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 2004-2009 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 >= 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         ov->db.be_acl = op->o_bd->be_acl;
 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         ov->db.be_acl = op->o_bd->be_acl;
 634         rc = ov->db.bd_info->bi_op_compare(op, rs);
 635         op->o_bd = db;
 636
 637         return(rc);
 638 }
 639
 640 static int translucent_pwmod(Operation *op, SlapReply *rs) {
 641         SlapReply nrs = { REP_RESULT };
 642         Operation nop;
 643
 644         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 645         translucent_info *ov = on->on_bi.bi_private;
 646         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 647         Entry *e = NULL, *re = NULL;
 648         BackendDB *db;
 649         int rc = 0;
 650         slap_callback cb = { 0 };
 651
 652         if (!ov->pwmod_local) {
 653                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION,
 654                 rs->sr_text = "attempt to modify password in local database";
 655                 return rs->sr_err;
 656         }
 657
 658 /*
 659 ** fetch entry from the captive backend;
 660 ** if it did not exist, fail;
 661 ** release it, if captive backend supports this;
 662 **
 663 */
 664         db = op->o_bd;
 665         op->o_bd = &ov->db;
 666         ov->db.be_acl = op->o_bd->be_acl;
 667         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 668         if(rc != LDAP_SUCCESS || re == NULL ) {
 669                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 670                         "attempt to modify nonexistent local record");
 671                 return(rs->sr_err);
 672         }
 673         op->o_bd = db;
 674 /*
 675 ** fetch entry from local backend;
 676 ** if it exists:
 677 **      return CONTINUE;
 678 */
 679
 680         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 681         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 682         op->o_bd->bd_info = (BackendInfo *) on;
 683
 684         if(e && rc == LDAP_SUCCESS) {
 685                 if(re) {
 686                         if(ov->db.bd_info->bi_entry_release_rw) {
 687                                 op->o_bd = &ov->db;
 688                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 689                                 op->o_bd = db;
 690                         } else {
 691                                 entry_free(re);
 692                         }
 693                 }
 694                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 695                 be_entry_release_r(op, e);
 696                 op->o_bd->bd_info = (BackendInfo *) on;
 697                 return SLAP_CB_CONTINUE;
 698         }
 699
 700         /* don't leak remote entry copy */
 701         if(re) {
 702                 if(ov->db.bd_info->bi_entry_release_rw) {
 703                         op->o_bd = &ov->db;
 704                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 705                         op->o_bd = db;
 706                 } else {
 707                         entry_free(re);
 708                 }
 709         }
 710 /*
 711 ** glue_parent() for this Entry;
 712 ** call bi_op_add() in local backend;
 713 **
 714 */
 715         e = entry_alloc();
 716         ber_dupbv( &e->e_name, &op->o_req_dn );
 717         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 718         e->e_attrs = NULL;
 719
 720         nop = *op;
 721         nop.o_tag = LDAP_REQ_ADD;
 722         cb.sc_response = slap_null_cb;
 723         nop.oq_add.rs_e = e;
 724
 725         glue_parent(&nop);
 726
 727         nop.o_callback = &cb;
 728         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 729         if ( nop.ora_e == e ) {
 730                 entry_free( e );
 731         }
 732
 733         if ( rc == LDAP_SUCCESS ) {
 734                 return SLAP_CB_CONTINUE;
 735         }
 736
 737         return rc;
 738 }
 739
 740 static int translucent_exop(Operation *op, SlapReply *rs) {
 741         SlapReply nrs = { REP_RESULT };
 742
 743         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 744         translucent_info *ov = on->on_bi.bi_private;
 745         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 746
 747         Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n",
 748                 op->o_req_dn.bv_val, 0, 0);
 749
 750         if(ov->defer_db_open) {
 751                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 752                         "remote DB not available");
 753                 return(rs->sr_err);
 754         }
 755
 756         if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) {
 757                 return translucent_pwmod( op, rs );
 758         }
 759
 760         return SLAP_CB_CONTINUE;
 761 }
 762
 763 /*
 764 ** translucent_search_cb()
