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 /* 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(m = op->orm_modlist; m; m = m->sml_next) {
 279                         for(a = e->e_attrs; a; a = a->a_next)
 280                                 if(a->a_desc == m->sml_desc) break;
 281                         if(a) continue;         /* found local attr */
 282                         if(m->sml_op == LDAP_MOD_DELETE) {
 283                                 for(a = re->e_attrs; a; a = a->a_next)
 284                                         if(a->a_desc == m->sml_desc) break;
 285                                 /* not found remote attr */
 286                                 if(!a) {
 287                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 288                                         goto release;
 289                                 }
 290                                 if(ov->config->strict) {
 291                                         erc = LDAP_CONSTRAINT_VIOLATION;
 292                                         goto release;
 293                                 }
 294                                 Debug(LDAP_DEBUG_TRACE,
 295                                         "=> translucent_modify: silently dropping delete: %s\n",
 296                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 297                                 for(mm = op->orm_modlist; mm->sml_next != m; mm = mm->sml_next);
 298                                 mm->sml_next = m->sml_next;
 299                                 mm = m;
 300                                 m = m->sml_next;
 301                                 mm->sml_next = NULL;            /* hack */
 302                                 slap_mods_free(mm, 1);
 303                                 if(m) continue;
 304                         }
 305                         m->sml_op = LDAP_MOD_ADD;
 306                 }
 307                 erc = SLAP_CB_CONTINUE;
 308 release:
 309                 if(re) {
 310                         op->o_bd->be_private = ov->private;
 311                         if(ov->info->bi_entry_release_rw)
 312                                 ov->info->bi_entry_release_rw(op, re, 0);
 313                         else
 314                                 entry_free(re);
 315                         op->o_bd->be_private = private;
 316                 }
 317                 be_entry_release_r(op, e);
 318                 if(erc == SLAP_CB_CONTINUE) {
 319                         op->o_bd->bd_info = (BackendInfo *) on;
 320                         return(erc);
 321                 } else if(erc) {
 322                         send_ldap_error(op, rs, erc,
 323                                 "attempt to delete nonexistent attribute");
 324                         return(erc);
 325                 }
 326         }
 327
 328         /* don't leak remote entry copy */
 329         if(re) {
 330                 op->o_bd->be_private = ov->private;
 331                 if(ov->info->bi_entry_release_rw)
 332                         ov->info->bi_entry_release_rw(op, re, 0);
 333                 else
 334                         entry_free(re);
 335                 op->o_bd->be_private = private;
 336         }
 337 /*
 338 ** foreach Modification:
 339 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 340 ** if no Modifications were suitable:
 341 **      if config.strict, throw CONSTRAINT_VIOLATION;
 342 **      else, return early SUCCESS;
 343 ** fabricate Entry with new Attribute chain;
 344 ** glue_parent() for this Entry;
 345 ** call bi_op_add() in local backend;
 346 **
 347 */
 348
 349         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 350         a = NULL;
 351         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 352                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 353                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 354                         Debug(LDAP_DEBUG_ANY,
 355                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 356                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 357                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 358                         continue;
 359                 }
 360                 a = ch_calloc(1, sizeof(Attribute));
 361                 a->a_desc  = m->sml_desc;
 362                 a->a_vals  = m->sml_values;
 363                 a->a_nvals = m->sml_nvalues;
 364                 a->a_next  = ax;
 365                 ax = a;
 366         }
 367
 368         if(del && ov->config->strict) {
 369                 free_attr_chain(a);
 370                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 371                         "attempt to delete attributes from local database");
 372                 return(rs->sr_err);
 373         }
 374
 375         if(!ax) {
 376                 if(ov->config->strict) {
 377                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 378                                 "modification contained other than ADD or REPLACE");
 379                         return(rs->sr_err);
 380                 }
 381                 op->o_bd->bd_info = (BackendInfo *) on;
 382                 /* rs->sr_text = "no valid modification found"; */
