git.sur5r.net Git - openldap/blob - servers/slapd/overlays/translucent.c

   1 /* translucent.c - translucent proxy module */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004-2006 The OpenLDAP Foundation.
   6  * Portions Copyright 2005 Symas Corporation.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by Symas Corp. for inclusion in
  19  * OpenLDAP Software.  This work was sponsored by Hewlett-Packard.
  20  */
  21
  22 #include "portable.h"
  23
  24 #ifdef SLAPD_OVER_TRANSLUCENT
  25
  26 #include <stdio.h>
  27
  28 #include <ac/string.h>
  29 #include <ac/socket.h>
  30
  31 #include "slap.h"
  32 #include "lutil.h"
  33
  34 #include "config.h"
  35
  36 /* config block */
  37 typedef struct translucent_info {
  38         BackendDB db;                   /* captive backend */
  39         int strict;
  40         int no_glue;
  41 } translucent_info;
  42
  43 static ConfigLDAPadd translucent_ldadd;
  44 static ConfigCfAdd translucent_cfadd;
  45
  46 static ConfigTable translucentcfg[] = {
  47         { "translucent_strict", "on|off", 1, 2, 0,
  48           ARG_ON_OFF|ARG_OFFSET,
  49           (void *)offsetof(translucent_info, strict),
  50           "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
  51           "DESC 'Reveal attribute deletion constraint violations' "
  52           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  53         { "translucent_no_glue", "on|off", 1, 2, 0,
  54           ARG_ON_OFF|ARG_OFFSET,
  55           (void *)offsetof(translucent_info, no_glue),
  56           "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
  57           "DESC 'Disable automatic glue records for ADD and MODRDN' "
  58           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  59         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  60 };
  61
  62 static ConfigOCs translucentocs[] = {
  63         { "( OLcfgOvOc:14.1 "
  64           "NAME 'olcTranslucentConfig' "
  65           "DESC 'Translucent configuration' "
  66           "SUP olcOverlayConfig "
  67           "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue ) )",
  68           Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
  69         { "( OLcfgOvOc:14.2 "
  70           "NAME 'olcTranslucentDatabase' "
  71           "DESC 'Translucent target database configuration' "
  72           "AUXILIARY )", Cft_Misc, translucentcfg, translucent_ldadd },
  73         { NULL, 0, NULL }
  74 };
  75 /* for translucent_init() */
  76
  77 static int
  78 translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
  79 {
  80         slap_overinst *on;
  81         translucent_info *ov;
  82
  83         Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
  84
  85         if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
  86              cei->ce_bi->bi_cf_ocs != translucentocs )
  87                 return LDAP_CONSTRAINT_VIOLATION;
  88
  89         on = (slap_overinst *)cei->ce_bi;
  90         ov = on->on_bi.bi_private;
  91         ca->be = &ov->db;
  92         return LDAP_SUCCESS;
  93 }
  94
  95 static int
  96 translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
  97 {
  98         CfEntryInfo *cei = e->e_private;
  99         slap_overinst *on = (slap_overinst *)cei->ce_bi;
 100         translucent_info *ov = on->on_bi.bi_private;
 101         struct berval bv;
 102
 103         Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
 104
 105         /* FIXME: should not hardcode "olcDatabase" here */
 106         bv.bv_len = sprintf( ca->msg, "olcDatabase=%s",
 107                              ov->db.bd_info->bi_type );
 108         bv.bv_val = ca->msg;
 109         ca->be = &ov->db;
 110
 111         /* We can only create this entry if the database is table-driven
 112          */
 113         if ( ov->db.bd_info->bi_cf_ocs )
 114                 config_build_entry( op, rs, cei, ca, &bv,
 115                                     ov->db.bd_info->bi_cf_ocs,
 116                                     &translucentocs[1] );
 117
 118         return 0;
 119 }
 120
 121 static slap_overinst translucent;
 122
 123 /*
 124 ** glue_parent()
 125 **      call syncrepl_add_glue() with the parent suffix;
 126 **
 127 */
 128
 129 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 130
 131 void glue_parent(Operation *op) {
 132         Operation nop = *op;
 133         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 134         struct berval ndn = BER_BVNULL;
 135         Attribute *a;
 136         Entry *e;
 137         struct berval   pdn;
 138
 139         dnParent( &op->o_req_ndn, &pdn );
 140         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 141
 142         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 143
 144         e = ch_calloc(1, sizeof(Entry));
 145         e->e_id = NOID;
 146         ber_dupbv(&e->e_name, &ndn);
 147         ber_dupbv(&e->e_nname, &ndn);
 148
 149         a = ch_calloc(1, sizeof(Attribute));
 150         a->a_desc = slap_schema.si_ad_objectClass;
