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 2004-2006 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->msg, "olcDatabase=%s",
 107                              ov->db.bd_info->bi_type );
 108         bv.bv_val = ca->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_vals = ch_malloc(sizeof(struct berval) * 3);
 151         ber_dupbv(&a->a_vals[0], &glue[0]);
 152         ber_dupbv(&a->a_vals[1], &glue[1]);
 153         ber_dupbv(&a->a_vals[2], &glue[2]);
 154         a->a_nvals = a->a_vals;
 155         a->a_next = e->e_attrs;
 156         e->e_attrs = a;
 157
 158         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 159         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 160         ber_dupbv(&a->a_vals[0], &glue[1]);
 161         ber_dupbv(&a->a_vals[1], &glue[2]);
 162         a->a_nvals = a->a_vals;
 163         a->a_next = e->e_attrs;
 164         e->e_attrs = a;
 165
 166         nop.o_req_dn = ndn;
 167         nop.o_req_ndn = ndn;
 168         nop.ora_e = e;
 169
 170         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 171         syncrepl_add_glue(&nop, e);
 172         nop.o_bd->bd_info = (BackendInfo *) on;
 173
 174         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 175
 176         return;
 177 }
 178
 179 /*
 180 ** dup_bervarray()
 181 **      copy a BerVarray;
 182 */
 183
 184 BerVarray dup_bervarray(BerVarray b) {
 185         int i, len;
 186         BerVarray nb;
 187         for(len = 0; b[len].bv_val; len++);
 188         nb = ch_malloc((len+1) * sizeof(BerValue));
 189         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 190         nb[len].bv_val = NULL;
 191         nb[len].bv_len = 0;
 192         return(nb);
 193 }
 194
 195 /*
 196 ** free_attr_chain()
 197 **      free only the Attribute*, not the contents;
 198 **
 199 */
 200 void free_attr_chain(Attribute *b) {
 201         Attribute *a;
 202         for(a=b; a; a=a->a_next) {
 203                 a->a_vals = NULL;
 204                 a->a_nvals = NULL;
 205         }
 206         attrs_free( b );
 207         return;
 208 }
 209
 210 /*
 211 ** translucent_add()
 212 **      if not bound as root, send ACCESS error;
 213 **      if glue, glue_parent();
 214 **      return CONTINUE;
 215 **
 216 */
 217
 218 static int translucent_add(Operation *op, SlapReply *rs) {
 219         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 220         translucent_info *ov = on->on_bi.bi_private;
 221         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 222                 op->o_req_dn.bv_val, 0, 0);
 223         if(!be_isroot(op)) {
 224                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 225                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 226                         "user modification of overlay database not permitted");
 227                 op->o_bd->bd_info = (BackendInfo *) on;
 228                 return(rs->sr_err);
 229         }
 230         if(!ov->no_glue) glue_parent(op);
 231         return(SLAP_CB_CONTINUE);
 232 }
 233
 234 /*
 235 ** translucent_modrdn()
 236 **      if not bound as root, send ACCESS error;
 237 **      if !glue, glue_parent();
 238 **      else return CONTINUE;
 239 **
 240 */
 241
 242 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 243         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 244         translucent_info *ov = on->on_bi.bi_private;
 245         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 246                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 247         if(!be_isroot(op)) {
 248                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 249                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 250                         "user modification of overlay database not permitted");
 251                 op->o_bd->bd_info = (BackendInfo *) on;
 252                 return(rs->sr_err);
 253         }
 254         if(!ov->no_glue) glue_parent(op);
 255         return(SLAP_CB_CONTINUE);
 256 }
 257
 258 /*
 259 ** translucent_delete()
 260 **      if not bound as root, send ACCESS error;
 261 **      else return CONTINUE;
 262 **
 263 */
 264
 265 static int translucent_delete(Operation *op, SlapReply *rs) {
 266         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 267         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 268                 op->o_req_dn.bv_val, 0, 0);
 269         if(!be_isroot(op)) {
 270                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 271                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 272                         "user modification of overlay database not permitted");
 273                 op->o_bd->bd_info = (BackendInfo *) on;
 274                 return(rs->sr_err);
 275         }
 276         return(SLAP_CB_CONTINUE);
 277 }
 278
 279 static int
 280 translucent_tag_cb( Operation *op, SlapReply *rs )
 281 {
 282         op->o_tag = LDAP_REQ_MODIFY;
 283         op->orm_modlist = op->o_callback->sc_private;
 284         rs->sr_tag = slap_req2res( op->o_tag );