 765 **      merge local data with remote data
 766 **
 767 ** Four cases:
 768 ** 1: remote search, no local filter
 769 **      merge data and send immediately
 770 ** 2: remote search, with local filter
 771 **      merge data and save
 772 ** 3: local search, no remote filter
 773 **      merge data and send immediately
 774 ** 4: local search, with remote filter
 775 **      check list, merge, send, delete
 776 */
 777
 778 #define RMT_SIDE        0
 779 #define LCL_SIDE        1
 780 #define USE_LIST        2
 781
 782 typedef struct trans_ctx {
 783         BackendDB *db;
 784         slap_overinst *on;
 785         Filter *orig;
 786         Avlnode *list;
 787         int step;
 788 } trans_ctx;
 789
 790 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 791         trans_ctx *tc;
 792         BackendDB *db;
 793         slap_overinst *on;
 794         translucent_info *ov;
 795         Entry *le, *re;
 796         Attribute *a, *ax, *an, *as = NULL;
 797         int rc;
 798         int test_f = 0;
 799
 800         tc = op->o_callback->sc_private;
 801
 802         /* Don't let the op complete while we're gathering data */
 803         if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
 804                 return 0;
 805
 806         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 807                 return(SLAP_CB_CONTINUE);
 808
 809         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 810                 rs->sr_entry->e_name.bv_val, 0, 0);
 811
 812         on = tc->on;
 813         ov = on->on_bi.bi_private;
 814
 815         db = op->o_bd;
 816         re = NULL;
 817
 818         /* If we have local, get remote */
 819         if ( tc->step & LCL_SIDE ) {
 820                 le = rs->sr_entry;
 821                 /* If entry is already on list, use it */
 822                 if ( tc->step & USE_LIST ) {
 823                         re = tavl_delete( &tc->list, le, entry_dn_cmp );
 824                         if ( re ) {
 825                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 826                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 827                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 828                                 }
 829                                 if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 830                                         rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 831                                         entry_free( rs->sr_entry );
 832                                 }
 833                                 rc = test_filter( op, re, tc->orig );
 834                                 if ( rc == LDAP_COMPARE_TRUE ) {
 835                                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 836                                         rs->sr_entry = re;
 837                                         return SLAP_CB_CONTINUE;
 838                                 } else {
 839                                         entry_free( re );
 840                                         rs->sr_entry = NULL;
 841                                         return 0;
 842                                 }
 843                         }
 844                 }
 845                 op->o_bd = &ov->db;
 846                 rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
 847                 if ( rc == LDAP_SUCCESS && re ) {
 848                         Entry *tmp = entry_dup( re );
 849                         be_entry_release_r( op, re );
 850                         re = tmp;
 851                         test_f = 1;
 852                 }
 853         } else {
 854         /* Else we have remote, get local */
 855                 op->o_bd = tc->db;
 856                 rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
 857                 if ( rc == LDAP_SUCCESS && le ) {
 858                         re = entry_dup( rs->sr_entry );
 859                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 860                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 861                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 862                         }
 863                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 864                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 865                                 entry_free( rs->sr_entry );
 866                         }
 867                 } else {
 868                         le = NULL;
 869                 }
 870         }
 871
 872 /*
 873 ** if we got remote and local entry:
 874 **      foreach local attr:
 875 **              foreach remote attr:
 876 **                      if match, remote attr with local attr;
 877 **                      if new local, add to list;
 878 **      append new local attrs to remote;
 879 **
 880 */
 881
 882         if ( re && le ) {
 883                 for(ax = le->e_attrs; ax; ax = ax->a_next) {
