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 /* config block */
  35
  36 typedef struct translucent_configuration {
  37         int debug;
  38         int strict;
  39         int no_add;
  40         int glue;
  41 } translucent_configuration;
  42
  43 /* stack of captive backends */
  44
  45 typedef struct overlay_stack {
  46         BackendInfo *info;                      /* captive backend */
  47         void *private;                          /* local backend_private */
  48         translucent_configuration *config;      /* our_private: configuration */
  49 } overlay_stack;
  50
  51 /* for translucent_init() */
  52
  53 static slap_overinst translucent;
  54
  55 /*
  56 ** glue_parent()
  57 **      call syncrepl_add_glue() with the parent suffix;
  58 **
  59 */
  60
  61 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
  62
  63 void glue_parent(Operation *op) {
  64         Operation nop = *op;
  65         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
  66         struct berval ndn = BER_BVNULL;
  67         Attribute *a;
  68         Entry *e;
  69         struct berval   pdn;
  70
  71         dnParent( &op->o_req_ndn, &pdn );
  72         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
  73
  74         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
  75
  76         e = ch_calloc(1, sizeof(Entry));
  77         e->e_id = NOID;
  78         ber_dupbv(&e->e_name, &ndn);
  79         ber_dupbv(&e->e_nname, &ndn);
  80
  81         a = ch_calloc(1, sizeof(Attribute));
  82         a->a_desc = slap_schema.si_ad_objectClass;
  83         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
  84         ber_dupbv(&a->a_vals[0], &glue[0]);
  85         ber_dupbv(&a->a_vals[1], &glue[1]);
  86         ber_dupbv(&a->a_vals[2], &glue[2]);
  87         a->a_nvals = a->a_vals;
  88         a->a_next = e->e_attrs;
  89         e->e_attrs = a;
  90
  91         a = ch_calloc(1, sizeof(Attribute));
  92         a->a_desc = slap_schema.si_ad_structuralObjectClass;
  93         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
  94         ber_dupbv(&a->a_vals[0], &glue[1]);
  95         ber_dupbv(&a->a_vals[1], &glue[2]);
  96         a->a_nvals = a->a_vals;
  97         a->a_next = e->e_attrs;
  98         e->e_attrs = a;
  99
 100         nop.o_req_dn = ndn;
 101         nop.o_req_ndn = ndn;
 102         nop.ora_e = e;
 103         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 104
 105         syncrepl_add_glue(&nop, e);
 106
 107         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 108
 109         return;
 110 }
 111
 112 /*
 113 ** dup_bervarray()
 114 **      copy a BerVarray;
 115 */
 116
 117 BerVarray dup_bervarray(BerVarray b) {
 118         int i, len;
 119         BerVarray nb;
 120         for(len = 0; b[len].bv_val; len++);
 121         nb = ch_malloc((len+1) * sizeof(BerValue));
 122         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 123         nb[len].bv_val = NULL;
 124         nb[len].bv_len = 0;
 125         return(nb);
 126 }
 127
 128 /*
 129 ** free_attr_chain()
 130 **      free only the Attribute*, not the contents;
 131 **
 132 */
 133 void free_attr_chain(Attribute *a) {
 134         Attribute *ax;
 135         for(; a; a = ax) {
 136                 ax = a->a_next;
 137                 ch_free(a);
 138         }
 139         return;
 140 }
 141
 142 /*
 143 ** translucent_add()
 144 **      if not bound as root, send ACCESS error;
 145 **      if config.glue, glue_parent();
 146 **      return CONTINUE;
 147 **
 148 */
 149
 150 static int translucent_add(Operation *op, SlapReply *rs) {
 151         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 152         overlay_stack *ov = on->on_bi.bi_private;
 153         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 154                 op->o_req_dn.bv_val, 0, 0);
 155         if(!be_isroot(op)) {
 156                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 157                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 158                         "user modification of overlay database not permitted");
 159                 return(rs->sr_err);
 160         }
 161         if(!ov->config->glue) glue_parent(op);
 162         return(SLAP_CB_CONTINUE);
 163 }
 164
 165 /*
 166 ** translucent_modrdn()
 167 **      if not bound as root, send ACCESS error;
 168 **      if !config.glue, glue_parent();
 169 **      else return CONTINUE;
 170 **
 171 */
 172
 173 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 174         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 175         overlay_stack *ov = on->on_bi.bi_private;
 176         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 177                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 178         if(!be_isroot(op)) {