 285
 286         return SLAP_CB_CONTINUE;
 287 }
 288
 289 /*
 290 ** translucent_modify()
 291 **      modify in local backend if exists in both;
 292 **      otherwise, add to local backend;
 293 **      fail if not defined in captive backend;
 294 **
 295 */
 296
 297 static int translucent_modify(Operation *op, SlapReply *rs) {
 298         SlapReply nrs = { REP_RESULT };
 299         Operation nop = *op;
 300
 301         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 302         translucent_info *ov = on->on_bi.bi_private;
 303         Entry *e = NULL, *re = NULL;
 304         Attribute *a, *ax;
 305         Modifications *m, *mm;
 306         int del, rc, erc = 0;
 307         slap_callback cb = { 0 };
 308
 309         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 310                 op->o_req_dn.bv_val, 0, 0);
 311
 312 /*
 313 ** fetch entry from the captive backend;
 314 ** if it did not exist, fail;
 315 ** release it, if captive backend supports this;
 316 **
 317 */
 318
 319         nop.o_bd = &ov->db;
 320         rc = ov->db.bd_info->bi_entry_get_rw(&nop, &nop.o_req_ndn, NULL, NULL, 0, &re);
 321         if(rc != LDAP_SUCCESS || re == NULL ) {
 322                 send_ldap_error((&nop), rs, LDAP_NO_SUCH_OBJECT,
 323                         "attempt to modify nonexistent local record");
 324                 return(rs->sr_err);
 325         }
 326         nop = *op;
 327 /*
 328 ** fetch entry from local backend;
 329 ** if it exists:
 330 **      foreach Modification:
 331 **          if attr not present in local:
 332 **              if Mod == LDAP_MOD_DELETE:
 333 **                  if remote attr not present, return NO_SUCH;
 334 **                  if remote attr present, drop this Mod;
 335 **              else force this Mod to LDAP_MOD_ADD;
 336 **      return CONTINUE;
 337 **
 338 */
 339
 340         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 341         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 342         op->o_bd->bd_info = (BackendInfo *) on;
 343
 344         if(e && rc == LDAP_SUCCESS) {
 345                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 346                 for(m = op->orm_modlist; m; m = m->sml_next) {
 347                         for(a = e->e_attrs; a; a = a->a_next)
 348                                 if(a->a_desc == m->sml_desc) break;
 349                         if(a) continue;         /* found local attr */
 350                         if(m->sml_op == LDAP_MOD_DELETE) {
 351                                 for(a = re->e_attrs; a; a = a->a_next)
 352                                         if(a->a_desc == m->sml_desc) break;
 353                                 /* not found remote attr */
 354                                 if(!a) {
 355                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 356                                         goto release;
 357                                 }
 358                                 if(ov->strict) {
 359                                         erc = LDAP_CONSTRAINT_VIOLATION;
 360                                         goto release;
 361                                 }
 362                                 Debug(LDAP_DEBUG_TRACE,
 363                                         "=> translucent_modify: silently dropping delete: %s\n",
 364                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 365                                 for(mm = op->orm_modlist; mm->sml_next != m; mm = mm->sml_next);
 366                                 mm->sml_next = m->sml_next;
 367                                 m->sml_next = NULL;
 368                                 slap_mods_free(m, 1);
 369                                 m = mm;
 370                                 continue;
 371                         }
 372                         m->sml_op = LDAP_MOD_ADD;
 373                 }
 374                 erc = SLAP_CB_CONTINUE;
 375 release:
 376                 if(re) {
 377                         if(ov->db.bd_info->bi_entry_release_rw)
 378                                 ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 379                         else
 380                                 entry_free(re);
 381                 }
 382                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 383                 be_entry_release_r(op, e);
 384                 op->o_bd->bd_info = (BackendInfo *) on;
 385                 if(erc == SLAP_CB_CONTINUE) {
 386                         return(erc);
 387                 } else if(erc) {
 388                         send_ldap_error(op, rs, erc,
 389                                 "attempt to delete nonexistent attribute");
 390                         return(erc);
 391                 }
 392         }
 393
 394         /* don't leak remote entry copy */
 395         if(re) {
 396                 if(ov->db.bd_info->bi_entry_release_rw)
 397                         ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 398                 else
 399                         entry_free(re);
