231         if ( ov ) {
1232                 if ( ov->remote )
1233                         anlist_free( ov->remote, 1, NULL );
1234                 if ( ov->local )
1235                         anlist_free( ov->local, 1, NULL );
1236                 if ( ov->db.be_private != NULL ) {
1237                         backend_stopdown_one( &ov->db );
1238                 }
1239
1240                 ch_free(ov);
1241                 on->on_bi.bi_private = NULL;
1242         }
1243
1244         return(rc);
1245 }
1246
1247 /*
1248 ** translucent_initialize()
1249 **      initialize the slap_overinst with our entry points;
1250 **
1251 */
1252
1253 int translucent_initialize() {
1254
1255         int rc;
1256
1257         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
1258
1259         translucent.on_bi.bi_type       = "translucent";
1260         translucent.on_bi.bi_db_init    = translucent_db_init;
1261         translucent.on_bi.bi_db_config  = translucent_db_config;
1262         translucent.on_bi.bi_db_open    = translucent_db_open;
1263         translucent.on_bi.bi_db_close   = translucent_db_close;
1264         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
1265         translucent.on_bi.bi_op_bind    = translucent_bind;
1266         translucent.on_bi.bi_op_add     = translucent_add;
1267         translucent.on_bi.bi_op_modify  = translucent_modify;
1268         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
1269         translucent.on_bi.bi_op_delete  = translucent_delete;
1270         translucent.on_bi.bi_op_search  = translucent_search;
1271         translucent.on_bi.bi_op_compare = translucent_compare;
1272         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
1273
1274         translucent.on_bi.bi_cf_ocs = translucentocs;
1275         rc = config_register_schema ( translucentcfg, translucentocs );
1276         if ( rc ) return rc;
1277
1278         return(overlay_register(&translucent));
1279 }
1280
1281 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
1282 int init_module(int argc, char *argv[]) {
1283         return translucent_initialize();
1284 }
1285 #endif
1286
1287 #endif /* SLAPD_OVER_TRANSLUCENT */