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 ConfigTable transdummy[] = {
  99         { "", "", 0, 0, 0, ARG_IGNORED,
 100                 NULL, "( OLcfgGlAt:13 NAME 'olcDatabase' "
 101                         "DESC 'The backend type for a database instance' "
 102                         "SUP olcBackend SINGLE-VALUE X-ORDERED 'SIBLINGS' )", NULL, NULL },
 103         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 104 };
 105
 106 static ConfigOCs translucentocs[] = {
 107         { "( OLcfgOvOc:14.1 "
 108           "NAME 'olcTranslucentConfig' "
 109           "DESC 'Translucent configuration' "
 110           "SUP olcOverlayConfig "
 111           "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue $"
 112           " olcTranslucentLocal $ olcTranslucentRemote $"
 113           " olcTranslucentBindLocal $ olcTranslucentPwModLocal ) )",
 114           Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
 115         { "( OLcfgOvOc:14.2 "
 116           "NAME 'olcTranslucentDatabase' "
 117           "DESC 'Translucent target database configuration' "
 118           "AUXILIARY )", Cft_Misc, transdummy, translucent_ldadd },
 119         { NULL, 0, NULL }
 120 };
 121 /* for translucent_init() */
 122
 123 static int
 124 translucent_ldadd_cleanup( ConfigArgs *ca )
 125 {
 126         slap_overinst *on = ca->ca_private;
 127         translucent_info *ov = on->on_bi.bi_private;
 128
 129         ov->defer_db_open = 0;
 130         return backend_startup_one( ca->be, &ca->reply );
 131 }
 132
 133 static int
 134 translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
 135 {
 136         slap_overinst *on;
 137         translucent_info *ov;
 138
 139         Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
 140
 141         if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
 142              cei->ce_bi->bi_cf_ocs != translucentocs )
 143                 return LDAP_CONSTRAINT_VIOLATION;
 144
 145         on = (slap_overinst *)cei->ce_bi;
 146         ov = on->on_bi.bi_private;
 147         ca->be = &ov->db;
 148         ca->ca_private = on;
 149         if ( CONFIG_ONLINE_ADD( ca ))
 150                 ca->cleanup = translucent_ldadd_cleanup;
 151         else
 152                 ov->defer_db_open = 0;
 153
 154         return LDAP_SUCCESS;
 155 }
 156
 157 static int
 158 translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
 159 {
 160         CfEntryInfo *cei = e->e_private;
 161         slap_overinst *on = (slap_overinst *)cei->ce_bi;
 162         translucent_info *ov = on->on_bi.bi_private;
 163         struct berval bv;
 164
 165         Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
 166
 167         /* FIXME: should not hardcode "olcDatabase" here */
 168         bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
 169                 "olcDatabase=%s", ov->db.bd_info->bi_type );
 170         if ( bv.bv_len < 0 || bv.bv_len >= sizeof( ca->cr_msg ) ) {
 171                 return -1;
 172         }
 173         bv.bv_val = ca->cr_msg;
 174         ca->be = &ov->db;
 175         ov->defer_db_open = 0;
 176
 177         /* We can only create this entry if the database is table-driven
 178          */
 179         if ( ov->db.bd_info->bi_cf_ocs )
 180                 config_build_entry( op, rs, cei, ca, &bv,
 181                                     ov->db.bd_info->bi_cf_ocs,
 182                                     &translucentocs[1] );
 183
 184         return 0;
 185 }
 186
 187 static int
 188 translucent_cf_gen( ConfigArgs *c )
 189 {
 190         slap_overinst   *on = (slap_overinst *)c->bi;
 191         translucent_info *ov = on->on_bi.bi_private;
 192         AttributeName **an, *a2;
 193         int i;
 194
 195         if ( c->type == TRANS_LOCAL )
 196                 an = &ov->local;
 197         else
 198                 an = &ov->remote;
 199
 200         if ( c->op == SLAP_CONFIG_EMIT ) {
 201                 if ( !*an )
 202                         return 1;
 203                 for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) {
 204                         value_add_one( &c->rvalue_vals, &(*an)[i].an_name );
 205                 }
 206                 return ( i < 1 );
 207         } else if ( c->op == LDAP_MOD_DELETE ) {
 208                 if ( c->valx < 0 ) {
 209                         anlist_free( *an, 1, NULL );
 210                         *an = NULL;
 211                 } else {
 212                         i = c->valx;
 213                         ch_free( (*an)[i].an_name.bv_val );
 214                         do {
 215                                 (*an)[i] = (*an)[i+1];
 216                         } while ( !BER_BVISNULL( &(*an)[i].an_name ));
 217                 }
 218                 return 0;
 219         }
 220         a2 = str2anlist( *an, c->argv[1], "," );
 221         if ( !a2 ) {
 222                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s",
 223                         c->argv[0], c->argv[1] );
 224                 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 225                         "%s: %s\n", c->log, c->cr_msg, 0 );
 226                 return ARG_BAD_CONF;
 227         }
 228         *an = a2;
 229         return 0;
 230 }
 231
 232 static slap_overinst translucent;
 233
 234 /*
 235 ** glue_parent()
 236 **      call syncrepl_add_glue() with the parent suffix;
 237 **
 238 */
 239
 240 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 241
 242 void glue_parent(Operation *op) {
 243         Operation nop = *op;
 244         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 245         struct berval ndn = BER_BVNULL;
 246         Attribute *a;
 247         Entry *e;
 248         struct berval   pdn;
 249
 250         dnParent( &op->o_req_ndn, &pdn );
 251         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 252
 253         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 254
 255         e = entry_alloc();
 256         e->e_id = NOID;
 257         ber_dupbv(&e->e_name, &ndn);
 258         ber_dupbv(&e->e_nname, &ndn);
 259
 260         a = attr_alloc( slap_schema.si_ad_objectClass );
 261         a->a_numvals = 2;
 262         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 263         ber_dupbv(&a->a_vals[0], &glue[0]);
 264         ber_dupbv(&a->a_vals[1], &glue[1]);
 265         ber_dupbv(&a->a_vals[2], &glue[2]);
 266         a->a_nvals = a->a_vals;
 267         a->a_next = e->e_attrs;
 268         e->e_attrs = a;
 269
 270         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 271         a->a_numvals = 1;
 272         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 273         ber_dupbv(&a->a_vals[0], &glue[1]);
 274         ber_dupbv(&a->a_vals[1], &glue[2]);