 400         }
 401 /*
 402 ** foreach Modification:
 403 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 404 ** if no Modifications were suitable:
 405 **      if strict, throw CONSTRAINT_VIOLATION;
 406 **      else, return early SUCCESS;
 407 ** fabricate Entry with new Attribute chain;
 408 ** glue_parent() for this Entry;
 409 ** call bi_op_add() in local backend;
 410 **
 411 */
 412
 413         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 414         a = NULL;
 415         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 416                 Attribute atmp;
 417                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 418                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 419                         Debug(LDAP_DEBUG_ANY,
 420                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 421                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 422                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 423                         continue;
 424                 }
 425                 atmp.a_desc = m->sml_desc;
 426                 atmp.a_vals = m->sml_values;
 427                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 428                 a = attr_dup( &atmp );
 429                 a->a_next  = ax;
 430                 ax = a;
 431         }
 432
 433         if(del && ov->strict) {
 434                 attrs_free( a );
 435                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 436                         "attempt to delete attributes from local database");
 437                 return(rs->sr_err);
 438         }
 439
 440         if(!ax) {
 441                 if(ov->strict) {
 442                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 443                                 "modification contained other than ADD or REPLACE");
 444                         return(rs->sr_err);
 445                 }
 446                 /* rs->sr_text = "no valid modification found"; */
 447                 rs->sr_err = LDAP_SUCCESS;
 448                 send_ldap_result(op, rs);
 449                 return(rs->sr_err);
 450         }
 451
 452         e = entry_alloc();
 453         ber_dupbv( &e->e_name, &op->o_req_dn );
 454         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 455         e->e_attrs = a;
 456
 457         nop.o_tag       = LDAP_REQ_ADD;
 458         nop.oq_add.rs_e = e;
 459
 460         glue_parent(&nop);
 461
 462         cb.sc_response = translucent_tag_cb;
 463         cb.sc_private = op->orm_modlist;
 464         cb.sc_next = nop.o_callback;
 465         nop.o_callback = &cb;
 466         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 467         if ( nop.ora_e == e )
 468                 entry_free( e );
 469
 470         return(rc);
 471 }
 472
 473 static int translucent_compare(Operation *op, SlapReply *rs) {
 474         Operation nop = *op;
 475         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 476         translucent_info *ov = on->on_bi.bi_private;
 477         AttributeAssertion *ava = op->orc_ava;
 478         Entry *e;
 479         int rc;
 480
 481         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 482                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 483
 484 /*
 485 ** if the local backend has an entry for this attribute:
 486 **      CONTINUE and let it do the compare;
 487 **
 488 */
 489         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 490         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 491         if(e && rc == LDAP_SUCCESS) {
 492                 be_entry_release_r(op, e);
 493                 op->o_bd->bd_info = (BackendInfo *) on;
 494                 return(SLAP_CB_CONTINUE);
 495         }
 496         op->o_bd->bd_info = (BackendInfo *) on;
 497
 498 /*
 499 ** call compare() in the captive backend;
 500 ** return the result;
 501 **
 502 */
 503         nop.o_bd = &ov->db;
 504         nop.o_callback = NULL;
 505         rc = ov->db.bd_info->bi_op_compare(&nop, rs);
 506
 507         return(rc);
 508 }
 509
 510 /*
 511 ** translucent_search_cb()
 512 **      merge local data with the search result
 513 **
 514 */
 515
 516 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 517         slap_overinst *on;
 518         Entry *e, *re = NULL;
 519         Attribute *a, *ax, *an, *as = NULL;
 520         Operation * original_op, local_op;
 521         int rc;
 522
 523         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 524                 return(SLAP_CB_CONTINUE);
 525
 526         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 527                 rs->sr_entry->e_name.bv_val, 0, 0);
 528
 529         original_op = op->o_callback->sc_private;
 530         on = (slap_overinst *) original_op->o_bd->bd_info;
 531         local_op = *original_op;
 532
 533         local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 534         rc = be_entry_get_rw(&local_op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 535         local_op.o_bd->bd_info = (BackendInfo *) on;
