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         int defer_db_open;
  42 } translucent_info;
  43
  44 static ConfigLDAPadd translucent_ldadd;
  45 static ConfigCfAdd translucent_cfadd;
  46
  47 static ConfigTable translucentcfg[] = {
  48         { "translucent_strict", "on|off", 1, 2, 0,
  49           ARG_ON_OFF|ARG_OFFSET,
  50           (void *)offsetof(translucent_info, strict),
  51           "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
  52           "DESC 'Reveal attribute deletion constraint violations' "
  53           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  54         { "translucent_no_glue", "on|off", 1, 2, 0,
  55           ARG_ON_OFF|ARG_OFFSET,
  56           (void *)offsetof(translucent_info, no_glue),
  57           "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
  58           "DESC 'Disable automatic glue records for ADD and MODRDN' "
  59           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
  60         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  61 };
  62
  63 static ConfigTable transdummy[] = {
  64         { "", "", 0, 0, 0, ARG_IGNORED,
  65                 NULL, "( OLcfgGlAt:13 NAME 'olcDatabase' "
  66                         "DESC 'The backend type for a database instance' "
  67                         "SUP olcBackend SINGLE-VALUE X-ORDERED 'SIBLINGS' )", NULL, NULL },
  68         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  69 };
  70
  71 static ConfigOCs translucentocs[] = {
  72         { "( OLcfgOvOc:14.1 "
  73           "NAME 'olcTranslucentConfig' "
  74           "DESC 'Translucent configuration' "
  75           "SUP olcOverlayConfig "
  76           "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue ) )",
  77           Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
  78         { "( OLcfgOvOc:14.2 "
  79           "NAME 'olcTranslucentDatabase' "
  80           "DESC 'Translucent target database configuration' "
  81           "AUXILIARY )", Cft_Misc, transdummy, translucent_ldadd },
  82         { NULL, 0, NULL }
  83 };
  84 /* for translucent_init() */
  85
  86 static int
  87 translucent_ldadd_cleanup( ConfigArgs *ca )
  88 {
  89         slap_overinst *on = ca->private;
  90         translucent_info *ov = on->on_bi.bi_private;
  91
  92         ov->defer_db_open = 0;
  93         return backend_startup_one( ca->be, &ca->reply );
  94 }
  95
  96 static int
  97 translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
  98 {
  99         slap_overinst *on;
 100         translucent_info *ov;
 101
 102         Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
 103
 104         if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
 105              cei->ce_bi->bi_cf_ocs != translucentocs )
 106                 return LDAP_CONSTRAINT_VIOLATION;
 107
 108         on = (slap_overinst *)cei->ce_bi;
 109         ov = on->on_bi.bi_private;
 110         ca->be = &ov->db;
 111         ca->private = on;
 112         if ( CONFIG_ONLINE_ADD( ca ))
 113                 ca->cleanup = translucent_ldadd_cleanup;
 114         else
 115                 ov->defer_db_open = 0;
 116
 117         return LDAP_SUCCESS;
 118 }
 119
 120 static int
 121 translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
 122 {
 123         CfEntryInfo *cei = e->e_private;
 124         slap_overinst *on = (slap_overinst *)cei->ce_bi;
 125         translucent_info *ov = on->on_bi.bi_private;
 126         struct berval bv;
 127
 128         Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
 129
 130         /* FIXME: should not hardcode "olcDatabase" here */
 131         bv.bv_len = sprintf( ca->cr_msg, "olcDatabase=%s",
 132                              ov->db.bd_info->bi_type );
 133         bv.bv_val = ca->cr_msg;
 134         ca->be = &ov->db;
 135         ov->defer_db_open = 0;
 136
 137         /* We can only create this entry if the database is table-driven
 138          */
 139         if ( ov->db.bd_info->bi_cf_ocs )
 140                 config_build_entry( op, rs, cei, ca, &bv,
 141                                     ov->db.bd_info->bi_cf_ocs,
 142                                     &translucentocs[1] );
 143
 144         return 0;
 145 }
 146
 147 static slap_overinst translucent;
 148
 149 /*
 150 ** glue_parent()
 151 **      call syncrepl_add_glue() with the parent suffix;
 152 **
 153 */
 154
 155 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
 156
 157 void glue_parent(Operation *op) {
 158         Operation nop = *op;
 159         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 160         struct berval ndn = BER_BVNULL;
