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

   1 /* translucent.c - translucent proxy module */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004-2007 The OpenLDAP Foundation.
   6  * Portions Copyright 2005 Symas Corporation.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by Symas Corp. for inclusion in
  19  * OpenLDAP Software.  This work was sponsored by Hewlett-Packard.
  20  */
  21
  22 #include "portable.h"
  23
  24 #ifdef SLAPD_OVER_TRANSLUCENT
  25
  26 #include <stdio.h>
  27
  28 #include <ac/string.h>
  29 #include <ac/socket.h>
  30
  31 #include "slap.h"
  32 #include "lutil.h"
  33
  34 #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 = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
 107                 "olcDatabase=%s", ov->db.bd_info->bi_type );
 108         if ( bv.bv_len < 0 || bv.bv_len >= sizeof( ca->cr_msg ) ) {
 109                 return -1;
 110         }
 111         bv.bv_val = ca->cr_msg;
 112         ca->be = &ov->db;
 113
 114         /* We can only create this entry if the database is table-driven
 115          */
 116         if ( ov->db.bd_info->bi_cf_ocs )
 117                 config_build_entry( op, rs, cei, ca, &bv,
 118                                     ov->db.bd_info->bi_cf_ocs,
 119                                     &translucentocs[1] );
 120
 121         return 0;
 122 }
 123
 124 static slap_overinst translucent;
 125
 126 /*
 127 ** glue_parent()
 128 **      call syncrepl_add_glue() with the parent suffix;
 129 **
 130 */
 131
 132 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 133
 134 void glue_parent(Operation *op) {
 135         Operation nop = *op;
 136         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 137         struct berval ndn = BER_BVNULL;
 138         Attribute *a;
 139         Entry *e;
 140         struct berval   pdn;
 141
 142         dnParent( &op->o_req_ndn, &pdn );
 143         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 144
 145         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 146
 147         e = entry_alloc();
 148         e->e_id = NOID;
 149         ber_dupbv(&e->e_name, &ndn);
 150         ber_dupbv(&e->e_nname, &ndn);
 151
 152         a = attr_alloc( slap_schema.si_ad_objectClass );
 153         a->a_numvals = 2;
 154         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 155         ber_dupbv(&a->a_vals[0], &glue[0]);
 156         ber_dupbv(&a->a_vals[1], &glue[1]);
 157         ber_dupbv(&a->a_vals[2], &glue[2]);
 158         a->a_nvals = a->a_vals;
 159         a->a_next = e->e_attrs;
 160         e->e_attrs = a;
 161
 162         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 163         a->a_numvals = 1;
 164         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 165         ber_dupbv(&a->a_vals[0], &glue[1]);
 166         ber_dupbv(&a->a_vals[1], &glue[2]);
 167         a->a_nvals = a->a_vals;
 168         a->a_next = e->e_attrs;
 169         e->e_attrs = a;
 170
 171         nop.o_req_dn = ndn;
 172         nop.o_req_ndn = ndn;
 173         nop.ora_e = e;
 174
 175         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 176         syncrepl_add_glue(&nop, e);
 177         nop.o_bd->bd_info = (BackendInfo *) on;
 178
 179         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 180
 181         return;
 182 }
 183
 184 /*
 185 ** dup_bervarray()
 186 **      copy a BerVarray;
 187 */
 188
 189 BerVarray dup_bervarray(BerVarray b) {
 190         int i, len;
 191         BerVarray nb;
 192         for(len = 0; b[len].bv_val; len++);
 193         nb = ch_malloc((len+1) * sizeof(BerValue));
 194         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 195         nb[len].bv_val = NULL;
 196         nb[len].bv_len = 0;
 197         return(nb);
 198 }
 199
 200 /*
 201 ** free_attr_chain()
 202 **      free only the Attribute*, not the contents;
 203 **
 204 */
 205 void free_attr_chain(Attribute *b) {
 206         Attribute *a;
 207         for(a=b; a; a=a->a_next) {
 208                 a->a_vals = NULL;
 209                 a->a_nvals = NULL;
 210         }
 211         attrs_free( b );
 212         return;
 213 }
 214
 215 /*
 216 ** translucent_add()
 217 **      if not bound as root, send ACCESS error;
 218 **      if glue, glue_parent();
 219 **      return CONTINUE;
 220 **
 221 */
 222
 223 static int translucent_add(Operation *op, SlapReply *rs) {
 224         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 225         translucent_info *ov = on->on_bi.bi_private;
 226         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 227                 op->o_req_dn.bv_val, 0, 0);
 228         if(!be_isroot(op)) {
 229                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 230                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 231                         "user modification of overlay database not permitted");
 232                 op->o_bd->bd_info = (BackendInfo *) on;
 233                 return(rs->sr_err);
 234         }
 235         if(!ov->no_glue) glue_parent(op);
 236         return(SLAP_CB_CONTINUE);
 237 }
 238
 239 /*
 240 ** translucent_modrdn()
 241 **      if not bound as root, send ACCESS error;
 242 **      if !glue, glue_parent();
 243 **      else return CONTINUE;
 244 **
 245 */
 246
 247 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 248         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 249         translucent_info *ov = on->on_bi.bi_private;