 536
 537 /*
 538 ** if we got an entry from local backend:
 539 **      make a copy of this search result;
 540 **      foreach local attr:
 541 **              foreach search result attr:
 542 **                      if match, result attr with local attr;
 543 **                      if new local, add to list;
 544 **      append new local attrs to search result;
 545 **
 546 */
 547
 548         if(e && rc == LDAP_SUCCESS) {
 549                 re = entry_dup(rs->sr_entry);
 550                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 551 #if 0
 552                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 553 #endif
 554                         for(a = re->e_attrs; a; a = a->a_next) {
 555                                 if(a->a_desc == ax->a_desc) {
 556                                         if(a->a_vals != a->a_nvals)
 557                                                 ber_bvarray_free(a->a_nvals);
 558                                         ber_bvarray_free(a->a_vals);
 559                                         a->a_vals = dup_bervarray(ax->a_vals);
 560                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 561                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 562                                         break;
 563                                 }
 564                         }
 565                         if(a) continue;
 566                         an = attr_dup(ax);
 567                         an->a_next = as;
 568                         as = an;
 569                 }
 570                 local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 571                 be_entry_release_r(&local_op, e);
 572                 local_op.o_bd->bd_info = (BackendInfo *) on;
 573
 574                 /* literally append, so locals are always last */
 575                 if(as) {
 576                         if(re->e_attrs) {
 577                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 578                                 ax->a_next = as;
 579                         } else {
 580                                 re->e_attrs = as;
 581                         }
 582                 }
 583                 rs->sr_entry = re;
 584                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 585         }
 586
 587         return(SLAP_CB_CONTINUE);
 588 }
 589
 590 /*
 591 ** translucent_search()
 592 **      search via captive backend;
 593 **      override results with any local data;
 594 **
 595 */
 596
 597 static int translucent_search(Operation *op, SlapReply *rs) {
 598         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 599         Operation nop = *op;
 600         translucent_info *ov = on->on_bi.bi_private;
 601         slap_callback cb = { NULL, NULL, NULL, NULL };
 602
 603         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 604                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 605
 606         cb.sc_response = (slap_response *) translucent_search_cb;
 607         cb.sc_private = op;
 608         cb.sc_next = nop.o_callback;
 609
 610         nop.o_callback = &cb;
 611         nop.o_bd = &ov->db;
 612         return (ov->db.bd_info->bi_op_search(&nop, rs));
 613 }
 614
 615
 616 /*
 617 ** translucent_bind()
 618 **      pass bind request to captive backend;
 619 **
 620 */
 621
 622 static int translucent_bind(Operation *op, SlapReply *rs) {
 623         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 624         Operation nop = *op;
 625         translucent_info *ov = on->on_bi.bi_private;
 626
 627         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 628                 op->o_req_dn.bv_val, op->orb_method, 0);
 629
 630         nop.o_bd = &ov->db;
 631         return (ov->db.bd_info->bi_op_bind(&nop, rs));
 632 }
 633
 634 /*
 635 ** translucent_connection_destroy()
 636 **      pass disconnect notification to captive backend;
 637 **
 638 */
 639
 640 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
 641         slap_overinst *on = (slap_overinst *) be->bd_info;
 642         translucent_info *ov = on->on_bi.bi_private;
 643         int rc = 0;
 644
 645         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
 646
 647         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
 648
 649         return(rc);
 650 }
 651
 652 /*
 653 ** translucent_db_config()
 654 **      pass config directives to captive backend;
 655 **      parse unrecognized directives ourselves;
 656 **
 657 */
 658
 659 static int translucent_db_config(
 660         BackendDB       *be,
 661         const char      *fname,
 662         int             lineno,
 663         int             argc,
 664         char            **argv
 665 )
 666 {
 667         slap_overinst *on = (slap_overinst *) be->bd_info;
 668         translucent_info *ov = on->on_bi.bi_private;
 669
 670         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
 671               argc ? argv[0] : "", 0, 0);
 672
 673         /* Something for the captive database? */
