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=" SLAP_X_ORDERED_FMT "%s",
 162                 0, ov->db.bd_info->bi_type );
 163         if ( bv.bv_len >= sizeof( ca->cr_msg ) ) {
 164                 return -1;
 165         }
 166         bv.bv_val = ca->cr_msg;
 167         ca->be = &ov->db;
 168         ov->defer_db_open = 0;
 169
 170         /* We can only create this entry if the database is table-driven
 171          */
 172         if ( ov->db.bd_info->bi_cf_ocs )
 173                 config_build_entry( op, rs, cei, ca, &bv,
 174                                     ov->db.bd_info->bi_cf_ocs,
 175                                     &translucentocs[1] );
 176
 177         return 0;
 178 }
 179
 180 static int
 181 translucent_cf_gen( ConfigArgs *c )
 182 {
 183         slap_overinst   *on = (slap_overinst *)c->bi;
 184         translucent_info *ov = on->on_bi.bi_private;
 185         AttributeName **an, *a2;
 186         int i;
 187
 188         if ( c->type == TRANS_LOCAL )
 189                 an = &ov->local;
 190         else
 191                 an = &ov->remote;
 192
 193         if ( c->op == SLAP_CONFIG_EMIT ) {
 194                 if ( !*an )
 195                         return 1;
 196                 for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) {
 197                         value_add_one( &c->rvalue_vals, &(*an)[i].an_name );
 198                 }
 199                 return ( i < 1 );
 200         } else if ( c->op == LDAP_MOD_DELETE ) {
 201                 if ( c->valx < 0 ) {
 202                         anlist_free( *an, 1, NULL );
 203                         *an = NULL;
 204                 } else {
 205                         i = c->valx;
 206                         ch_free( (*an)[i].an_name.bv_val );
 207                         do {
 208                                 (*an)[i] = (*an)[i+1];
 209                         } while ( !BER_BVISNULL( &(*an)[i].an_name ));
 210                 }
 211                 return 0;
 212         }
 213         a2 = str2anlist( *an, c->argv[1], "," );
 214         if ( !a2 ) {
 215                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s",
 216                         c->argv[0], c->argv[1] );
 217                 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 218                         "%s: %s\n", c->log, c->cr_msg, 0 );
 219                 return ARG_BAD_CONF;
 220         }
 221         *an = a2;
 222         return 0;
 223 }
 224
 225 static slap_overinst translucent;
 226
 227 /*
 228 ** glue_parent()
 229 **      call syncrepl_add_glue() with the parent suffix;
 230 **
 231 */
 232
 233 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 234
 235 void glue_parent(Operation *op) {
 236         Operation nop = *op;
 237         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 238         struct berval ndn = BER_BVNULL;
 239         Attribute *a;
 240         Entry *e;
 241         struct berval   pdn;
 242
 243         dnParent( &op->o_req_ndn, &pdn );
 244         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 245
 246         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 247
 248         e = entry_alloc();
 249         e->e_id = NOID;
 250         ber_dupbv(&e->e_name, &ndn);
 251         ber_dupbv(&e->e_nname, &ndn);
 252
 253         a = attr_alloc( slap_schema.si_ad_objectClass );
 254         a->a_numvals = 2;
 255         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 256         ber_dupbv(&a->a_vals[0], &glue[0]);
 257         ber_dupbv(&a->a_vals[1], &glue[1]);
 258         ber_dupbv(&a->a_vals[2], &glue[2]);
 259         a->a_nvals = a->a_vals;
 260         a->a_next = e->e_attrs;
 261         e->e_attrs = a;
 262
 263         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 264         a->a_numvals = 1;
 265         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 266         ber_dupbv(&a->a_vals[0], &glue[1]);
 267         ber_dupbv(&a->a_vals[1], &glue[2]);
 268         a->a_nvals = a->a_vals;
 269         a->a_next = e->e_attrs;
 270         e->e_attrs = a;
 271
 272         nop.o_req_dn = ndn;
 273         nop.o_req_ndn = ndn;
 274         nop.ora_e = e;
 275
 276         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 277         syncrepl_add_glue(&nop, e);
 278         nop.o_bd->bd_info = (BackendInfo *) on;
 279
 280         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 281
 282         return;
 283 }
 284
 285 /*
 286 ** free_attr_chain()
 287 **      free only the Attribute*, not the contents;
 288 **
 289 */
 290 void free_attr_chain(Attribute *b) {
 291         Attribute *a;
 292         for(a=b; a; a=a->a_next) {
 293                 a->a_vals = NULL;
 294                 a->a_nvals = NULL;
 295         }
 296         attrs_free( b );
 297         return;
 298 }
 299
 300 /*
 301 ** translucent_add()
 302 **      if not bound as root, send ACCESS error;
 303 **      if glue, glue_parent();
 304 **      return CONTINUE;
 305 **
 306 */
 307
 308 static int translucent_add(Operation *op, SlapReply *rs) {
 309         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 310         translucent_info *ov = on->on_bi.bi_private;
 311         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 312                 op->o_req_dn.bv_val, 0, 0);
 313         if(!be_isroot(op)) {
 314                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 315                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 316                         "user modification of overlay database not permitted");
 317                 op->o_bd->bd_info = (BackendInfo *) on;
 318                 return(rs->sr_err);
 319         }
 320         if(!ov->no_glue) glue_parent(op);
 321         return(SLAP_CB_CONTINUE);
 322 }
 323
 324 /*
 325 ** translucent_modrdn()
 326 **      if not bound as root, send ACCESS error;
 327 **      if !glue, glue_parent();
 328 **      else return CONTINUE;
 329 **
 330 */
 331
 332 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 333         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 334         translucent_info *ov = on->on_bi.bi_private;
 335         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 336                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 337         if(!be_isroot(op)) {
