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         int pwmod_local;
  46 } translucent_info;
  47
  48 static ConfigLDAPadd translucent_ldadd;
  49 static ConfigCfAdd translucent_cfadd;
  50
  51 static ConfigDriver translucent_cf_gen;
  52
  53 enum {
  54         TRANS_LOCAL = 1,
  55         TRANS_REMOTE
  56 };
  57
  58 static ConfigTable translucentcfg[] = {
  59         { "translucent_strict", "on|off", 1, 2, 0,
  60           ARG_ON_OFF|ARG_OFFSET,
  61           (void *)offsetof(translucent_info, strict),
  62           "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
  63           "DESC 'Reveal attribute deletion constraint violations' "
  64           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  65         { "translucent_no_glue", "on|off", 1, 2, 0,
  66           ARG_ON_OFF|ARG_OFFSET,
  67           (void *)offsetof(translucent_info, no_glue),
  68           "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
  69           "DESC 'Disable automatic glue records for ADD and MODRDN' "
  70           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  71         { "translucent_local", "attr[,attr...]", 1, 2, 0,
  72           ARG_MAGIC|TRANS_LOCAL,
  73           translucent_cf_gen,
  74           "( OLcfgOvAt:14.3 NAME 'olcTranslucentLocal' "
  75           "DESC 'Attributes to use in local search filter' "
  76           "SYNTAX OMsDirectoryString )", NULL, NULL },
  77         { "translucent_remote", "attr[,attr...]", 1, 2, 0,
  78           ARG_MAGIC|TRANS_REMOTE,
  79           translucent_cf_gen,
  80           "( OLcfgOvAt:14.4 NAME 'olcTranslucentRemote' "
  81           "DESC 'Attributes to use in remote search filter' "
  82           "SYNTAX OMsDirectoryString )", NULL, NULL },
  83         { "translucent_bind_local", "on|off", 1, 2, 0,
  84           ARG_ON_OFF|ARG_OFFSET,
  85           (void *)offsetof(translucent_info, bind_local),
  86           "( OLcfgOvAt:14.5 NAME 'olcTranslucentBindLocal' "
  87           "DESC 'Enable local bind' "
  88           "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
  89         { "translucent_pwmod_local", "on|off", 1, 2, 0,
  90           ARG_ON_OFF|ARG_OFFSET,
  91           (void *)offsetof(translucent_info, pwmod_local),
  92           "( OLcfgOvAt:14.6 NAME 'olcTranslucentPwModLocal' "
  93           "DESC 'Enable local RFC 3062 Password Modify extended operation' "
  94           "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
  95         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  96 };
  97
  98 static ConfigOCs translucentocs[] = {
  99         { "( OLcfgOvOc:14.1 "
 100           "NAME 'olcTranslucentConfig' "
 101           "DESC 'Translucent configuration' "
 102           "SUP olcOverlayConfig "
 103           "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue $"
 104           " olcTranslucentLocal $ olcTranslucentRemote $"
 105           " olcTranslucentBindLocal $ olcTranslucentPwModLocal ) )",
 106           Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
 107         { "( OLcfgOvOc:14.2 "
 108           "NAME 'olcTranslucentDatabase' "
 109           "DESC 'Translucent target database configuration' "
 110           "AUXILIARY )", Cft_Misc, olcDatabaseDummy, translucent_ldadd },
 111         { NULL, 0, NULL }
 112 };
 113 /* for translucent_init() */
 114
 115 static int
 116 translucent_ldadd_cleanup( ConfigArgs *ca )
 117 {
 118         slap_overinst *on = ca->ca_private;
 119         translucent_info *ov = on->on_bi.bi_private;
 120
 121         ov->defer_db_open = 0;
 122         return backend_startup_one( ca->be, &ca->reply );
 123 }
 124
 125 static int
 126 translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
 127 {
 128         slap_overinst *on;
 129         translucent_info *ov;
 130
 131         Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
 132
 133         if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
 134              cei->ce_bi->bi_cf_ocs != translucentocs )
 135                 return LDAP_CONSTRAINT_VIOLATION;
 136
 137         on = (slap_overinst *)cei->ce_bi;
 138         ov = on->on_bi.bi_private;
 139         ca->be = &ov->db;
 140         ca->ca_private = on;
 141         if ( CONFIG_ONLINE_ADD( ca ))
 142                 ca->cleanup = translucent_ldadd_cleanup;
 143         else
 144                 ov->defer_db_open = 0;
 145
 146         return LDAP_SUCCESS;
 147 }
 148
 149 static int
 150 translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
 151 {
 152         CfEntryInfo *cei = e->e_private;
 153         slap_overinst *on = (slap_overinst *)cei->ce_bi;
 154         translucent_info *ov = on->on_bi.bi_private;
 155         struct berval bv;
 156
 157         Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
 158
 159         /* FIXME: should not hardcode "olcDatabase" here */
 160         bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
 161                 "olcDatabase=%s", ov->db.bd_info->bi_type );
 162         if ( bv.bv_len < 0 || bv.bv_len >= sizeof( ca->cr_msg ) ) {
 163                 return -1;
 164         }
 165         bv.bv_val = ca->cr_msg;
 166         ca->be = &ov->db;
 167         ov->defer_db_open = 0;
 168
 169         /* We can only create this entry if the database is table-driven
 170          */
 171         if ( ov->db.bd_info->bi_cf_ocs )
 172                 config_build_entry( op, rs, cei, ca, &bv,
 173                                     ov->db.bd_info->bi_cf_ocs,
 174                                     &translucentocs[1] );
 175
 176         return 0;
 177 }
 178
 179 static int
 180 translucent_cf_gen( ConfigArgs *c )
 181 {
 182         slap_overinst   *on = (slap_overinst *)c->bi;
 183         translucent_info *ov = on->on_bi.bi_private;
 184         AttributeName **an, *a2;
 185         int i;
 186
 187         if ( c->type == TRANS_LOCAL )
 188                 an = &ov->local;
 189         else
 190                 an = &ov->remote;
 191
 192         if ( c->op == SLAP_CONFIG_EMIT ) {
 193                 if ( !*an )
 194                         return 1;
 195                 for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) {
 196                         value_add_one( &c->rvalue_vals, &(*an)[i].an_name );
 197                 }
 198                 return ( i < 1 );
 199         } else if ( c->op == LDAP_MOD_DELETE ) {
 200                 if ( c->valx < 0 ) {
 201                         anlist_free( *an, 1, NULL );
 202                         *an = NULL;
