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 2004-2007 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         int strict;
  40         int no_glue;
  41 } translucent_info;
  42
  43 static ConfigLDAPadd translucent_ldadd;
  44 static ConfigCfAdd translucent_cfadd;
  45
  46 static ConfigTable translucentcfg[] = {
  47         { "translucent_strict", "on|off", 1, 2, 0,
  48           ARG_ON_OFF|ARG_OFFSET,
  49           (void *)offsetof(translucent_info, strict),
  50           "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
  51           "DESC 'Reveal attribute deletion constraint violations' "
  52           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  53         { "translucent_no_glue", "on|off", 1, 2, 0,
  54           ARG_ON_OFF|ARG_OFFSET,
  55           (void *)offsetof(translucent_info, no_glue),
  56           "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
  57           "DESC 'Disable automatic glue records for ADD and MODRDN' "
  58           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  59         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  60 };
  61
  62 static ConfigOCs translucentocs[] = {
  63         { "( OLcfgOvOc:14.1 "
  64           "NAME 'olcTranslucentConfig' "
  65           "DESC 'Translucent configuration' "
  66           "SUP olcOverlayConfig "
  67           "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue ) )",
  68           Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
  69         { "( OLcfgOvOc:14.2 "
  70           "NAME 'olcTranslucentDatabase' "
  71           "DESC 'Translucent target database configuration' "
  72           "AUXILIARY )", Cft_Misc, translucentcfg, translucent_ldadd },
  73         { NULL, 0, NULL }
  74 };
  75 /* for translucent_init() */
  76
  77 static int
  78 translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
  79 {
  80         slap_overinst *on;
  81         translucent_info *ov;
  82
  83         Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
  84
  85         if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
  86              cei->ce_bi->bi_cf_ocs != translucentocs )
  87                 return LDAP_CONSTRAINT_VIOLATION;
  88
  89         on = (slap_overinst *)cei->ce_bi;
  90         ov = on->on_bi.bi_private;
  91         ca->be = &ov->db;
  92         return LDAP_SUCCESS;
  93 }
  94
  95 static int
  96 translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
  97 {
  98         CfEntryInfo *cei = e->e_private;
  99         slap_overinst *on = (slap_overinst *)cei->ce_bi;
 100         translucent_info *ov = on->on_bi.bi_private;
 101         struct berval bv;
 102
 103         Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
 104
 105         /* FIXME: should not hardcode "olcDatabase" here */
 106         bv.bv_len = sprintf( ca->cr_msg, "olcDatabase=%s",
 107                              ov->db.bd_info->bi_type );
 108         bv.bv_val = ca->cr_msg;
 109         ca->be = &ov->db;
 110
 111         /* We can only create this entry if the database is table-driven
 112          */
 113         if ( ov->db.bd_info->bi_cf_ocs )
 114                 config_build_entry( op, rs, cei, ca, &bv,
 115                                     ov->db.bd_info->bi_cf_ocs,
 116                                     &translucentocs[1] );
 117
 118         return 0;
 119 }
 120
 121 static slap_overinst translucent;
 122
 123 /*
 124 ** glue_parent()
 125 **      call syncrepl_add_glue() with the parent suffix;
 126 **
 127 */
 128
 129 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 130
 131 void glue_parent(Operation *op) {
 132         Operation nop = *op;
 133         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 134         struct berval ndn = BER_BVNULL;
 135         Attribute *a;
 136         Entry *e;
 137         struct berval   pdn;
 138
 139         dnParent( &op->o_req_ndn, &pdn );
 140         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 141
 142         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 143
 144         e = entry_alloc();
 145         e->e_id = NOID;
 146         ber_dupbv(&e->e_name, &ndn);
 147         ber_dupbv(&e->e_nname, &ndn);
 148
 149         a = attr_alloc( slap_schema.si_ad_objectClass );
 150         a->a_numvals = 2;
 151         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 152         ber_dupbv(&a->a_vals[0], &glue[0]);
 153         ber_dupbv(&a->a_vals[1], &glue[1]);
 154         ber_dupbv(&a->a_vals[2], &glue[2]);
 155         a->a_nvals = a->a_vals;
 156         a->a_next = e->e_attrs;
 157         e->e_attrs = a;
 158
 159         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 160         a->a_numvals = 1;
 161         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 162         ber_dupbv(&a->a_vals[0], &glue[1]);
 163         ber_dupbv(&a->a_vals[1], &glue[2]);
 164         a->a_nvals = a->a_vals;
 165         a->a_next = e->e_attrs;
