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 2004-2010 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         AttributeName *local;   /* valid attrs for local filters */
  40         AttributeName *remote;  /* valid attrs for remote filters */
  41         int strict;
  42         int no_glue;
  43         int defer_db_open;
  44         int bind_local;
  45         int pwmod_local;
  46 } translucent_info;
  47
  48 static ConfigLDAPadd translucent_ldadd;
  49 static ConfigCfAdd translucent_cfadd;
  50
  51 static ConfigDriver translucent_cf_gen;
  52
  53 enum {
  54         TRANS_LOCAL = 1,
  55         TRANS_REMOTE
  56 };
  57
  58 static ConfigTable translucentcfg[] = {
  59         { "translucent_strict", "on|off", 1, 2, 0,
  60           ARG_ON_OFF|ARG_OFFSET,
  61           (void *)offsetof(translucent_info, strict),
  62           "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
  63           "DESC 'Reveal attribute deletion constraint violations' "
  64           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  65         { "translucent_no_glue", "on|off", 1, 2, 0,
  66           ARG_ON_OFF|ARG_OFFSET,
  67           (void *)offsetof(translucent_info, no_glue),
  68           "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
  69           "DESC 'Disable automatic glue records for ADD and MODRDN' "
  70           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  71         { "translucent_local", "attr[,attr...]", 1, 2, 0,
  72           ARG_MAGIC|TRANS_LOCAL,
  73           translucent_cf_gen,
  74           "( OLcfgOvAt:14.3 NAME 'olcTranslucentLocal' "
  75           "DESC 'Attributes to use in local search filter' "
  76           "SYNTAX OMsDirectoryString )", NULL, NULL },
  77         { "translucent_remote", "attr[,attr...]", 1, 2, 0,
  78           ARG_MAGIC|TRANS_REMOTE,
  79           translucent_cf_gen,
  80           "( OLcfgOvAt:14.4 NAME 'olcTranslucentRemote' "
  81           "DESC 'Attributes to use in remote search filter' "
  82           "SYNTAX OMsDirectoryString )", NULL, NULL },
  83         { "translucent_bind_local", "on|off", 1, 2, 0,
  84           ARG_ON_OFF|ARG_OFFSET,
  85           (void *)offsetof(translucent_info, bind_local),
  86           "( OLcfgOvAt:14.5 NAME 'olcTranslucentBindLocal' "
  87           "DESC 'Enable local bind' "
  88           "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
  89         { "translucent_pwmod_local", "on|off", 1, 2, 0,
  90           ARG_ON_OFF|ARG_OFFSET,
  91           (void *)offsetof(translucent_info, pwmod_local),
  92           "( OLcfgOvAt:14.6 NAME 'olcTranslucentPwModLocal' "
  93           "DESC 'Enable local RFC 3062 Password Modify extended operation' "
  94           "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
  95         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  96 };
  97
  98 static ConfigOCs translucentocs[] = {
  99         { "( OLcfgOvOc:14.1 "
 100           "NAME 'olcTranslucentConfig' "
 101           "DESC 'Translucent configuration' "
 102           "SUP olcOverlayConfig "
 103           "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue $"
 104           " olcTranslucentLocal $ olcTranslucentRemote $"
 105           " olcTranslucentBindLocal $ olcTranslucentPwModLocal ) )",
 106           Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
 107         { "( OLcfgOvOc:14.2 "
 108           "NAME 'olcTranslucentDatabase' "
 109           "DESC 'Translucent target database configuration' "
 110           "AUXILIARY )", Cft_Misc, olcDatabaseDummy, translucent_ldadd },
 111         { NULL, 0, NULL }
 112 };
 113 /* for translucent_init() */
 114
 115 static int
 116 translucent_ldadd_cleanup( ConfigArgs *ca )
 117 {
 118         slap_overinst *on = ca->ca_private;
 119         translucent_info *ov = on->on_bi.bi_private;
 120
 121         ov->defer_db_open = 0;
 122         return backend_startup_one( ca->be, &ca->reply );
 123 }
 124
 125 static int
 126 translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
 127 {
 128         slap_overinst *on;
 129         translucent_info *ov;
 130
 131         Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
 132
 133         if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
 134              cei->ce_bi->bi_cf_ocs != translucentocs )
 135                 return LDAP_CONSTRAINT_VIOLATION;
 136
 137         on = (slap_overinst *)cei->ce_bi;
 138         ov = on->on_bi.bi_private;
 139         ca->be = &ov->db;
 140         ca->ca_private = on;
 141         if ( CONFIG_ONLINE_ADD( ca ))
 142                 ca->cleanup = translucent_ldadd_cleanup;
 143         else
 144                 ov->defer_db_open = 0;
 145
 146         return LDAP_SUCCESS;
 147 }
 148
 149 static int
 150 translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
 151 {
 152         CfEntryInfo *cei = e->e_private;
 153         slap_overinst *on = (slap_overinst *)cei->ce_bi;
 154         translucent_info *ov = on->on_bi.bi_private;
 155         struct berval bv;
 156
 157         Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
 158
 159         /* FIXME: should not hardcode "olcDatabase" here */
 160         bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
 161                 "olcDatabase=" SLAP_X_ORDERED_FMT "%s",
 162                 0, ov->db.bd_info->bi_type );
 163         if ( bv.bv_len >= sizeof( ca->cr_msg ) ) {
 164                 return -1;
 165         }
 166         bv.bv_val = ca->cr_msg;
 167         ca->be = &ov->db;
 168         ov->defer_db_open = 0;
 169
 170         /* We can only create this entry if the database is table-driven
 171          */
 172         if ( ov->db.bd_info->bi_cf_ocs )
 173                 config_build_entry( op, rs, cei, ca, &bv,
 174                                     ov->db.bd_info->bi_cf_ocs,
 175                                     &translucentocs[1] );
 176
 177         return 0;
 178 }
 179
 180 static int
 181 translucent_cf_gen( ConfigArgs *c )
 182 {
 183         slap_overinst   *on = (slap_overinst *)c->bi;
 184         translucent_info *ov = on->on_bi.bi_private;
 185         AttributeName **an, *a2;
 186         int i;
 187
 188         if ( c->type == TRANS_LOCAL )
 189                 an = &ov->local;
 190         else
 191                 an = &ov->remote;
 192
 193         if ( c->op == SLAP_CONFIG_EMIT ) {
 194                 if ( !*an )
 195                         return 1;
 196                 for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) {
 197                         value_add_one( &c->rvalue_vals, &(*an)[i].an_name );
 198                 }
 199                 return ( i < 1 );
 200         } else if ( c->op == LDAP_MOD_DELETE ) {
 201                 if ( c->valx < 0 ) {