 203                 } else {
 204                         i = c->valx;
 205                         ch_free( (*an)[i].an_name.bv_val );
 206                         do {
 207                                 (*an)[i] = (*an)[i+1];
 208                         } while ( !BER_BVISNULL( &(*an)[i].an_name ));
 209                 }
 210                 return 0;
 211         }
 212         a2 = str2anlist( *an, c->argv[1], "," );
 213         if ( !a2 ) {
 214                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s",
 215                         c->argv[0], c->argv[1] );
 216                 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 217                         "%s: %s\n", c->log, c->cr_msg, 0 );
 218                 return ARG_BAD_CONF;
 219         }
 220         *an = a2;
 221         return 0;
 222 }
 223
 224 static slap_overinst translucent;
 225
 226 /*
 227 ** glue_parent()
 228 **      call syncrepl_add_glue() with the parent suffix;
 229 **
 230 */
 231
 232 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 233
 234 void glue_parent(Operation *op) {
 235         Operation nop = *op;
 236         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 237         struct berval ndn = BER_BVNULL;
 238         Attribute *a;
 239         Entry *e;
 240         struct berval   pdn;
 241
 242         dnParent( &op->o_req_ndn, &pdn );
 243         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 244
 245         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 246
 247         e = entry_alloc();
 248         e->e_id = NOID;
 249         ber_dupbv(&e->e_name, &ndn);
 250         ber_dupbv(&e->e_nname, &ndn);
 251
 252         a = attr_alloc( slap_schema.si_ad_objectClass );
 253         a->a_numvals = 2;
 254         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 255         ber_dupbv(&a->a_vals[0], &glue[0]);
 256         ber_dupbv(&a->a_vals[1], &glue[1]);
 257         ber_dupbv(&a->a_vals[2], &glue[2]);
 258         a->a_nvals = a->a_vals;
 259         a->a_next = e->e_attrs;
 260         e->e_attrs = a;
 261
 262         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 263         a->a_numvals = 1;
 264         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 265         ber_dupbv(&a->a_vals[0], &glue[1]);
 266         ber_dupbv(&a->a_vals[1], &glue[2]);
 267         a->a_nvals = a->a_vals;
 268         a->a_next = e->e_attrs;
 269         e->e_attrs = a;
 270
 271         nop.o_req_dn = ndn;
 272         nop.o_req_ndn = ndn;
 273         nop.ora_e = e;
 274
 275         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 276         syncrepl_add_glue(&nop, e);
 277         nop.o_bd->bd_info = (BackendInfo *) on;
 278
 279         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 280
 281         return;
 282 }
 283
 284 /*
 285 ** dup_bervarray()
 286 **      copy a BerVarray;
 287 */
 288
 289 BerVarray dup_bervarray(BerVarray b) {
 290         int i, len;
 291         BerVarray nb;
 292         for(len = 0; b[len].bv_val; len++);
 293         nb = ch_malloc((len+1) * sizeof(BerValue));
 294         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 295         nb[len].bv_val = NULL;
 296         nb[len].bv_len = 0;
 297         return(nb);
 298 }
 299
 300 /*
 301 ** free_attr_chain()
 302 **      free only the Attribute*, not the contents;
 303 **
 304 */
 305 void free_attr_chain(Attribute *b) {
 306         Attribute *a;
 307         for(a=b; a; a=a->a_next) {
 308                 a->a_vals = NULL;
 309                 a->a_nvals = NULL;
 310         }
 311         attrs_free( b );
 312         return;
 313 }
 314
 315 /*
 316 ** translucent_add()
 317 **      if not bound as root, send ACCESS error;
 318 **      if glue, glue_parent();
 319 **      return CONTINUE;
 320 **
 321 */
 322
 323 static int translucent_add(Operation *op, SlapReply *rs) {
 324         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 325         translucent_info *ov = on->on_bi.bi_private;
 326         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 327                 op->o_req_dn.bv_val, 0, 0);
 328         if(!be_isroot(op)) {
 329                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 330                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 331                         "user modification of overlay database not permitted");
 332                 op->o_bd->bd_info = (BackendInfo *) on;
 333                 return(rs->sr_err);
 334         }
 335         if(!ov->no_glue) glue_parent(op);
 336         return(SLAP_CB_CONTINUE);
 337 }
 338
 339 /*
 340 ** translucent_modrdn()
 341 **      if not bound as root, send ACCESS error;
 342 **      if !glue, glue_parent();
 343 **      else return CONTINUE;
 344 **
 345 */
 346
 347 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 348         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 349         translucent_info *ov = on->on_bi.bi_private;
 350         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 351                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 352         if(!be_isroot(op)) {
 353                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 354                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 355                         "user modification of overlay database not permitted");
 356                 op->o_bd->bd_info = (BackendInfo *) on;
 357                 return(rs->sr_err);
 358         }
 359         if(!ov->no_glue) {
 360                 op->o_tag = LDAP_REQ_ADD;
 361                 glue_parent(op);
 362                 op->o_tag = LDAP_REQ_MODRDN;
 363         }
 364         return(SLAP_CB_CONTINUE);
 365 }
 366
 367 /*
 368 ** translucent_delete()
 369 **      if not bound as root, send ACCESS error;
 370 **      else return CONTINUE;
 371 **
 372 */
 373
 374 static int translucent_delete(Operation *op, SlapReply *rs) {
 375         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 376         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 377                 op->o_req_dn.bv_val, 0, 0);
 378         if(!be_isroot(op)) {
 379                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 380                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 381                         "user modification of overlay database not permitted");
 382                 op->o_bd->bd_info = (BackendInfo *) on;
 383                 return(rs->sr_err);
 384         }
 385         return(SLAP_CB_CONTINUE);
 386 }
 387