 161         Attribute *a;
 162         Entry *e;
 163         struct berval   pdn;
 164
 165         dnParent( &op->o_req_ndn, &pdn );
 166         ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
 167
 168         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
 169
 170         e = entry_alloc();
 171         e->e_id = NOID;
 172         ber_dupbv(&e->e_name, &ndn);
 173         ber_dupbv(&e->e_nname, &ndn);
 174
 175         a = attr_alloc( slap_schema.si_ad_objectClass );
 176         a->a_numvals = 2;
 177         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
 178         ber_dupbv(&a->a_vals[0], &glue[0]);
 179         ber_dupbv(&a->a_vals[1], &glue[1]);
 180         ber_dupbv(&a->a_vals[2], &glue[2]);
 181         a->a_nvals = a->a_vals;
 182         a->a_next = e->e_attrs;
 183         e->e_attrs = a;
 184
 185         a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
 186         a->a_numvals = 1;
 187         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
 188         ber_dupbv(&a->a_vals[0], &glue[1]);
 189         ber_dupbv(&a->a_vals[1], &glue[2]);
 190         a->a_nvals = a->a_vals;
 191         a->a_next = e->e_attrs;
 192         e->e_attrs = a;
 193
 194         nop.o_req_dn = ndn;
 195         nop.o_req_ndn = ndn;
 196         nop.ora_e = e;
 197
 198         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 199         syncrepl_add_glue(&nop, e);
 200         nop.o_bd->bd_info = (BackendInfo *) on;
 201
 202         op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 203
 204         return;
 205 }
 206
 207 /*
 208 ** dup_bervarray()
 209 **      copy a BerVarray;
 210 */
 211
 212 BerVarray dup_bervarray(BerVarray b) {
 213         int i, len;
 214         BerVarray nb;
 215         for(len = 0; b[len].bv_val; len++);
 216         nb = ch_malloc((len+1) * sizeof(BerValue));
 217         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 218         nb[len].bv_val = NULL;
 219         nb[len].bv_len = 0;
 220         return(nb);
 221 }
 222
 223 /*
 224 ** free_attr_chain()
 225 **      free only the Attribute*, not the contents;
 226 **
 227 */
 228 void free_attr_chain(Attribute *b) {
 229         Attribute *a;
 230         for(a=b; a; a=a->a_next) {
 231                 a->a_vals = NULL;
 232                 a->a_nvals = NULL;
 233         }
 234         attrs_free( b );
 235         return;
 236 }
 237
 238 /*
 239 ** translucent_add()
 240 **      if not bound as root, send ACCESS error;
 241 **      if glue, glue_parent();
 242 **      return CONTINUE;
 243 **
 244 */
 245
 246 static int translucent_add(Operation *op, SlapReply *rs) {
 247         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 248         translucent_info *ov = on->on_bi.bi_private;
 249         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 250                 op->o_req_dn.bv_val, 0, 0);
 251         if(!be_isroot(op)) {
 252                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 253                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 254                         "user modification of overlay database not permitted");
 255                 op->o_bd->bd_info = (BackendInfo *) on;
 256                 return(rs->sr_err);
 257         }
 258         if(!ov->no_glue) glue_parent(op);
 259         return(SLAP_CB_CONTINUE);
 260 }
 261
 262 /*
 263 ** translucent_modrdn()
 264 **      if not bound as root, send ACCESS error;
 265 **      if !glue, glue_parent();
 266 **      else return CONTINUE;
 267 **
 268 */
 269
 270 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 271         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 272         translucent_info *ov = on->on_bi.bi_private;
 273         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 274                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 275         if(!be_isroot(op)) {
 276                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 277                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 278                         "user modification of overlay database not permitted");
 279                 op->o_bd->bd_info = (BackendInfo *) on;
 280                 return(rs->sr_err);
 281         }
 282         if(!ov->no_glue) glue_parent(op);
 283         return(SLAP_CB_CONTINUE);
 284 }
 285
 286 /*
 287 ** translucent_delete()
 288 **      if not bound as root, send ACCESS error;
 289 **      else return CONTINUE;
 290 **
 291 */
 292
 293 static int translucent_delete(Operation *op, SlapReply *rs) {