 166         e->e_attrs = a;
 167
 168         nop.o_req_dn = ndn;
 169         nop.o_req_ndn = ndn;
 170         nop.ora_e = e;
 171
 172         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 173         syncrepl_add_glue(&nop, e);
 174         nop.o_bd->bd_info = (BackendInfo *) on;
 175
 176         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 177
 178         return;
 179 }
 180
 181 /*
 182 ** dup_bervarray()
 183 **      copy a BerVarray;
 184 */
 185
 186 BerVarray dup_bervarray(BerVarray b) {
 187         int i, len;
 188         BerVarray nb;
 189         for(len = 0; b[len].bv_val; len++);
 190         nb = ch_malloc((len+1) * sizeof(BerValue));
 191         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 192         nb[len].bv_val = NULL;
 193         nb[len].bv_len = 0;
 194         return(nb);
 195 }
 196
 197 /*
 198 ** free_attr_chain()
 199 **      free only the Attribute*, not the contents;
 200 **
 201 */
 202 void free_attr_chain(Attribute *b) {
 203         Attribute *a;
 204         for(a=b; a; a=a->a_next) {
 205                 a->a_vals = NULL;
 206                 a->a_nvals = NULL;
 207         }
 208         attrs_free( b );
 209         return;
 210 }
 211
 212 /*
 213 ** translucent_add()
 214 **      if not bound as root, send ACCESS error;
 215 **      if glue, glue_parent();
 216 **      return CONTINUE;
 217 **
 218 */
 219
 220 static int translucent_add(Operation *op, SlapReply *rs) {
 221         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 222         translucent_info *ov = on->on_bi.bi_private;
 223         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 224                 op->o_req_dn.bv_val, 0, 0);
 225         if(!be_isroot(op)) {
 226                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 227                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 228                         "user modification of overlay database not permitted");
 229                 op->o_bd->bd_info = (BackendInfo *) on;
 230                 return(rs->sr_err);
 231         }
 232         if(!ov->no_glue) glue_parent(op);
 233         return(SLAP_CB_CONTINUE);
 234 }
 235
 236 /*
 237 ** translucent_modrdn()
 238 **      if not bound as root, send ACCESS error;
 239 **      if !glue, glue_parent();
 240 **      else return CONTINUE;
 241 **
 242 */
 243
 244 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 245         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 246         translucent_info *ov = on->on_bi.bi_private;
 247         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 248                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 249         if(!be_isroot(op)) {
 250                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 251                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 252                         "user modification of overlay database not permitted");
 253                 op->o_bd->bd_info = (BackendInfo *) on;
 254                 return(rs->sr_err);
 255         }
 256         if(!ov->no_glue) glue_parent(op);
 257         return(SLAP_CB_CONTINUE);
 258 }
 259
 260 /*
 261 ** translucent_delete()
 262 **      if not bound as root, send ACCESS error;
 263 **      else return CONTINUE;
 264 **
 265 */
 266
 267 static int translucent_delete(Operation *op, SlapReply *rs) {
 268         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 269         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 270                 op->o_req_dn.bv_val, 0, 0);
 271         if(!be_isroot(op)) {
 272                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 273                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 274                         "user modification of overlay database not permitted");
 275                 op->o_bd->bd_info = (BackendInfo *) on;
 276                 return(rs->sr_err);
 277         }
 278         return(SLAP_CB_CONTINUE);
 279 }
 280
 281 static int
 282 translucent_tag_cb( Operation *op, SlapReply *rs )
 283 {
 284         op->o_tag = LDAP_REQ_MODIFY;
 285         op->orm_modlist = op->o_callback->sc_private;
 286         rs->sr_tag = slap_req2res( op->o_tag );
 287
 288         return SLAP_CB_CONTINUE;
 289 }
 290
 291 /*
 292 ** translucent_modify()
 293 **      modify in local backend if exists in both;
 294 **      otherwise, add to local backend;
 295 **      fail if not defined in captive backend;
 296 **
 297 */
 298
 299 static int translucent_modify(Operation *op, SlapReply *rs) {
 300         SlapReply nrs = { REP_RESULT };
 301         Operation nop = *op;
 302
 303         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 304         translucent_info *ov = on->on_bi.bi_private;
 305         Entry *e = NULL, *re = NULL;
 306         Attribute *a, *ax;
 307         Modifications *m, **mm;
 308         int del, rc, erc = 0;
 309         slap_callback cb = { 0 };
