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