 250         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 251                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 252         if(!be_isroot(op)) {
 253                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 254                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 255                         "user modification of overlay database not permitted");
 256                 op->o_bd->bd_info = (BackendInfo *) on;
 257                 return(rs->sr_err);
 258         }
 259         if(!ov->no_glue) glue_parent(op);
 260         return(SLAP_CB_CONTINUE);
 261 }
 262
 263 /*
 264 ** translucent_delete()
 265 **      if not bound as root, send ACCESS error;
 266 **      else return CONTINUE;
 267 **
 268 */
 269
 270 static int translucent_delete(Operation *op, SlapReply *rs) {
 271         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 272         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 273                 op->o_req_dn.bv_val, 0, 0);
 274         if(!be_isroot(op)) {
 275                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 276                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 277                         "user modification of overlay database not permitted");
 278                 op->o_bd->bd_info = (BackendInfo *) on;
 279                 return(rs->sr_err);
 280         }
 281         return(SLAP_CB_CONTINUE);
 282 }
 283
 284 static int
 285 translucent_tag_cb( Operation *op, SlapReply *rs )
 286 {
 287         op->o_tag = LDAP_REQ_MODIFY;
 288         op->orm_modlist = op->o_callback->sc_private;
 289         rs->sr_tag = slap_req2res( op->o_tag );
 290
 291         return SLAP_CB_CONTINUE;
 292 }
 293
 294 /*
 295 ** translucent_modify()
 296 **      modify in local backend if exists in both;
 297 **      otherwise, add to local backend;
 298 **      fail if not defined in captive backend;
 299 **
 300 */
 301
 302 static int translucent_modify(Operation *op, SlapReply *rs) {
 303         SlapReply nrs = { REP_RESULT };
 304         Operation nop = *op;
 305
 306         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 307         translucent_info *ov = on->on_bi.bi_private;
 308         Entry *e = NULL, *re = NULL;
 309         Attribute *a, *ax;
 310         Modifications *m, **mm;
 311         int del, rc, erc = 0;
 312         slap_callback cb = { 0 };
 313
 314         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 315                 op->o_req_dn.bv_val, 0, 0);
 316
 317 /*
 318 ** fetch entry from the captive backend;
 319 ** if it did not exist, fail;
 320 ** release it, if captive backend supports this;
 321 **
 322 */
 323
 324         nop.o_bd = &ov->db;
 325         rc = ov->db.bd_info->bi_entry_get_rw(&nop, &nop.o_req_ndn, NULL, NULL, 0, &re);
 326         if(rc != LDAP_SUCCESS || re == NULL ) {
 327                 send_ldap_error((&nop), rs, LDAP_NO_SUCH_OBJECT,
 328                         "attempt to modify nonexistent local record");
 329                 return(rs->sr_err);
 330         }
 331         nop = *op;
 332 /*
 333 ** fetch entry from local backend;
 334 ** if it exists:
 335 **      foreach Modification:
 336 **          if attr not present in local:
 337 **              if Mod == LDAP_MOD_DELETE:
 338 **                  if remote attr not present, return NO_SUCH;
 339 **                  if remote attr present, drop this Mod;
 340 **              else force this Mod to LDAP_MOD_ADD;
 341 **      return CONTINUE;
 342 **
 343 */
 344
 345         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 346         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 347         op->o_bd->bd_info = (BackendInfo *) on;
 348
 349         if(e && rc == LDAP_SUCCESS) {
 350                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 351                 for(mm = &op->orm_modlist; *mm; ) {
 352                         m = *mm;
 353                         for(a = e->e_attrs; a; a = a->a_next)
 354                                 if(a->a_desc == m->sml_desc) break;
 355                         if(a) {
 356                                 mm = &m->sml_next;
 357                                 continue;               /* found local attr */
 358                         }
 359                         if(m->sml_op == LDAP_MOD_DELETE) {
 360                                 for(a = re->e_attrs; a; a = a->a_next)
 361                                         if(a->a_desc == m->sml_desc) break;
 362                                 /* not found remote attr */
 363                                 if(!a) {
 364                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 365                                         goto release;
 366                                 }
 367                                 if(ov->strict) {
 368                                         erc = LDAP_CONSTRAINT_VIOLATION;
 369                                         goto release;
 370                                 }
 371                                 Debug(LDAP_DEBUG_TRACE,
 372                                         "=> translucent_modify: silently dropping delete: %s\n",
 373                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 374                                 *mm = m->sml_next;
 375                                 m->sml_next = NULL;
 376                                 slap_mods_free(m, 1);
 377                                 continue;
 378                         }