 151         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 152         ber_dupbv(&a->a_vals[0], &glue[0]);
 153         ber_dupbv(&a->a_vals[1], &glue[1]);
 154         ber_dupbv(&a->a_vals[2], &glue[2]);
 155         a->a_nvals = a->a_vals;
 156         a->a_next = e->e_attrs;
 157         e->e_attrs = a;
 158
 159         a = ch_calloc(1, sizeof(Attribute));
 160         a->a_desc = slap_schema.si_ad_structuralObjectClass;
 161         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 162         ber_dupbv(&a->a_vals[0], &glue[1]);
 163         ber_dupbv(&a->a_vals[1], &glue[2]);
 164         a->a_nvals = a->a_vals;
 165         a->a_next = e->e_attrs;
 166         e->e_attrs = a;
 167
 168         nop.o_req_dn = ndn;
 169         nop.o_req_ndn = ndn;
 170         nop.ora_e = e;
 171
 172         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 173         syncrepl_add_glue(&nop, e);
 174         nop.o_bd->bd_info = (BackendInfo *) on;
 175
 176         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 177
 178         return;
 179 }
 180
 181 /*
 182 ** dup_bervarray()
 183 **      copy a BerVarray;
 184 */
 185
 186 BerVarray dup_bervarray(BerVarray b) {
 187         int i, len;
 188         BerVarray nb;
 189         for(len = 0; b[len].bv_val; len++);
 190         nb = ch_malloc((len+1) * sizeof(BerValue));
 191         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 192         nb[len].bv_val = NULL;
 193         nb[len].bv_len = 0;
 194         return(nb);
 195 }
 196
 197 /*
 198 ** free_attr_chain()
 199 **      free only the Attribute*, not the contents;
 200 **
 201 */
 202 void free_attr_chain(Attribute *a) {
 203         Attribute *ax;
 204         for(; a; a = ax) {
 205                 ax = a->a_next;
 206                 ch_free(a);
 207         }
 208         return;
 209 }
 210
 211 /*
 212 ** translucent_add()
 213 **      if not bound as root, send ACCESS error;
 214 **      if glue, glue_parent();
 215 **      return CONTINUE;
 216 **
 217 */
 218
 219 static int translucent_add(Operation *op, SlapReply *rs) {
 220         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 221         translucent_info *ov = on->on_bi.bi_private;
 222         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 223                 op->o_req_dn.bv_val, 0, 0);
 224         if(!be_isroot(op)) {
 225                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 226                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 227                         "user modification of overlay database not permitted");
 228                 op->o_bd->bd_info = (BackendInfo *) on;
 229                 return(rs->sr_err);
 230         }
 231         if(!ov->no_glue) glue_parent(op);
 232         return(SLAP_CB_CONTINUE);
 233 }
 234
 235 /*
 236 ** translucent_modrdn()
 237 **      if not bound as root, send ACCESS error;
 238 **      if !glue, glue_parent();
 239 **      else return CONTINUE;
 240 **
 241 */
 242
 243 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 244         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 245         translucent_info *ov = on->on_bi.bi_private;
 246         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 247                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 248         if(!be_isroot(op)) {
 249                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 250                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 251                         "user modification of overlay database not permitted");
 252                 op->o_bd->bd_info = (BackendInfo *) on;
 253                 return(rs->sr_err);
 254         }
 255         if(!ov->no_glue) glue_parent(op);
 256         return(SLAP_CB_CONTINUE);
 257 }
 258
 259 /*
 260 ** translucent_delete()
 261 **      if not bound as root, send ACCESS error;
 262 **      else return CONTINUE;
 263 **
 264 */
 265
 266 static int translucent_delete(Operation *op, SlapReply *rs) {
 267         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 268         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 269                 op->o_req_dn.bv_val, 0, 0);
 270         if(!be_isroot(op)) {
 271                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 272                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 273                         "user modification of overlay database not permitted");
 274                 op->o_bd->bd_info = (BackendInfo *) on;
 275                 return(rs->sr_err);
 276         }
 277         return(SLAP_CB_CONTINUE);
 278 }
 279
 280 static int
 281 translucent_tag_cb( Operation *op, SlapReply *rs )
 282 {
 283         op->o_tag = LDAP_REQ_MODIFY;
 284         op->orm_modlist = op->o_callback->sc_private;
 285         rs->sr_tag = slap_req2res( op->o_tag );
 286
 287         return SLAP_CB_CONTINUE;
 288 }
 289
 290 /*
 291 ** translucent_modify()
 292 **      modify in local backend if exists in both;