 338                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 339                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 340                         "user modification of overlay database not permitted");
 341                 op->o_bd->bd_info = (BackendInfo *) on;
 342                 return(rs->sr_err);
 343         }
 344         if(!ov->no_glue) {
 345                 op->o_tag = LDAP_REQ_ADD;
 346                 glue_parent(op);
 347                 op->o_tag = LDAP_REQ_MODRDN;
 348         }
 349         return(SLAP_CB_CONTINUE);
 350 }
 351
 352 /*
 353 ** translucent_delete()
 354 **      if not bound as root, send ACCESS error;
 355 **      else return CONTINUE;
 356 **
 357 */
 358
 359 static int translucent_delete(Operation *op, SlapReply *rs) {
 360         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 361         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 362                 op->o_req_dn.bv_val, 0, 0);
 363         if(!be_isroot(op)) {
 364                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 365                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 366                         "user modification of overlay database not permitted");
 367                 op->o_bd->bd_info = (BackendInfo *) on;
 368                 return(rs->sr_err);
 369         }
 370         return(SLAP_CB_CONTINUE);
 371 }
 372
 373 static int
 374 translucent_tag_cb( Operation *op, SlapReply *rs )
 375 {
 376         op->o_tag = LDAP_REQ_MODIFY;
 377         op->orm_modlist = op->o_callback->sc_private;
 378         rs->sr_tag = slap_req2res( op->o_tag );
 379
 380         return SLAP_CB_CONTINUE;
 381 }
 382
 383 /*
 384 ** translucent_modify()
 385 **      modify in local backend if exists in both;
 386 **      otherwise, add to local backend;
 387 **      fail if not defined in captive backend;
 388 **
 389 */
 390
 391 static int translucent_modify(Operation *op, SlapReply *rs) {
 392         SlapReply nrs = { REP_RESULT };
 393
 394         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 395         translucent_info *ov = on->on_bi.bi_private;
 396         Entry *e = NULL, *re = NULL;
 397         Attribute *a, *ax;
 398         Modifications *m, **mm;
 399         BackendDB *db;
 400         int del, rc, erc = 0;
 401         slap_callback cb = { 0 };
 402
 403         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 404                 op->o_req_dn.bv_val, 0, 0);
 405
 406         if(ov->defer_db_open) {
 407                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 408                         "remote DB not available");
 409                 return(rs->sr_err);
 410         }
 411 /*
 412 ** fetch entry from the captive backend;
 413 ** if it did not exist, fail;
 414 ** release it, if captive backend supports this;
 415 **
 416 */
 417
 418         db = op->o_bd;
 419         op->o_bd = &ov->db;
 420         ov->db.be_acl = op->o_bd->be_acl;
 421         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 422         if(rc != LDAP_SUCCESS || re == NULL ) {
 423                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 424                         "attempt to modify nonexistent local record");
 425                 return(rs->sr_err);
 426         }
 427         op->o_bd = db;
 428 /*
 429 ** fetch entry from local backend;
 430 ** if it exists:
 431 **      foreach Modification:
 432 **          if attr not present in local:
 433 **              if Mod == LDAP_MOD_DELETE:
 434 **                  if remote attr not present, return NO_SUCH;
 435 **                  if remote attr present, drop this Mod;
 436 **              else force this Mod to LDAP_MOD_ADD;
 437 **      return CONTINUE;
 438 **
 439 */
 440
 441         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 442         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 443         op->o_bd->bd_info = (BackendInfo *) on;
 444
 445         if(e && rc == LDAP_SUCCESS) {
 446                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 447                 for(mm = &op->orm_modlist; *mm; ) {
 448                         m = *mm;
 449                         for(a = e->e_attrs; a; a = a->a_next)
 450                                 if(a->a_desc == m->sml_desc) break;
 451                         if(a) {
 452                                 mm = &m->sml_next;
 453                                 continue;               /* found local attr */
 454                         }
 455                         if(m->sml_op == LDAP_MOD_DELETE) {
 456                                 for(a = re->e_attrs; a; a = a->a_next)
 457                                         if(a->a_desc == m->sml_desc) break;
 458                                 /* not found remote attr */
 459                                 if(!a) {
 460                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 461                                         goto release;
 462                                 }
 463                                 if(ov->strict) {
 464                                         erc = LDAP_CONSTRAINT_VIOLATION;
 465                                         goto release;
 466                                 }
 467                                 Debug(LDAP_DEBUG_TRACE,
 468                                         "=> translucent_modify: silently dropping delete: %s\n",
 469                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 470                                 *mm = m->sml_next;
 471                                 m->sml_next = NULL;
 472                                 slap_mods_free(m, 1);
 473                                 continue;
 474                         }
 475                         m->sml_op = LDAP_MOD_ADD;
 476                         mm = &m->sml_next;
 477                 }
 478                 erc = SLAP_CB_CONTINUE;
 479 release:
 480                 if(re) {
 481                         if(ov->db.bd_info->bi_entry_release_rw) {
 482                                 op->o_bd = &ov->db;
 483                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 484                                 op->o_bd = db;
 485                         } else
 486                                 entry_free(re);