 884                         for(a = re->e_attrs; a; a = a->a_next) {
 885                                 if(a->a_desc == ax->a_desc) {
 886                                         if(a->a_vals != a->a_nvals)
 887                                                 ber_bvarray_free(a->a_nvals);
 888                                         ber_bvarray_free(a->a_vals);
 889                                         a->a_vals = dup_bervarray(ax->a_vals);
 890                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 891                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 892                                         break;
 893                                 }
 894                         }
 895                         if(a) continue;
 896                         an = attr_dup(ax);
 897                         an->a_next = as;
 898                         as = an;
 899                 }
 900                 /* Dispose of local entry */
 901                 if ( tc->step & LCL_SIDE ) {
 902                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 903                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 904                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 905                         }
 906                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 907                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 908                                 entry_free( rs->sr_entry );
 909                         }
 910                 } else {
 911                         overlay_entry_release_ov(op, le, 0, on);
 912                 }
 913
 914                 /* literally append, so locals are always last */
 915                 if(as) {
 916                         if(re->e_attrs) {
 917                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 918                                 ax->a_next = as;
 919                         } else {
 920                                 re->e_attrs = as;
 921                         }
 922                 }
 923                 /* If both filters, save entry for later */
 924                 if ( tc->step == (USE_LIST|RMT_SIDE) ) {
 925                         tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error );
 926                         rs->sr_entry = NULL;
 927                         rc = 0;
 928                 } else {
 929                 /* send it now */
 930                         rs->sr_entry = re;
 931                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 932                         if ( test_f ) {
 933                                 rc = test_filter( op, rs->sr_entry, tc->orig );
 934                                 if ( rc == LDAP_COMPARE_TRUE ) {
 935                                         rc = SLAP_CB_CONTINUE;
 936                                 } else {
 937                                         rc = 0;
 938                                 }
 939                         } else {
 940                                 rc = SLAP_CB_CONTINUE;
 941                         }
 942                 }
 943         } else if ( le ) {
 944         /* Only a local entry: remote was deleted
 945          * Ought to delete the local too...
 946          */
 947                 rc = 0;
 948         } else if ( tc->step & USE_LIST ) {
 949         /* Only a remote entry, but both filters:
 950          * Test the complete filter
 951          */
 952                 rc = test_filter( op, rs->sr_entry, tc->orig );
 953                 if ( rc == LDAP_COMPARE_TRUE ) {
 954                         rc = SLAP_CB_CONTINUE;
 955                 } else {
 956                         rc = 0;
 957                 }
 958         } else {
 959         /* Only a remote entry, only remote filter:
 960          * just pass thru
 961          */
 962                 rc = SLAP_CB_CONTINUE;
 963         }
 964
 965         op->o_bd = db;
 966         return rc;
 967 }
 968
 969 /* Dup the filter, excluding invalid elements */
 970 static Filter *
 971 trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
 972 {
 973         Filter *n = NULL;
 974
 975         if ( !f )
 976                 return NULL;
 977
 978         switch( f->f_choice & SLAPD_FILTER_MASK ) {
 979         case SLAPD_FILTER_COMPUTED:
 980                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 981                 n->f_choice = f->f_choice;
 982                 n->f_result = f->f_result;
 983                 n->f_next = NULL;
 984                 break;
 985
 986         case LDAP_FILTER_PRESENT:
 987                 if ( ad_inlist( f->f_desc, an )) {
 988                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 989                         n->f_choice = f->f_choice;
 990                         n->f_desc = f->f_desc;
 991                         n->f_next = NULL;
 992                 }
 993                 break;
 994