 293 **      otherwise, add to local backend;
 294 **      fail if not defined in captive backend;
 295 **
 296 */
 297
 298 static int translucent_modify(Operation *op, SlapReply *rs) {
 299         SlapReply nrs = { REP_RESULT };
 300         Operation nop = *op;
 301
 302         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 303         translucent_info *ov = on->on_bi.bi_private;
 304         Entry ne, *e = NULL, *re = NULL;
 305         Attribute *a, *ax;
 306         Modifications *m, *mm;
 307         int del, rc, erc = 0;
 308         slap_callback cb = { 0 };
 309
 310         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 311                 op->o_req_dn.bv_val, 0, 0);
 312
 313 /*
 314 ** fetch entry from the captive backend;
 315 ** if it did not exist, fail;
 316 ** release it, if captive backend supports this;
 317 **
 318 */
 319
 320         nop.o_bd = &ov->db;
 321         rc = ov->db.bd_info->bi_entry_get_rw(&nop, &nop.o_req_ndn, NULL, NULL, 0, &re);
 322         if(rc != LDAP_SUCCESS || re == NULL ) {
 323                 send_ldap_error((&nop), rs, LDAP_NO_SUCH_OBJECT,
 324                         "attempt to modify nonexistent local record");
 325                 return(rs->sr_err);
 326         }
 327         nop = *op;
 328 /*
 329 ** fetch entry from local backend;
 330 ** if it exists:
 331 **      foreach Modification:
 332 **          if attr not present in local:
 333 **              if Mod == LDAP_MOD_DELETE:
 334 **                  if remote attr not present, return NO_SUCH;
 335 **                  if remote attr present, drop this Mod;
 336 **              else force this Mod to LDAP_MOD_ADD;
 337 **      return CONTINUE;
 338 **
 339 */
 340
 341         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 342         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 343         op->o_bd->bd_info = (BackendInfo *) on;
 344
 345         if(e && rc == LDAP_SUCCESS) {
 346                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 347                 for(m = op->orm_modlist; m; m = m->sml_next) {
 348                         for(a = e->e_attrs; a; a = a->a_next)
 349                                 if(a->a_desc == m->sml_desc) break;
 350                         if(a) continue;         /* found local attr */
 351                         if(m->sml_op == LDAP_MOD_DELETE) {
 352                                 for(a = re->e_attrs; a; a = a->a_next)
 353                                         if(a->a_desc == m->sml_desc) break;
 354                                 /* not found remote attr */
 355                                 if(!a) {
 356                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 357                                         goto release;
 358                                 }
 359                                 if(ov->strict) {
 360                                         erc = LDAP_CONSTRAINT_VIOLATION;
 361                                         goto release;
 362                                 }
 363                                 Debug(LDAP_DEBUG_TRACE,
 364                                         "=> translucent_modify: silently dropping delete: %s\n",
 365                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 366                                 for(mm = op->orm_modlist; mm->sml_next != m; mm = mm->sml_next);
 367                                 mm->sml_next = m->sml_next;
 368                                 mm = m;
 369                                 m = m->sml_next;
 370                                 mm->sml_next = NULL;            /* hack */
 371                                 slap_mods_free(mm, 1);
 372                                 if(m) continue;
 373                         }
 374                         m->sml_op = LDAP_MOD_ADD;
 375                 }
 376                 erc = SLAP_CB_CONTINUE;
 377 release:
 378                 if(re) {
 379                         if(ov->db.bd_info->bi_entry_release_rw)
 380                                 ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 381                         else
 382                                 entry_free(re);
 383                 }
 384                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 385                 be_entry_release_r(op, e);
 386                 op->o_bd->bd_info = (BackendInfo *) on;
 387                 if(erc == SLAP_CB_CONTINUE) {
 388                         return(erc);
 389                 } else if(erc) {
 390                         send_ldap_error(op, rs, erc,
 391                                 "attempt to delete nonexistent attribute");
 392                         return(erc);
 393                 }
 394         }
 395
 396         /* don't leak remote entry copy */
 397         if(re) {
 398                 if(ov->db.bd_info->bi_entry_release_rw)
 399                         ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 400                 else
 401                         entry_free(re);
 402         }