 202                         anlist_free( *an, 1, NULL );
 203                         *an = NULL;
 204                 } else {
 205                         i = c->valx;
 206                         ch_free( (*an)[i].an_name.bv_val );
 207                         do {
 208                                 (*an)[i] = (*an)[i+1];
 209                                 i++;
 210                         } while ( !BER_BVISNULL( &(*an)[i].an_name ));
 211                 }
 212                 return 0;
 213         }
 214         a2 = str2anlist( *an, c->argv[1], "," );
 215         if ( !a2 ) {
 216                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s",
 217                         c->argv[0], c->argv[1] );
 218                 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 219                         "%s: %s\n", c->log, c->cr_msg, 0 );
 220                 return ARG_BAD_CONF;
 221         }
 222         *an = a2;
 223         return 0;
 224 }
 225
 226 static slap_overinst translucent;
 227
 228 /*
 229 ** glue_parent()
 230 **      call syncrepl_add_glue() with the parent suffix;
 231 **
 232 */
 233
 234 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 235
 236 void glue_parent(Operation *op) {
 237         Operation nop = *op;
 238         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 239         struct berval ndn = BER_BVNULL;
 240         Attribute *a;
 241         Entry *e;
 242         struct berval   pdn;
 243
 244         dnParent( &op->o_req_ndn, &pdn );
 245         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 246
 247         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 248
 249         e = entry_alloc();
 250         e->e_id = NOID;
 251         ber_dupbv(&e->e_name, &ndn);
 252         ber_dupbv(&e->e_nname, &ndn);
 253
 254         a = attr_alloc( slap_schema.si_ad_objectClass );
 255         a->a_numvals = 2;
 256         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 257         ber_dupbv(&a->a_vals[0], &glue[0]);
 258         ber_dupbv(&a->a_vals[1], &glue[1]);
 259         ber_dupbv(&a->a_vals[2], &glue[2]);
 260         a->a_nvals = a->a_vals;
 261         a->a_next = e->e_attrs;
 262         e->e_attrs = a;
 263
 264         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 265         a->a_numvals = 1;
 266         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 267         ber_dupbv(&a->a_vals[0], &glue[1]);
 268         ber_dupbv(&a->a_vals[1], &glue[2]);
 269         a->a_nvals = a->a_vals;
 270         a->a_next = e->e_attrs;
 271         e->e_attrs = a;
 272
 273         nop.o_req_dn = ndn;
 274         nop.o_req_ndn = ndn;
 275         nop.ora_e = e;
 276
 277         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 278         syncrepl_add_glue(&nop, e);
 279         nop.o_bd->bd_info = (BackendInfo *) on;
 280
 281         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 282
 283         return;
 284 }
 285
 286 /*
 287 ** free_attr_chain()
 288 **      free only the Attribute*, not the contents;
 289 **
 290 */
 291 void free_attr_chain(Attribute *b) {
 292         Attribute *a;
 293         for(a=b; a; a=a->a_next) {
 294                 a->a_vals = NULL;
 295                 a->a_nvals = NULL;
 296         }
 297         attrs_free( b );
 298         return;
 299 }
 300
 301 /*
 302 ** translucent_add()
 303 **      if not bound as root, send ACCESS error;
 304 **      if glue, glue_parent();
 305 **      return CONTINUE;
 306 **
 307 */
 308
 309 static int translucent_add(Operation *op, SlapReply *rs) {
 310         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 311         translucent_info *ov = on->on_bi.bi_private;
 312         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 313                 op->o_req_dn.bv_val, 0, 0);
 314         if(!be_isroot(op)) {
 315                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 316                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 317                         "user modification of overlay database not permitted");
 318                 op->o_bd->bd_info = (BackendInfo *) on;
 319                 return(rs->sr_err);
 320         }
 321         if(!ov->no_glue) glue_parent(op);
 322         return(SLAP_CB_CONTINUE);
 323 }
 324
 325 /*
 326 ** translucent_modrdn()
 327 **      if not bound as root, send ACCESS error;
 328 **      if !glue, glue_parent();
 329 **      else return CONTINUE;
 330 **
 331 */
 332
 333 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 334         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 335         translucent_info *ov = on->on_bi.bi_private;
 336         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 337                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 338         if(!be_isroot(op)) {
 339                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 340                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 341                         "user modification of overlay database not permitted");
 342                 op->o_bd->bd_info = (BackendInfo *) on;
 343                 return(rs->sr_err);
 344         }
 345         if(!ov->no_glue) {
 346                 op->o_tag = LDAP_REQ_ADD;
 347                 glue_parent(op);
 348                 op->o_tag = LDAP_REQ_MODRDN;
 349         }
 350         return(SLAP_CB_CONTINUE);
 351 }
 352
 353 /*
 354 ** translucent_delete()
 355 **      if not bound as root, send ACCESS error;
 356 **      else return CONTINUE;
 357 **
 358 */
 359
 360 static int translucent_delete(Operation *op, SlapReply *rs) {
 361         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 362         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 363                 op->o_req_dn.bv_val, 0, 0);
 364         if(!be_isroot(op)) {
 365                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 366                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 367                         "user modification of overlay database not permitted");
 368                 op->o_bd->bd_info = (BackendInfo *) on;
 369                 return(rs->sr_err);
 370         }
 371         return(SLAP_CB_CONTINUE);
 372 }
 373
 374 static int
 375 translucent_tag_cb( Operation *op, SlapReply *rs )
 376 {
 377         op->o_tag = LDAP_REQ_MODIFY;
 378         op->orm_modlist = op->o_callback->sc_private;
 379         rs->sr_tag = slap_req2res( op->o_tag );
 380
 381         return SLAP_CB_CONTINUE;
 382 }
 383
 384 /*
 385 ** translucent_modify()
 386 **      modify in local backend if exists in both;
 387 **      otherwise, add to local backend;
 388 **      fail if not defined in captive backend;
 389 **
 390 */
 391