 294         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 295         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 296                 op->o_req_dn.bv_val, 0, 0);
 297         if(!be_isroot(op)) {
 298                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 299                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 300                         "user modification of overlay database not permitted");
 301                 op->o_bd->bd_info = (BackendInfo *) on;
 302                 return(rs->sr_err);
 303         }
 304         return(SLAP_CB_CONTINUE);
 305 }
 306
 307 static int
 308 translucent_tag_cb( Operation *op, SlapReply *rs )
 309 {
 310         op->o_tag = LDAP_REQ_MODIFY;
 311         op->orm_modlist = op->o_callback->sc_private;
 312         rs->sr_tag = slap_req2res( op->o_tag );
 313
 314         return SLAP_CB_CONTINUE;
 315 }
 316
 317 /*
 318 ** translucent_modify()
 319 **      modify in local backend if exists in both;
 320 **      otherwise, add to local backend;
 321 **      fail if not defined in captive backend;
 322 **
 323 */
 324
 325 static int translucent_modify(Operation *op, SlapReply *rs) {
 326         SlapReply nrs = { REP_RESULT };
 327         Operation nop = *op;
 328
 329         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 330         translucent_info *ov = on->on_bi.bi_private;
 331         Entry *e = NULL, *re = NULL;
 332         Attribute *a, *ax;
 333         Modifications *m, **mm;
 334         int del, rc, erc = 0;
 335         slap_callback cb = { 0 };
 336
 337         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 338                 op->o_req_dn.bv_val, 0, 0);
 339
 340         if(ov->defer_db_open) {
 341                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 342                         "remote DB not available");
 343                 return(rs->sr_err);
 344         }
 345 /*
 346 ** fetch entry from the captive backend;
 347 ** if it did not exist, fail;
 348 ** release it, if captive backend supports this;
 349 **
 350 */
 351
 352         nop.o_bd = &ov->db;
 353         rc = ov->db.bd_info->bi_entry_get_rw(&nop, &nop.o_req_ndn, NULL, NULL, 0, &re);
 354         if(rc != LDAP_SUCCESS || re == NULL ) {
 355                 send_ldap_error((&nop), rs, LDAP_NO_SUCH_OBJECT,
 356                         "attempt to modify nonexistent local record");
 357                 return(rs->sr_err);
 358         }
 359         nop = *op;
 360 /*
 361 ** fetch entry from local backend;
 362 ** if it exists:
 363 **      foreach Modification:
 364 **          if attr not present in local:
 365 **              if Mod == LDAP_MOD_DELETE:
 366 **                  if remote attr not present, return NO_SUCH;
 367 **                  if remote attr present, drop this Mod;
 368 **              else force this Mod to LDAP_MOD_ADD;
 369 **      return CONTINUE;
 370 **
 371 */
 372
 373         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 374         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 375         op->o_bd->bd_info = (BackendInfo *) on;
 376
 377         if(e && rc == LDAP_SUCCESS) {
 378                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 379                 for(mm = &op->orm_modlist; *mm; ) {
 380                         m = *mm;
 381                         for(a = e->e_attrs; a; a = a->a_next)
 382                                 if(a->a_desc == m->sml_desc) break;
 383                         if(a) {
 384                                 mm = &m->sml_next;
 385                                 continue;               /* found local attr */
 386                         }
 387                         if(m->sml_op == LDAP_MOD_DELETE) {
 388                                 for(a = re->e_attrs; a; a = a->a_next)
 389                                         if(a->a_desc == m->sml_desc) break;
 390                                 /* not found remote attr */
 391                                 if(!a) {
 392                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 393                                         goto release;
 394                                 }
 395                                 if(ov->strict) {
 396                                         erc = LDAP_CONSTRAINT_VIOLATION;
 397                                         goto release;
 398                                 }
 399                                 Debug(LDAP_DEBUG_TRACE,
 400                                         "=> translucent_modify: silently dropping delete: %s\n",
 401                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 402                                 *mm = m->sml_next;