 487                 }
 488                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 489                 be_entry_release_r(op, e);
 490                 op->o_bd->bd_info = (BackendInfo *) on;
 491                 if(erc == SLAP_CB_CONTINUE) {
 492                         return(erc);
 493                 } else if(erc) {
 494                         send_ldap_error(op, rs, erc,
 495                                 "attempt to delete nonexistent attribute");
 496                         return(erc);
 497                 }
 498         }
 499
 500         /* don't leak remote entry copy */
 501         if(re) {
 502                 if(ov->db.bd_info->bi_entry_release_rw) {
 503                         op->o_bd = &ov->db;
 504                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 505                         op->o_bd = db;
 506                 } else
 507                         entry_free(re);
 508         }
 509 /*
 510 ** foreach Modification:
 511 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 512 ** if no Modifications were suitable:
 513 **      if strict, throw CONSTRAINT_VIOLATION;
 514 **      else, return early SUCCESS;
 515 ** fabricate Entry with new Attribute chain;
 516 ** glue_parent() for this Entry;
 517 ** call bi_op_add() in local backend;
 518 **
 519 */
 520
 521         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 522         a = NULL;
 523         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 524                 Attribute atmp;
 525                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 526                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 527                         Debug(LDAP_DEBUG_ANY,
 528                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 529                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 530                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 531                         continue;
 532                 }
 533                 atmp.a_desc = m->sml_desc;
 534                 atmp.a_vals = m->sml_values;
 535                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 536                 atmp.a_numvals = m->sml_numvals;
 537                 atmp.a_flags = 0;
 538                 a = attr_dup( &atmp );
 539                 a->a_next  = ax;
 540                 ax = a;
 541         }
 542
 543         if(del && ov->strict) {
 544                 attrs_free( a );
 545                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 546                         "attempt to delete attributes from local database");
 547                 return(rs->sr_err);
 548         }
 549
 550         if(!ax) {
 551                 if(ov->strict) {
 552                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 553                                 "modification contained other than ADD or REPLACE");
 554                         return(rs->sr_err);
 555                 }
 556                 /* rs->sr_text = "no valid modification found"; */
 557                 rs->sr_err = LDAP_SUCCESS;
 558                 send_ldap_result(op, rs);
 559                 return(rs->sr_err);
 560         }
 561
 562         e = entry_alloc();
 563         ber_dupbv( &e->e_name, &op->o_req_dn );
 564         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 565         e->e_attrs = a;
 566
 567         op->o_tag       = LDAP_REQ_ADD;
 568         cb.sc_response = translucent_tag_cb;
 569         cb.sc_private = op->orm_modlist;
 570         op->oq_add.rs_e = e;
 571
 572         glue_parent(op);
 573
 574         cb.sc_next = op->o_callback;
 575         op->o_callback = &cb;
 576         rc = on->on_info->oi_orig->bi_op_add(op, &nrs);
 577         if ( op->ora_e == e )
 578                 entry_free( e );
 579         op->o_callback = cb.sc_next;
 580
 581         return(rc);
 582 }
 583
 584 static int translucent_compare(Operation *op, SlapReply *rs) {
 585         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 586         translucent_info *ov = on->on_bi.bi_private;
 587         AttributeAssertion *ava = op->orc_ava;
 588         Entry *e;
 589         BackendDB *db;
 590         int rc;
 591
 592         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 593                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 594
 595 /*
 596 ** if the local backend has an entry for this attribute:
 597 **      CONTINUE and let it do the compare;
 598 **
 599 */
 600         rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on);
 601         if(rc == LDAP_SUCCESS && e) {
 602                 overlay_entry_release_ov(op, e, 0, on);
 603                 return(SLAP_CB_CONTINUE);
 604         }
 605
 606         if(ov->defer_db_open) {
 607                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 608                         "remote DB not available");
 609                 return(rs->sr_err);
 610         }
 611 /*
 612 ** call compare() in the captive backend;
 613 ** return the result;
 614 **
 615 */
 616         db = op->o_bd;
 617         op->o_bd = &ov->db;
 618         ov->db.be_acl = op->o_bd->be_acl;
 619         rc = ov->db.bd_info->bi_op_compare(op, rs);
 620         op->o_bd = db;
 621
 622         return(rc);
 623 }
 624
 625 static int translucent_pwmod(Operation *op, SlapReply *rs) {
 626         SlapReply nrs = { REP_RESULT };
 627         Operation nop;
 628
 629         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 630         translucent_info *ov = on->on_bi.bi_private;
 631         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 632         Entry *e = NULL, *re = NULL;
 633         BackendDB *db;
 634         int rc = 0;
 635         slap_callback cb = { 0 };
 636
 637         if (!ov->pwmod_local) {
 638                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION,
 639                 rs->sr_text = "attempt to modify password in local database";
 640                 return rs->sr_err;
 641         }
 642
 643 /*
 644 ** fetch entry from the captive backend;
 645 ** if it did not exist, fail;
 646 ** release it, if captive backend supports this;
 647 **
 648 */
 649         db = op->o_bd;
 650         op->o_bd = &ov->db;
 651         ov->db.be_acl = op->o_bd->be_acl;