 388 static int
 389 translucent_tag_cb( Operation *op, SlapReply *rs )
 390 {
 391         op->o_tag = LDAP_REQ_MODIFY;
 392         op->orm_modlist = op->o_callback->sc_private;
 393         rs->sr_tag = slap_req2res( op->o_tag );
 394
 395         return SLAP_CB_CONTINUE;
 396 }
 397
 398 /*
 399 ** translucent_modify()
 400 **      modify in local backend if exists in both;
 401 **      otherwise, add to local backend;
 402 **      fail if not defined in captive backend;
 403 **
 404 */
 405
 406 static int translucent_modify(Operation *op, SlapReply *rs) {
 407         SlapReply nrs = { REP_RESULT };
 408
 409         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 410         translucent_info *ov = on->on_bi.bi_private;
 411         Entry *e = NULL, *re = NULL;
 412         Attribute *a, *ax;
 413         Modifications *m, **mm;
 414         BackendDB *db;
 415         int del, rc, erc = 0;
 416         slap_callback cb = { 0 };
 417
 418         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 419                 op->o_req_dn.bv_val, 0, 0);
 420
 421         if(ov->defer_db_open) {
 422                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 423                         "remote DB not available");
 424                 return(rs->sr_err);
 425         }
 426 /*
 427 ** fetch entry from the captive backend;
 428 ** if it did not exist, fail;
 429 ** release it, if captive backend supports this;
 430 **
 431 */
 432
 433         db = op->o_bd;
 434         op->o_bd = &ov->db;
 435         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 436         if(rc != LDAP_SUCCESS || re == NULL ) {
 437                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 438                         "attempt to modify nonexistent local record");
 439                 return(rs->sr_err);
 440         }
 441         op->o_bd = db;
 442 /*
 443 ** fetch entry from local backend;
 444 ** if it exists:
 445 **      foreach Modification:
 446 **          if attr not present in local:
 447 **              if Mod == LDAP_MOD_DELETE:
 448 **                  if remote attr not present, return NO_SUCH;
 449 **                  if remote attr present, drop this Mod;
 450 **              else force this Mod to LDAP_MOD_ADD;
 451 **      return CONTINUE;
 452 **
 453 */
 454
 455         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 456         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 457         op->o_bd->bd_info = (BackendInfo *) on;
 458
 459         if(e && rc == LDAP_SUCCESS) {
 460                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 461                 for(mm = &op->orm_modlist; *mm; ) {
 462                         m = *mm;
 463                         for(a = e->e_attrs; a; a = a->a_next)
 464                                 if(a->a_desc == m->sml_desc) break;
 465                         if(a) {
 466                                 mm = &m->sml_next;
 467                                 continue;               /* found local attr */
 468                         }
 469                         if(m->sml_op == LDAP_MOD_DELETE) {
 470                                 for(a = re->e_attrs; a; a = a->a_next)
 471                                         if(a->a_desc == m->sml_desc) break;
 472                                 /* not found remote attr */
 473                                 if(!a) {
 474                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 475                                         goto release;
 476                                 }
 477                                 if(ov->strict) {
 478                                         erc = LDAP_CONSTRAINT_VIOLATION;
 479                                         goto release;
 480                                 }
 481                                 Debug(LDAP_DEBUG_TRACE,
 482                                         "=> translucent_modify: silently dropping delete: %s\n",
 483                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 484                                 *mm = m->sml_next;
 485                                 m->sml_next = NULL;
 486                                 slap_mods_free(m, 1);
 487                                 continue;
 488                         }
 489                         m->sml_op = LDAP_MOD_ADD;
 490                         mm = &m->sml_next;
 491                 }
 492                 erc = SLAP_CB_CONTINUE;
 493 release:
 494                 if(re) {
 495                         if(ov->db.bd_info->bi_entry_release_rw) {
 496                                 op->o_bd = &ov->db;
 497                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 498                                 op->o_bd = db;
 499                         } else
 500                                 entry_free(re);
 501                 }
 502                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 503                 be_entry_release_r(op, e);
 504                 op->o_bd->bd_info = (BackendInfo *) on;
 505                 if(erc == SLAP_CB_CONTINUE) {
 506                         return(erc);
 507                 } else if(erc) {
 508                         send_ldap_error(op, rs, erc,
 509                                 "attempt to delete nonexistent attribute");
 510                         return(erc);
 511                 }
 512         }
 513
 514         /* don't leak remote entry copy */
 515         if(re) {
 516                 if(ov->db.bd_info->bi_entry_release_rw) {
 517                         op->o_bd = &ov->db;
 518                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 519                         op->o_bd = db;
 520                 } else
 521                         entry_free(re);
 522         }
 523 /*
 524 ** foreach Modification:
 525 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 526 ** if no Modifications were suitable:
 527 **      if strict, throw CONSTRAINT_VIOLATION;
 528 **      else, return early SUCCESS;
 529 ** fabricate Entry with new Attribute chain;
 530 ** glue_parent() for this Entry;
 531 ** call bi_op_add() in local backend;
 532 **
 533 */
 534
 535         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 536         a = NULL;
 537         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 538                 Attribute atmp;
 539                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 540                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 541                         Debug(LDAP_DEBUG_ANY,