 310
 311         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 312                 op->o_req_dn.bv_val, 0, 0);
 313
 314 /*
 315 ** fetch entry from the captive backend;
 316 ** if it did not exist, fail;
 317 ** release it, if captive backend supports this;
 318 **
 319 */
 320
 321         nop.o_bd = &ov->db;
 322         rc = ov->db.bd_info->bi_entry_get_rw(&nop, &nop.o_req_ndn, NULL, NULL, 0, &re);
 323         if(rc != LDAP_SUCCESS || re == NULL ) {
 324                 send_ldap_error((&nop), rs, LDAP_NO_SUCH_OBJECT,
 325                         "attempt to modify nonexistent local record");
 326                 return(rs->sr_err);
 327         }
 328         nop = *op;
 329 /*
 330 ** fetch entry from local backend;
 331 ** if it exists:
 332 **      foreach Modification:
 333 **          if attr not present in local:
 334 **              if Mod == LDAP_MOD_DELETE:
 335 **                  if remote attr not present, return NO_SUCH;
 336 **                  if remote attr present, drop this Mod;
 337 **              else force this Mod to LDAP_MOD_ADD;
 338 **      return CONTINUE;
 339 **
 340 */
 341
 342         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 343         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 344         op->o_bd->bd_info = (BackendInfo *) on;
 345
 346         if(e && rc == LDAP_SUCCESS) {
 347                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 348                 for(mm = &op->orm_modlist; *mm; ) {
 349                         m = *mm;
 350                         for(a = e->e_attrs; a; a = a->a_next)
 351                                 if(a->a_desc == m->sml_desc) break;
 352                         if(a) {
 353                                 mm = &m->sml_next;
 354                                 continue;               /* found local attr */
 355                         }
 356                         if(m->sml_op == LDAP_MOD_DELETE) {
 357                                 for(a = re->e_attrs; a; a = a->a_next)
 358                                         if(a->a_desc == m->sml_desc) break;
 359                                 /* not found remote attr */
 360                                 if(!a) {
 361                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 362                                         goto release;
 363                                 }
 364                                 if(ov->strict) {
 365                                         erc = LDAP_CONSTRAINT_VIOLATION;
 366                                         goto release;
 367                                 }
 368                                 Debug(LDAP_DEBUG_TRACE,
 369                                         "=> translucent_modify: silently dropping delete: %s\n",
 370                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 371                                 *mm = m->sml_next;
 372                                 m->sml_next = NULL;
 373                                 slap_mods_free(m, 1);
 374                                 continue;
 375                         }
 376                         m->sml_op = LDAP_MOD_ADD;
 377                         mm = &m->sml_next;
 378                 }
 379                 erc = SLAP_CB_CONTINUE;
 380 release:
 381                 if(re) {
 382                         if(ov->db.bd_info->bi_entry_release_rw)
 383                                 ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 384                         else
 385                                 entry_free(re);
 386                 }
 387                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 388                 be_entry_release_r(op, e);
 389                 op->o_bd->bd_info = (BackendInfo *) on;
 390                 if(erc == SLAP_CB_CONTINUE) {
 391                         return(erc);
 392                 } else if(erc) {
 393                         send_ldap_error(op, rs, erc,
 394                                 "attempt to delete nonexistent attribute");
 395                         return(erc);
 396                 }
 397         }
 398
 399         /* don't leak remote entry copy */
 400         if(re) {
 401                 if(ov->db.bd_info->bi_entry_release_rw)
 402                         ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 403                 else
 404                         entry_free(re);
 405         }
 406 /*
 407 ** foreach Modification:
 408 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 409 ** if no Modifications were suitable:
 410 **      if strict, throw CONSTRAINT_VIOLATION;
 411 **      else, return early SUCCESS;
 412 ** fabricate Entry with new Attribute chain;
 413 ** glue_parent() for this Entry;
 414 ** call bi_op_add() in local backend;
 415 **
 416 */
 417
 418         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 419         a = NULL;
 420         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 421                 Attribute atmp;