 995         case LDAP_FILTER_EQUALITY:
 996         case LDAP_FILTER_GE:
 997         case LDAP_FILTER_LE:
 998         case LDAP_FILTER_APPROX:
 999         case LDAP_FILTER_SUBSTRINGS:
1000         case LDAP_FILTER_EXT:
1001                 if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
1002                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1003                         n->f_choice = f->f_choice;
1004                         n->f_ava = f->f_ava;
1005                         n->f_next = NULL;
1006                 }
1007                 break;
1008
1009         case LDAP_FILTER_AND:
1010         case LDAP_FILTER_OR:
1011         case LDAP_FILTER_NOT: {
1012                 Filter **p;
1013
1014                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1015                 n->f_choice = f->f_choice;
1016                 n->f_next = NULL;
1017
1018                 for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
1019                         *p = trans_filter_dup( op, f, an );
1020                         if ( !*p )
1021                                 continue;
1022                         p = &(*p)->f_next;
1023                 }
1024                 /* nothing valid in this list */
1025                 if ( !n->f_list ) {
1026                         op->o_tmpfree( n, op->o_tmpmemctx );
1027                         return NULL;
1028                 }
1029                 /* Only 1 element in this list */
1030                 if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
1031                         !n->f_list->f_next ) {
1032                         f = n->f_list;
1033                         *n = *f;
1034                         op->o_tmpfree( f, op->o_tmpmemctx );
1035                 }
1036                 break;
1037         }
1038         }
1039         return n;
1040 }
1041
1042 static void
1043 trans_filter_free( Operation *op, Filter *f )
1044 {
1045         Filter *n, *p, *next;
1046
1047         f->f_choice &= SLAPD_FILTER_MASK;
1048
1049         switch( f->f_choice ) {
1050         case LDAP_FILTER_AND:
1051         case LDAP_FILTER_OR:
1052         case LDAP_FILTER_NOT:
1053                 /* Free in reverse order */
1054                 n = NULL;
1055                 for ( p = f->f_list; p; p = next ) {
1056                         next = p->f_next;
1057                         p->f_next = n;
1058                         n = p;
1059                 }
1060                 for ( p = n; p; p = next ) {
1061                         next = p->f_next;
1062                         trans_filter_free( op, p );
1063                 }
1064                 break;
1065         default:
1066                 break;
1067         }
1068         op->o_tmpfree( f, op->o_tmpmemctx );
1069 }
1070
1071 /*
1072 ** translucent_search()
1073 **      search via captive backend;
1074 **      override results with any local data;
1075 **
1076 */
1077
1078 static int translucent_search(Operation *op, SlapReply *rs) {
1079         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1080         translucent_info *ov = on->on_bi.bi_private;
1081         slap_callback cb = { NULL, NULL, NULL, NULL };
1082         trans_ctx tc;
1083         Filter *fl, *fr;
1084         struct berval fbv;
1085         int rc = 0;
1086
1087         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
1088                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
1089
1090         if(ov->defer_db_open) {
1091                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1092                         "remote DB not available");
1093                 return(rs->sr_err);
1094         }
1095
1096         fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
1097         fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
1098         cb.sc_response = (slap_response *) translucent_search_cb;
1099         cb.sc_private = &tc;
1100         cb.sc_next = op->o_callback;
1101
1102         ov->db.be_acl = op->o_bd->be_acl;
1103         tc.db = op->o_bd;
1104         tc.on = on;
1105         tc.orig = op->ors_filter;
1106         tc.list = NULL;
1107         tc.step = 0;
1108         fbv = op->ors_filterstr;
1109
1110         op->o_callback = &cb;
1111
1112         if ( fr || !fl ) {
1113                 op->o_bd = &ov->db;
1114                 tc.step |= RMT_SIDE;
1115                 if ( fl ) {
1116                         tc.step |= USE_LIST;
1117                         op->ors_filter = fr;
1118                         filter2bv_x( op, fr, &op->ors_filterstr );
1119                 }
1120                 rc = ov->db.bd_info->bi_op_search(op, rs);
1121                 op->o_bd = tc.db;
1122                 if ( fl ) {
1123                         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1124                 }
1125         }
1126         if ( fl && !rc ) {
1127                 tc.step |= LCL_SIDE;
1128                 op->ors_filter = fl;