 179                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 180                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 181                         "user modification of overlay database not permitted");
 182                 return(rs->sr_err);
 183         }
 184         if(!ov->config->glue) glue_parent(op);
 185         return(SLAP_CB_CONTINUE);
 186 }
 187
 188 /*
 189 ** translucent_delete()
 190 **      if not bound as root, send ACCESS error;
 191 **      else return CONTINUE;
 192 **
 193 */
 194
 195 static int translucent_delete(Operation *op, SlapReply *rs) {
 196         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 197         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 198                 op->o_req_dn.bv_val, 0, 0);
 199         if(!be_isroot(op)) {
 200                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 201                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 202                         "user modification of overlay database not permitted");
 203                 return(rs->sr_err);
 204         }
 205         return(SLAP_CB_CONTINUE);
 206 }
 207
 208 static int
 209 translucent_tag_cb( Operation *op, SlapReply *rs )
 210 {
 211         op->o_tag = LDAP_REQ_MODIFY;
 212         op->orm_modlist = op->o_callback->sc_private;
 213         rs->sr_tag = slap_req2res( op->o_tag );
 214
 215         return SLAP_CB_CONTINUE;
 216 }
 217
 218 /*
 219 ** translucent_modify()
 220 **      modify in local backend if exists in both;
 221 **      otherwise, add to local backend;
 222 **      fail if not defined in captive backend;
 223 **
 224 */
 225
 226 static int translucent_modify(Operation *op, SlapReply *rs) {
 227         SlapReply nrs = { REP_RESULT };
 228         Operation nop = *op;
 229
 230         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 231         overlay_stack *ov = on->on_bi.bi_private;
 232         void *private = op->o_bd->be_private;
 233         Entry ne, *e = NULL, *re = NULL;
 234         Attribute *a, *ax;
 235         Modifications *m, **mm;
 236         int del, rc, erc = 0;
 237         slap_callback cb = { 0 };
 238
 239         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 240                 op->o_req_dn.bv_val, 0, 0);
 241
 242 /*
 243 ** fetch entry from the captive backend;
 244 ** if it did not exist, fail;
 245 ** release it, if captive backend supports this;
 246 **
 247 */
 248
 249         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 250         op->o_bd->be_private = ov->private;
 251         rc = ov->info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 252         op->o_bd->be_private = private;
 253
 254         /* if(ov->config->no_add && (!re || rc != LDAP_SUCCESS)) */
 255         if(rc != LDAP_SUCCESS || re == NULL ) {
 256                 send_ldap_error(op, rs, LDAP_NO_SUCH_OBJECT,
 257                         "attempt to modify nonexistent local record");
 258                 return(rs->sr_err);
 259         }
 260
 261 /*
 262 ** fetch entry from local backend;
 263 ** if it exists:
 264 **      foreach Modification:
 265 **          if attr not present in local:
 266 **              if Mod == LDAP_MOD_DELETE:
 267 **                  if remote attr not present, return NO_SUCH;
 268 **                  if remote attr present, drop this Mod;
 269 **              else force this Mod to LDAP_MOD_ADD;
 270 **      return CONTINUE;
 271 **
 272 */
 273
 274         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 275
 276         if(e && rc == LDAP_SUCCESS) {
 277                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 278                 for(mm = &op->orm_modlist; *mm; ) {
 279                         m = *mm;
 280                         for(a = e->e_attrs; a; a = a->a_next)
 281                                 if(a->a_desc == m->sml_desc) break;
 282                         if(a) {
 283                                 mm = &m->sml_next;
 284                                 continue;               /* found local attr */
 285                         }
 286                         if(m->sml_op == LDAP_MOD_DELETE) {
 287                                 for(a = re->e_attrs; a; a = a->a_next)
 288                                         if(a->a_desc == m->sml_desc) break;
 289                                 /* not found remote attr */
 290                                 if(!a) {
 291                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 292                                         goto release;
 293                                 }
 294                                 if(ov->config->strict) {
 295                                         erc = LDAP_CONSTRAINT_VIOLATION;
 296                                         goto release;
 297                                 }
 298                                 Debug(LDAP_DEBUG_TRACE,