 542                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 543                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 544                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 545                         continue;
 546                 }
 547                 atmp.a_desc = m->sml_desc;
 548                 atmp.a_vals = m->sml_values;
 549                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 550                 atmp.a_numvals = m->sml_numvals;
 551                 atmp.a_flags = 0;
 552                 a = attr_dup( &atmp );
 553                 a->a_next  = ax;
 554                 ax = a;
 555         }
 556
 557         if(del && ov->strict) {
 558                 attrs_free( a );
 559                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 560                         "attempt to delete attributes from local database");
 561                 return(rs->sr_err);
 562         }
 563
 564         if(!ax) {
 565                 if(ov->strict) {
 566                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 567                                 "modification contained other than ADD or REPLACE");
 568                         return(rs->sr_err);
 569                 }
 570                 /* rs->sr_text = "no valid modification found"; */
 571                 rs->sr_err = LDAP_SUCCESS;
 572                 send_ldap_result(op, rs);
 573                 return(rs->sr_err);
 574         }
 575
 576         e = entry_alloc();
 577         ber_dupbv( &e->e_name, &op->o_req_dn );
 578         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 579         e->e_attrs = a;
 580
 581         op->o_tag       = LDAP_REQ_ADD;
 582         cb.sc_response = translucent_tag_cb;
 583         cb.sc_private = op->orm_modlist;
 584         op->oq_add.rs_e = e;
 585
 586         glue_parent(op);
 587
 588         cb.sc_next = op->o_callback;
 589         op->o_callback = &cb;
 590         rc = on->on_info->oi_orig->bi_op_add(op, &nrs);
 591         if ( op->ora_e == e )
 592                 entry_free( e );
 593         op->o_callback = cb.sc_next;
 594
 595         return(rc);
 596 }
 597
 598 static int translucent_compare(Operation *op, SlapReply *rs) {
 599         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 600         translucent_info *ov = on->on_bi.bi_private;
 601         AttributeAssertion *ava = op->orc_ava;
 602         Entry *e;
 603         BackendDB *db;
 604         int rc;
 605
 606         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 607                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 608
 609 /*
 610 ** if the local backend has an entry for this attribute:
 611 **      CONTINUE and let it do the compare;
 612 **
 613 */
 614         rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on);
 615         if(rc == LDAP_SUCCESS && e) {
 616                 overlay_entry_release_ov(op, e, 0, on);
 617                 return(SLAP_CB_CONTINUE);
 618         }
 619
 620         if(ov->defer_db_open) {
 621                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 622                         "remote DB not available");
 623                 return(rs->sr_err);
 624         }
 625 /*
 626 ** call compare() in the captive backend;
 627 ** return the result;
 628 **
 629 */
 630         db = op->o_bd;
 631         op->o_bd = &ov->db;
 632         rc = ov->db.bd_info->bi_op_compare(op, rs);
 633         op->o_bd = db;
 634
 635         return(rc);
 636 }
 637
 638 static int translucent_pwmod(Operation *op, SlapReply *rs) {
 639         SlapReply nrs = { REP_RESULT };
 640         Operation nop;
 641
 642         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 643         translucent_info *ov = on->on_bi.bi_private;
 644         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 645         Entry *e = NULL, *re = NULL;
 646         BackendDB *db;
 647         int rc = 0;
 648         slap_callback cb = { 0 };
 649
 650         if (!ov->pwmod_local) {
 651                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION,
 652                 rs->sr_text = "attempt to modify password in local database";
 653                 return rs->sr_err;
 654         }
 655
 656 /*
 657 ** fetch entry from the captive backend;
 658 ** if it did not exist, fail;
 659 ** release it, if captive backend supports this;
 660 **
 661 */
 662         db = op->o_bd;
 663         op->o_bd = &ov->db;
 664         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 665         if(rc != LDAP_SUCCESS || re == NULL ) {
 666                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 667                         "attempt to modify nonexistent local record");
 668                 return(rs->sr_err);
 669         }
 670         op->o_bd = db;
 671 /*
 672 ** fetch entry from local backend;
 673 ** if it exists:
 674 **      return CONTINUE;
 675 */
 676
 677         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 678         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 679         op->o_bd->bd_info = (BackendInfo *) on;
 680
 681         if(e && rc == LDAP_SUCCESS) {
 682                 if(re) {
 683                         if(ov->db.bd_info->bi_entry_release_rw) {
 684                                 op->o_bd = &ov->db;
 685                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 686                                 op->o_bd = db;
 687                         } else {
 688                                 entry_free(re);
 689                         }
 690                 }
 691                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 692                 be_entry_release_r(op, e);
 693                 op->o_bd->bd_info = (BackendInfo *) on;
 694                 return SLAP_CB_CONTINUE;
 695         }
 696
 697         /* don't leak remote entry copy */
 698         if(re) {
 699                 if(ov->db.bd_info->bi_entry_release_rw) {
 700                         op->o_bd = &ov->db;
 701                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 702                         op->o_bd = db;
 703                 } else {
 704                         entry_free(re);
 705                 }
 706         }
 707 /*
 708 ** glue_parent() for this Entry;
 709 ** call bi_op_add() in local backend;
 710 **
 711 */
 712         e = entry_alloc();
 713         ber_dupbv( &e->e_name, &op->o_req_dn );
 714         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 715         e->e_attrs = NULL;