 403 /*
 404 ** foreach Modification:
 405 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 406 ** if no Modifications were suitable:
 407 **      if strict, throw CONSTRAINT_VIOLATION;
 408 **      else, return early SUCCESS;
 409 ** fabricate Entry with new Attribute chain;
 410 ** glue_parent() for this Entry;
 411 ** call bi_op_add() in local backend;
 412 **
 413 */
 414
 415         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 416         a = NULL;
 417         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 418                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 419                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 420                         Debug(LDAP_DEBUG_ANY,
 421                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 422                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 423                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 424                         continue;
 425                 }
 426                 a = ch_calloc(1, sizeof(Attribute));
 427                 a->a_desc  = m->sml_desc;
 428                 a->a_vals  = m->sml_values;
 429                 a->a_nvals = m->sml_nvalues;
 430                 a->a_next  = ax;
 431                 ax = a;
 432         }
 433
 434         if(del && ov->strict) {
 435                 free_attr_chain(a);
 436                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 437                         "attempt to delete attributes from local database");
 438                 return(rs->sr_err);
 439         }
 440
 441         if(!ax) {
 442                 if(ov->strict) {
 443                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 444                                 "modification contained other than ADD or REPLACE");
 445                         return(rs->sr_err);
 446                 }
 447                 /* rs->sr_text = "no valid modification found"; */
 448                 rs->sr_err = LDAP_SUCCESS;
 449                 send_ldap_result(op, rs);
 450                 return(rs->sr_err);
 451         }
 452
 453         ne.e_id         = NOID;
 454         ne.e_name       = op->o_req_dn;
 455         ne.e_nname      = op->o_req_ndn;
 456         ne.e_attrs      = a;
 457         ne.e_ocflags    = 0;
 458         ne.e_bv.bv_len  = 0;
 459         ne.e_bv.bv_val  = NULL;
 460         ne.e_private    = NULL;
 461
 462         nop.o_tag       = LDAP_REQ_ADD;
 463         nop.oq_add.rs_e = &ne;
 464
 465         glue_parent(&nop);
 466
 467         cb.sc_response = translucent_tag_cb;
 468         cb.sc_private = op->orm_modlist;
 469         cb.sc_next = nop.o_callback;
 470         nop.o_callback = &cb;
 471         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 472         free_attr_chain(a);
 473
 474         return(rc);
 475 }
 476
 477 static int translucent_compare(Operation *op, SlapReply *rs) {
 478         Operation nop = *op;
 479         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 480         translucent_info *ov = on->on_bi.bi_private;
 481         AttributeAssertion *ava = op->orc_ava;
 482         Entry *e;
 483         int rc;
 484
 485         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 486                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 487
 488 /*
 489 ** if the local backend has an entry for this attribute:
 490 **      CONTINUE and let it do the compare;
 491 **
 492 */
 493         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 494         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 495         if(e && rc == LDAP_SUCCESS) {
 496                 be_entry_release_r(op, e);
 497                 op->o_bd->bd_info = (BackendInfo *) on;
 498                 return(SLAP_CB_CONTINUE);
 499         }
 500         op->o_bd->bd_info = (BackendInfo *) on;
 501
 502 /*
 503 ** call compare() in the captive backend;
 504 ** return the result;
 505 **
 506 */
 507         nop.o_bd = &ov->db;
 508         nop.o_callback = NULL;
 509         rc = ov->db.bd_info->bi_op_compare(&nop, rs);
 510
 511         return(rc);
 512 }
 513
 514 /*
 515 ** translucent_search_cb()
 516 **      merge local data with the search result
 517 **
 518 */
 519
 520 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 521         slap_overinst *on;
 522         Entry *e, *re = NULL;
 523         Attribute *a, *ax, *an, *as = NULL;
 524         Operation * original_op, local_op;
 525         int rc;
 526
 527         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 528                 return(SLAP_CB_CONTINUE);
 529
 530         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 531                 rs->sr_entry->e_name.bv_val, 0, 0);
 532
 533         original_op = op->o_callback->sc_private;
 534         on = (slap_overinst *) original_op->o_bd->bd_info;
 535         local_op = *original_op;
 536