 379                         m->sml_op = LDAP_MOD_ADD;
 380                         mm = &m->sml_next;
 381                 }
 382                 erc = SLAP_CB_CONTINUE;
 383 release:
 384                 if(re) {
 385                         if(ov->db.bd_info->bi_entry_release_rw)
 386                                 ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 387                         else
 388                                 entry_free(re);
 389                 }
 390                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 391                 be_entry_release_r(op, e);
 392                 op->o_bd->bd_info = (BackendInfo *) on;
 393                 if(erc == SLAP_CB_CONTINUE) {
 394                         return(erc);
 395                 } else if(erc) {
 396                         send_ldap_error(op, rs, erc,
 397                                 "attempt to delete nonexistent attribute");
 398                         return(erc);
 399                 }
 400         }
 401
 402         /* don't leak remote entry copy */
 403         if(re) {
 404                 if(ov->db.bd_info->bi_entry_release_rw)
 405                         ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 406                 else
 407                         entry_free(re);
 408         }
 409 /*
 410 ** foreach Modification:
 411 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 412 ** if no Modifications were suitable:
 413 **      if strict, throw CONSTRAINT_VIOLATION;
 414 **      else, return early SUCCESS;
 415 ** fabricate Entry with new Attribute chain;
 416 ** glue_parent() for this Entry;
 417 ** call bi_op_add() in local backend;
 418 **
 419 */
 420
 421         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 422         a = NULL;
 423         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 424                 Attribute atmp;
 425                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 426                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 427                         Debug(LDAP_DEBUG_ANY,
 428                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 429                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 430                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 431                         continue;
 432                 }
 433                 atmp.a_desc = m->sml_desc;
 434                 atmp.a_vals = m->sml_values;
 435                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 436                 atmp.a_numvals = m->sml_numvals;
 437                 atmp.a_flags = 0;
 438                 a = attr_dup( &atmp );
 439                 a->a_next  = ax;
 440                 ax = a;
 441         }
 442
 443         if(del && ov->strict) {
 444                 attrs_free( a );
 445                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 446                         "attempt to delete attributes from local database");
 447                 return(rs->sr_err);
 448         }
 449
 450         if(!ax) {
 451                 if(ov->strict) {
 452                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 453                                 "modification contained other than ADD or REPLACE");
 454                         return(rs->sr_err);
 455                 }
 456                 /* rs->sr_text = "no valid modification found"; */
 457                 rs->sr_err = LDAP_SUCCESS;
 458                 send_ldap_result(op, rs);
 459                 return(rs->sr_err);
 460         }
 461
 462         e = entry_alloc();
 463         ber_dupbv( &e->e_name, &op->o_req_dn );
 464         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 465         e->e_attrs = a;
 466
 467         nop.o_tag       = LDAP_REQ_ADD;
 468         nop.oq_add.rs_e = e;
 469
 470         glue_parent(&nop);
 471
 472         cb.sc_response = translucent_tag_cb;
 473         cb.sc_private = op->orm_modlist;
 474         cb.sc_next = nop.o_callback;
 475         nop.o_callback = &cb;
 476         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 477         if ( nop.ora_e == e )
 478                 entry_free( e );
 479
 480         return(rc);
 481 }
 482
 483 static int translucent_compare(Operation *op, SlapReply *rs) {
 484         Operation nop = *op;
 485         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 486         translucent_info *ov = on->on_bi.bi_private;
 487         AttributeAssertion *ava = op->orc_ava;
 488         Entry *e;
 489         int rc;
 490
 491         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 492                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 493
 494 /*
 495 ** if the local backend has an entry for this attribute:
 496 **      CONTINUE and let it do the compare;
 497 **
 498 */
 499         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 500         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 501         if(e && rc == LDAP_SUCCESS) {
 502                 be_entry_release_r(op, e);
 503                 op->o_bd->bd_info = (BackendInfo *) on;
 504                 return(SLAP_CB_CONTINUE);
 505         }
 506         op->o_bd->bd_info = (BackendInfo *) on;
 507
 508 /*
 509 ** call compare() in the captive backend;
 510 ** return the result;
 511 **
 512 */
 513         nop.o_bd = &ov->db;
 514         nop.o_callback = NULL;
 515         rc = ov->db.bd_info->bi_op_compare(&nop, rs);
 516
 517         return(rc);
 518 }
 519
 520 /*