 383                 rs->sr_err = LDAP_SUCCESS;
 384                 send_ldap_result(op, rs);
 385                 return(rs->sr_err);
 386         }
 387
 388         ne.e_id         = NOID;
 389         ne.e_name       = op->o_req_dn;
 390         ne.e_nname      = op->o_req_ndn;
 391         ne.e_attrs      = a;
 392         ne.e_ocflags    = 0;
 393         ne.e_bv.bv_len  = 0;
 394         ne.e_bv.bv_val  = NULL;
 395         ne.e_private    = NULL;
 396
 397         nop.o_tag       = LDAP_REQ_ADD;
 398         nop.oq_add.rs_e = &ne;
 399
 400         op->o_bd->bd_info = (BackendInfo *) on;
 401         glue_parent(&nop);
 402
 403         cb.sc_response = translucent_tag_cb;
 404         cb.sc_private = op->orm_modlist;
 405         cb.sc_next = nop.o_callback;
 406         nop.o_callback = &cb;
 407         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 408         free_attr_chain(a);
 409
 410         return(rc);
 411 }
 412
 413 static int translucent_compare(Operation *op, SlapReply *rs) {
 414         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 415         overlay_stack *ov = on->on_bi.bi_private;
 416         void *private = op->o_bd->be_private;
 417
 418         AttributeAssertion *ava = op->orc_ava;
 419         Entry *e;
 420         int rc;
 421
 422         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 423                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 424
 425 /*
 426 ** if the local backend has an entry for this attribute:
 427 **      CONTINUE and let it do the compare;
 428 **
 429 */
 430
 431         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 432         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 433         if(e && rc == LDAP_SUCCESS) {
 434                 be_entry_release_r(op, e);
 435                 op->o_bd->bd_info = (BackendInfo *) on;
 436                 return(SLAP_CB_CONTINUE);
 437         }
 438
 439 /*
 440 ** call compare() in the captive backend;
 441 ** return the result;
 442 **
 443 */
 444
 445         op->o_bd->be_private = ov->private;
 446         rc = ov->info->bi_op_compare(op, rs);
 447         op->o_bd->be_private = private;
 448         op->o_bd->bd_info = (BackendInfo *) on;
 449         return(rc);
 450 }
 451
 452 /*
 453 ** translucent_search_cb()
 454 **      merge local data with the search result
 455 **
 456 */
 457
 458 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 459         slap_overinst *on;
 460         Entry *e, *re = NULL;
 461         Attribute *a, *ax, *an, *as = NULL;
 462         void *private;
 463         int rc;
 464
 465         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 466                 return(SLAP_CB_CONTINUE);
 467
 468         Debug(LDAP_DEBUG_TRACE, "==> tranclucent_search_cb: %s\n",
 469                 rs->sr_entry->e_name.bv_val, 0, 0);
 470
 471         on = (slap_overinst *) op->o_bd->bd_info;
 472         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 473
 474         private = op->o_bd->be_private;
 475         op->o_bd->be_private = op->o_callback->sc_private;
 476
 477         rc = be_entry_get_rw(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 478
 479 /*
 480 ** if we got an entry from local backend:
 481 **      make a copy of this search result;
 482 **      foreach local attr:
 483 **              foreach search result attr:
 484 **                      if match, result attr with local attr;
 485 **                      if new local, add to list;
 486 **      append new local attrs to search result;
 487 **
 488 */
 489
 490         if(e && rc == LDAP_SUCCESS) {
 491                 re = entry_dup(rs->sr_entry);
 492                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 493 #if 0
 494                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 495 #endif
 496                         for(a = re->e_attrs; a; a = a->a_next) {
 497                                 if(a->a_desc == ax->a_desc) {
 498                                         if(a->a_vals != a->a_nvals)
 499                                                 ber_bvarray_free(a->a_nvals);
 500                                         ber_bvarray_free(a->a_vals);
 501                                         a->a_vals = dup_bervarray(ax->a_vals);
 502                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 503                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 504                                         break;
 505                                 }
 506                         }
 507                         if(a) continue;
 508                         an = attr_dup(ax);
 509                         an->a_next = as;
 510                         as = an;
 511                 }
 512                 be_entry_release_r(op, e);
 513
 514                 /* literally append, so locals are always last */
 515                 if(as) {
 516                         if(re->e_attrs) {
 517                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 518                                 ax->a_next = as;
 519                         } else {
 520                                 re->e_attrs = as;
 521                         }
 522                 }
 523                 rs->sr_entry = re;