 716
 717         nop = *op;
 718         nop.o_tag = LDAP_REQ_ADD;
 719         cb.sc_response = slap_null_cb;
 720         nop.oq_add.rs_e = e;
 721
 722         glue_parent(&nop);
 723
 724         nop.o_callback = &cb;
 725         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 726         if ( nop.ora_e == e ) {
 727                 entry_free( e );
 728         }
 729
 730         if ( rc == LDAP_SUCCESS ) {
 731                 return SLAP_CB_CONTINUE;
 732         }
 733
 734         return rc;
 735 }
 736
 737 static int translucent_exop(Operation *op, SlapReply *rs) {
 738         SlapReply nrs = { REP_RESULT };
 739
 740         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 741         translucent_info *ov = on->on_bi.bi_private;
 742         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 743
 744         Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n",
 745                 op->o_req_dn.bv_val, 0, 0);
 746
 747         if(ov->defer_db_open) {
 748                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 749                         "remote DB not available");
 750                 return(rs->sr_err);
 751         }
 752
 753         if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) {
 754                 return translucent_pwmod( op, rs );
 755         }
 756
 757         return SLAP_CB_CONTINUE;
 758 }
 759
 760 /*
 761 ** translucent_search_cb()
 762 **      merge local data with remote data
 763 **
 764 ** Four cases:
 765 ** 1: remote search, no local filter
 766 **      merge data and send immediately
 767 ** 2: remote search, with local filter
 768 **      merge data and save
 769 ** 3: local search, no remote filter
 770 **      merge data and send immediately
 771 ** 4: local search, with remote filter
 772 **      check list, merge, send, delete
 773 */
 774
 775 #define RMT_SIDE        0
 776 #define LCL_SIDE        1
 777 #define USE_LIST        2
 778
 779 typedef struct trans_ctx {
 780         BackendDB *db;
 781         slap_overinst *on;
 782         Filter *orig;
 783         Avlnode *list;
 784         int step;
 785 } trans_ctx;
 786
 787 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 788         trans_ctx *tc;
 789         BackendDB *db;
 790         slap_overinst *on;
 791         translucent_info *ov;
 792         Entry *le, *re;
 793         Attribute *a, *ax, *an, *as = NULL;
 794         int rc;
 795         int test_f = 0;
 796
 797         tc = op->o_callback->sc_private;
 798
 799         /* Don't let the op complete while we're gathering data */
 800         if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
 801                 return 0;
 802
 803         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 804                 return(SLAP_CB_CONTINUE);
 805
 806         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 807                 rs->sr_entry->e_name.bv_val, 0, 0);
 808
 809         on = tc->on;
 810         ov = on->on_bi.bi_private;
 811
 812         db = op->o_bd;
 813         re = NULL;
 814
 815         /* If we have local, get remote */
 816         if ( tc->step & LCL_SIDE ) {
 817                 le = rs->sr_entry;
 818                 /* If entry is already on list, use it */
 819                 if ( tc->step & USE_LIST ) {
 820                         re = tavl_delete( &tc->list, le, entry_dn_cmp );
 821                         if ( re ) {
 822                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 823                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 824                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 825                                 }
 826                                 if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 827                                         rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 828                                         entry_free( rs->sr_entry );
 829                                 }
 830                                 rc = test_filter( op, re, tc->orig );
 831                                 if ( rc == LDAP_COMPARE_TRUE ) {
 832                                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 833                                         rs->sr_entry = re;
 834                                         return SLAP_CB_CONTINUE;
 835                                 } else {
 836                                         entry_free( re );
 837                                         rs->sr_entry = NULL;
 838                                         return 0;
 839                                 }
 840                         }
 841                 }
 842                 op->o_bd = &ov->db;
 843                 rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
 844                 if ( rc == LDAP_SUCCESS && re ) {
 845                         Entry *tmp = entry_dup( re );
 846                         be_entry_release_r( op, re );
 847                         re = tmp;
 848                         test_f = 1;
 849                 }
 850         } else {
 851         /* Else we have remote, get local */
 852                 op->o_bd = tc->db;
 853                 rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
 854                 if ( rc == LDAP_SUCCESS && le ) {
 855                         re = entry_dup( rs->sr_entry );
 856                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 857                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 858                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 859                         }
 860                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 861                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 862                                 entry_free( rs->sr_entry );
 863                         }
 864                 } else {
 865                         le = NULL;
 866                 }
 867         }
 868
 869 /*
 870 ** if we got remote and local entry:
 871 **      foreach local attr:
 872 **              foreach remote attr:
 873 **                      if match, remote attr with local attr;
 874 **                      if new local, add to list;
 875 **      append new local attrs to remote;
 876 **
 877 */
 878
 879         if ( re && le ) {
 880                 for(ax = le->e_attrs; ax; ax = ax->a_next) {
 881                         for(a = re->e_attrs; a; a = a->a_next) {
 882                                 if(a->a_desc == ax->a_desc) {