 537         local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 538         rc = be_entry_get_rw(&local_op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 539         local_op.o_bd->bd_info = (BackendInfo *) on;
 540
 541 /*
 542 ** if we got an entry from local backend:
 543 **      make a copy of this search result;
 544 **      foreach local attr:
 545 **              foreach search result attr:
 546 **                      if match, result attr with local attr;
 547 **                      if new local, add to list;
 548 **      append new local attrs to search result;
 549 **
 550 */
 551
 552         if(e && rc == LDAP_SUCCESS) {
 553                 re = entry_dup(rs->sr_entry);
 554                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 555 #if 0
 556                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 557 #endif
 558                         for(a = re->e_attrs; a; a = a->a_next) {
 559                                 if(a->a_desc == ax->a_desc) {
 560                                         if(a->a_vals != a->a_nvals)
 561                                                 ber_bvarray_free(a->a_nvals);
 562                                         ber_bvarray_free(a->a_vals);
 563                                         a->a_vals = dup_bervarray(ax->a_vals);
 564                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 565                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 566                                         break;
 567                                 }
 568                         }
 569                         if(a) continue;
 570                         an = attr_dup(ax);
 571                         an->a_next = as;
 572                         as = an;
 573                 }
 574                 local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 575                 be_entry_release_r(&local_op, e);
 576                 local_op.o_bd->bd_info = (BackendInfo *) on;
 577
 578                 /* literally append, so locals are always last */
 579                 if(as) {
 580                         if(re->e_attrs) {
 581                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 582                                 ax->a_next = as;
 583                         } else {
 584                                 re->e_attrs = as;
 585                         }
 586                 }
 587                 rs->sr_entry = re;
 588                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 589         }
 590
 591         return(SLAP_CB_CONTINUE);
 592 }
 593
 594 /*
 595 ** translucent_search()
 596 **      search via captive backend;
 597 **      override results with any local data;
 598 **
 599 */
 600
 601 static int translucent_search(Operation *op, SlapReply *rs) {
 602         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 603         Operation nop = *op;
 604         translucent_info *ov = on->on_bi.bi_private;
 605         slap_callback cb = { NULL, NULL, NULL, NULL };
 606
 607         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 608                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 609
 610         cb.sc_response = (slap_response *) translucent_search_cb;
 611         cb.sc_private = op;
 612         cb.sc_next = nop.o_callback;
 613
 614         nop.o_callback = &cb;
 615         nop.o_bd = &ov->db;
 616         return (ov->db.bd_info->bi_op_search(&nop, rs));
 617 }
 618
 619
 620 /*
 621 ** translucent_bind()
 622 **      pass bind request to captive backend;
 623 **
 624 */
 625
 626 static int translucent_bind(Operation *op, SlapReply *rs) {
 627         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 628         Operation nop = *op;
 629         translucent_info *ov = on->on_bi.bi_private;
 630
 631         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 632                 op->o_req_dn.bv_val, op->orb_method, 0);
 633
 634         nop.o_bd = &ov->db;
 635         return (ov->db.bd_info->bi_op_bind(&nop, rs));
 636 }
 637
 638 /*
 639 ** translucent_connection_destroy()
 640 **      pass disconnect notification to captive backend;
 641 **
 642 */
 643
 644 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
 645         slap_overinst *on = (slap_overinst *) be->bd_info;
 646         translucent_info *ov = on->on_bi.bi_private;
 647         int rc = 0;
 648
 649         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
 650
 651         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
 652
 653         return(rc);
 654 }
 655
 656 /*
 657 ** translucent_db_config()
 658 **      pass config directives to captive backend;
 659 **      parse unrecognized directives ourselves;
 660 **
 661 */
 662
 663 static int translucent_db_config(
 664         BackendDB       *be,
 665         const char      *fname,
 666         int             lineno,
 667         int             argc,
 668         char            **argv
 669 )
 670 {
 671         slap_overinst *on = (slap_overinst *) be->bd_info;
 672         translucent_info *ov = on->on_bi.bi_private;
 673