 299                                         "=> translucent_modify: silently dropping delete: %s\n",
 300                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 301                                 *mm = m->sml_next;
 302                                 m->sml_next = NULL;
 303                                 slap_mods_free(m, 1);
 304                                 continue;
 305                         }
 306                         m->sml_op = LDAP_MOD_ADD;
 307                         mm = &m->sml_next;
 308                 }
 309                 erc = SLAP_CB_CONTINUE;
 310 release:
 311                 if(re) {
 312                         op->o_bd->be_private = ov->private;
 313                         if(ov->info->bi_entry_release_rw)
 314                                 ov->info->bi_entry_release_rw(op, re, 0);
 315                         else
 316                                 entry_free(re);
 317                         op->o_bd->be_private = private;
 318                 }
 319                 be_entry_release_r(op, e);
 320                 if(erc == SLAP_CB_CONTINUE) {
 321                         op->o_bd->bd_info = (BackendInfo *) on;
 322                         return(erc);
 323                 } else if(erc) {
 324                         send_ldap_error(op, rs, erc,
 325                                 "attempt to delete nonexistent attribute");
 326                         return(erc);
 327                 }
 328         }
 329
 330         /* don't leak remote entry copy */
 331         if(re) {
 332                 op->o_bd->be_private = ov->private;
 333                 if(ov->info->bi_entry_release_rw)
 334                         ov->info->bi_entry_release_rw(op, re, 0);
 335                 else
 336                         entry_free(re);
 337                 op->o_bd->be_private = private;
 338         }
 339 /*
 340 ** foreach Modification:
 341 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 342 ** if no Modifications were suitable:
 343 **      if config.strict, throw CONSTRAINT_VIOLATION;
 344 **      else, return early SUCCESS;
 345 ** fabricate Entry with new Attribute chain;
 346 ** glue_parent() for this Entry;
 347 ** call bi_op_add() in local backend;
 348 **
 349 */
 350
 351         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 352         a = NULL;
 353         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 354                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 355                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 356                         Debug(LDAP_DEBUG_ANY,
 357                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 358                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 359                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 360                         continue;
 361                 }
 362                 a = ch_calloc(1, sizeof(Attribute));
 363                 a->a_desc  = m->sml_desc;
 364                 a->a_vals  = m->sml_values;
 365                 a->a_nvals = m->sml_nvalues ? m->sml_nvalues : a->a_vals;
 366                 a->a_next  = ax;
 367                 ax = a;
 368         }
 369
 370         if(del && ov->config->strict) {
 371                 free_attr_chain(a);
 372                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 373                         "attempt to delete attributes from local database");
 374                 return(rs->sr_err);
 375         }
 376
 377         if(!ax) {
 378                 if(ov->config->strict) {
 379                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 380                                 "modification contained other than ADD or REPLACE");
 381                         return(rs->sr_err);
 382                 }
 383                 op->o_bd->bd_info = (BackendInfo *) on;
 384                 /* rs->sr_text = "no valid modification found"; */
 385                 rs->sr_err = LDAP_SUCCESS;
 386                 send_ldap_result(op, rs);
 387                 return(rs->sr_err);
 388         }
 389
 390         ne.e_id         = NOID;
 391         ne.e_name       = op->o_req_dn;
 392         ne.e_nname      = op->o_req_ndn;
 393         ne.e_attrs      = a;
 394         ne.e_ocflags    = 0;
 395         ne.e_bv.bv_len  = 0;
 396         ne.e_bv.bv_val  = NULL;
 397         ne.e_private    = NULL;
 398
 399         nop.o_tag       = LDAP_REQ_ADD;
 400         nop.oq_add.rs_e = &ne;
 401
 402         op->o_bd->bd_info = (BackendInfo *) on;
 403         glue_parent(&nop);
 404
 405         cb.sc_response = translucent_tag_cb;
 406         cb.sc_private = op->orm_modlist;
 407         cb.sc_next = nop.o_callback;
 408         nop.o_callback = &cb;
 409         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 410         free_attr_chain(a);