 275         a->a_nvals = a->a_vals;
 276         a->a_next = e->e_attrs;
 277         e->e_attrs = a;
 278
 279         nop.o_req_dn = ndn;
 280         nop.o_req_ndn = ndn;
 281         nop.ora_e = e;
 282
 283         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 284         syncrepl_add_glue(&nop, e);
 285         nop.o_bd->bd_info = (BackendInfo *) on;
 286
 287         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 288
 289         return;
 290 }
 291
 292 /*
 293 ** dup_bervarray()
 294 **      copy a BerVarray;
 295 */
 296
 297 BerVarray dup_bervarray(BerVarray b) {
 298         int i, len;
 299         BerVarray nb;
 300         for(len = 0; b[len].bv_val; len++);
 301         nb = ch_malloc((len+1) * sizeof(BerValue));
 302         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 303         nb[len].bv_val = NULL;
 304         nb[len].bv_len = 0;
 305         return(nb);
 306 }
 307
 308 /*
 309 ** free_attr_chain()
 310 **      free only the Attribute*, not the contents;
 311 **
 312 */
 313 void free_attr_chain(Attribute *b) {
 314         Attribute *a;
 315         for(a=b; a; a=a->a_next) {
 316                 a->a_vals = NULL;
 317                 a->a_nvals = NULL;
 318         }
 319         attrs_free( b );
 320         return;
 321 }
 322
 323 /*
 324 ** translucent_add()
 325 **      if not bound as root, send ACCESS error;
 326 **      if glue, glue_parent();
 327 **      return CONTINUE;
 328 **
 329 */
 330
 331 static int translucent_add(Operation *op, SlapReply *rs) {
 332         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 333         translucent_info *ov = on->on_bi.bi_private;
 334         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 335                 op->o_req_dn.bv_val, 0, 0);
 336         if(!be_isroot(op)) {
 337                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 338                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 339                         "user modification of overlay database not permitted");
 340                 op->o_bd->bd_info = (BackendInfo *) on;
 341                 return(rs->sr_err);
 342         }
 343         if(!ov->no_glue) glue_parent(op);
 344         return(SLAP_CB_CONTINUE);
 345 }
 346
 347 /*
 348 ** translucent_modrdn()
 349 **      if not bound as root, send ACCESS error;
 350 **      if !glue, glue_parent();
 351 **      else return CONTINUE;
 352 **
 353 */
 354
 355 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 356         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 357         translucent_info *ov = on->on_bi.bi_private;
 358         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 359                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 360         if(!be_isroot(op)) {
 361                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 362                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 363                         "user modification of overlay database not permitted");
 364                 op->o_bd->bd_info = (BackendInfo *) on;
 365                 return(rs->sr_err);
 366         }
 367         if(!ov->no_glue) {
 368                 op->o_tag = LDAP_REQ_ADD;
 369                 glue_parent(op);
 370                 op->o_tag = LDAP_REQ_MODRDN;
 371         }
 372         return(SLAP_CB_CONTINUE);
 373 }
 374
 375 /*
 376 ** translucent_delete()
 377 **      if not bound as root, send ACCESS error;
 378 **      else return CONTINUE;
 379 **
 380 */
 381
 382 static int translucent_delete(Operation *op, SlapReply *rs) {
 383         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 384         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 385                 op->o_req_dn.bv_val, 0, 0);
 386         if(!be_isroot(op)) {
 387                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 388                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 389                         "user modification of overlay database not permitted");
 390                 op->o_bd->bd_info = (BackendInfo *) on;
 391                 return(rs->sr_err);
 392         }
 393         return(SLAP_CB_CONTINUE);
 394 }
 395
 396 static int
 397 translucent_tag_cb( Operation *op, SlapReply *rs )
 398 {
 399         op->o_tag = LDAP_REQ_MODIFY;
 400         op->orm_modlist = op->o_callback->sc_private;
 401         rs->sr_tag = slap_req2res( op->o_tag );
 402
 403         return SLAP_CB_CONTINUE;
 404 }
 405
 406 /*
 407 ** translucent_modify()
 408 **      modify in local backend if exists in both;
 409 **      otherwise, add to local backend;
 410 **      fail if not defined in captive backend;
 411 **
 412 */
 413
 414 static int translucent_modify(Operation *op, SlapReply *rs) {
 415         SlapReply nrs = { REP_RESULT };
 416
 417         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 418         translucent_info *ov = on->on_bi.bi_private;
 419         Entry *e = NULL, *re = NULL;
 420         Attribute *a, *ax;
 421         Modifications *m, **mm;
 422         BackendDB *db;
 423         int del, rc, erc = 0;
 424         slap_callback cb = { 0 };
 425
 426         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 427                 op->o_req_dn.bv_val, 0, 0);
 428
 429         if(ov->defer_db_open) {
 430                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 431                         "remote DB not available");
 432                 return(rs->sr_err);
 433         }
 434 /*
 435 ** fetch entry from the captive backend;
 436 ** if it did not exist, fail;
 437 ** release it, if captive backend supports this;
 438 **
 439 */
 440
 441         db = op->o_bd;
 442         op->o_bd = &ov->db;
 443         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 444         if(rc != LDAP_SUCCESS || re == NULL ) {
 445                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 446                         "attempt to modify nonexistent local record");
 447                 return(rs->sr_err);
 448         }
 449         op->o_bd = db;
 450 /*
 451 ** fetch entry from local backend;
 452 ** if it exists:
 453 **      foreach Modification:
 454 **          if attr not present in local:
 455 **              if Mod == LDAP_MOD_DELETE:
 456 **                  if remote attr not present, return NO_SUCH;
 457 **                  if remote attr present, drop this Mod;
 458 **              else force this Mod to LDAP_MOD_ADD;
 459 **      return CONTINUE;
 460 **
 461 */
 462
 463         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 464         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 465         op->o_bd->bd_info = (BackendInfo *) on;
 466