 403                                 m->sml_next = NULL;
 404                                 slap_mods_free(m, 1);
 405                                 continue;
 406                         }
 407                         m->sml_op = LDAP_MOD_ADD;
 408                         mm = &m->sml_next;
 409                 }
 410                 erc = SLAP_CB_CONTINUE;
 411 release:
 412                 if(re) {
 413                         if(ov->db.bd_info->bi_entry_release_rw)
 414                                 ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 415                         else
 416                                 entry_free(re);
 417                 }
 418                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 419                 be_entry_release_r(op, e);
 420                 op->o_bd->bd_info = (BackendInfo *) on;
 421                 if(erc == SLAP_CB_CONTINUE) {
 422                         return(erc);
 423                 } else if(erc) {
 424                         send_ldap_error(op, rs, erc,
 425                                 "attempt to delete nonexistent attribute");
 426                         return(erc);
 427                 }
 428         }
 429
 430         /* don't leak remote entry copy */
 431         if(re) {
 432                 if(ov->db.bd_info->bi_entry_release_rw)
 433                         ov->db.bd_info->bi_entry_release_rw(&nop, re, 0);
 434                 else
 435                         entry_free(re);
 436         }
 437 /*
 438 ** foreach Modification:
 439 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 440 ** if no Modifications were suitable:
 441 **      if strict, throw CONSTRAINT_VIOLATION;
 442 **      else, return early SUCCESS;
 443 ** fabricate Entry with new Attribute chain;
 444 ** glue_parent() for this Entry;
 445 ** call bi_op_add() in local backend;
 446 **
 447 */
 448
 449         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 450         a = NULL;
 451         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 452                 Attribute atmp;
 453                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 454                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 455                         Debug(LDAP_DEBUG_ANY,
 456                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 457                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 458                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 459                         continue;
 460                 }
 461                 atmp.a_desc = m->sml_desc;
 462                 atmp.a_vals = m->sml_values;
 463                 atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
 464                 atmp.a_numvals = m->sml_numvals;
 465                 atmp.a_flags = 0;
 466                 a = attr_dup( &atmp );
 467                 a->a_next  = ax;
 468                 ax = a;
 469         }
 470
 471         if(del && ov->strict) {
 472                 attrs_free( a );
 473                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 474                         "attempt to delete attributes from local database");
 475                 return(rs->sr_err);
 476         }
 477
 478         if(!ax) {
 479                 if(ov->strict) {
 480                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 481                                 "modification contained other than ADD or REPLACE");
 482                         return(rs->sr_err);
 483                 }
 484                 /* rs->sr_text = "no valid modification found"; */
 485                 rs->sr_err = LDAP_SUCCESS;
 486                 send_ldap_result(op, rs);
 487                 return(rs->sr_err);
 488         }
 489
 490         e = entry_alloc();
 491         ber_dupbv( &e->e_name, &op->o_req_dn );
 492         ber_dupbv( &e->e_nname, &op->o_req_ndn );
 493         e->e_attrs = a;
 494
 495         nop.o_tag       = LDAP_REQ_ADD;
 496         nop.oq_add.rs_e = e;
 497
 498         glue_parent(&nop);
 499
 500         cb.sc_response = translucent_tag_cb;
 501         cb.sc_private = op->orm_modlist;
 502         cb.sc_next = nop.o_callback;
 503         nop.o_callback = &cb;
 504         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 505         if ( nop.ora_e == e )
 506                 entry_free( e );
 507
 508         return(rc);
 509 }
 510
 511 static int translucent_compare(Operation *op, SlapReply *rs) {
 512         Operation nop = *op;
 513         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 514         translucent_info *ov = on->on_bi.bi_private;