 652         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 653         if(rc != LDAP_SUCCESS || re == NULL ) {
 654                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 655                         "attempt to modify nonexistent local record");
 656                 return(rs->sr_err);
 657         }
 658         op->o_bd = db;
 659 /*
 660 ** fetch entry from local backend;
 661 ** if it exists:
 662 **      return CONTINUE;
 663 */
 664
 665         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 666         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 667         op->o_bd->bd_info = (BackendInfo *) on;
 668
 669         if(e && rc == LDAP_SUCCESS) {
 670                 if(re) {
 671                         if(ov->db.bd_info->bi_entry_release_rw) {
 672                                 op->o_bd = &ov->db;
 673                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 674                                 op->o_bd = db;
 675                         } else {
 676                                 entry_free(re);
 677                         }
 678                 }
 679                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 680                 be_entry_release_r(op, e);
 681                 op->o_bd->bd_info = (BackendInfo *) on;
 682                 return SLAP_CB_CONTINUE;
 683         }
 684
 685         /* don't leak remote entry copy */
 686         if(re) {
 687                 if(ov->db.bd_info->bi_entry_release_rw) {
 688                         op->o_bd = &ov->db;
 689                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 690                         op->o_bd = db;
 691                 } else {
 692                         entry_free(re);
 693                 }
 694         }
 695 /*
 696 ** glue_parent() for this Entry;
 697 ** call bi_op_add() in local backend;
 698 **
 699 */
 700         e = entry_alloc();
 701         ber_dupbv( &e->e_name, &op->o_req_dn );
 702         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 703         e->e_attrs = NULL;
 704
 705         nop = *op;
 706         nop.o_tag = LDAP_REQ_ADD;
 707         cb.sc_response = slap_null_cb;
 708         nop.oq_add.rs_e = e;
 709
 710         glue_parent(&nop);
 711
 712         nop.o_callback = &cb;
 713         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 714         if ( nop.ora_e == e ) {
 715                 entry_free( e );
 716         }
 717
 718         if ( rc == LDAP_SUCCESS ) {
 719                 return SLAP_CB_CONTINUE;
 720         }
 721
 722         return rc;
 723 }
 724
 725 static int translucent_exop(Operation *op, SlapReply *rs) {
 726         SlapReply nrs = { REP_RESULT };
 727
 728         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 729         translucent_info *ov = on->on_bi.bi_private;
 730         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 731
 732         Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n",
 733                 op->o_req_dn.bv_val, 0, 0);
 734
 735         if(ov->defer_db_open) {
 736                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 737                         "remote DB not available");
 738                 return(rs->sr_err);
 739         }
 740
 741         if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) {
 742                 return translucent_pwmod( op, rs );
 743         }
 744
 745         return SLAP_CB_CONTINUE;
 746 }
 747
 748 /*
 749 ** translucent_search_cb()
 750 **      merge local data with remote data
 751 **
 752 ** Four cases:
 753 ** 1: remote search, no local filter
 754 **      merge data and send immediately
 755 ** 2: remote search, with local filter
 756 **      merge data and save
 757 ** 3: local search, no remote filter
 758 **      merge data and send immediately
 759 ** 4: local search, with remote filter
 760 **      check list, merge, send, delete
 761 */
 762
 763 #define RMT_SIDE        0
 764 #define LCL_SIDE        1
 765 #define USE_LIST        2
 766
 767 typedef struct trans_ctx {
 768         BackendDB *db;
 769         slap_overinst *on;
 770         Filter *orig;
 771         Avlnode *list;
 772         int step;
 773         int slimit;
 774         AttributeName *attrs;
 775 } trans_ctx;
 776
 777 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 778         trans_ctx *tc;
 779         BackendDB *db;
 780         slap_overinst *on;
 781         translucent_info *ov;
 782         Entry *le, *re;
 783         Attribute *a, *ax, *an, *as = NULL;
 784         int rc;
 785         int test_f = 0;
 786
 787         tc = op->o_callback->sc_private;
 788
 789         /* Don't let the op complete while we're gathering data */
 790         if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
 791                 return 0;
 792
 793         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 794                 return(SLAP_CB_CONTINUE);
 795
 796         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 797                 rs->sr_entry->e_name.bv_val, 0, 0);
 798
 799         op->ors_slimit = tc->slimit + ( tc->slimit > 0 ? 1 : 0 );
 800         if ( op->ors_attrs == slap_anlist_all_attributes ) {
 801                 op->ors_attrs = tc->attrs;
 802                 rs->sr_attrs = tc->attrs;
 803                 rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
 804         }
 805
 806         on = tc->on;
 807         ov = on->on_bi.bi_private;
 808
 809         db = op->o_bd;
 810         re = NULL;
 811
 812         /* If we have local, get remote */
 813         if ( tc->step & LCL_SIDE ) {
 814                 le = rs->sr_entry;
 815                 /* If entry is already on list, use it */
 816                 if ( tc->step & USE_LIST ) {
 817                         re = tavl_delete( &tc->list, le, entry_dn_cmp );
 818                         if ( re ) {
 819                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 820                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 821                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 822                                 }
 823                                 if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 824                                         rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 825                                         entry_free( rs->sr_entry );