 467         if(e && rc == LDAP_SUCCESS) {
 468                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 469                 for(mm = &op->orm_modlist; *mm; ) {
 470                         m = *mm;
 471                         for(a = e->e_attrs; a; a = a->a_next)
 472                                 if(a->a_desc == m->sml_desc) break;
 473                         if(a) {
 474                                 mm = &m->sml_next;
 475                                 continue;               /* found local attr */
 476                         }
 477                         if(m->sml_op == LDAP_MOD_DELETE) {
 478                                 for(a = re->e_attrs; a; a = a->a_next)
 479                                         if(a->a_desc == m->sml_desc) break;
 480                                 /* not found remote attr */
 481                                 if(!a) {
 482                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 483                                         goto release;
 484                                 }
 485                                 if(ov->strict) {
 486                                         erc = LDAP_CONSTRAINT_VIOLATION;
 487                                         goto release;
 488                                 }
 489                                 Debug(LDAP_DEBUG_TRACE,
 490                                         "=> translucent_modify: silently dropping delete: %s\n",
 491                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 492                                 *mm = m->sml_next;
 493                                 m->sml_next = NULL;
 494                                 slap_mods_free(m, 1);
 495                                 continue;
 496                         }
 497                         m->sml_op = LDAP_MOD_ADD;
 498                         mm = &m->sml_next;
 499                 }
 500                 erc = SLAP_CB_CONTINUE;
 501 release:
 502                 if(re) {
 503                         if(ov->db.bd_info->bi_entry_release_rw) {
 504                                 op->o_bd = &ov->db;
 505                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 506                                 op->o_bd = db;
 507                         } else
 508                                 entry_free(re);
 509                 }
 510                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 511                 be_entry_release_r(op, e);
 512                 op->o_bd->bd_info = (BackendInfo *) on;
 513                 if(erc == SLAP_CB_CONTINUE) {
 514                         return(erc);
 515                 } else if(erc) {
 516                         send_ldap_error(op, rs, erc,
 517                                 "attempt to delete nonexistent attribute");
 518                         return(erc);
 519                 }
 520         }
 521
 522         /* don't leak remote entry copy */
 523         if(re) {
 524                 if(ov->db.bd_info->bi_entry_release_rw) {
 525                         op->o_bd = &ov->db;
 526                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 527                         op->o_bd = db;
 528                 } else
 529                         entry_free(re);
 530         }
 531 /*
 532 ** foreach Modification:
 533 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 534 ** if no Modifications were suitable:
 535 **      if strict, throw CONSTRAINT_VIOLATION;
 536 **      else, return early SUCCESS;
 537 ** fabricate Entry with new Attribute chain;
 538 ** glue_parent() for this Entry;
 539 ** call bi_op_add() in local backend;
 540 **
 541 */
 542
 543         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 544         a = NULL;
 545         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 546                 Attribute atmp;
 547                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 548                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 549                         Debug(LDAP_DEBUG_ANY,
 550                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 551                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 552                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 553                         continue;
 554                 }
 555                 atmp.a_desc = m->sml_desc;
 556                 atmp.a_vals = m->sml_values;
 557                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 558                 atmp.a_numvals = m->sml_numvals;
 559                 atmp.a_flags = 0;
 560                 a = attr_dup( &atmp );
 561                 a->a_next  = ax;
 562                 ax = a;
 563         }
 564
 565         if(del && ov->strict) {
 566                 attrs_free( a );
 567                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 568                         "attempt to delete attributes from local database");
 569                 return(rs->sr_err);
 570         }
 571
 572         if(!ax) {
 573                 if(ov->strict) {
 574                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 575                                 "modification contained other than ADD or REPLACE");
 576                         return(rs->sr_err);
 577                 }
 578                 /* rs->sr_text = "no valid modification found"; */
 579                 rs->sr_err = LDAP_SUCCESS;
 580                 send_ldap_result(op, rs);
 581                 return(rs->sr_err);
 582         }
 583
 584         e = entry_alloc();
 585         ber_dupbv( &e->e_name, &op->o_req_dn );
 586         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 587         e->e_attrs = a;
 588
 589         op->o_tag       = LDAP_REQ_ADD;
 590         cb.sc_response = translucent_tag_cb;
 591         cb.sc_private = op->orm_modlist;
 592         op->oq_add.rs_e = e;
 593
 594         glue_parent(op);
 595
 596         cb.sc_next = op->o_callback;
 597         op->o_callback = &cb;
 598         rc = on->on_info->oi_orig->bi_op_add(op, &nrs);
 599         if ( op->ora_e == e )
 600                 entry_free( e );
 601         op->o_callback = cb.sc_next;
 602
 603         return(rc);
 604 }
 605
 606 static int translucent_compare(Operation *op, SlapReply *rs) {
 607         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 608         translucent_info *ov = on->on_bi.bi_private;
 609         AttributeAssertion *ava = op->orc_ava;
 610         Entry *e;
 611         BackendDB *db;
 612         int rc;
 613
 614         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 615                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 616
 617 /*
 618 ** if the local backend has an entry for this attribute:
 619 **      CONTINUE and let it do the compare;
 620 **
 621 */
 622         rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on);
 623         if(rc == LDAP_SUCCESS && e) {
 624                 overlay_entry_release_ov(op, e, 0, on);
 625                 return(SLAP_CB_CONTINUE);
 626         }
 627
 628         if(ov->defer_db_open) {
 629                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 630                         "remote DB not available");
 631                 return(rs->sr_err);
 632         }
 633 /*
 634 ** call compare() in the captive backend;
 635 ** return the result;
 636 **
 637 */
 638         db = op->o_bd;
 639         op->o_bd = &ov->db;
 640         rc = ov->db.bd_info->bi_op_compare(op, rs);
 641         op->o_bd = db;
 642
 643         return(rc);
 644 }
 645
 646 static int translucent_pwmod(Operation *op, SlapReply *rs) {
 647         SlapReply nrs = { REP_RESULT };
 648         Operation nop;
 649
 650         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 651         translucent_info *ov = on->on_bi.bi_private;
 652         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 653         Entry *e = NULL, *re = NULL;
 654         BackendDB *db;
 655         int rc = 0;
 656         slap_callback cb = { 0 };
 657
 658         if (!ov->pwmod_local) {
 659                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION,
 660                 rs->sr_text = "attempt to modify password in local database";
 661                 return rs->sr_err;
 662         }
 663
 664 /*
 665 ** fetch entry from the captive backend;
 666 ** if it did not exist, fail;
 667 ** release it, if captive backend supports this;
 668 **
 669 */
 670         db = op->o_bd;
 671         op->o_bd = &ov->db;
 672         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 673         if(rc != LDAP_SUCCESS || re == NULL ) {
 674                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 675                         "attempt to modify nonexistent local record");
 676                 return(rs->sr_err);
 677         }
 678         op->o_bd = db;
 679 /*
 680 ** fetch entry from local backend;
 681 ** if it exists:
 682 **      return CONTINUE;
 683 */
 684
 685         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 686         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 687         op->o_bd->bd_info = (BackendInfo *) on;
 688
 689         if(e && rc == LDAP_SUCCESS) {
 690                 if(re) {
 691                         if(ov->db.bd_info->bi_entry_release_rw) {
 692                                 op->o_bd = &ov->db;
 693                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 694                                 op->o_bd = db;
 695                         } else {
 696                                 entry_free(re);
 697                         }
 698                 }
 699                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 700                 be_entry_release_r(op, e);
 701                 op->o_bd->bd_info = (BackendInfo *) on;
 702                 return SLAP_CB_CONTINUE;
 703         }
 704
 705         /* don't leak remote entry copy */
 706         if(re) {
 707                 if(ov->db.bd_info->bi_entry_release_rw) {
 708                         op->o_bd = &ov->db;
 709                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 710                         op->o_bd = db;
 711                 } else {
 712                         entry_free(re);
 713                 }
 714         }
 715 /*
 716 ** glue_parent() for this Entry;
 717 ** call bi_op_add() in local backend;
 718 **
 719 */
 720         e = entry_alloc();
 721         ber_dupbv( &e->e_name, &op->o_req_dn );
 722         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 723         e->e_attrs = NULL;
 724
 725         nop = *op;
 726         nop.o_tag = LDAP_REQ_ADD;
 727         cb.sc_response = slap_null_cb;
 728         nop.oq_add.rs_e = e;
 729
 730         glue_parent(&nop);
 731
 732         nop.o_callback = &cb;
 733         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 734         if ( nop.ora_e == e ) {
 735                 entry_free( e );
 736         }
 737
 738         if ( rc == LDAP_SUCCESS ) {
 739                 return SLAP_CB_CONTINUE;
 740         }
 741
 742         return rc;
 743 }
 744
 745 static int translucent_exop(Operation *op, SlapReply *rs) {
 746         SlapReply nrs = { REP_RESULT };
 747
 748         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 749         translucent_info *ov = on->on_bi.bi_private;
 750         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 751
 752         Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n",
 753                 op->o_req_dn.bv_val, 0, 0);
 754
 755         if(ov->defer_db_open) {
 756                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 757                         "remote DB not available");
 758                 return(rs->sr_err);
 759         }
 760
 761         if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) {
 762                 return translucent_pwmod( op, rs );
 763         }
 764
 765         return SLAP_CB_CONTINUE;
 766 }
 767
 768 /*
 769 ** translucent_search_cb()
 770 **      merge local data with remote data
 771 **
 772 ** Four cases:
 773 ** 1: remote search, no local filter
 774 **      merge data and send immediately
 775 ** 2: remote search, with local filter
 776 **      merge data and save
 777 ** 3: local search, no remote filter
 778 **      merge data and send immediately
 779 ** 4: local search, with remote filter
 780 **      check list, merge, send, delete
 781 */
 782
 783 #define RMT_SIDE        0
 784 #define LCL_SIDE        1
 785 #define USE_LIST        2
 786
 787 typedef struct trans_ctx {
 788         BackendDB *db;
 789         slap_overinst *on;
 790         Filter *orig;
 791         Avlnode *list;
 792         int step;
 793 } trans_ctx;
 794
 795 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 796         trans_ctx *tc;
 797         BackendDB *db;
 798         slap_overinst *on;
 799         translucent_info *ov;
 800         Entry *le, *re;
 801         Attribute *a, *ax, *an, *as = NULL;
 802         int rc;
 803         int test_f = 0;
 804
 805         tc = op->o_callback->sc_private;
 806
 807         /* Don't let the op complete while we're gathering data */
 808         if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
 809                 return 0;
 810
 811         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 812                 return(SLAP_CB_CONTINUE);
 813
 814         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 815                 rs->sr_entry->e_name.bv_val, 0, 0);