 883                                         if(a->a_vals != a->a_nvals)
 884                                                 ber_bvarray_free(a->a_nvals);
 885                                         ber_bvarray_free(a->a_vals);
 886                                         a->a_vals = dup_bervarray(ax->a_vals);
 887                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 888                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 889                                         break;
 890                                 }
 891                         }
 892                         if(a) continue;
 893                         an = attr_dup(ax);
 894                         an->a_next = as;
 895                         as = an;
 896                 }
 897                 /* Dispose of local entry */
 898                 if ( tc->step & LCL_SIDE ) {
 899                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 900                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 901                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 902                         }
 903                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 904                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 905                                 entry_free( rs->sr_entry );
 906                         }
 907                 } else {
 908                         overlay_entry_release_ov(op, le, 0, on);
 909                 }
 910
 911                 /* literally append, so locals are always last */
 912                 if(as) {
 913                         if(re->e_attrs) {
 914                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 915                                 ax->a_next = as;
 916                         } else {
 917                                 re->e_attrs = as;
 918                         }
 919                 }
 920                 /* If both filters, save entry for later */
 921                 if ( tc->step == (USE_LIST|RMT_SIDE) ) {
 922                         tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error );
 923                         rs->sr_entry = NULL;
 924                         rc = 0;
 925                 } else {
 926                 /* send it now */
 927                         rs->sr_entry = re;
 928                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 929                         if ( test_f ) {
 930                                 rc = test_filter( op, rs->sr_entry, tc->orig );
 931                                 if ( rc == LDAP_COMPARE_TRUE ) {
 932                                         rc = SLAP_CB_CONTINUE;
 933                                 } else {
 934                                         rc = 0;
 935                                 }
 936                         } else {
 937                                 rc = SLAP_CB_CONTINUE;
 938                         }
 939                 }
 940         } else if ( le ) {
 941         /* Only a local entry: remote was deleted
 942          * Ought to delete the local too...
 943          */
 944                 rc = 0;
 945         } else if ( tc->step & USE_LIST ) {
 946         /* Only a remote entry, but both filters:
 947          * Test the complete filter
 948          */
 949                 rc = test_filter( op, rs->sr_entry, tc->orig );
 950                 if ( rc == LDAP_COMPARE_TRUE ) {
 951                         rc = SLAP_CB_CONTINUE;
 952                 } else {
 953                         rc = 0;
 954                 }
 955         } else {
 956         /* Only a remote entry, only remote filter:
 957          * just pass thru
 958          */
 959                 rc = SLAP_CB_CONTINUE;
 960         }
 961
 962         op->o_bd = db;
 963         return rc;
 964 }
 965
 966 /* Dup the filter, excluding invalid elements */
 967 static Filter *
 968 trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
 969 {
 970         Filter *n = NULL;
 971
 972         if ( !f )
 973                 return NULL;
 974
 975         switch( f->f_choice & SLAPD_FILTER_MASK ) {
 976         case SLAPD_FILTER_COMPUTED:
 977                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 978                 n->f_choice = f->f_choice;
 979                 n->f_result = f->f_result;
 980                 n->f_next = NULL;
 981                 break;
 982
 983         case LDAP_FILTER_PRESENT:
 984                 if ( ad_inlist( f->f_desc, an )) {
 985                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 986                         n->f_choice = f->f_choice;
 987                         n->f_desc = f->f_desc;
 988                         n->f_next = NULL;
 989                 }
 990                 break;
 991
 992         case LDAP_FILTER_EQUALITY:
 993         case LDAP_FILTER_GE:
 994         case LDAP_FILTER_LE:
 995         case LDAP_FILTER_APPROX:
 996         case LDAP_FILTER_SUBSTRINGS:
 997         case LDAP_FILTER_EXT:
 998                 if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
 999                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1000                         n->f_choice = f->f_choice;
1001                         n->f_ava = f->f_ava;
1002                         n->f_next = NULL;
1003                 }
1004                 break;
1005
1006         case LDAP_FILTER_AND:
1007         case LDAP_FILTER_OR:
1008         case LDAP_FILTER_NOT: {
1009                 Filter **p;
1010
1011                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1012                 n->f_choice = f->f_choice;
1013                 n->f_next = NULL;
1014
1015                 for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
1016                         *p = trans_filter_dup( op, f, an );
1017                         if ( !*p )
1018                                 continue;
1019                         p = &(*p)->f_next;
1020                 }
1021                 /* nothing valid in this list */
1022                 if ( !n->f_list ) {
1023                         op->o_tmpfree( n, op->o_tmpmemctx );
1024                         return NULL;
1025                 }
1026                 /* Only 1 element in this list */
1027                 if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
1028                         !n->f_list->f_next ) {
1029                         f = n->f_list;
1030                         *n = *f;
1031                         op->o_tmpfree( f, op->o_tmpmemctx );