 826                                 }
 827                                 rc = test_filter( op, re, tc->orig );
 828                                 if ( rc == LDAP_COMPARE_TRUE ) {
 829                                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 830                                         rs->sr_entry = re;
 831
 832                                         if ( tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
 833                                                 return LDAP_SIZELIMIT_EXCEEDED;
 834                                         }
 835
 836                                         return SLAP_CB_CONTINUE;
 837                                 } else {
 838                                         entry_free( re );
 839                                         rs->sr_entry = NULL;
 840                                         return 0;
 841                                 }
 842                         }
 843                 }
 844                 op->o_bd = &ov->db;
 845                 rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
 846                 if ( rc == LDAP_SUCCESS && re ) {
 847                         Entry *tmp = entry_dup( re );
 848                         be_entry_release_r( op, re );
 849                         re = tmp;
 850                         test_f = 1;
 851                 }
 852         } else {
 853         /* Else we have remote, get local */
 854                 op->o_bd = tc->db;
 855                 rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
 856                 if ( rc == LDAP_SUCCESS && le ) {
 857                         re = entry_dup( rs->sr_entry );
 858                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 859                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 860                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 861                         }
 862                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 863                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 864                                 entry_free( rs->sr_entry );
 865                         }
 866                 } else {
 867                         le = NULL;
 868                 }
 869         }
 870
 871 /*
 872 ** if we got remote and local entry:
 873 **      foreach local attr:
 874 **              foreach remote attr:
 875 **                      if match, remote attr with local attr;
 876 **                      if new local, add to list;
 877 **      append new local attrs to remote;
 878 **
 879 */
 880
 881         if ( re && le ) {
 882                 for(ax = le->e_attrs; ax; ax = ax->a_next) {
 883                         for(a = re->e_attrs; a; a = a->a_next) {
 884                                 if(a->a_desc == ax->a_desc) {
 885                                         test_f = 1;
 886                                         if(a->a_vals != a->a_nvals)
 887                                                 ber_bvarray_free(a->a_nvals);
 888                                         ber_bvarray_free(a->a_vals);
 889                                         ber_bvarray_dup_x( &a->a_vals, ax->a_vals, NULL );
 890                                         if ( ax->a_vals == ax->a_nvals ) {
 891                                                 a->a_nvals = a->a_vals;
 892                                         } else {
 893                                                 ber_bvarray_dup_x( &a->a_nvals, ax->a_nvals, NULL );
 894                                         }
 895                                         break;
 896                                 }
 897                         }
 898                         if(a) continue;
 899                         an = attr_dup(ax);
 900                         an->a_next = as;
 901                         as = an;
 902                 }
 903                 /* Dispose of local entry */
 904                 if ( tc->step & LCL_SIDE ) {
 905                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 906                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 907                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 908                         }
 909                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 910                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 911                                 entry_free( rs->sr_entry );
 912                         }
 913                 } else {
 914                         overlay_entry_release_ov(op, le, 0, on);
 915                 }
 916
 917                 /* literally append, so locals are always last */
 918                 if(as) {
 919                         if(re->e_attrs) {
 920                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 921                                 ax->a_next = as;
 922                         } else {
 923                                 re->e_attrs = as;
 924                         }
 925                 }
 926                 /* If both filters, save entry for later */
 927                 if ( tc->step == (USE_LIST|RMT_SIDE) ) {
 928                         tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error );
 929                         rs->sr_entry = NULL;
 930                         rc = 0;
 931                 } else {
 932                 /* send it now */
 933                         rs->sr_entry = re;
 934                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 935                         if ( test_f ) {
 936                                 rc = test_filter( op, rs->sr_entry, tc->orig );
 937                                 if ( rc == LDAP_COMPARE_TRUE ) {
 938                                         rc = SLAP_CB_CONTINUE;
 939                                 } else {
 940                                         rc = 0;
 941                                 }
 942                         } else {
 943                                 rc = SLAP_CB_CONTINUE;
 944                         }
 945                 }
 946         } else if ( le ) {
 947         /* Only a local entry: remote was deleted
 948          * Ought to delete the local too...