 816
 817         on = tc->on;
 818         ov = on->on_bi.bi_private;
 819
 820         db = op->o_bd;
 821         re = NULL;
 822
 823         /* If we have local, get remote */
 824         if ( tc->step & LCL_SIDE ) {
 825                 le = rs->sr_entry;
 826                 /* If entry is already on list, use it */
 827                 if ( tc->step & USE_LIST ) {
 828                         re = tavl_delete( &tc->list, le, entry_dn_cmp );
 829                         if ( re ) {
 830                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 831                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 832                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 833                                 }
 834                                 if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 835                                         rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 836                                         entry_free( rs->sr_entry );
 837                                 }
 838                                 rc = test_filter( op, re, tc->orig );
 839                                 if ( rc == LDAP_COMPARE_TRUE ) {
 840                                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 841                                         rs->sr_entry = re;
 842                                         return SLAP_CB_CONTINUE;
 843                                 } else {
 844                                         entry_free( re );
 845                                         rs->sr_entry = NULL;
 846                                         return 0;
 847                                 }
 848                         }
 849                 }
 850                 op->o_bd = &ov->db;
 851                 rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
 852                 if ( rc == LDAP_SUCCESS && re ) {
 853                         Entry *tmp = entry_dup( re );
 854                         be_entry_release_r( op, re );
 855                         re = tmp;
 856                         test_f = 1;
 857                 }
 858         } else {
 859         /* Else we have remote, get local */
 860                 op->o_bd = tc->db;
 861                 rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
 862                 if ( rc == LDAP_SUCCESS && le ) {
 863                         re = entry_dup( rs->sr_entry );
 864                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 865                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 866                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 867                         }
 868                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 869                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 870                                 entry_free( rs->sr_entry );
 871                         }
 872                 } else {
 873                         le = NULL;
 874                 }
 875         }
 876
 877 /*
 878 ** if we got remote and local entry:
 879 **      foreach local attr:
 880 **              foreach remote attr:
 881 **                      if match, remote attr with local attr;
 882 **                      if new local, add to list;
 883 **      append new local attrs to remote;
 884 **
 885 */
 886
 887         if ( re && le ) {
 888                 for(ax = le->e_attrs; ax; ax = ax->a_next) {
 889                         for(a = re->e_attrs; a; a = a->a_next) {
 890                                 if(a->a_desc == ax->a_desc) {
 891                                         if(a->a_vals != a->a_nvals)
 892                                                 ber_bvarray_free(a->a_nvals);
 893                                         ber_bvarray_free(a->a_vals);
 894                                         a->a_vals = dup_bervarray(ax->a_vals);
 895                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 896                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 897                                         break;
 898                                 }
 899                         }
 900                         if(a) continue;
 901                         an = attr_dup(ax);
 902                         an->a_next = as;
 903                         as = an;
 904                 }
 905                 /* Dispose of local entry */
 906                 if ( tc->step & LCL_SIDE ) {
 907                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 908                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 909                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 910                         }
 911                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 912                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 913                                 entry_free( rs->sr_entry );
 914                         }
 915                 } else {
 916                         overlay_entry_release_ov(op, le, 0, on);
 917                 }
 918
 919                 /* literally append, so locals are always last */
 920                 if(as) {
 921                         if(re->e_attrs) {
 922                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 923                                 ax->a_next = as;
 924                         } else {
 925                                 re->e_attrs = as;
 926                         }
 927                 }
 928                 /* If both filters, save entry for later */
 929                 if ( tc->step == (USE_LIST|RMT_SIDE) ) {
 930                         tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error );
 931                         rs->sr_entry = NULL;
 932                         rc = 0;
 933                 } else {
 934                 /* send it now */
 935                         rs->sr_entry = re;
 936                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 937                         if ( test_f ) {
 938                                 rc = test_filter( op, rs->sr_entry, tc->orig );
 939                                 if ( rc == LDAP_COMPARE_TRUE ) {
 940                                         rc = SLAP_CB_CONTINUE;
 941                                 } else {
 942                                         rc = 0;
 943                                 }
 944                         } else {
 945                                 rc = SLAP_CB_CONTINUE;
 946                         }
 947                 }
 948         } else if ( le ) {
 949         /* Only a local entry: remote was deleted
 950          * Ought to delete the local too...