 422                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 423                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 424                         Debug(LDAP_DEBUG_ANY,
 425                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 426                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 427                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 428                         continue;
 429                 }
 430                 atmp.a_desc = m->sml_desc;
 431                 atmp.a_vals = m->sml_values;
 432                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 433                 atmp.a_numvals = m->sml_numvals;
 434                 atmp.a_flags = 0;
 435                 a = attr_dup( &atmp );
 436                 a->a_next  = ax;
 437                 ax = a;
 438         }
 439
 440         if(del && ov->strict) {
 441                 attrs_free( a );
 442                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 443                         "attempt to delete attributes from local database");
 444                 return(rs->sr_err);
 445         }
 446
 447         if(!ax) {
 448                 if(ov->strict) {
 449                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 450                                 "modification contained other than ADD or REPLACE");
 451                         return(rs->sr_err);
 452                 }
 453                 /* rs->sr_text = "no valid modification found"; */
 454                 rs->sr_err = LDAP_SUCCESS;
 455                 send_ldap_result(op, rs);
 456                 return(rs->sr_err);
 457         }
 458
 459         e = entry_alloc();
 460         ber_dupbv( &e->e_name, &op->o_req_dn );
 461         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 462         e->e_attrs = a;
 463
 464         nop.o_tag       = LDAP_REQ_ADD;
 465         nop.oq_add.rs_e = e;
 466
 467         glue_parent(&nop);
 468
 469         cb.sc_response = translucent_tag_cb;
 470         cb.sc_private = op->orm_modlist;
 471         cb.sc_next = nop.o_callback;
 472         nop.o_callback = &cb;
 473         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 474         if ( nop.ora_e == e )
 475                 entry_free( e );
 476
 477         return(rc);
 478 }
 479
 480 static int translucent_compare(Operation *op, SlapReply *rs) {
 481         Operation nop = *op;
 482         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 483         translucent_info *ov = on->on_bi.bi_private;
 484         AttributeAssertion *ava = op->orc_ava;
 485         Entry *e;
 486         int rc;
 487
 488         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 489                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 490
 491 /*
 492 ** if the local backend has an entry for this attribute:
 493 **      CONTINUE and let it do the compare;
 494 **
 495 */
 496         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 497         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 498         if(e && rc == LDAP_SUCCESS) {
 499                 be_entry_release_r(op, e);
 500                 op->o_bd->bd_info = (BackendInfo *) on;
 501                 return(SLAP_CB_CONTINUE);
 502         }
 503         op->o_bd->bd_info = (BackendInfo *) on;
 504
 505 /*
 506 ** call compare() in the captive backend;
 507 ** return the result;
 508 **
 509 */
 510         nop.o_bd = &ov->db;
 511         nop.o_callback = NULL;
 512         rc = ov->db.bd_info->bi_op_compare(&nop, rs);
 513
 514         return(rc);
 515 }
 516
 517 /*
 518 ** translucent_search_cb()
 519 **      merge local data with the search result
 520 **
 521 */
 522
 523 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 524         slap_overinst *on;
 525         Entry *e, *re = NULL;
 526         Attribute *a, *ax, *an, *as = NULL;
 527         Operation * original_op, local_op;
 528         int rc;
 529
 530         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 531                 return(SLAP_CB_CONTINUE);
 532
 533         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 534                 rs->sr_entry->e_name.bv_val, 0, 0);
 535
 536         original_op = op->o_callback->sc_private;
 537         on = (slap_overinst *) original_op->o_bd->bd_info;
 538         local_op = *original_op;
 539
 540         local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 541         rc = be_entry_get_rw(&local_op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 542         local_op.o_bd->bd_info = (BackendInfo *) on;
 543
 544 /*
 545 ** if we got an entry from local backend:
 546 **      make a copy of this search result;
 547 **      foreach local attr:
 548 **              foreach search result attr:
 549 **                      if match, result attr with local attr;
 550 **                      if new local, add to list;