 392 static int translucent_modify(Operation *op, SlapReply *rs) {
 393         SlapReply nrs = { REP_RESULT };
 394
 395         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 396         translucent_info *ov = on->on_bi.bi_private;
 397         Entry *e = NULL, *re = NULL;
 398         Attribute *a, *ax;
 399         Modifications *m, **mm;
 400         BackendDB *db;
 401         int del, rc, erc = 0;
 402         slap_callback cb = { 0 };
 403
 404         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 405                 op->o_req_dn.bv_val, 0, 0);
 406
 407         if(ov->defer_db_open) {
 408                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 409                         "remote DB not available");
 410                 return(rs->sr_err);
 411         }
 412 /*
 413 ** fetch entry from the captive backend;
 414 ** if it did not exist, fail;
 415 ** release it, if captive backend supports this;
 416 **
 417 */
 418
 419         db = op->o_bd;
 420         op->o_bd = &ov->db;
 421         ov->db.be_acl = op->o_bd->be_acl;
 422         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 423         if(rc != LDAP_SUCCESS || re == NULL ) {
 424                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 425                         "attempt to modify nonexistent local record");
 426                 return(rs->sr_err);
 427         }
 428         op->o_bd = db;
 429 /*
 430 ** fetch entry from local backend;
 431 ** if it exists:
 432 **      foreach Modification:
 433 **          if attr not present in local:
 434 **              if Mod == LDAP_MOD_DELETE:
 435 **                  if remote attr not present, return NO_SUCH;
 436 **                  if remote attr present, drop this Mod;
 437 **              else force this Mod to LDAP_MOD_ADD;
 438 **      return CONTINUE;
 439 **
 440 */
 441
 442         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 443         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 444         op->o_bd->bd_info = (BackendInfo *) on;
 445
 446         if(e && rc == LDAP_SUCCESS) {
 447                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 448                 for(mm = &op->orm_modlist; *mm; ) {
 449                         m = *mm;
 450                         for(a = e->e_attrs; a; a = a->a_next)
 451                                 if(a->a_desc == m->sml_desc) break;
 452                         if(a) {
 453                                 mm = &m->sml_next;
 454                                 continue;               /* found local attr */
 455                         }
 456                         if(m->sml_op == LDAP_MOD_DELETE) {
 457                                 for(a = re->e_attrs; a; a = a->a_next)
 458                                         if(a->a_desc == m->sml_desc) break;
 459                                 /* not found remote attr */
 460                                 if(!a) {
 461                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 462                                         goto release;
 463                                 }
 464                                 if(ov->strict) {
 465                                         erc = LDAP_CONSTRAINT_VIOLATION;
 466                                         goto release;
 467                                 }
 468                                 Debug(LDAP_DEBUG_TRACE,
 469                                         "=> translucent_modify: silently dropping delete: %s\n",
 470                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 471                                 *mm = m->sml_next;
 472                                 m->sml_next = NULL;
 473                                 slap_mods_free(m, 1);
 474                                 continue;
 475                         }
 476                         m->sml_op = LDAP_MOD_ADD;
 477                         mm = &m->sml_next;
 478                 }
 479                 erc = SLAP_CB_CONTINUE;
 480 release:
 481                 if(re) {
 482                         if(ov->db.bd_info->bi_entry_release_rw) {
 483                                 op->o_bd = &ov->db;
 484                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 485                                 op->o_bd = db;
 486                         } else
 487                                 entry_free(re);
 488                 }
 489                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 490                 be_entry_release_r(op, e);
 491                 op->o_bd->bd_info = (BackendInfo *) on;
 492                 if(erc == SLAP_CB_CONTINUE) {
 493                         return(erc);
 494                 } else if(erc) {
 495                         send_ldap_error(op, rs, erc,
 496                                 "attempt to delete nonexistent attribute");
 497                         return(erc);
 498                 }
 499         }
 500
 501         /* don't leak remote entry copy */
 502         if(re) {
 503                 if(ov->db.bd_info->bi_entry_release_rw) {
 504                         op->o_bd = &ov->db;
 505                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 506                         op->o_bd = db;
 507                 } else
 508                         entry_free(re);
 509         }
 510 /*
 511 ** foreach Modification:
 512 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 513 ** if no Modifications were suitable:
 514 **      if strict, throw CONSTRAINT_VIOLATION;
 515 **      else, return early SUCCESS;
 516 ** fabricate Entry with new Attribute chain;
 517 ** glue_parent() for this Entry;
 518 ** call bi_op_add() in local backend;
 519 **
 520 */
 521
 522         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 523         a = NULL;
 524         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 525                 Attribute atmp;
 526                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 527                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 528                         Debug(LDAP_DEBUG_ANY,
 529                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 530                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 531                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 532                         continue;
 533                 }
 534                 atmp.a_desc = m->sml_desc;
 535                 atmp.a_vals = m->sml_values;
 536                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 537                 atmp.a_numvals = m->sml_numvals;
 538                 atmp.a_flags = 0;
 539                 a = attr_dup( &atmp );
 540                 a->a_next  = ax;
 541                 ax = a;
 542         }
 543