 951          */
 952                 rc = 0;
 953         } else if ( tc->step & USE_LIST ) {
 954         /* Only a remote entry, but both filters:
 955          * Test the complete filter
 956          */
 957                 rc = test_filter( op, rs->sr_entry, tc->orig );
 958                 if ( rc == LDAP_COMPARE_TRUE ) {
 959                         rc = SLAP_CB_CONTINUE;
 960                 } else {
 961                         rc = 0;
 962                 }
 963         } else {
 964         /* Only a remote entry, only remote filter:
 965          * just pass thru
 966          */
 967                 rc = SLAP_CB_CONTINUE;
 968         }
 969
 970         op->o_bd = db;
 971         return rc;
 972 }
 973
 974 /* Dup the filter, excluding invalid elements */
 975 static Filter *
 976 trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
 977 {
 978         Filter *n = NULL;
 979
 980         if ( !f )
 981                 return NULL;
 982
 983         switch( f->f_choice & SLAPD_FILTER_MASK ) {
 984         case SLAPD_FILTER_COMPUTED:
 985                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 986                 n->f_choice = f->f_choice;
 987                 n->f_result = f->f_result;
 988                 n->f_next = NULL;
 989                 break;
 990
 991         case LDAP_FILTER_PRESENT:
 992                 if ( ad_inlist( f->f_desc, an )) {
 993                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 994                         n->f_choice = f->f_choice;
 995                         n->f_desc = f->f_desc;
 996                         n->f_next = NULL;
 997                 }
 998                 break;
 999
1000         case LDAP_FILTER_EQUALITY:
1001         case LDAP_FILTER_GE:
1002         case LDAP_FILTER_LE:
1003         case LDAP_FILTER_APPROX:
1004         case LDAP_FILTER_SUBSTRINGS:
1005         case LDAP_FILTER_EXT:
1006                 if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
1007                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1008                         n->f_choice = f->f_choice;
1009                         n->f_ava = f->f_ava;
1010                         n->f_next = NULL;
1011                 }
1012                 break;
1013
1014         case LDAP_FILTER_AND:
1015         case LDAP_FILTER_OR:
1016         case LDAP_FILTER_NOT: {
1017                 Filter **p;
1018
1019                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1020                 n->f_choice = f->f_choice;
1021                 n->f_next = NULL;
1022
1023                 for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
1024                         *p = trans_filter_dup( op, f, an );
1025                         if ( !*p )
1026                                 continue;
1027                         p = &(*p)->f_next;
1028                 }
1029                 /* nothing valid in this list */
1030                 if ( !n->f_list ) {
1031                         op->o_tmpfree( n, op->o_tmpmemctx );
1032                         return NULL;
1033                 }
1034                 /* Only 1 element in this list */
1035                 if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
1036                         !n->f_list->f_next ) {
1037                         f = n->f_list;
1038                         *n = *f;
1039                         op->o_tmpfree( f, op->o_tmpmemctx );
1040                 }
1041                 break;
1042         }
1043         }
1044         return n;
1045 }
1046
1047 static void
1048 trans_filter_free( Operation *op, Filter *f )
1049 {
1050         Filter *n, *p, *next;
1051
1052         f->f_choice &= SLAPD_FILTER_MASK;
1053
1054         switch( f->f_choice ) {
1055         case LDAP_FILTER_AND:
1056         case LDAP_FILTER_OR:
1057         case LDAP_FILTER_NOT:
1058                 /* Free in reverse order */
1059                 n = NULL;
1060                 for ( p = f->f_list; p; p = next ) {
1061                         next = p->f_next;
1062                         p->f_next = n;
1063                         n = p;
1064                 }
1065                 for ( p = n; p; p = next ) {
1066                         next = p->f_next;
1067                         trans_filter_free( op, p );
1068                 }
1069                 break;
1070         default:
1071                 break;
1072         }
1073         op->o_tmpfree( f, op->o_tmpmemctx );
1074 }
1075
1076 /*
1077 ** translucent_search()
1078 **      search via captive backend;
1079 **      override results with any local data;
1080 **
1081 */
1082
1083 static int translucent_search(Operation *op, SlapReply *rs) {
1084         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1085         translucent_info *ov = on->on_bi.bi_private;
1086         slap_callback cb = { NULL, NULL, NULL, NULL };
1087         trans_ctx tc;
1088         Filter *fl, *fr;
1089         struct berval fbv;
1090         int rc = 0;
1091
1092         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
1093                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
1094
1095         if(ov->defer_db_open) {
1096                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1097                         "remote DB not available");
1098                 return(rs->sr_err);
1099         }
1100
1101         fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
1102         fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