 674         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
 675                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
 676                         argc, argv );
 677         return SLAP_CONF_UNKNOWN;
 678 }
 679
 680 /*
 681 ** translucent_db_init()
 682 **      initialize the captive backend;
 683 **
 684 */
 685
 686 static int translucent_db_init(BackendDB *be) {
 687         slap_overinst *on = (slap_overinst *) be->bd_info;
 688         translucent_info *ov;
 689         int rc;
 690
 691         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
 692
 693         ov = ch_calloc(1, sizeof(translucent_info));
 694         on->on_bi.bi_private = ov;
 695         ov->db = *be;
 696         ov->db.be_private = NULL;
 697         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
 698
 699         if ( !backend_db_init( "ldap", &ov->db )) {
 700                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
 701                 return 1;
 702         }
 703         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 704         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
 705
 706         return 0;
 707 }
 708
 709 /*
 710 ** translucent_db_open()
 711 **      if the captive backend has an open() method, call it;
 712 **
 713 */
 714
 715 static int translucent_db_open(BackendDB *be) {
 716         slap_overinst *on = (slap_overinst *) be->bd_info;
 717         translucent_info *ov = on->on_bi.bi_private;
 718         int rc;
 719
 720         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
 721
 722         /* need to inherit something from the original database... */
 723         ov->db.be_def_limit = be->be_def_limit;
 724         ov->db.be_limits = be->be_limits;
 725         ov->db.be_acl = be->be_acl;
 726         ov->db.be_dfltaccess = be->be_dfltaccess;
 727
 728         rc = backend_startup_one( &ov->db );
 729
 730         if(rc) Debug(LDAP_DEBUG_TRACE,
 731                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 732
 733         return(rc);
 734 }
 735
 736 /*
 737 ** translucent_db_close()
 738 **      if the captive backend has a close() method, call it;
 739 **      free any config data;
 740 **
 741 */
 742
 743 static int
 744 translucent_db_close( BackendDB *be )
 745 {
 746         slap_overinst *on = (slap_overinst *) be->bd_info;
 747         translucent_info *ov = on->on_bi.bi_private;
 748         int rc = 0;
 749
 750         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
 751
 752         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
 753                 rc = ov->db.bd_info->bi_db_close(&ov->db);
 754         }
 755
 756         return(rc);
 757 }
 758
 759 /*
 760 ** translucent_db_destroy()
 761 **      if the captive backend has a db_destroy() method, call it
 762 **
 763 */
 764
 765 static int
 766 translucent_db_destroy( BackendDB *be )
 767 {
 768         slap_overinst *on = (slap_overinst *) be->bd_info;
 769         translucent_info *ov = on->on_bi.bi_private;
 770         int rc = 0;
 771
 772         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
 773
 774         if ( ov ) {
 775                 if ( ov->db.be_private != NULL ) {
 776                         backend_stopdown_one( &ov->db );
 777                 }
 778
 779                 ch_free(ov);
 780                 on->on_bi.bi_private = NULL;
 781         }
 782
 783         return(rc);
 784 }
 785
 786 /*
 787 ** translucent_initialize()
 788 **      initialize the slap_overinst with our entry points;
 789 **
 790 */
 791
 792 int translucent_initialize() {
 793
 794         int rc;
 795
 796         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
 797
 798         translucent.on_bi.bi_type       = "translucent";
 799         translucent.on_bi.bi_db_init    = translucent_db_init;
 800         translucent.on_bi.bi_db_config  = translucent_db_config;
 801         translucent.on_bi.bi_db_open    = translucent_db_open;
 802         translucent.on_bi.bi_db_close   = translucent_db_close;
 803         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
 804         translucent.on_bi.bi_op_bind    = translucent_bind;
 805         translucent.on_bi.bi_op_add     = translucent_add;
 806         translucent.on_bi.bi_op_modify  = translucent_modify;
 807         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 808         translucent.on_bi.bi_op_delete  = translucent_delete;
 809         translucent.on_bi.bi_op_search  = translucent_search;
 810         translucent.on_bi.bi_op_compare = translucent_compare;
 811         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
 812
 813         translucent.on_bi.bi_cf_ocs = translucentocs;
 814         rc = config_register_schema ( translucentcfg, translucentocs );
 815         if ( rc ) return rc;
 816
 817         return(overlay_register(&translucent));
 818 }
 819
 820 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
 821 int init_module(int argc, char *argv[]) {
 822         return translucent_initialize();
 823 }
 824 #endif
 825
 826 #endif /* SLAPD_OVER_TRANSLUCENT */