1032                 }
1033                 break;
1034         }
1035         }
1036         return n;
1037 }
1038
1039 static void
1040 trans_filter_free( Operation *op, Filter *f )
1041 {
1042         Filter *n, *p, *next;
1043
1044         f->f_choice &= SLAPD_FILTER_MASK;
1045
1046         switch( f->f_choice ) {
1047         case LDAP_FILTER_AND:
1048         case LDAP_FILTER_OR:
1049         case LDAP_FILTER_NOT:
1050                 /* Free in reverse order */
1051                 n = NULL;
1052                 for ( p = f->f_list; p; p = next ) {
1053                         next = p->f_next;
1054                         p->f_next = n;
1055                         n = p;
1056                 }
1057                 for ( p = n; p; p = next ) {
1058                         next = p->f_next;
1059                         trans_filter_free( op, p );
1060                 }
1061                 break;
1062         default:
1063                 break;
1064         }
1065         op->o_tmpfree( f, op->o_tmpmemctx );
1066 }
1067
1068 /*
1069 ** translucent_search()
1070 **      search via captive backend;
1071 **      override results with any local data;
1072 **
1073 */
1074
1075 static int translucent_search(Operation *op, SlapReply *rs) {
1076         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1077         translucent_info *ov = on->on_bi.bi_private;
1078         slap_callback cb = { NULL, NULL, NULL, NULL };
1079         trans_ctx tc;
1080         Filter *fl, *fr;
1081         struct berval fbv;
1082         int rc = 0;
1083
1084         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
1085                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
1086
1087         if(ov->defer_db_open) {
1088                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1089                         "remote DB not available");
1090                 return(rs->sr_err);
1091         }
1092
1093         fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
1094         fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
1095         cb.sc_response = (slap_response *) translucent_search_cb;
1096         cb.sc_private = &tc;
1097         cb.sc_next = op->o_callback;
1098
1099         tc.db = op->o_bd;
1100         tc.on = on;
1101         tc.orig = op->ors_filter;
1102         tc.list = NULL;
1103         tc.step = 0;
1104         fbv = op->ors_filterstr;
1105
1106         op->o_callback = &cb;
1107
1108         if ( fr || !fl ) {
1109                 op->o_bd = &ov->db;
1110                 tc.step |= RMT_SIDE;
1111                 if ( fl ) {
1112                         tc.step |= USE_LIST;
1113                         op->ors_filter = fr;
1114                         filter2bv_x( op, fr, &op->ors_filterstr );
1115                 }
1116                 rc = ov->db.bd_info->bi_op_search(op, rs);
1117                 op->o_bd = tc.db;
1118                 if ( fl ) {
1119                         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1120                 }
1121         }
1122         if ( fl && !rc ) {
1123                 tc.step |= LCL_SIDE;
1124                 op->ors_filter = fl;
1125                 filter2bv_x( op, fl, &op->ors_filterstr );
1126                 rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
1127                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1128         }
1129         op->ors_filterstr = fbv;
1130         op->ors_filter = tc.orig;
1131         op->o_callback = cb.sc_next;
1132         /* Send out anything remaining on the list and finish */
1133         if ( tc.step & USE_LIST ) {
1134                 if ( tc.list ) {
1135                         Avlnode *av;
1136
1137                         av = tavl_end( tc.list, TAVL_DIR_LEFT );
1138                         while ( av ) {
1139                                 rs->sr_entry = av->avl_data;
1140                                 rc = test_filter( op, rs->sr_entry, op->ors_filter );
1141                                 if ( rc == LDAP_COMPARE_TRUE ) {
1142                                         rs->sr_flags = REP_ENTRY_MUSTBEFREED;
1143                                         rc = send_search_entry( op, rs );
1144                                         if ( rc ) break;
1145                                 } else {
1146                                         entry_free( rs->sr_entry );
1147                                 }
1148                                 av = tavl_next( av, TAVL_DIR_RIGHT );
1149                         }
1150                         tavl_free( tc.list, NULL );
1151                         rs->sr_entry = NULL;
1152                 }
1153                 send_ldap_result( op, rs );
1154         }
1155
1156         /* Free in reverse order */
1157         if ( fl )
1158                 trans_filter_free( op, fl );
1159         if ( fr )
1160                 trans_filter_free( op, fr );
1161
1162         return rc;
1163 }
1164
1165
1166 /*
1167 ** translucent_bind()
1168 **      pass bind request to captive backend;
1169 **
1170 */
1171
1172 static int translucent_bind(Operation *op, SlapReply *rs) {
1173         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1174         translucent_info *ov = on->on_bi.bi_private;
1175         BackendDB *db;
1176         slap_callback sc = { 0 }, *save_cb;
1177         int rc;
1178
1179         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
1180                 op->o_req_dn.bv_val, op->orb_method, 0);
1181
1182         if(ov->defer_db_open) {
1183                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1184                         "remote DB not available");
1185                 return(rs->sr_err);
1186         }
1187
1188         if (ov->bind_local) {
1189                 sc.sc_response = slap_null_cb;
1190                 save_cb = op->o_callback;
1191                 op->o_callback = &sc;
1192         }
1193
1194         db = op->o_bd;
1195         op->o_bd = &ov->db;
1196         rc = ov->db.bd_info->bi_op_bind(op, rs);
1197         op->o_bd = db;
1198
1199         if (ov->bind_local) {
1200                 op->o_callback = save_cb;
1201                 if (rc != LDAP_SUCCESS) {
1202                         rc = SLAP_CB_CONTINUE;
1203                 }
1204         }
1205
1206         return rc;
1207 }
1208
1209 /*
1210 ** translucent_connection_destroy()
1211 **      pass disconnect notification to captive backend;
1212 **
1213 */
1214
1215 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