 544         if(del && ov->strict) {
 545                 attrs_free( a );
 546                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 547                         "attempt to delete attributes from local database");
 548                 return(rs->sr_err);
 549         }
 550
 551         if(!ax) {
 552                 if(ov->strict) {
 553                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 554                                 "modification contained other than ADD or REPLACE");
 555                         return(rs->sr_err);
 556                 }
 557                 /* rs->sr_text = "no valid modification found"; */
 558                 rs->sr_err = LDAP_SUCCESS;
 559                 send_ldap_result(op, rs);
 560                 return(rs->sr_err);
 561         }
 562
 563         e = entry_alloc();
 564         ber_dupbv( &e->e_name, &op->o_req_dn );
 565         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 566         e->e_attrs = a;
 567
 568         op->o_tag       = LDAP_REQ_ADD;
 569         cb.sc_response = translucent_tag_cb;
 570         cb.sc_private = op->orm_modlist;
 571         op->oq_add.rs_e = e;
 572
 573         glue_parent(op);
 574
 575         cb.sc_next = op->o_callback;
 576         op->o_callback = &cb;
 577         rc = on->on_info->oi_orig->bi_op_add(op, &nrs);
 578         if ( op->ora_e == e )
 579                 entry_free( e );
 580         op->o_callback = cb.sc_next;
 581
 582         return(rc);
 583 }
 584
 585 static int translucent_compare(Operation *op, SlapReply *rs) {
 586         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 587         translucent_info *ov = on->on_bi.bi_private;
 588         AttributeAssertion *ava = op->orc_ava;
 589         Entry *e = NULL;
 590         BackendDB *db;
 591         int rc;
 592
 593         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 594                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 595
 596 /*
 597 ** if the local backend has an entry for this attribute:
 598 **      CONTINUE and let it do the compare;
 599 **
 600 */
 601         rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on);
 602         if(rc == LDAP_SUCCESS && e) {
 603                 overlay_entry_release_ov(op, e, 0, on);
 604                 return(SLAP_CB_CONTINUE);
 605         }
 606
 607         if(ov->defer_db_open) {
 608                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 609                         "remote DB not available");
 610                 return(rs->sr_err);
 611         }
 612 /*
 613 ** call compare() in the captive backend;
 614 ** return the result;
 615 **
 616 */
 617         db = op->o_bd;
 618         op->o_bd = &ov->db;
 619         ov->db.be_acl = op->o_bd->be_acl;
 620         rc = ov->db.bd_info->bi_op_compare(op, rs);
 621         op->o_bd = db;
 622
 623         return(rc);
 624 }
 625
 626 static int translucent_pwmod(Operation *op, SlapReply *rs) {
 627         SlapReply nrs = { REP_RESULT };
 628         Operation nop;
 629
 630         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 631         translucent_info *ov = on->on_bi.bi_private;
 632         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 633         Entry *e = NULL, *re = NULL;
 634         BackendDB *db;
 635         int rc = 0;
 636         slap_callback cb = { 0 };
 637
 638         if (!ov->pwmod_local) {
 639                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION,
 640                 rs->sr_text = "attempt to modify password in local database";
 641                 return rs->sr_err;
 642         }
 643
 644 /*
 645 ** fetch entry from the captive backend;
 646 ** if it did not exist, fail;
 647 ** release it, if captive backend supports this;
 648 **
 649 */
 650         db = op->o_bd;
 651         op->o_bd = &ov->db;
 652         ov->db.be_acl = op->o_bd->be_acl;
 653         rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 654         if(rc != LDAP_SUCCESS || re == NULL ) {
 655                 send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
 656                         "attempt to modify nonexistent local record");
 657                 return(rs->sr_err);
 658         }
 659         op->o_bd = db;
 660 /*
 661 ** fetch entry from local backend;
 662 ** if it exists:
 663 **      return CONTINUE;
 664 */
 665
 666         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 667         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 668         op->o_bd->bd_info = (BackendInfo *) on;
 669
 670         if(e && rc == LDAP_SUCCESS) {
 671                 if(re) {
 672                         if(ov->db.bd_info->bi_entry_release_rw) {
 673                                 op->o_bd = &ov->db;
 674                                 ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 675                                 op->o_bd = db;
 676                         } else {
 677                                 entry_free(re);
 678                         }
 679                 }
 680                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 681                 be_entry_release_r(op, e);
 682                 op->o_bd->bd_info = (BackendInfo *) on;
 683                 return SLAP_CB_CONTINUE;
 684         }
 685
 686         /* don't leak remote entry copy */
 687         if(re) {
 688                 if(ov->db.bd_info->bi_entry_release_rw) {
 689                         op->o_bd = &ov->db;
 690                         ov->db.bd_info->bi_entry_release_rw(op, re, 0);
 691                         op->o_bd = db;
 692                 } else {
 693                         entry_free(re);
 694                 }
 695         }
 696 /*
 697 ** glue_parent() for this Entry;
 698 ** call bi_op_add() in local backend;
 699 **
 700 */
 701         e = entry_alloc();
 702         ber_dupbv( &e->e_name, &op->o_req_dn );
 703         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 704         e->e_attrs = NULL;
 705
 706         nop = *op;
 707         nop.o_tag = LDAP_REQ_ADD;
 708         cb.sc_response = slap_null_cb;
 709         nop.oq_add.rs_e = e;
 710
 711         glue_parent(&nop);
 712
 713         nop.o_callback = &cb;
 714         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 715         if ( nop.ora_e == e ) {
 716                 entry_free( e );
 717         }
 718
 719         if ( rc == LDAP_SUCCESS ) {
 720                 return SLAP_CB_CONTINUE;
 721         }
 722
 723         return rc;
 724 }
 725
 726 static int translucent_exop(Operation *op, SlapReply *rs) {
 727         SlapReply nrs = { REP_RESULT };
 728
 729         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 730         translucent_info *ov = on->on_bi.bi_private;