 411
 412         return(rc);
 413 }
 414
 415 static int translucent_compare(Operation *op, SlapReply *rs) {
 416         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 417         overlay_stack *ov = on->on_bi.bi_private;
 418         void *private = op->o_bd->be_private;
 419
 420         AttributeAssertion *ava = op->orc_ava;
 421         Entry *e;
 422         int rc;
 423
 424         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 425                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 426
 427 /*
 428 ** if the local backend has an entry for this attribute:
 429 **      CONTINUE and let it do the compare;
 430 **
 431 */
 432
 433         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 434         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 435         if(e && rc == LDAP_SUCCESS) {
 436                 be_entry_release_r(op, e);
 437                 op->o_bd->bd_info = (BackendInfo *) on;
 438                 return(SLAP_CB_CONTINUE);
 439         }
 440
 441 /*
 442 ** call compare() in the captive backend;
 443 ** return the result;
 444 **
 445 */
 446
 447         op->o_bd->be_private = ov->private;
 448         rc = ov->info->bi_op_compare(op, rs);
 449         op->o_bd->be_private = private;
 450         op->o_bd->bd_info = (BackendInfo *) on;
 451         return(rc);
 452 }
 453
 454 /*
 455 ** translucent_search_cb()
 456 **      merge local data with the search result
 457 **
 458 */
 459
 460 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 461         slap_overinst *on;
 462         Entry *e, *re = NULL;
 463         Attribute *a, *ax, *an, *as = NULL;
 464         void *private;
 465         int rc;
 466
 467         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 468                 return(SLAP_CB_CONTINUE);
 469
 470         Debug(LDAP_DEBUG_TRACE, "==> tranclucent_search_cb: %s\n",
 471                 rs->sr_entry->e_name.bv_val, 0, 0);
 472
 473         on = (slap_overinst *) op->o_bd->bd_info;
 474         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 475
 476         private = op->o_bd->be_private;
 477         op->o_bd->be_private = op->o_callback->sc_private;
 478
 479         rc = be_entry_get_rw(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 480
 481 /*
 482 ** if we got an entry from local backend:
 483 **      make a copy of this search result;
 484 **      foreach local attr:
 485 **              foreach search result attr:
 486 **                      if match, result attr with local attr;
 487 **                      if new local, add to list;
 488 **      append new local attrs to search result;
 489 **
 490 */
 491
 492         if(e && rc == LDAP_SUCCESS) {
 493                 re = entry_dup(rs->sr_entry);
 494                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 495 #if 0
 496                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 497 #endif
 498                         for(a = re->e_attrs; a; a = a->a_next) {
 499                                 if(a->a_desc == ax->a_desc) {
 500                                         if(a->a_vals != a->a_nvals)
 501                                                 ber_bvarray_free(a->a_nvals);
 502                                         ber_bvarray_free(a->a_vals);
 503                                         a->a_vals = dup_bervarray(ax->a_vals);
 504                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 505                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 506                                         break;
 507                                 }
 508                         }
 509                         if(a) continue;
 510                         an = attr_dup(ax);
 511                         an->a_next = as;
 512                         as = an;
 513                 }
 514                 be_entry_release_r(op, e);
 515
 516                 /* literally append, so locals are always last */
 517                 if(as) {
 518                         if(re->e_attrs) {
 519                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 520                                 ax->a_next = as;
 521                         } else {
 522                                 re->e_attrs = as;
 523                         }
 524                 }
 525                 rs->sr_entry = re;
 526                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 527         }
 528
 529         op->o_bd->be_private = private;
 530         op->o_bd->bd_info = (BackendInfo *) on;
 531
 532         return(SLAP_CB_CONTINUE);
 533 }
 534
 535 /*
 536 ** translucent_search()
 537 **      search via captive backend;
 538 **      override results with any local data;
 539 **
 540 */
 541
 542 static int translucent_search(Operation *op, SlapReply *rs) {