 551 **      append new local attrs to search result;
 552 **
 553 */
 554
 555         if(e && rc == LDAP_SUCCESS) {
 556                 re = entry_dup(rs->sr_entry);
 557                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 558 #if 0
 559                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 560 #endif
 561                         for(a = re->e_attrs; a; a = a->a_next) {
 562                                 if(a->a_desc == ax->a_desc) {
 563                                         if(a->a_vals != a->a_nvals)
 564                                                 ber_bvarray_free(a->a_nvals);
 565                                         ber_bvarray_free(a->a_vals);
 566                                         a->a_vals = dup_bervarray(ax->a_vals);
 567                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 568                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 569                                         break;
 570                                 }
 571                         }
 572                         if(a) continue;
 573                         an = attr_dup(ax);
 574                         an->a_next = as;
 575                         as = an;
 576                 }
 577                 local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 578                 be_entry_release_r(&local_op, e);
 579                 local_op.o_bd->bd_info = (BackendInfo *) on;
 580
 581                 /* literally append, so locals are always last */
 582                 if(as) {
 583                         if(re->e_attrs) {
 584                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 585                                 ax->a_next = as;
 586                         } else {
 587                                 re->e_attrs = as;
 588                         }
 589                 }
 590                 rs->sr_entry = re;
 591                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 592         }
 593
 594         return(SLAP_CB_CONTINUE);
 595 }
 596
 597 /*
 598 ** translucent_search()
 599 **      search via captive backend;
 600 **      override results with any local data;
 601 **
 602 */
 603
 604 static int translucent_search(Operation *op, SlapReply *rs) {
 605         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 606         Operation nop = *op;
 607         translucent_info *ov = on->on_bi.bi_private;
 608         slap_callback cb = { NULL, NULL, NULL, NULL };
 609
 610         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 611                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 612
 613         cb.sc_response = (slap_response *) translucent_search_cb;
 614         cb.sc_private = op;
 615         cb.sc_next = nop.o_callback;
 616
 617         nop.o_callback = &cb;
 618         nop.o_bd = &ov->db;
 619         return (ov->db.bd_info->bi_op_search(&nop, rs));
 620 }
 621
 622
 623 /*
 624 ** translucent_bind()
 625 **      pass bind request to captive backend;
 626 **
 627 */
 628
 629 static int translucent_bind(Operation *op, SlapReply *rs) {
 630         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 631         Operation nop = *op;
 632         translucent_info *ov = on->on_bi.bi_private;
 633
 634         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 635                 op->o_req_dn.bv_val, op->orb_method, 0);
 636
 637         nop.o_bd = &ov->db;
 638         return (ov->db.bd_info->bi_op_bind(&nop, rs));
 639 }
 640
 641 /*
 642 ** translucent_connection_destroy()
 643 **      pass disconnect notification to captive backend;
 644 **
 645 */
 646
 647 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
 648         slap_overinst *on = (slap_overinst *) be->bd_info;
 649         translucent_info *ov = on->on_bi.bi_private;
 650         int rc = 0;
 651
 652         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
 653
 654         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
 655
 656         return(rc);
 657 }
 658
 659 /*
 660 ** translucent_db_config()
 661 **      pass config directives to captive backend;
 662 **      parse unrecognized directives ourselves;
 663 **
 664 */
 665
 666 static int translucent_db_config(
 667         BackendDB       *be,
 668         const char      *fname,
 669         int             lineno,
 670         int             argc,
 671         char            **argv
 672 )
 673 {
 674         slap_overinst *on = (slap_overinst *) be->bd_info;
 675         translucent_info *ov = on->on_bi.bi_private;
 676
 677         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
 678               argc ? argv[0] : "", 0, 0);
 679
 680         /* Something for the captive database? */
 681         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
 682                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
 683                         argc, argv );