 949          */
 950                 rc = 0;
 951         } else if ( tc->step & USE_LIST ) {
 952         /* Only a remote entry, but both filters:
 953          * Test the complete filter
 954          */
 955                 rc = test_filter( op, rs->sr_entry, tc->orig );
 956                 if ( rc == LDAP_COMPARE_TRUE ) {
 957                         rc = SLAP_CB_CONTINUE;
 958                 } else {
 959                         rc = 0;
 960                 }
 961         } else {
 962         /* Only a remote entry, only remote filter:
 963          * just pass thru
 964          */
 965                 rc = SLAP_CB_CONTINUE;
 966         }
 967
 968         op->o_bd = db;
 969
 970         if ( rc == SLAP_CB_CONTINUE && tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
 971                 return LDAP_SIZELIMIT_EXCEEDED;
 972         }
 973
 974         return rc;
 975 }
 976
 977 /* Dup the filter, excluding invalid elements */
 978 static Filter *
 979 trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
 980 {
 981         Filter *n = NULL;
 982
 983         if ( !f )
 984                 return NULL;
 985
 986         switch( f->f_choice & SLAPD_FILTER_MASK ) {
 987         case SLAPD_FILTER_COMPUTED:
 988                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 989                 n->f_choice = f->f_choice;
 990                 n->f_result = f->f_result;
 991                 n->f_next = NULL;
 992                 break;
 993
 994         case LDAP_FILTER_PRESENT:
 995                 if ( ad_inlist( f->f_desc, an )) {
 996                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 997                         n->f_choice = f->f_choice;
 998                         n->f_desc = f->f_desc;
 999                         n->f_next = NULL;
1000                 }
1001                 break;
1002
1003         case LDAP_FILTER_EQUALITY:
1004         case LDAP_FILTER_GE:
1005         case LDAP_FILTER_LE:
1006         case LDAP_FILTER_APPROX:
1007         case LDAP_FILTER_SUBSTRINGS:
1008         case LDAP_FILTER_EXT:
1009                 if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
1010                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1011                         n->f_choice = f->f_choice;
1012                         n->f_ava = f->f_ava;
1013                         n->f_next = NULL;
1014                 }
1015                 break;
1016
1017         case LDAP_FILTER_AND:
1018         case LDAP_FILTER_OR:
1019         case LDAP_FILTER_NOT: {
1020                 Filter **p;
1021
1022                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1023                 n->f_choice = f->f_choice;
1024                 n->f_next = NULL;
1025
1026                 for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
1027                         *p = trans_filter_dup( op, f, an );
1028                         if ( !*p )
1029                                 continue;
1030                         p = &(*p)->f_next;
1031                 }
1032                 /* nothing valid in this list */
1033                 if ( !n->f_list ) {
1034                         op->o_tmpfree( n, op->o_tmpmemctx );
1035                         return NULL;
1036                 }
1037                 /* Only 1 element in this list */
1038                 if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
1039                         !n->f_list->f_next ) {
1040                         f = n->f_list;
1041                         *n = *f;
1042                         op->o_tmpfree( f, op->o_tmpmemctx );
1043                 }
1044                 break;
1045         }
1046         }
1047         return n;
1048 }
1049
1050 static void
1051 trans_filter_free( Operation *op, Filter *f )
1052 {
1053         Filter *n, *p, *next;
1054
1055         f->f_choice &= SLAPD_FILTER_MASK;
1056
1057         switch( f->f_choice ) {
1058         case LDAP_FILTER_AND:
1059         case LDAP_FILTER_OR:
1060         case LDAP_FILTER_NOT:
1061                 /* Free in reverse order */
1062                 n = NULL;
1063                 for ( p = f->f_list; p; p = next ) {
1064                         next = p->f_next;
1065                         p->f_next = n;
1066                         n = p;
1067                 }
1068                 for ( p = n; p; p = next ) {
1069                         next = p->f_next;
1070                         trans_filter_free( op, p );
1071                 }
1072                 break;
1073         default:
1074                 break;
1075         }
1076         op->o_tmpfree( f, op->o_tmpmemctx );
1077 }
1078
1079 /*
1080 ** translucent_search()
1081 **      search via captive backend;
1082 **      override results with any local data;
1083 **
1084 */
1085
1086 static int translucent_search(Operation *op, SlapReply *rs) {
1087         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1088         translucent_info *ov = on->on_bi.bi_private;
1089         slap_callback cb = { NULL, NULL, NULL, NULL };
1090         trans_ctx tc;
1091         Filter *fl, *fr;
1092         struct berval fbv;
1093         int rc = 0;
1094
1095         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
1096                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
1097
1098         if(ov->defer_db_open) {
1099                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1100                         "remote DB not available");
1101                 return(rs->sr_err);
1102         }
1103
1104         fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
1105         fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
1106         cb.sc_response = (slap_response *) translucent_search_cb;