 524                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 525         }
 526
 527         op->o_bd->be_private = private;
 528         op->o_bd->bd_info = (BackendInfo *) on;
 529
 530         return(SLAP_CB_CONTINUE);
 531 }
 532
 533 /*
 534 ** translucent_search()
 535 **      search via captive backend;
 536 **      override results with any local data;
 537 **
 538 */
 539
 540 static int translucent_search(Operation *op, SlapReply *rs) {
 541         Operation nop = *op;
 542
 543         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 544         slap_callback cb = { NULL, NULL, NULL, NULL };
 545         overlay_stack *ov = on->on_bi.bi_private;
 546         void *private = op->o_bd->be_private;
 547         int rc;
 548
 549         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 550                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 551         cb.sc_response = (slap_response *) translucent_search_cb;
 552         cb.sc_private = private;
 553
 554         cb.sc_next = nop.o_callback;
 555         nop.o_callback = &cb;
 556
 557         op->o_bd->be_private = ov->private;
 558         rc = ov->info->bi_op_search(&nop, rs);
 559         op->o_bd->be_private = private;
 560
 561         return(rs->sr_err);
 562 }
 563
 564
 565 /*
 566 ** translucent_bind()
 567 **      pass bind request to captive backend;
 568 **
 569 */
 570
 571 static int translucent_bind(Operation *op, SlapReply *rs) {
 572         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 573         overlay_stack *ov = on->on_bi.bi_private;
 574         void *private = op->o_bd->be_private;
 575         int rc = 0;
 576
 577         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 578                 op->o_req_dn.bv_val, op->orb_method, 0);
 579
 580         op->o_bd->be_private = ov->private;
 581         rc = ov->info->bi_op_bind(op, rs);
 582         op->o_bd->be_private = private;
 583
 584         return(rc);
 585 }
 586
 587 /*
 588 ** translucent_connection_destroy()
 589 **      pass disconnect notification to captive backend;
 590 **
 591 */
 592
 593 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
 594         slap_overinst *on = (slap_overinst *) be->bd_info;
 595         overlay_stack *ov = on->on_bi.bi_private;
 596         void *private = be->be_private;
 597         int rc = 0;
 598
 599         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
 600
 601         be->be_private = ov->private;
 602         rc = ov->info->bi_connection_destroy(be, conn);
 603         be->be_private = private;
 604
 605         return(rc);
 606 }
 607
 608 /*
 609 ** translucent_db_config()
 610 **      pass config directives to captive backend;
 611 **      parse unrecognized directives ourselves;
 612 **
 613 */
 614
 615 static int translucent_db_config(
 616         BackendDB       *be,
 617         const char      *fname,
 618         int             lineno,
 619         int             argc,
 620         char            **argv
 621 )
 622 {
 623         slap_overinst *on = (slap_overinst *) be->bd_info;
 624         overlay_stack *ov = on->on_bi.bi_private;
 625         void *private = be->be_private;
 626         void *be_cf_ocs = be->be_cf_ocs;
 627         int rc;
 628
 629         /* "this should never happen" */
 630         if(!ov->info) {
 631                 fprintf(stderr, "fatal: captive backend not initialized");
 632                 return(1);
 633         }
 634
 635         be->be_private = ov->private;
 636         be->be_cf_ocs = ov->info->bi_cf_ocs;
 637         rc = ov->info->bi_db_config ? ov->info->bi_db_config(be, fname, lineno, argc, argv) : 0;
 638         be->be_private = private;
 639         be->be_cf_ocs = be_cf_ocs;
 640
 641         /* pass okay or error up, SLAP_CONF_UNKNOWN might be ours */
 642         if(rc == 0 || rc == 1) return(rc);
 643
 644         rc = 0;
 645         if(!strcasecmp(*argv, "translucent_strict")) {
 646                 ov->config->strict++;
 647         } else if(!strcasecmp(*argv, "translucent_no_add")) {
 648                 ov->config->no_add++;
 649         } else if(!strcasecmp(*argv, "translucent_no_glue")) {
 650                 ov->config->glue++;
 651         } else if(!strcasecmp(*argv, "translucent_debug")) {
 652                 if(argc == 1) {
 653                         ov->config->debug = 0xFFFF;
 654                         rc = 0;
 655                 } else if(argc == 2) {
 656                         if ( lutil_atoi( &ov->config->debug, argv[1]) != 0 ) {
 657                                 fprintf(stderr, "%s: line %d: unable to parse debug \"%s\"\n",
 658                                         fname, lineno, argv[1]);
 659                                 return 1;
 660                         }
 661                         rc = 0;
 662                 } else {
 663                         fprintf(stderr, "%s: line %d: too many arguments (%d) to debug\n",
 664                                 fname, lineno, argc);
 665                         rc = 1;
 666                 }
 667         } else {
 668                 fprintf(stderr, "%s: line %d: unknown keyword %s\n",
 669                         fname, lineno, *argv);
 670                 rc = SLAP_CONF_UNKNOWN;
 671         }
 672         return(rc);