 731         const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
 732
 733         Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n",
 734                 op->o_req_dn.bv_val, 0, 0);
 735
 736         if(ov->defer_db_open) {
 737                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 738                         "remote DB not available");
 739                 return(rs->sr_err);
 740         }
 741
 742         if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) {
 743                 return translucent_pwmod( op, rs );
 744         }
 745
 746         return SLAP_CB_CONTINUE;
 747 }
 748
 749 /*
 750 ** translucent_search_cb()
 751 **      merge local data with remote data
 752 **
 753 ** Four cases:
 754 ** 1: remote search, no local filter
 755 **      merge data and send immediately
 756 ** 2: remote search, with local filter
 757 **      merge data and save
 758 ** 3: local search, no remote filter
 759 **      merge data and send immediately
 760 ** 4: local search, with remote filter
 761 **      check list, merge, send, delete
 762 */
 763
 764 #define RMT_SIDE        0
 765 #define LCL_SIDE        1
 766 #define USE_LIST        2
 767
 768 typedef struct trans_ctx {
 769         BackendDB *db;
 770         slap_overinst *on;
 771         Filter *orig;
 772         Avlnode *list;
 773         int step;
 774         int slimit;
 775         AttributeName *attrs;
 776 } trans_ctx;
 777
 778 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 779         trans_ctx *tc;
 780         BackendDB *db;
 781         slap_overinst *on;
 782         translucent_info *ov;
 783         Entry *le, *re;
 784         Attribute *a, *ax, *an, *as = NULL;
 785         int rc;
 786         int test_f = 0;
 787
 788         tc = op->o_callback->sc_private;
 789
 790         /* Don't let the op complete while we're gathering data */
 791         if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
 792                 return 0;
 793
 794         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 795                 return(SLAP_CB_CONTINUE);
 796
 797         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 798                 rs->sr_entry->e_name.bv_val, 0, 0);
 799
 800         op->ors_slimit = tc->slimit + ( tc->slimit > 0 ? 1 : 0 );
 801         if ( op->ors_attrs == slap_anlist_all_attributes ) {
 802                 op->ors_attrs = tc->attrs;
 803                 rs->sr_attrs = tc->attrs;
 804                 rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
 805         }
 806
 807         on = tc->on;
 808         ov = on->on_bi.bi_private;
 809
 810         db = op->o_bd;
 811         re = NULL;
 812
 813         /* If we have local, get remote */
 814         if ( tc->step & LCL_SIDE ) {
 815                 le = rs->sr_entry;
 816                 /* If entry is already on list, use it */
 817                 if ( tc->step & USE_LIST ) {
 818                         re = tavl_delete( &tc->list, le, entry_dn_cmp );
 819                         if ( re ) {
 820                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 821                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 822                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 823                                 }
 824                                 if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 825                                         rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 826                                         entry_free( rs->sr_entry );
 827                                 }
 828                                 rc = test_filter( op, re, tc->orig );
 829                                 if ( rc == LDAP_COMPARE_TRUE ) {
 830                                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 831                                         rs->sr_entry = re;
 832
 833                                         if ( tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
 834                                                 return LDAP_SIZELIMIT_EXCEEDED;
 835                                         }
 836
 837                                         return SLAP_CB_CONTINUE;
 838                                 } else {
 839                                         entry_free( re );
 840                                         rs->sr_entry = NULL;
 841                                         return 0;
 842                                 }
 843                         }
 844                 }
 845                 op->o_bd = &ov->db;
 846                 rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
 847                 if ( rc == LDAP_SUCCESS && re ) {
 848                         Entry *tmp = entry_dup( re );
 849                         be_entry_release_r( op, re );
 850                         re = tmp;
 851                         test_f = 1;
 852                 }
 853         } else {
 854         /* Else we have remote, get local */
 855                 op->o_bd = tc->db;
 856                 le = NULL;
 857                 rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
 858                 if ( rc == LDAP_SUCCESS && le ) {
 859                         re = entry_dup( rs->sr_entry );
 860                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 861                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 862                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 863                         }
 864                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 865                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 866                                 entry_free( rs->sr_entry );
 867                         }
 868                 } else {
 869                         le = NULL;
 870                 }
 871         }
 872
 873 /*
 874 ** if we got remote and local entry:
 875 **      foreach local attr:
 876 **              foreach remote attr:
 877 **                      if match, remote attr with local attr;
 878 **                      if new local, add to list;
 879 **      append new local attrs to remote;
 880 **
 881 */
 882
 883         if ( re && le ) {
 884                 for(ax = le->e_attrs; ax; ax = ax->a_next) {
 885                         for(a = re->e_attrs; a; a = a->a_next) {
 886                                 if(a->a_desc == ax->a_desc) {
 887                                         test_f = 1;
 888                                         if(a->a_vals != a->a_nvals)
 889                                                 ber_bvarray_free(a->a_nvals);
 890                                         ber_bvarray_free(a->a_vals);
 891                                         ber_bvarray_dup_x( &a->a_vals, ax->a_vals, NULL );