1129                 filter2bv_x( op, fl, &op->ors_filterstr );
1130                 rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
1131                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1132         }
1133         op->ors_filterstr = fbv;
1134         op->ors_filter = tc.orig;
1135         op->o_callback = cb.sc_next;
1136         /* Send out anything remaining on the list and finish */
1137         if ( tc.step & USE_LIST ) {
1138                 if ( tc.list ) {
1139                         Avlnode *av;
1140
1141                         av = tavl_end( tc.list, TAVL_DIR_LEFT );
1142                         while ( av ) {
1143                                 rs->sr_entry = av->avl_data;
1144                                 rc = test_filter( op, rs->sr_entry, op->ors_filter );
1145                                 if ( rc == LDAP_COMPARE_TRUE ) {
1146                                         rs->sr_flags = REP_ENTRY_MUSTBEFREED;
1147                                         rc = send_search_entry( op, rs );
1148                                         if ( rc ) break;
1149                                 } else {
1150                                         entry_free( rs->sr_entry );
1151                                 }
1152                                 av = tavl_next( av, TAVL_DIR_RIGHT );
1153                         }
1154                         tavl_free( tc.list, NULL );
1155                         rs->sr_entry = NULL;
1156                 }
1157                 send_ldap_result( op, rs );
1158         }
1159
1160         /* Free in reverse order */
1161         if ( fl )
1162                 trans_filter_free( op, fl );
1163         if ( fr )
1164                 trans_filter_free( op, fr );
1165
1166         return rc;
1167 }
1168
1169
1170 /*
1171 ** translucent_bind()
1172 **      pass bind request to captive backend;
1173 **
1174 */
1175
1176 static int translucent_bind(Operation *op, SlapReply *rs) {
1177         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1178         translucent_info *ov = on->on_bi.bi_private;
1179         BackendDB *db;
1180         slap_callback sc = { 0 }, *save_cb;
1181         int rc;
1182
1183         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
1184                 op->o_req_dn.bv_val, op->orb_method, 0);
1185
1186         if(ov->defer_db_open) {
1187                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1188                         "remote DB not available");
1189                 return(rs->sr_err);
1190         }
1191
1192         if (ov->bind_local) {
1193                 sc.sc_response = slap_null_cb;
1194                 save_cb = op->o_callback;
1195                 op->o_callback = &sc;
1196         }
1197
1198         db = op->o_bd;
1199         op->o_bd = &ov->db;
1200         ov->db.be_acl = op->o_bd->be_acl;
1201         rc = ov->db.bd_info->bi_op_bind(op, rs);
1202         op->o_bd = db;
1203
1204         if (ov->bind_local) {
1205                 op->o_callback = save_cb;
1206                 if (rc != LDAP_SUCCESS) {
1207                         rc = SLAP_CB_CONTINUE;
1208                 }
1209         }
1210
1211         return rc;
1212 }
1213
1214 /*
1215 ** translucent_connection_destroy()
1216 **      pass disconnect notification to captive backend;
1217 **
1218 */
1219
1220 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
1221         slap_overinst *on = (slap_overinst *) be->bd_info;
1222         translucent_info *ov = on->on_bi.bi_private;
1223         int rc = 0;
1224
1225         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
1226
1227         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
1228
1229         return(rc);
1230 }
1231
1232 /*
1233 ** translucent_db_config()
1234 **      pass config directives to captive backend;
1235 **      parse unrecognized directives ourselves;
1236 **
1237 */
1238
1239 static int translucent_db_config(
1240         BackendDB       *be,
1241         const char      *fname,
1242         int             lineno,
1243         int             argc,
1244         char            **argv
1245 )
1246 {
1247         slap_overinst *on = (slap_overinst *) be->bd_info;
1248         translucent_info *ov = on->on_bi.bi_private;
1249
1250         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
1251               argc ? argv[0] : "", 0, 0);
1252
1253         /* Something for the captive database? */
1254         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
1255                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
1256                         argc, argv );
1257         return SLAP_CONF_UNKNOWN;
1258 }
1259
1260 /*
1261 ** translucent_db_init()
1262 **      initialize the captive backend;
1263 **
1264 */
1265
1266 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
1267         slap_overinst *on = (slap_overinst *) be->bd_info;
1268         translucent_info *ov;
1269