 673 }
 674
 675 /*
 676 ** translucent_db_init()
 677 **      initialize the captive backend;
 678 **
 679 */
 680
 681 static int translucent_db_init(BackendDB *be) {
 682         slap_overinst *on = (slap_overinst *) be->bd_info;
 683         void *private = be->be_private;
 684         overlay_stack *ov;
 685         int rc;
 686
 687         Debug(LDAP_DEBUG_TRACE, "==> translucent_init\n", 0, 0, 0);
 688
 689         ov = ch_calloc(1, sizeof(overlay_stack));
 690         ov->config = ch_calloc(1, sizeof(translucent_configuration));
 691         ov->info = backend_info("ldap");
 692
 693         if(!ov->info) {
 694                 ch_free( ov );
 695                 Debug(LDAP_DEBUG_ANY, "translucent: backend_info failed!\n", 0, 0, 0);
 696                 return(1);
 697         }
 698
 699         /* forcibly disable schema checking on the local backend */
 700         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 701
 702         be->be_private = NULL;
 703         rc = ov->info->bi_db_init ? ov->info->bi_db_init(be) : 0;
 704
 705         if(rc) Debug(LDAP_DEBUG_TRACE,
 706                 "translucent: bi_db_init() returned error %d\n", rc, 0, 0);
 707
 708         ov->private = be->be_private;
 709         be->be_private = private;
 710         on->on_bi.bi_private = ov;
 711         return(rc);
 712 }
 713
 714 /*
 715 ** translucent_db_open()
 716 **      if the captive backend has an open() method, call it;
 717 **
 718 */
 719
 720 static int translucent_db_open(BackendDB *be) {
 721         slap_overinst *on = (slap_overinst *) be->bd_info;
 722         overlay_stack *ov = on->on_bi.bi_private;
 723         void *private = be->be_private;
 724         int rc;
 725
 726         /* "should never happen" */
 727         if(!ov->info) {
 728                 Debug(LDAP_DEBUG_ANY, "translucent_open() called with bad ov->info\n", 0, 0, 0);
 729                 return(LDAP_OTHER);
 730         }
 731
 732         Debug(LDAP_DEBUG_TRACE, "translucent_open\n", 0, 0, 0);
 733
 734         be->be_private = ov->private;
 735         rc = ov->info->bi_db_open ? ov->info->bi_db_open(be) : 0;
 736         be->be_private = private;
 737
 738         if(rc) Debug(LDAP_DEBUG_TRACE,
 739                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 740
 741         return(rc);
 742 }
 743
 744 /*
 745 ** translucent_db_close()
 746 **      if the captive backend has a close() method, call it;
 747 **      free any config data;
 748 **
 749 */
 750
 751 static int translucent_db_close(BackendDB *be) {
 752         slap_overinst *on = (slap_overinst *) be->bd_info;
 753         overlay_stack *ov = on->on_bi.bi_private;
 754         int rc = 0;
 755
 756         if ( ov ) {
 757                 void *private = be->be_private;
 758
 759                 be->be_private = ov->private;
 760                 rc = (ov->info && ov->info->bi_db_close) ? ov->info->bi_db_close(be) : 0;
 761                 be->be_private = private;
 762                 if(ov->config) ch_free(ov->config);
 763                 ov->config = NULL;
 764         }
 765
 766         return(rc);
 767 }
 768
 769 /*
 770 ** translucent_db_destroy()
 771 **      if the captive backend has a db_destroy() method, call it
 772 **
 773 */
 774
 775 static int translucent_db_destroy(BackendDB *be) {
 776         slap_overinst *on = (slap_overinst *) be->bd_info;
 777         overlay_stack *ov = on->on_bi.bi_private;
 778         int rc = 0;
 779
 780         if ( ov ) {
 781                 void *private = be->be_private;
 782
 783                 be->be_private = ov->private;
 784                 rc = (ov->info && ov->info->bi_db_destroy) ? ov->info->bi_db_destroy(be) : 0;
 785                 be->be_private = private;
 786                 ch_free(ov);
 787                 on->on_bi.bi_private = NULL;
 788         }
 789
 790         return(rc);
 791 }
 792
 793 /*
 794 ** translucent_initialize()
 795 **      initialize the slap_overinst with our entry points;
 796 **
 797 */
 798
 799 int translucent_initialize() {
 800
 801         translucent.on_bi.bi_type       = "translucent";
 802         translucent.on_bi.bi_db_init    = translucent_db_init;
 803         translucent.on_bi.bi_db_config  = translucent_db_config;
 804         translucent.on_bi.bi_db_open    = translucent_db_open;
 805         translucent.on_bi.bi_db_close   = translucent_db_close;
 806         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
 807         translucent.on_bi.bi_op_bind    = translucent_bind;
 808         translucent.on_bi.bi_op_add     = translucent_add;
 809         translucent.on_bi.bi_op_modify  = translucent_modify;
 810         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 811         translucent.on_bi.bi_op_delete  = translucent_delete;
 812         translucent.on_bi.bi_op_search  = translucent_search;
 813         translucent.on_bi.bi_op_compare = translucent_compare;
 814         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
 815
 816         return(overlay_register(&translucent));
 817 }
 818
 819 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
 820 int init_module(int argc, char *argv[]) {
 821         return translucent_initialize();
 822 }
 823 #endif
 824
 825 #endif /* SLAPD_OVER_TRANSLUCENT */
 826