 521 ** translucent_search_cb()
 522 **      merge local data with the search result
 523 **
 524 */
 525
 526 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 527         slap_overinst *on;
 528         Entry *e, *re = NULL;
 529         Attribute *a, *ax, *an, *as = NULL;
 530         Operation * original_op, local_op;
 531         int rc;
 532
 533         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 534                 return(SLAP_CB_CONTINUE);
 535
 536         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 537                 rs->sr_entry->e_name.bv_val, 0, 0);
 538
 539         original_op = op->o_callback->sc_private;
 540         on = (slap_overinst *) original_op->o_bd->bd_info;
 541         local_op = *original_op;
 542
 543         local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 544         rc = be_entry_get_rw(&local_op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 545         local_op.o_bd->bd_info = (BackendInfo *) on;
 546
 547 /*
 548 ** if we got an entry from local backend:
 549 **      make a copy of this search result;
 550 **      foreach local attr:
 551 **              foreach search result attr:
 552 **                      if match, result attr with local attr;
 553 **                      if new local, add to list;
 554 **      append new local attrs to search result;
 555 **
 556 */
 557
 558         if(e && rc == LDAP_SUCCESS) {
 559                 re = entry_dup(rs->sr_entry);
 560                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 561 #if 0
 562                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 563 #endif
 564                         for(a = re->e_attrs; a; a = a->a_next) {
 565                                 if(a->a_desc == ax->a_desc) {
 566                                         if(a->a_vals != a->a_nvals)
 567                                                 ber_bvarray_free(a->a_nvals);
 568                                         ber_bvarray_free(a->a_vals);
 569                                         a->a_vals = dup_bervarray(ax->a_vals);
 570                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 571                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 572                                         break;
 573                                 }
 574                         }
 575                         if(a) continue;
 576                         an = attr_dup(ax);
 577                         an->a_next = as;
 578                         as = an;
 579                 }
 580                 local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 581                 be_entry_release_r(&local_op, e);
 582                 local_op.o_bd->bd_info = (BackendInfo *) on;
 583
 584                 /* literally append, so locals are always last */
 585                 if(as) {
 586                         if(re->e_attrs) {
 587                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 588                                 ax->a_next = as;
 589                         } else {
 590                                 re->e_attrs = as;
 591                         }
 592                 }
 593                 rs->sr_entry = re;
 594                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 595         }
 596
 597         return(SLAP_CB_CONTINUE);
 598 }
 599
 600 /*
 601 ** translucent_search()
 602 **      search via captive backend;
 603 **      override results with any local data;
 604 **
 605 */
 606
 607 static int translucent_search(Operation *op, SlapReply *rs) {
 608         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 609         Operation nop = *op;
 610         translucent_info *ov = on->on_bi.bi_private;
 611         slap_callback cb = { NULL, NULL, NULL, NULL };
 612
 613         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 614                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 615
 616         cb.sc_response = (slap_response *) translucent_search_cb;
 617         cb.sc_private = op;
 618         cb.sc_next = nop.o_callback;
 619
 620         nop.o_callback = &cb;
 621         nop.o_bd = &ov->db;
 622         return (ov->db.bd_info->bi_op_search(&nop, rs));
 623 }
 624
 625
 626 /*
 627 ** translucent_bind()
 628 **      pass bind request to captive backend;
 629 **
 630 */
 631
 632 static int translucent_bind(Operation *op, SlapReply *rs) {
 633         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 634         Operation nop = *op;
 635         translucent_info *ov = on->on_bi.bi_private;
 636
 637         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 638                 op->o_req_dn.bv_val, op->orb_method, 0);
 639
 640         nop.o_bd = &ov->db;
 641         return (ov->db.bd_info->bi_op_bind(&nop, rs));
 642 }
 643
 644 /*
 645 ** translucent_connection_destroy()
 646 **      pass disconnect notification to captive backend;
 647 **
 648 */
 649
 650 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
 651         slap_overinst *on = (slap_overinst *) be->bd_info;
 652         translucent_info *ov = on->on_bi.bi_private;
 653         int rc = 0;
 654
 655         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
 656
 657         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
 658
 659         return(rc);
 660 }
 661
 662 /*
 663 ** translucent_db_config()
 664 **      pass config directives to captive backend;
 665 **      parse unrecognized directives ourselves;
 666 **
 667 */
 668