 543         Operation nop = *op;
 544
 545         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 546         slap_callback cb = { NULL, NULL, NULL, NULL };
 547         overlay_stack *ov = on->on_bi.bi_private;
 548         void *private = op->o_bd->be_private;
 549         int rc;
 550
 551         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 552                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 553         cb.sc_response = (slap_response *) translucent_search_cb;
 554         cb.sc_private = private;
 555
 556         cb.sc_next = nop.o_callback;
 557         nop.o_callback = &cb;
 558
 559         op->o_bd->be_private = ov->private;
 560         rc = ov->info->bi_op_search(&nop, rs);
 561         op->o_bd->be_private = private;
 562
 563         return(rs->sr_err);
 564 }
 565
 566
 567 /*
 568 ** translucent_bind()
 569 **      pass bind request to captive backend;
 570 **
 571 */
 572
 573 static int translucent_bind(Operation *op, SlapReply *rs) {
 574         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 575         overlay_stack *ov = on->on_bi.bi_private;
 576         void *private = op->o_bd->be_private;
 577         int rc = 0;
 578
 579         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 580                 op->o_req_dn.bv_val, op->orb_method, 0);
 581
 582         op->o_bd->be_private = ov->private;
 583         rc = ov->info->bi_op_bind(op, rs);
 584         op->o_bd->be_private = private;
 585
 586         return(rc);
 587 }
 588
 589 /*
 590 ** translucent_connection_destroy()
 591 **      pass disconnect notification to captive backend;
 592 **
 593 */
 594
 595 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
 596         slap_overinst *on = (slap_overinst *) be->bd_info;
 597         overlay_stack *ov = on->on_bi.bi_private;
 598         void *private = be->be_private;
 599         int rc = 0;
 600
 601         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
 602
 603         be->be_private = ov->private;
 604         rc = ov->info->bi_connection_destroy(be, conn);
 605         be->be_private = private;
 606
 607         return(rc);
 608 }
 609
 610 /*
 611 ** translucent_db_config()
 612 **      pass config directives to captive backend;
 613 **      parse unrecognized directives ourselves;
 614 **
 615 */
 616
 617 static int translucent_db_config(
 618         BackendDB       *be,
 619         const char      *fname,
 620         int             lineno,
 621         int             argc,
 622         char            **argv
 623 )
 624 {
 625         slap_overinst *on = (slap_overinst *) be->bd_info;
 626         overlay_stack *ov = on->on_bi.bi_private;
 627         void *private = be->be_private;
 628         void *be_cf_ocs = be->be_cf_ocs;
 629         int rc;
 630
 631         /* "this should never happen" */
 632         if(!ov->info) {
 633                 fprintf(stderr, "fatal: captive backend not initialized");
 634                 return(1);
 635         }
 636
 637         be->be_private = ov->private;
 638         be->be_cf_ocs = ov->info->bi_cf_ocs;
 639         rc = ov->info->bi_db_config ? ov->info->bi_db_config(be, fname, lineno, argc, argv) : 0;
 640         be->be_private = private;
 641         be->be_cf_ocs = be_cf_ocs;
 642
 643         /* pass okay or error up, SLAP_CONF_UNKNOWN might be ours */
 644         if(rc == 0 || rc == 1) return(rc);
 645
 646         rc = 0;
 647         if(!strcasecmp(*argv, "translucent_strict")) {
 648                 ov->config->strict++;
 649         } else if(!strcasecmp(*argv, "translucent_no_add")) {
 650                 ov->config->no_add++;
 651         } else if(!strcasecmp(*argv, "translucent_no_glue")) {
 652                 ov->config->glue++;
 653         } else if(!strcasecmp(*argv, "translucent_debug")) {
 654                 if(argc == 1) {
 655                         ov->config->debug = 0xFFFF;
 656                         rc = 0;
 657                 } else if(argc == 2) {
 658                         if ( lutil_atoi( &ov->config->debug, argv[1]) != 0 ) {
 659                                 fprintf(stderr, "%s: line %d: unable to parse debug \"%s\"\n",
 660                                         fname, lineno, argv[1]);
 661                                 return 1;
 662                         }
 663                         rc = 0;
 664                 } else {
 665                         fprintf(stderr, "%s: line %d: too many arguments (%d) to debug\n",
 666                                 fname, lineno, argc);
 667                         rc = 1;
 668                 }
 669         } else {
 670                 fprintf(stderr, "%s: line %d: unknown keyword %s\n",
 671                         fname, lineno, *argv);
 672                 rc = SLAP_CONF_UNKNOWN;
 673         }
 674         return(rc);
 675 }
 676
 677 /*