 684         return SLAP_CONF_UNKNOWN;
 685 }
 686
 687 /*
 688 ** translucent_db_init()
 689 **      initialize the captive backend;
 690 **
 691 */
 692
 693 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
 694         slap_overinst *on = (slap_overinst *) be->bd_info;
 695         translucent_info *ov;
 696
 697         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
 698
 699         ov = ch_calloc(1, sizeof(translucent_info));
 700         on->on_bi.bi_private = ov;
 701         ov->db = *be;
 702         ov->db.be_private = NULL;
 703         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
 704
 705         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
 706                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
 707                 return 1;
 708         }
 709         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 710         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
 711
 712         return 0;
 713 }
 714
 715 /*
 716 ** translucent_db_open()
 717 **      if the captive backend has an open() method, call it;
 718 **
 719 */
 720
 721 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
 722         slap_overinst *on = (slap_overinst *) be->bd_info;
 723         translucent_info *ov = on->on_bi.bi_private;
 724         int rc;
 725
 726         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
 727
 728         /* need to inherit something from the original database... */
 729         ov->db.be_def_limit = be->be_def_limit;
 730         ov->db.be_limits = be->be_limits;
 731         ov->db.be_acl = be->be_acl;
 732         ov->db.be_dfltaccess = be->be_dfltaccess;
 733
 734         rc = backend_startup_one( &ov->db, NULL );
 735
 736         if(rc) Debug(LDAP_DEBUG_TRACE,
 737                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 738
 739         return(rc);
 740 }
 741
 742 /*
 743 ** translucent_db_close()
 744 **      if the captive backend has a close() method, call it;
 745 **      free any config data;
 746 **
 747 */
 748
 749 static int
 750 translucent_db_close( BackendDB *be, ConfigReply *cr )
 751 {
 752         slap_overinst *on = (slap_overinst *) be->bd_info;
 753         translucent_info *ov = on->on_bi.bi_private;
 754         int rc = 0;
 755
 756         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
 757
 758         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
 759                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
 760         }
 761
 762         return(rc);
 763 }
 764
 765 /*
 766 ** translucent_db_destroy()
 767 **      if the captive backend has a db_destroy() method, call it
 768 **
 769 */
 770
 771 static int
 772 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
 773 {
 774         slap_overinst *on = (slap_overinst *) be->bd_info;
 775         translucent_info *ov = on->on_bi.bi_private;
 776         int rc = 0;
 777
 778         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
 779
 780         if ( ov ) {
 781                 if ( ov->db.be_private != NULL ) {
 782                         backend_stopdown_one( &ov->db );
 783                 }
 784
 785                 ch_free(ov);
 786                 on->on_bi.bi_private = NULL;
 787         }
 788
 789         return(rc);
 790 }
 791
 792 /*
 793 ** translucent_initialize()
 794 **      initialize the slap_overinst with our entry points;
 795 **
 796 */
 797
 798 int translucent_initialize() {
 799
 800         int rc;
 801
 802         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
 803
 804         translucent.on_bi.bi_type       = "translucent";
 805         translucent.on_bi.bi_db_init    = translucent_db_init;
 806         translucent.on_bi.bi_db_config  = translucent_db_config;
 807         translucent.on_bi.bi_db_open    = translucent_db_open;
 808         translucent.on_bi.bi_db_close   = translucent_db_close;
 809         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
 810         translucent.on_bi.bi_op_bind    = translucent_bind;
 811         translucent.on_bi.bi_op_add     = translucent_add;
 812         translucent.on_bi.bi_op_modify  = translucent_modify;
 813         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 814         translucent.on_bi.bi_op_delete  = translucent_delete;
 815         translucent.on_bi.bi_op_search  = translucent_search;
 816         translucent.on_bi.bi_op_compare = translucent_compare;
 817         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
 818
 819         translucent.on_bi.bi_cf_ocs = translucentocs;
 820         rc = config_register_schema ( translucentcfg, translucentocs );
 821         if ( rc ) return rc;
 822
 823         return(overlay_register(&translucent));
 824 }
 825
 826 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
 827 int init_module(int argc, char *argv[]) {
 828         return translucent_initialize();
 829 }
 830 #endif
 831
 832 #endif /* SLAPD_OVER_TRANSLUCENT */