1103         cb.sc_response = (slap_response *) translucent_search_cb;
1104         cb.sc_private = &tc;
1105         cb.sc_next = op->o_callback;
1106
1107         tc.db = op->o_bd;
1108         tc.on = on;
1109         tc.orig = op->ors_filter;
1110         tc.list = NULL;
1111         tc.step = 0;
1112         fbv = op->ors_filterstr;
1113
1114         op->o_callback = &cb;
1115
1116         if ( fr || !fl ) {
1117                 op->o_bd = &ov->db;
1118                 tc.step |= RMT_SIDE;
1119                 if ( fl ) {
1120                         tc.step |= USE_LIST;
1121                         op->ors_filter = fr;
1122                         filter2bv_x( op, fr, &op->ors_filterstr );
1123                 }
1124                 rc = ov->db.bd_info->bi_op_search(op, rs);
1125                 op->o_bd = tc.db;
1126                 if ( fl ) {
1127                         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1128                 }
1129         }
1130         if ( fl && !rc ) {
1131                 tc.step |= LCL_SIDE;
1132                 op->ors_filter = fl;
1133                 filter2bv_x( op, fl, &op->ors_filterstr );
1134                 rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
1135                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1136         }
1137         op->ors_filterstr = fbv;
1138         op->ors_filter = tc.orig;
1139         op->o_callback = cb.sc_next;
1140         /* Send out anything remaining on the list and finish */
1141         if ( tc.step & USE_LIST ) {
1142                 if ( tc.list ) {
1143                         Avlnode *av;
1144
1145                         av = tavl_end( tc.list, TAVL_DIR_LEFT );
1146                         while ( av ) {
1147                                 rs->sr_entry = av->avl_data;
1148                                 rc = test_filter( op, rs->sr_entry, op->ors_filter );
1149                                 if ( rc == LDAP_COMPARE_TRUE ) {
1150                                         rs->sr_flags = REP_ENTRY_MUSTBEFREED;
1151                                         rc = send_search_entry( op, rs );
1152                                         if ( rc ) break;
1153                                 } else {
1154                                         entry_free( rs->sr_entry );
1155                                 }
1156                                 av = tavl_next( av, TAVL_DIR_RIGHT );
1157                         }
1158                         tavl_free( tc.list, NULL );
1159                         rs->sr_entry = NULL;
1160                 }
1161                 send_ldap_result( op, rs );
1162         }
1163
1164         /* Free in reverse order */
1165         if ( fl )
1166                 trans_filter_free( op, fl );
1167         if ( fr )
1168                 trans_filter_free( op, fr );
1169
1170         return rc;
1171 }
1172
1173
1174 /*
1175 ** translucent_bind()
1176 **      pass bind request to captive backend;
1177 **
1178 */
1179
1180 static int translucent_bind(Operation *op, SlapReply *rs) {
1181         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1182         translucent_info *ov = on->on_bi.bi_private;
1183         BackendDB *db;
1184         slap_callback sc = { 0 }, *save_cb;
1185         int rc;
1186
1187         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
1188                 op->o_req_dn.bv_val, op->orb_method, 0);
1189
1190         if(ov->defer_db_open) {
1191                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1192                         "remote DB not available");
1193                 return(rs->sr_err);
1194         }
1195
1196         if (ov->bind_local) {
1197                 sc.sc_response = slap_null_cb;
1198                 save_cb = op->o_callback;
1199                 op->o_callback = &sc;
1200         }
1201
1202         db = op->o_bd;
1203         op->o_bd = &ov->db;
1204         rc = ov->db.bd_info->bi_op_bind(op, rs);
1205         op->o_bd = db;
1206
1207         if (ov->bind_local) {
1208                 op->o_callback = save_cb;
1209                 if (rc != LDAP_SUCCESS) {
1210                         rc = SLAP_CB_CONTINUE;
1211                 }
1212         }
1213
1214         return rc;
1215 }
1216
1217 /*
1218 ** translucent_connection_destroy()
1219 **      pass disconnect notification to captive backend;
1220 **
1221 */
1222
1223 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
1224         slap_overinst *on = (slap_overinst *) be->bd_info;
1225         translucent_info *ov = on->on_bi.bi_private;
1226         int rc = 0;
1227
1228         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
1229
1230         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
1231
1232         return(rc);
1233 }
1234
1235 /*
1236 ** translucent_db_config()
1237 **      pass config directives to captive backend;
1238 **      parse unrecognized directives ourselves;
1239 **
1240 */
1241
1242 static int translucent_db_config(
1243         BackendDB       *be,
1244         const char      *fname,
1245         int             lineno,
1246         int             argc,
1247         char            **argv
1248 )
1249 {
1250         slap_overinst *on = (slap_overinst *) be->bd_info;
1251         translucent_info *ov = on->on_bi.bi_private;
1252
1253         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
1254               argc ? argv[0] : "", 0, 0);
1255
1256         /* Something for the captive database? */