 678 ** translucent_db_init()
 679 **      initialize the captive backend;
 680 **
 681 */
 682
 683 static int translucent_db_init(BackendDB *be) {
 684         slap_overinst *on = (slap_overinst *) be->bd_info;
 685         void *private = be->be_private;
 686         overlay_stack *ov;
 687         int rc;
 688
 689         Debug(LDAP_DEBUG_TRACE, "==> translucent_init\n", 0, 0, 0);
 690
 691         ov = ch_calloc(1, sizeof(overlay_stack));
 692         ov->config = ch_calloc(1, sizeof(translucent_configuration));
 693         ov->info = backend_info("ldap");
 694
 695         if(!ov->info) {
 696                 Debug(LDAP_DEBUG_ANY, "translucent: backend_info failed!\n", 0, 0, 0);
 697                 return(1);
 698         }
 699
 700         /* forcibly disable schema checking on the local backend */
 701         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 702
 703         be->be_private = NULL;
 704         rc = ov->info->bi_db_init ? ov->info->bi_db_init(be) : 0;
 705
 706         if(rc) Debug(LDAP_DEBUG_TRACE,
 707                 "translucent: bi_db_init() returned error %d\n", rc, 0, 0);
 708
 709         ov->private = be->be_private;
 710         be->be_private = private;
 711         on->on_bi.bi_private = ov;
 712         return(rc);
 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) {
 722         slap_overinst *on = (slap_overinst *) be->bd_info;
 723         overlay_stack *ov = on->on_bi.bi_private;
 724         void *private = be->be_private;
 725         int rc;
 726
 727         /* "should never happen" */
 728         if(!ov->info) {
 729                 Debug(LDAP_DEBUG_ANY, "translucent_open() called with bad ov->info\n", 0, 0, 0);
 730                 return(LDAP_OTHER);
 731         }
 732
 733         Debug(LDAP_DEBUG_TRACE, "translucent_open\n", 0, 0, 0);
 734
 735         be->be_private = ov->private;
 736         rc = ov->info->bi_db_open ? ov->info->bi_db_open(be) : 0;
 737         be->be_private = private;
 738
 739         if(rc) Debug(LDAP_DEBUG_TRACE,
 740                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 741
 742         return(rc);
 743 }
 744
 745 /*
 746 ** translucent_db_close()
 747 **      if the captive backend has a close() method, call it;
 748 **      free any config data;
 749 **
 750 */
 751
 752 static int translucent_db_close(BackendDB *be) {
 753         slap_overinst *on = (slap_overinst *) be->bd_info;
 754         overlay_stack *ov = on->on_bi.bi_private;
 755         int rc = 0;
 756
 757         if ( ov ) {
 758                 void *private = be->be_private;
 759
 760                 be->be_private = ov->private;
 761                 rc = (ov->info && ov->info->bi_db_close) ? ov->info->bi_db_close(be) : 0;
 762                 be->be_private = private;
 763                 if(ov->config) ch_free(ov->config);
 764                 ov->config = NULL;
 765         }
 766
 767         return(rc);
 768 }
 769
 770 /*
 771 ** translucent_db_destroy()
 772 **      if the captive backend has a db_destroy() method, call it
 773 **
 774 */
 775
 776 static int translucent_db_destroy(BackendDB *be) {
 777         slap_overinst *on = (slap_overinst *) be->bd_info;
 778         overlay_stack *ov = on->on_bi.bi_private;
 779         int rc = 0;
 780
 781         if ( ov ) {
 782                 void *private = be->be_private;
 783
 784                 be->be_private = ov->private;
 785                 rc = (ov->info && ov->info->bi_db_destroy) ? ov->info->bi_db_destroy(be) : 0;
 786                 be->be_private = private;
 787                 ch_free(ov);
 788                 on->on_bi.bi_private = NULL;
 789         }
 790
 791         return(rc);
 792 }
 793
 794 /*
 795 ** translucent_initialize()
 796 **      initialize the slap_overinst with our entry points;
 797 **
 798 */
 799
 800 int translucent_initialize() {
 801
 802         translucent.on_bi.bi_type       = "translucent";
 803         translucent.on_bi.bi_db_init    = translucent_db_init;
 804         translucent.on_bi.bi_db_config  = translucent_db_config;
 805         translucent.on_bi.bi_db_open    = translucent_db_open;
 806         translucent.on_bi.bi_db_close   = translucent_db_close;
 807         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
 808         translucent.on_bi.bi_op_bind    = translucent_bind;
 809         translucent.on_bi.bi_op_add     = translucent_add;
 810         translucent.on_bi.bi_op_modify  = translucent_modify;
 811         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 812         translucent.on_bi.bi_op_delete  = translucent_delete;
 813         translucent.on_bi.bi_op_search  = translucent_search;
 814         translucent.on_bi.bi_op_compare = translucent_compare;
 815         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
 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 */
 827