 669 static int translucent_db_config(
 670         BackendDB       *be,
 671         const char      *fname,
 672         int             lineno,
 673         int             argc,
 674         char            **argv
 675 )
 676 {
 677         slap_overinst *on = (slap_overinst *) be->bd_info;
 678         translucent_info *ov = on->on_bi.bi_private;
 679
 680         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
 681               argc ? argv[0] : "", 0, 0);
 682
 683         /* Something for the captive database? */
 684         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
 685                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
 686                         argc, argv );
 687         return SLAP_CONF_UNKNOWN;
 688 }
 689
 690 /*
 691 ** translucent_db_init()
 692 **      initialize the captive backend;
 693 **
 694 */
 695
 696 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
 697         slap_overinst *on = (slap_overinst *) be->bd_info;
 698         translucent_info *ov;
 699
 700         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
 701
 702         ov = ch_calloc(1, sizeof(translucent_info));
 703         on->on_bi.bi_private = ov;
 704         ov->db = *be;
 705         ov->db.be_private = NULL;
 706         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
 707
 708         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
 709                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
 710                 return 1;
 711         }
 712         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 713         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
 714
 715         return 0;
 716 }
 717
 718 /*
 719 ** translucent_db_open()
 720 **      if the captive backend has an open() method, call it;
 721 **
 722 */
 723
 724 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
 725         slap_overinst *on = (slap_overinst *) be->bd_info;
 726         translucent_info *ov = on->on_bi.bi_private;
 727         int rc;
 728
 729         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
 730
 731         /* need to inherit something from the original database... */
 732         ov->db.be_def_limit = be->be_def_limit;
 733         ov->db.be_limits = be->be_limits;
 734         ov->db.be_acl = be->be_acl;
 735         ov->db.be_dfltaccess = be->be_dfltaccess;
 736
 737         rc = backend_startup_one( &ov->db, NULL );
 738
 739         if(rc) Debug(LDAP_DEBUG_TRACE,
 740                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 741
 742         return(rc);
 743 }
 744
 745 /*
 746 ** translucent_db_close()
 747 **      if the captive backend has a close() method, call it;
 748 **      free any config data;
 749 **
 750 */
 751
 752 static int
 753 translucent_db_close( BackendDB *be, ConfigReply *cr )
 754 {
 755         slap_overinst *on = (slap_overinst *) be->bd_info;
 756         translucent_info *ov = on->on_bi.bi_private;
 757         int rc = 0;
 758
 759         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
 760
 761         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
 762                 rc = ov->db.bd_info->bi_db_close(&ov->db, 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
 775 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
 776 {
 777         slap_overinst *on = (slap_overinst *) be->bd_info;
 778         translucent_info *ov = on->on_bi.bi_private;
 779         int rc = 0;
 780
 781         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
 782
 783         if ( ov ) {
 784                 if ( ov->db.be_private != NULL ) {
 785                         backend_stopdown_one( &ov->db );
 786                 }
 787
 788                 ch_free(ov);
 789                 on->on_bi.bi_private = NULL;
 790         }
 791
 792         return(rc);
 793 }
 794
 795 /*
 796 ** translucent_initialize()
 797 **      initialize the slap_overinst with our entry points;
 798 **
 799 */
 800
 801 int translucent_initialize() {
 802
 803         int rc;
 804
 805         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
 806
 807         translucent.on_bi.bi_type       = "translucent";
 808         translucent.on_bi.bi_db_init    = translucent_db_init;
 809         translucent.on_bi.bi_db_config  = translucent_db_config;
 810         translucent.on_bi.bi_db_open    = translucent_db_open;
 811         translucent.on_bi.bi_db_close   = translucent_db_close;
 812         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
 813         translucent.on_bi.bi_op_bind    = translucent_bind;
 814         translucent.on_bi.bi_op_add     = translucent_add;
 815         translucent.on_bi.bi_op_modify  = translucent_modify;
 816         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 817         translucent.on_bi.bi_op_delete  = translucent_delete;
 818         translucent.on_bi.bi_op_search  = translucent_search;
 819         translucent.on_bi.bi_op_compare = translucent_compare;
 820         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
 821
 822         translucent.on_bi.bi_cf_ocs = translucentocs;
 823         rc = config_register_schema ( translucentcfg, translucentocs );
 824         if ( rc ) return rc;
 825
 826         return(overlay_register(&translucent));
 827 }
 828
 829 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
 830 int init_module(int argc, char *argv[]) {
 831         return translucent_initialize();
 832 }
 833 #endif
 834
 835 #endif /* SLAPD_OVER_TRANSLUCENT */