 892                                         if ( ax->a_vals == ax->a_nvals ) {
 893                                                 a->a_nvals = a->a_vals;
 894                                         } else {
 895                                                 ber_bvarray_dup_x( &a->a_nvals, ax->a_nvals, NULL );
 896                                         }
 897                                         break;
 898                                 }
 899                         }
 900                         if(a) continue;
 901                         an = attr_dup(ax);
 902                         an->a_next = as;
 903                         as = an;
 904                 }
 905                 /* Dispose of local entry */
 906                 if ( tc->step & LCL_SIDE ) {
 907                         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
 908                                 rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
 909                                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
 910                         }
 911                         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
 912                                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
 913                                 entry_free( rs->sr_entry );
 914                         }
 915                 } else {
 916                         overlay_entry_release_ov(op, le, 0, on);
 917                 }
 918
 919                 /* literally append, so locals are always last */
 920                 if(as) {
 921                         if(re->e_attrs) {
 922                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 923                                 ax->a_next = as;
 924                         } else {
 925                                 re->e_attrs = as;
 926                         }
 927                 }
 928                 /* If both filters, save entry for later */
 929                 if ( tc->step == (USE_LIST|RMT_SIDE) ) {
 930                         tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error );
 931                         rs->sr_entry = NULL;
 932                         rc = 0;
 933                 } else {
 934                 /* send it now */
 935                         rs->sr_entry = re;
 936                         rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 937                         if ( test_f ) {
 938                                 rc = test_filter( op, rs->sr_entry, tc->orig );
 939                                 if ( rc == LDAP_COMPARE_TRUE ) {
 940                                         rc = SLAP_CB_CONTINUE;
 941                                 } else {
 942                                         rc = 0;
 943                                 }
 944                         } else {
 945                                 rc = SLAP_CB_CONTINUE;
 946                         }
 947                 }
 948         } else if ( le ) {
 949         /* Only a local entry: remote was deleted
 950          * Ought to delete the local too...
 951          */
 952                 rc = 0;
 953         } else if ( tc->step & USE_LIST ) {
 954         /* Only a remote entry, but both filters:
 955          * Test the complete filter
 956          */
 957                 rc = test_filter( op, rs->sr_entry, tc->orig );
 958                 if ( rc == LDAP_COMPARE_TRUE ) {
 959                         rc = SLAP_CB_CONTINUE;
 960                 } else {
 961                         rc = 0;
 962                 }
 963         } else {
 964         /* Only a remote entry, only remote filter:
 965          * just pass thru
 966          */
 967                 rc = SLAP_CB_CONTINUE;
 968         }
 969
 970         op->o_bd = db;
 971
 972         if ( rc == SLAP_CB_CONTINUE && tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
 973                 return LDAP_SIZELIMIT_EXCEEDED;
 974         }
 975
 976         return rc;
 977 }
 978
 979 /* Dup the filter, excluding invalid elements */
 980 static Filter *
 981 trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
 982 {
 983         Filter *n = NULL;
 984
 985         if ( !f )
 986                 return NULL;
 987
 988         switch( f->f_choice & SLAPD_FILTER_MASK ) {
 989         case SLAPD_FILTER_COMPUTED:
 990                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 991                 n->f_choice = f->f_choice;
 992                 n->f_result = f->f_result;
 993                 n->f_next = NULL;
 994                 break;
 995
 996         case LDAP_FILTER_PRESENT:
 997                 if ( ad_inlist( f->f_desc, an )) {
 998                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 999                         n->f_choice = f->f_choice;
1000                         n->f_desc = f->f_desc;
1001                         n->f_next = NULL;
1002                 }
1003                 break;
1004
1005         case LDAP_FILTER_EQUALITY:
1006         case LDAP_FILTER_GE:
1007         case LDAP_FILTER_LE:
1008         case LDAP_FILTER_APPROX:
1009         case LDAP_FILTER_SUBSTRINGS:
1010         case LDAP_FILTER_EXT:
1011                 if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
1012                         n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1013                         n->f_choice = f->f_choice;
1014                         n->f_ava = f->f_ava;
1015                         n->f_next = NULL;
1016                 }
1017                 break;
1018
1019         case LDAP_FILTER_AND:
1020         case LDAP_FILTER_OR:
1021         case LDAP_FILTER_NOT: {
1022                 Filter **p;
1023
1024                 n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1025                 n->f_choice = f->f_choice;
1026                 n->f_next = NULL;
1027
1028                 for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
1029                         *p = trans_filter_dup( op, f, an );
1030                         if ( !*p )
1031                                 continue;
1032                         p = &(*p)->f_next;
1033                 }
1034                 /* nothing valid in this list */
1035                 if ( !n->f_list ) {
1036                         op->o_tmpfree( n, op->o_tmpmemctx );
1037                         return NULL;
1038                 }
1039                 /* Only 1 element in this list */
1040                 if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
1041                         !n->f_list->f_next ) {
1042                         f = n->f_list;
1043                         *n = *f;
1044                         op->o_tmpfree( f, op->o_tmpmemctx );
1045                 }