1107         cb.sc_private = &tc;
1108         cb.sc_next = op->o_callback;
1109
1110         ov->db.be_acl = op->o_bd->be_acl;
1111         tc.db = op->o_bd;
1112         tc.on = on;
1113         tc.orig = op->ors_filter;
1114         tc.list = NULL;
1115         tc.step = 0;
1116         tc.slimit = op->ors_slimit;
1117         tc.attrs = NULL;
1118         fbv = op->ors_filterstr;
1119
1120         op->o_callback = &cb;
1121
1122         if ( fr || !fl ) {
1123                 tc.attrs = op->ors_attrs;
1124                 op->ors_slimit = SLAP_NO_LIMIT;
1125                 op->ors_attrs = slap_anlist_all_attributes;
1126                 op->o_bd = &ov->db;
1127                 tc.step |= RMT_SIDE;
1128                 if ( fl ) {
1129                         tc.step |= USE_LIST;
1130                         op->ors_filter = fr;
1131                         filter2bv_x( op, fr, &op->ors_filterstr );
1132                 }
1133                 rc = ov->db.bd_info->bi_op_search(op, rs);
1134                 op->ors_attrs = tc.attrs;
1135                 op->o_bd = tc.db;
1136                 if ( fl ) {
1137                         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1138                 }
1139         }
1140         if ( fl && !rc ) {
1141                 tc.step |= LCL_SIDE;
1142                 op->ors_filter = fl;
1143                 filter2bv_x( op, fl, &op->ors_filterstr );
1144                 rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
1145                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1146         }
1147         op->ors_filterstr = fbv;
1148         op->ors_filter = tc.orig;
1149         op->o_callback = cb.sc_next;
1150         rs->sr_attrs = op->ors_attrs;
1151         rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
1152
1153         /* Send out anything remaining on the list and finish */
1154         if ( tc.step & USE_LIST ) {
1155                 if ( tc.list ) {
1156                         Avlnode *av;
1157
1158                         av = tavl_end( tc.list, TAVL_DIR_LEFT );
1159                         while ( av ) {
1160                                 rs->sr_entry = av->avl_data;
1161                                 rc = test_filter( op, rs->sr_entry, op->ors_filter );
1162                                 if ( rc == LDAP_COMPARE_TRUE ) {
1163                                         rs->sr_flags = REP_ENTRY_MUSTBEFREED;
1164                                         rc = send_search_entry( op, rs );
1165                                         if ( rc ) break;
1166                                 } else {
1167                                         entry_free( rs->sr_entry );
1168                                 }
1169                                 av = tavl_next( av, TAVL_DIR_RIGHT );
1170                         }
1171                         tavl_free( tc.list, NULL );
1172                         rs->sr_entry = NULL;
1173                 }
1174                 send_ldap_result( op, rs );
1175         }
1176
1177         op->ors_slimit = tc.slimit;
1178
1179         /* Free in reverse order */
1180         if ( fl )
1181                 trans_filter_free( op, fl );
1182         if ( fr )
1183                 trans_filter_free( op, fr );
1184
1185         return rc;
1186 }
1187
1188
1189 /*
1190 ** translucent_bind()
1191 **      pass bind request to captive backend;
1192 **
1193 */
1194
1195 static int translucent_bind(Operation *op, SlapReply *rs) {
1196         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1197         translucent_info *ov = on->on_bi.bi_private;
1198         BackendDB *db;
1199         slap_callback sc = { 0 }, *save_cb;
1200         int rc;
1201
1202         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
1203                 op->o_req_dn.bv_val, op->orb_method, 0);
1204
1205         if(ov->defer_db_open) {
1206                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1207                         "remote DB not available");
1208                 return(rs->sr_err);
1209         }
1210
1211         if (ov->bind_local) {
1212                 sc.sc_response = slap_null_cb;
1213                 save_cb = op->o_callback;
1214                 op->o_callback = &sc;
1215         }
1216
1217         db = op->o_bd;
1218         op->o_bd = &ov->db;
1219         ov->db.be_acl = op->o_bd->be_acl;
1220         rc = ov->db.bd_info->bi_op_bind(op, rs);
1221         op->o_bd = db;
1222
1223         if (ov->bind_local) {
1224                 op->o_callback = save_cb;
1225                 if (rc != LDAP_SUCCESS) {
1226                         rc = SLAP_CB_CONTINUE;
1227                 }
1228         }
1229
1230         return rc;
1231 }
1232
1233 /*
1234 ** translucent_connection_destroy()
1235 **      pass disconnect notification to captive backend;
1236 **
1237 */
1238
1239 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
1240         slap_overinst *on = (slap_overinst *) be->bd_info;
1241         translucent_info *ov = on->on_bi.bi_private;
1242         int rc = 0;
1243
1244         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
1245
1246         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
1247
1248         return(rc);
1249 }
1250
1251 /*
1252 ** translucent_db_config()
1253 **      pass config directives to captive backend;
1254 **      parse unrecognized directives ourselves;
1255 **
1256 */
1257
1258 static int translucent_db_config(
1259         BackendDB       *be,
1260         const char      *fname,
1261         int             lineno,
1262         int             argc,
1263         char            **argv
1264 )
1265 {
1266         slap_overinst *on = (slap_overinst *) be->bd_info;