 674         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
 675               argc ? argv[0] : "", 0, 0);
 676
 677         /* Something for the captive database? */
 678         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
 679                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
 680                         argc, argv );
 681         return SLAP_CONF_UNKNOWN;
 682 }
 683
 684 /*
 685 ** translucent_db_init()
 686 **      initialize the captive backend;
 687 **
 688 */
 689
 690 static int translucent_db_init(BackendDB *be) {
 691         slap_overinst *on = (slap_overinst *) be->bd_info;
 692         translucent_info *ov;
 693         int rc;
 694
 695         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
 696
 697         ov = ch_calloc(1, sizeof(translucent_info));
 698         on->on_bi.bi_private = ov;
 699         ov->db = *be;
 700         ov->db.be_private = NULL;
 701         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
 702
 703         if ( !backend_db_init( "ldap", &ov->db )) {
 704                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
 705                 return 1;
 706         }
 707         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 708         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
 709
 710         return 0;
 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         translucent_info *ov = on->on_bi.bi_private;
 722         int rc;
 723
 724         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
 725
 726         /* need to inherit something from the original database... */
 727         ov->db.be_def_limit = be->be_def_limit;
 728         ov->db.be_limits = be->be_limits;
 729         ov->db.be_acl = be->be_acl;
 730         ov->db.be_dfltaccess = be->be_dfltaccess;
 731
 732         rc = backend_startup_one( &ov->db );
 733
 734         if(rc) Debug(LDAP_DEBUG_TRACE,
 735                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 736
 737         return(rc);
 738 }
 739
 740 /*
 741 ** translucent_db_close()
 742 **      if the captive backend has a close() method, call it;
 743 **      free any config data;
 744 **
 745 */
 746
 747 static int translucent_db_close(BackendDB *be) {
 748         slap_overinst *on = (slap_overinst *) be->bd_info;
 749         translucent_info *ov = on->on_bi.bi_private;
 750         int rc = 0;
 751
 752         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
 753
 754         if ( ov ) {
 755                 rc = (ov->db.bd_info && ov->db.bd_info->bi_db_close) ? ov->db.bd_info->bi_db_close(&ov->db) : 0;
 756         }
 757
 758         return(rc);
 759 }
 760
 761 /*
 762 ** translucent_db_destroy()
 763 **      if the captive backend has a db_destroy() method, call it
 764 **
 765 */
 766
 767 static int translucent_db_destroy(BackendDB *be) {
 768         slap_overinst *on = (slap_overinst *) be->bd_info;
 769         translucent_info *ov = on->on_bi.bi_private;
 770         int rc = 0;
 771
 772         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
 773
 774         if ( ov ) {
 775                 rc = (ov->db.bd_info && ov->db.bd_info->bi_db_destroy) ? ov->db.bd_info->bi_db_destroy(&ov->db) : 0;
 776                 ch_free(ov);
 777                 on->on_bi.bi_private = NULL;
 778         }
 779
 780         return(rc);
 781 }
 782
 783 /*
 784 ** translucent_initialize()
 785 **      initialize the slap_overinst with our entry points;
 786 **
 787 */
 788
 789 int translucent_initialize() {
 790
 791         int rc;
 792
 793         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
 794
 795         translucent.on_bi.bi_type       = "translucent";
 796         translucent.on_bi.bi_db_init    = translucent_db_init;
 797         translucent.on_bi.bi_db_config  = translucent_db_config;
 798         translucent.on_bi.bi_db_open    = translucent_db_open;
 799         translucent.on_bi.bi_db_close   = translucent_db_close;
 800         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
 801         translucent.on_bi.bi_op_bind    = translucent_bind;
 802         translucent.on_bi.bi_op_add     = translucent_add;
 803         translucent.on_bi.bi_op_modify  = translucent_modify;
 804         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 805         translucent.on_bi.bi_op_delete  = translucent_delete;
 806         translucent.on_bi.bi_op_search  = translucent_search;
 807         translucent.on_bi.bi_op_compare = translucent_compare;
 808         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
 809
 810         translucent.on_bi.bi_cf_ocs = translucentocs;
 811         rc = config_register_schema ( translucentcfg, translucentocs );
 812         if ( rc ) return rc;
 813
 814         return(overlay_register(&translucent));
 815 }
 816
 817 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
 818 int init_module(int argc, char *argv[]) {
 819         return translucent_initialize();
 820 }
 821 #endif
 822
 823 #endif /* SLAPD_OVER_TRANSLUCENT */