1257         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
1258                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
1259                         argc, argv );
1260         return SLAP_CONF_UNKNOWN;
1261 }
1262
1263 /*
1264 ** translucent_db_init()
1265 **      initialize the captive backend;
1266 **
1267 */
1268
1269 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
1270         slap_overinst *on = (slap_overinst *) be->bd_info;
1271         translucent_info *ov;
1272
1273         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
1274
1275         ov = ch_calloc(1, sizeof(translucent_info));
1276         on->on_bi.bi_private = ov;
1277         ov->db = *be;
1278         ov->db.be_private = NULL;
1279         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
1280         ov->defer_db_open = 1;
1281
1282         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
1283                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
1284                 return 1;
1285         }
1286         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
1287         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
1288
1289         return 0;
1290 }
1291
1292 /*
1293 ** translucent_db_open()
1294 **      if the captive backend has an open() method, call it;
1295 **
1296 */
1297
1298 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
1299         slap_overinst *on = (slap_overinst *) be->bd_info;
1300         translucent_info *ov = on->on_bi.bi_private;
1301         int rc;
1302
1303         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
1304
1305         /* need to inherit something from the original database... */
1306         ov->db.be_def_limit = be->be_def_limit;
1307         ov->db.be_limits = be->be_limits;
1308         ov->db.be_acl = be->be_acl;
1309         ov->db.be_dfltaccess = be->be_dfltaccess;
1310
1311         if ( ov->defer_db_open )
1312                 return 0;
1313
1314         rc = backend_startup_one( &ov->db, cr );
1315
1316         if(rc) Debug(LDAP_DEBUG_TRACE,
1317                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
1318
1319         return(rc);
1320 }
1321
1322 /*
1323 ** translucent_db_close()
1324 **      if the captive backend has a close() method, call it
1325 **
1326 */
1327
1328 static int
1329 translucent_db_close( BackendDB *be, ConfigReply *cr )
1330 {
1331         slap_overinst *on = (slap_overinst *) be->bd_info;
1332         translucent_info *ov = on->on_bi.bi_private;
1333         int rc = 0;
1334
1335         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
1336
1337         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
1338                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
1339         }
1340
1341         return(rc);
1342 }
1343
1344 /*
1345 ** translucent_db_destroy()
1346 **      if the captive backend has a db_destroy() method, call it;
1347 **      free any config data
1348 **
1349 */
1350
1351 static int
1352 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
1353 {
1354         slap_overinst *on = (slap_overinst *) be->bd_info;
1355         translucent_info *ov = on->on_bi.bi_private;
1356         int rc = 0;
1357
1358         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
1359
1360         if ( ov ) {
1361                 if ( ov->remote )
1362                         anlist_free( ov->remote, 1, NULL );
1363                 if ( ov->local )
1364                         anlist_free( ov->local, 1, NULL );
1365                 if ( ov->db.be_private != NULL ) {
1366                         backend_stopdown_one( &ov->db );
1367                 }
1368
1369                 ch_free(ov);
1370                 on->on_bi.bi_private = NULL;
1371         }
1372
1373         return(rc);
1374 }
1375
1376 /*
1377 ** translucent_initialize()
1378 **      initialize the slap_overinst with our entry points;
1379 **
1380 */
1381
1382 int translucent_initialize() {
1383
1384         int rc;
1385
1386         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
1387
1388         translucent.on_bi.bi_type       = "translucent";
1389         translucent.on_bi.bi_db_init    = translucent_db_init;
1390         translucent.on_bi.bi_db_config  = translucent_db_config;
1391         translucent.on_bi.bi_db_open    = translucent_db_open;
1392         translucent.on_bi.bi_db_close   = translucent_db_close;
1393         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
1394         translucent.on_bi.bi_op_bind    = translucent_bind;
1395         translucent.on_bi.bi_op_add     = translucent_add;
1396         translucent.on_bi.bi_op_modify  = translucent_modify;
1397         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
1398         translucent.on_bi.bi_op_delete  = translucent_delete;
1399         translucent.on_bi.bi_op_search  = translucent_search;
1400         translucent.on_bi.bi_op_compare = translucent_compare;
1401         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
1402         translucent.on_bi.bi_extended   = translucent_exop;
1403
1404         translucent.on_bi.bi_cf_ocs = translucentocs;
1405         rc = config_register_schema ( translucentcfg, translucentocs );
1406         if ( rc ) return rc;
1407
1408         return(overlay_register(&translucent));
1409 }
1410
1411 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
1412 int init_module(int argc, char *argv[]) {
1413         return translucent_initialize();
1414 }
1415 #endif
1416
1417 #endif /* SLAPD_OVER_TRANSLUCENT */