1267         translucent_info *ov = on->on_bi.bi_private;
1268
1269         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
1270               argc ? argv[0] : "", 0, 0);
1271
1272         /* Something for the captive database? */
1273         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
1274                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
1275                         argc, argv );
1276         return SLAP_CONF_UNKNOWN;
1277 }
1278
1279 /*
1280 ** translucent_db_init()
1281 **      initialize the captive backend;
1282 **
1283 */
1284
1285 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
1286         slap_overinst *on = (slap_overinst *) be->bd_info;
1287         translucent_info *ov;
1288
1289         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
1290
1291         ov = ch_calloc(1, sizeof(translucent_info));
1292         on->on_bi.bi_private = ov;
1293         ov->db = *be;
1294         ov->db.be_private = NULL;
1295         ov->defer_db_open = 1;
1296
1297         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
1298                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
1299                 return 1;
1300         }
1301         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
1302         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
1303
1304         return 0;
1305 }
1306
1307 /*
1308 ** translucent_db_open()
1309 **      if the captive backend has an open() method, call it;
1310 **
1311 */
1312
1313 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
1314         slap_overinst *on = (slap_overinst *) be->bd_info;
1315         translucent_info *ov = on->on_bi.bi_private;
1316         int rc;
1317
1318         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
1319
1320         /* need to inherit something from the original database... */
1321         ov->db.be_def_limit = be->be_def_limit;
1322         ov->db.be_limits = be->be_limits;
1323         ov->db.be_acl = be->be_acl;
1324         ov->db.be_dfltaccess = be->be_dfltaccess;
1325
1326         if ( ov->defer_db_open )
1327                 return 0;
1328
1329         rc = backend_startup_one( &ov->db, cr );
1330
1331         if(rc) Debug(LDAP_DEBUG_TRACE,
1332                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
1333
1334         return(rc);
1335 }
1336
1337 /*
1338 ** translucent_db_close()
1339 **      if the captive backend has a close() method, call it
1340 **
1341 */
1342
1343 static int
1344 translucent_db_close( BackendDB *be, ConfigReply *cr )
1345 {
1346         slap_overinst *on = (slap_overinst *) be->bd_info;
1347         translucent_info *ov = on->on_bi.bi_private;
1348         int rc = 0;
1349
1350         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
1351
1352         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
1353                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
1354         }
1355
1356         return(rc);
1357 }
1358
1359 /*
1360 ** translucent_db_destroy()
1361 **      if the captive backend has a db_destroy() method, call it;
1362 **      free any config data
1363 **
1364 */
1365
1366 static int
1367 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
1368 {
1369         slap_overinst *on = (slap_overinst *) be->bd_info;
1370         translucent_info *ov = on->on_bi.bi_private;
1371         int rc = 0;
1372
1373         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
1374
1375         if ( ov ) {
1376                 if ( ov->remote )
1377                         anlist_free( ov->remote, 1, NULL );
1378                 if ( ov->local )
1379                         anlist_free( ov->local, 1, NULL );
1380                 if ( ov->db.be_private != NULL ) {
1381                         backend_stopdown_one( &ov->db );
1382                 }
1383
1384                 ch_free(ov);
1385                 on->on_bi.bi_private = NULL;
1386         }
1387
1388         return(rc);
1389 }
1390
1391 /*
1392 ** translucent_initialize()
1393 **      initialize the slap_overinst with our entry points;
1394 **
1395 */
1396
1397 int translucent_initialize() {
1398
1399         int rc;
1400
1401         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
1402
1403         translucent.on_bi.bi_type       = "translucent";
1404         translucent.on_bi.bi_db_init    = translucent_db_init;
1405         translucent.on_bi.bi_db_config  = translucent_db_config;
1406         translucent.on_bi.bi_db_open    = translucent_db_open;
1407         translucent.on_bi.bi_db_close   = translucent_db_close;
1408         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
1409         translucent.on_bi.bi_op_bind    = translucent_bind;
1410         translucent.on_bi.bi_op_add     = translucent_add;
1411         translucent.on_bi.bi_op_modify  = translucent_modify;
1412         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
1413         translucent.on_bi.bi_op_delete  = translucent_delete;
1414         translucent.on_bi.bi_op_search  = translucent_search;
1415         translucent.on_bi.bi_op_compare = translucent_compare;
1416         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
1417         translucent.on_bi.bi_extended   = translucent_exop;
1418
1419         translucent.on_bi.bi_cf_ocs = translucentocs;
1420         rc = config_register_schema ( translucentcfg, translucentocs );
1421         if ( rc ) return rc;
1422
1423         return(overlay_register(&translucent));
1424 }
1425
1426 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
1427 int init_module(int argc, char *argv[]) {
1428         return translucent_initialize();
1429 }
1430 #endif
1431
1432 #endif /* SLAPD_OVER_TRANSLUCENT */