1270         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
1271
1272         ov = ch_calloc(1, sizeof(translucent_info));
1273         on->on_bi.bi_private = ov;
1274         ov->db = *be;
1275         ov->db.be_private = NULL;
1276         ov->defer_db_open = 1;
1277
1278         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
1279                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
1280                 return 1;
1281         }
1282         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
1283         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
1284
1285         return 0;
1286 }
1287
1288 /*
1289 ** translucent_db_open()
1290 **      if the captive backend has an open() method, call it;
1291 **
1292 */
1293
1294 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
1295         slap_overinst *on = (slap_overinst *) be->bd_info;
1296         translucent_info *ov = on->on_bi.bi_private;
1297         int rc;
1298
1299         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
1300
1301         /* need to inherit something from the original database... */
1302         ov->db.be_def_limit = be->be_def_limit;
1303         ov->db.be_limits = be->be_limits;
1304         ov->db.be_acl = be->be_acl;
1305         ov->db.be_dfltaccess = be->be_dfltaccess;
1306
1307         if ( ov->defer_db_open )
1308                 return 0;
1309
1310         rc = backend_startup_one( &ov->db, cr );
1311
1312         if(rc) Debug(LDAP_DEBUG_TRACE,
1313                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
1314
1315         return(rc);
1316 }
1317
1318 /*
1319 ** translucent_db_close()
1320 **      if the captive backend has a close() method, call it
1321 **
1322 */
1323
1324 static int
1325 translucent_db_close( BackendDB *be, ConfigReply *cr )
1326 {
1327         slap_overinst *on = (slap_overinst *) be->bd_info;
1328         translucent_info *ov = on->on_bi.bi_private;
1329         int rc = 0;
1330
1331         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
1332
1333         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
1334                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
1335         }
1336
1337         return(rc);
1338 }
1339
1340 /*
1341 ** translucent_db_destroy()
1342 **      if the captive backend has a db_destroy() method, call it;
1343 **      free any config data
1344 **
1345 */
1346
1347 static int
1348 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
1349 {
1350         slap_overinst *on = (slap_overinst *) be->bd_info;
1351         translucent_info *ov = on->on_bi.bi_private;
1352         int rc = 0;
1353
1354         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
1355
1356         if ( ov ) {
1357                 if ( ov->remote )
1358                         anlist_free( ov->remote, 1, NULL );
1359                 if ( ov->local )
1360                         anlist_free( ov->local, 1, NULL );
1361                 if ( ov->db.be_private != NULL ) {
1362                         backend_stopdown_one( &ov->db );
1363                 }
1364
1365                 ch_free(ov);
1366                 on->on_bi.bi_private = NULL;
1367         }
1368
1369         return(rc);
1370 }
1371
1372 /*
1373 ** translucent_initialize()
1374 **      initialize the slap_overinst with our entry points;
1375 **
1376 */
1377
1378 int translucent_initialize() {
1379
1380         int rc;
1381
1382         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
1383
1384         translucent.on_bi.bi_type       = "translucent";
1385         translucent.on_bi.bi_db_init    = translucent_db_init;
1386         translucent.on_bi.bi_db_config  = translucent_db_config;
1387         translucent.on_bi.bi_db_open    = translucent_db_open;
1388         translucent.on_bi.bi_db_close   = translucent_db_close;
1389         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
1390         translucent.on_bi.bi_op_bind    = translucent_bind;
1391         translucent.on_bi.bi_op_add     = translucent_add;
1392         translucent.on_bi.bi_op_modify  = translucent_modify;
1393         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
1394         translucent.on_bi.bi_op_delete  = translucent_delete;
1395         translucent.on_bi.bi_op_search  = translucent_search;
1396         translucent.on_bi.bi_op_compare = translucent_compare;
1397         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
1398         translucent.on_bi.bi_extended   = translucent_exop;
1399
1400         translucent.on_bi.bi_cf_ocs = translucentocs;
1401         rc = config_register_schema ( translucentcfg, translucentocs );
1402         if ( rc ) return rc;
1403
1404         return(overlay_register(&translucent));
1405 }
1406
1407 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
1408 int init_module(int argc, char *argv[]) {
1409         return translucent_initialize();
1410 }
1411 #endif
1412
1413 #endif /* SLAPD_OVER_TRANSLUCENT */