1216         slap_overinst *on = (slap_overinst *) be->bd_info;
1217         translucent_info *ov = on->on_bi.bi_private;
1218         int rc = 0;
1219
1220         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
1221
1222         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
1223
1224         return(rc);
1225 }
1226
1227 /*
1228 ** translucent_db_config()
1229 **      pass config directives to captive backend;
1230 **      parse unrecognized directives ourselves;
1231 **
1232 */
1233
1234 static int translucent_db_config(
1235         BackendDB       *be,
1236         const char      *fname,
1237         int             lineno,
1238         int             argc,
1239         char            **argv
1240 )
1241 {
1242         slap_overinst *on = (slap_overinst *) be->bd_info;
1243         translucent_info *ov = on->on_bi.bi_private;
1244
1245         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
1246               argc ? argv[0] : "", 0, 0);
1247
1248         /* Something for the captive database? */
1249         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
1250                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
1251                         argc, argv );
1252         return SLAP_CONF_UNKNOWN;
1253 }
1254
1255 /*
1256 ** translucent_db_init()
1257 **      initialize the captive backend;
1258 **
1259 */
1260
1261 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
1262         slap_overinst *on = (slap_overinst *) be->bd_info;
1263         translucent_info *ov;
1264
1265         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
1266
1267         ov = ch_calloc(1, sizeof(translucent_info));
1268         on->on_bi.bi_private = ov;
1269         ov->db = *be;
1270         ov->db.be_private = NULL;
1271         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
1272         ov->defer_db_open = 1;
1273
1274         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
1275                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
1276                 return 1;
1277         }
1278         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
1279         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
1280
1281         return 0;
1282 }
1283
1284 /*
1285 ** translucent_db_open()
1286 **      if the captive backend has an open() method, call it;
1287 **
1288 */
1289
1290 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
1291         slap_overinst *on = (slap_overinst *) be->bd_info;
1292         translucent_info *ov = on->on_bi.bi_private;
1293         int rc;
1294
1295         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
1296
1297         /* need to inherit something from the original database... */
1298         ov->db.be_def_limit = be->be_def_limit;
1299         ov->db.be_limits = be->be_limits;
1300         ov->db.be_acl = be->be_acl;
1301         ov->db.be_dfltaccess = be->be_dfltaccess;
1302
1303         if ( ov->defer_db_open )
1304                 return 0;
1305
1306         rc = backend_startup_one( &ov->db, cr );
1307
1308         if(rc) Debug(LDAP_DEBUG_TRACE,
1309                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
1310
1311         return(rc);
1312 }
1313
1314 /*
1315 ** translucent_db_close()
1316 **      if the captive backend has a close() method, call it
1317 **
1318 */
1319
1320 static int
1321 translucent_db_close( BackendDB *be, ConfigReply *cr )
1322 {
1323         slap_overinst *on = (slap_overinst *) be->bd_info;
1324         translucent_info *ov = on->on_bi.bi_private;
1325         int rc = 0;
1326
1327         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
1328
1329         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
1330                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
1331         }
1332
1333         return(rc);
1334 }
1335
1336 /*
1337 ** translucent_db_destroy()
1338 **      if the captive backend has a db_destroy() method, call it;
1339 **      free any config data
1340 **
1341 */
1342
1343 static int
1344 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
1345 {
1346         slap_overinst *on = (slap_overinst *) be->bd_info;
1347         translucent_info *ov = on->on_bi.bi_private;
1348         int rc = 0;
1349
1350         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
1351
1352         if ( ov ) {
1353                 if ( ov->remote )
1354                         anlist_free( ov->remote, 1, NULL );
1355                 if ( ov->local )
1356                         anlist_free( ov->local, 1, NULL );
1357                 if ( ov->db.be_private != NULL ) {
1358                         backend_stopdown_one( &ov->db );
1359                 }
1360
1361                 ch_free(ov);
1362                 on->on_bi.bi_private = NULL;
1363         }
1364
1365         return(rc);
1366 }
1367
1368 /*
1369 ** translucent_initialize()
1370 **      initialize the slap_overinst with our entry points;
1371 **
1372 */
1373
1374 int translucent_initialize() {
1375
1376         int rc;
1377
1378         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
1379
1380         translucent.on_bi.bi_type       = "translucent";
1381         translucent.on_bi.bi_db_init    = translucent_db_init;
1382         translucent.on_bi.bi_db_config  = translucent_db_config;
1383         translucent.on_bi.bi_db_open    = translucent_db_open;
1384         translucent.on_bi.bi_db_close   = translucent_db_close;
1385         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
1386         translucent.on_bi.bi_op_bind    = translucent_bind;
1387         translucent.on_bi.bi_op_add     = translucent_add;
1388         translucent.on_bi.bi_op_modify  = translucent_modify;
1389         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
1390         translucent.on_bi.bi_op_delete  = translucent_delete;
1391         translucent.on_bi.bi_op_search  = translucent_search;
1392         translucent.on_bi.bi_op_compare = translucent_compare;
1393         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
1394         translucent.on_bi.bi_extended   = translucent_exop;
1395
1396         translucent.on_bi.bi_cf_ocs = translucentocs;
1397         rc = config_register_schema ( translucentcfg, translucentocs );
1398         if ( rc ) return rc;
1399
1400         return(overlay_register(&translucent));
1401 }
1402
1403 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
1404 int init_module(int argc, char *argv[]) {
1405         return translucent_initialize();
1406 }
1407 #endif
1408
1409 #endif /* SLAPD_OVER_TRANSLUCENT */