1046                 break;
1047         }
1048         }
1049         return n;
1050 }
1051
1052 static void
1053 trans_filter_free( Operation *op, Filter *f )
1054 {
1055         Filter *n, *p, *next;
1056
1057         f->f_choice &= SLAPD_FILTER_MASK;
1058
1059         switch( f->f_choice ) {
1060         case LDAP_FILTER_AND:
1061         case LDAP_FILTER_OR:
1062         case LDAP_FILTER_NOT:
1063                 /* Free in reverse order */
1064                 n = NULL;
1065                 for ( p = f->f_list; p; p = next ) {
1066                         next = p->f_next;
1067                         p->f_next = n;
1068                         n = p;
1069                 }
1070                 for ( p = n; p; p = next ) {
1071                         next = p->f_next;
1072                         trans_filter_free( op, p );
1073                 }
1074                 break;
1075         default:
1076                 break;
1077         }
1078         op->o_tmpfree( f, op->o_tmpmemctx );
1079 }
1080
1081 /*
1082 ** translucent_search()
1083 **      search via captive backend;
1084 **      override results with any local data;
1085 **
1086 */
1087
1088 static int translucent_search(Operation *op, SlapReply *rs) {
1089         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1090         translucent_info *ov = on->on_bi.bi_private;
1091         slap_callback cb = { NULL, NULL, NULL, NULL };
1092         trans_ctx tc;
1093         Filter *fl, *fr;
1094         struct berval fbv;
1095         int rc = 0;
1096
1097         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
1098                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
1099
1100         if(ov->defer_db_open) {
1101                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1102                         "remote DB not available");
1103                 return(rs->sr_err);
1104         }
1105
1106         fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
1107         fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
1108         cb.sc_response = (slap_response *) translucent_search_cb;
1109         cb.sc_private = &tc;
1110         cb.sc_next = op->o_callback;
1111
1112         ov->db.be_acl = op->o_bd->be_acl;
1113         tc.db = op->o_bd;
1114         tc.on = on;
1115         tc.orig = op->ors_filter;
1116         tc.list = NULL;
1117         tc.step = 0;
1118         tc.slimit = op->ors_slimit;
1119         tc.attrs = NULL;
1120         fbv = op->ors_filterstr;
1121
1122         op->o_callback = &cb;
1123
1124         if ( fr || !fl ) {
1125                 tc.attrs = op->ors_attrs;
1126                 op->ors_slimit = SLAP_NO_LIMIT;
1127                 op->ors_attrs = slap_anlist_all_attributes;
1128                 op->o_bd = &ov->db;
1129                 tc.step |= RMT_SIDE;
1130                 if ( fl ) {
1131                         tc.step |= USE_LIST;
1132                         op->ors_filter = fr;
1133                         filter2bv_x( op, fr, &op->ors_filterstr );
1134                 }
1135                 rc = ov->db.bd_info->bi_op_search(op, rs);
1136                 op->ors_attrs = tc.attrs;
1137                 op->o_bd = tc.db;
1138                 if ( fl ) {
1139                         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1140                 }
1141         }
1142         if ( fl && !rc ) {
1143                 tc.step |= LCL_SIDE;
1144                 op->ors_filter = fl;
1145                 filter2bv_x( op, fl, &op->ors_filterstr );
1146                 rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
1147                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1148         }
1149         op->ors_filterstr = fbv;
1150         op->ors_filter = tc.orig;
1151         op->o_callback = cb.sc_next;
1152         rs->sr_attrs = op->ors_attrs;
1153         rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
1154
1155         /* Send out anything remaining on the list and finish */
1156         if ( tc.step & USE_LIST ) {
1157                 if ( tc.list ) {
1158                         Avlnode *av;
1159
1160                         av = tavl_end( tc.list, TAVL_DIR_LEFT );
1161                         while ( av ) {
1162                                 rs->sr_entry = av->avl_data;
1163                                 rc = test_filter( op, rs->sr_entry, op->ors_filter );
1164                                 if ( rc == LDAP_COMPARE_TRUE ) {
1165                                         rs->sr_flags = REP_ENTRY_MUSTBEFREED;
1166                                         rc = send_search_entry( op, rs );
1167                                         if ( rc ) break;
1168                                 } else {
1169                                         entry_free( rs->sr_entry );
1170                                 }
1171                                 av = tavl_next( av, TAVL_DIR_RIGHT );
1172                         }
1173                         tavl_free( tc.list, NULL );
1174                         rs->sr_entry = NULL;
1175                 }
1176                 send_ldap_result( op, rs );
1177         }
1178
1179         op->ors_slimit = tc.slimit;
1180
1181         /* Free in reverse order */
1182         if ( fl )
1183                 trans_filter_free( op, fl );
1184         if ( fr )
1185                 trans_filter_free( op, fr );
1186
1187         return rc;
1188 }
1189
1190
1191 /*
1192 ** translucent_bind()
1193 **      pass bind request to captive backend;
1194 **
1195 */
1196
1197 static int translucent_bind(Operation *op, SlapReply *rs) {
1198         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
1199         translucent_info *ov = on->on_bi.bi_private;
1200         BackendDB *db;
1201         slap_callback sc = { 0 }, *save_cb;
1202         int rc;
1203
1204         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
1205                 op->o_req_dn.bv_val, op->orb_method, 0);
1206
1207         if(ov->defer_db_open) {
1208                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
1209                         "remote DB not available");
1210                 return(rs->sr_err);
1211         }
1212
1213         if (ov->bind_local) {
1214                 sc.sc_response = slap_null_cb;
1215                 save_cb = op->o_callback;
1216                 op->o_callback = &sc;
1217         }
1218
1219         db = op->o_bd;
1220         op->o_bd = &ov->db;
1221         ov->db.be_acl = op->o_bd->be_acl;
1222         rc = ov->db.bd_info->bi_op_bind(op, rs);
1223         op->o_bd = db;
1224
1225         if (ov->bind_local) {
1226                 op->o_callback = save_cb;
1227                 if (rc != LDAP_SUCCESS) {
1228                         rc = SLAP_CB_CONTINUE;
1229                 }
1230         }
1231
1232         return rc;
1233 }
1234
1235 /*
1236 ** translucent_connection_destroy()
1237 **      pass disconnect notification to captive backend;
1238 **
1239 */
1240
1241 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
1242         slap_overinst *on = (slap_overinst *) be->bd_info;
1243         translucent_info *ov = on->on_bi.bi_private;
1244         int rc = 0;
1245
1246         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
1247
1248         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
1249
1250         return(rc);
1251 }
1252
1253 /*
1254 ** translucent_db_config()
1255 **      pass config directives to captive backend;
1256 **      parse unrecognized directives ourselves;
1257 **
1258 */
1259
1260 static int translucent_db_config(
1261         BackendDB       *be,
1262         const char      *fname,
1263         int             lineno,
1264         int             argc,
1265         char            **argv
1266 )
1267 {
1268         slap_overinst *on = (slap_overinst *) be->bd_info;
1269         translucent_info *ov = on->on_bi.bi_private;
1270
1271         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
1272               argc ? argv[0] : "", 0, 0);
1273
1274         /* Something for the captive database? */
1275         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
1276                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
1277                         argc, argv );
1278         return SLAP_CONF_UNKNOWN;
1279 }
1280
1281 /*
1282 ** translucent_db_init()
1283 **      initialize the captive backend;
1284 **
1285 */
1286
1287 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
1288         slap_overinst *on = (slap_overinst *) be->bd_info;
1289         translucent_info *ov;
1290
1291         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
1292
1293         ov = ch_calloc(1, sizeof(translucent_info));
1294         on->on_bi.bi_private = ov;
1295         ov->db = *be;
1296         ov->db.be_private = NULL;
1297         ov->defer_db_open = 1;
1298
1299         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
1300                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
1301                 return 1;
1302         }
1303         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
1304         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
1305
1306         return 0;
1307 }
1308
1309 /*
1310 ** translucent_db_open()
1311 **      if the captive backend has an open() method, call it;
1312 **
1313 */
1314
1315 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
1316         slap_overinst *on = (slap_overinst *) be->bd_info;
1317         translucent_info *ov = on->on_bi.bi_private;
1318         int rc;
1319
1320         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
1321
1322         /* need to inherit something from the original database... */
1323         ov->db.be_def_limit = be->be_def_limit;
1324         ov->db.be_limits = be->be_limits;
1325         ov->db.be_acl = be->be_acl;
1326         ov->db.be_dfltaccess = be->be_dfltaccess;
1327
1328         if ( ov->defer_db_open )
1329                 return 0;
1330
1331         rc = backend_startup_one( &ov->db, cr );
1332
1333         if(rc) Debug(LDAP_DEBUG_TRACE,
1334                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
1335
1336         return(rc);
1337 }
1338
1339 /*
1340 ** translucent_db_close()
1341 **      if the captive backend has a close() method, call it
1342 **
1343 */
1344
1345 static int
1346 translucent_db_close( BackendDB *be, ConfigReply *cr )
1347 {
1348         slap_overinst *on = (slap_overinst *) be->bd_info;
1349         translucent_info *ov = on->on_bi.bi_private;
1350         int rc = 0;
1351
1352         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
1353
1354         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
1355                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
1356         }
1357
1358         return(rc);
1359 }
1360
1361 /*
1362 ** translucent_db_destroy()
1363 **      if the captive backend has a db_destroy() method, call it;
1364 **      free any config data
1365 **
1366 */
1367
1368 static int
1369 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
1370 {
1371         slap_overinst *on = (slap_overinst *) be->bd_info;
1372         translucent_info *ov = on->on_bi.bi_private;
1373         int rc = 0;
1374
1375         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
1376
1377         if ( ov ) {
1378                 if ( ov->remote )
1379                         anlist_free( ov->remote, 1, NULL );
1380                 if ( ov->local )
1381                         anlist_free( ov->local, 1, NULL );
1382                 if ( ov->db.be_private != NULL ) {
1383                         backend_stopdown_one( &ov->db );
1384                 }
1385
1386                 ch_free(ov);
1387                 on->on_bi.bi_private = NULL;
1388         }
1389
1390         return(rc);
1391 }
1392
1393 /*
1394 ** translucent_initialize()
1395 **      initialize the slap_overinst with our entry points;
1396 **
1397 */
1398
1399 int translucent_initialize() {
1400
1401         int rc;
1402
1403         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
1404
1405         translucent.on_bi.bi_type       = "translucent";
1406         translucent.on_bi.bi_db_init    = translucent_db_init;
1407         translucent.on_bi.bi_db_config  = translucent_db_config;
1408         translucent.on_bi.bi_db_open    = translucent_db_open;
1409         translucent.on_bi.bi_db_close   = translucent_db_close;
1410         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
1411         translucent.on_bi.bi_op_bind    = translucent_bind;
1412         translucent.on_bi.bi_op_add     = translucent_add;
1413         translucent.on_bi.bi_op_modify  = translucent_modify;
1414         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
1415         translucent.on_bi.bi_op_delete  = translucent_delete;
1416         translucent.on_bi.bi_op_search  = translucent_search;
1417         translucent.on_bi.bi_op_compare = translucent_compare;
1418         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
1419         translucent.on_bi.bi_extended   = translucent_exop;
1420
1421         translucent.on_bi.bi_cf_ocs = translucentocs;
1422         rc = config_register_schema ( translucentcfg, translucentocs );
1423         if ( rc ) return rc;
1424
1425         return(overlay_register(&translucent));
1426 }
1427
1428 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
1429 int init_module(int argc, char *argv[]) {
1430         return translucent_initialize();
1431 }
1432 #endif
1433
1434 #endif /* SLAPD_OVER_TRANSLUCENT */