 515         AttributeAssertion *ava = op->orc_ava;
 516         Entry *e;
 517         int rc;
 518
 519         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 520                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 521
 522 /*
 523 ** if the local backend has an entry for this attribute:
 524 **      CONTINUE and let it do the compare;
 525 **
 526 */
 527         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 528         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 529         if(e && rc == LDAP_SUCCESS) {
 530                 be_entry_release_r(op, e);
 531                 op->o_bd->bd_info = (BackendInfo *) on;
 532                 return(SLAP_CB_CONTINUE);
 533         }
 534         op->o_bd->bd_info = (BackendInfo *) on;
 535
 536         if(ov->defer_db_open) {
 537                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 538                         "remote DB not available");
 539                 return(rs->sr_err);
 540         }
 541 /*
 542 ** call compare() in the captive backend;
 543 ** return the result;
 544 **
 545 */
 546         nop.o_bd = &ov->db;
 547         nop.o_callback = NULL;
 548         rc = ov->db.bd_info->bi_op_compare(&nop, rs);
 549
 550         return(rc);
 551 }
 552
 553 /*
 554 ** translucent_search_cb()
 555 **      merge local data with the search result
 556 **
 557 */
 558
 559 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 560         slap_overinst *on;
 561         Entry *e, *re = NULL;
 562         Attribute *a, *ax, *an, *as = NULL;
 563         Operation * original_op, local_op;
 564         int rc;
 565
 566         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 567                 return(SLAP_CB_CONTINUE);
 568
 569         Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
 570                 rs->sr_entry->e_name.bv_val, 0, 0);
 571
 572         original_op = op->o_callback->sc_private;
 573         on = (slap_overinst *) original_op->o_bd->bd_info;
 574         local_op = *original_op;
 575
 576         local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 577         rc = be_entry_get_rw(&local_op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 578         local_op.o_bd->bd_info = (BackendInfo *) on;
 579
 580 /*
 581 ** if we got an entry from local backend:
 582 **      make a copy of this search result;
 583 **      foreach local attr:
 584 **              foreach search result attr:
 585 **                      if match, result attr with local attr;
 586 **                      if new local, add to list;
 587 **      append new local attrs to search result;
 588 **
 589 */
 590
 591         if(e && rc == LDAP_SUCCESS) {
 592                 re = entry_dup(rs->sr_entry);
 593                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 594 #if 0
 595                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 596 #endif
 597                         for(a = re->e_attrs; a; a = a->a_next) {
 598                                 if(a->a_desc == ax->a_desc) {
 599                                         if(a->a_vals != a->a_nvals)
 600                                                 ber_bvarray_free(a->a_nvals);
 601                                         ber_bvarray_free(a->a_vals);
 602                                         a->a_vals = dup_bervarray(ax->a_vals);
 603                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 604                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 605                                         break;
 606                                 }
 607                         }
 608                         if(a) continue;
 609                         an = attr_dup(ax);
 610                         an->a_next = as;
 611                         as = an;
 612                 }
 613                 local_op.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
 614                 be_entry_release_r(&local_op, e);
 615                 local_op.o_bd->bd_info = (BackendInfo *) on;
 616
 617                 /* literally append, so locals are always last */
 618                 if(as) {
 619                         if(re->e_attrs) {
 620                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 621                                 ax->a_next = as;
 622                         } else {
 623                                 re->e_attrs = as;
 624                         }
 625                 }
 626                 rs->sr_entry = re;
 627                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 628         }
 629
 630         return(SLAP_CB_CONTINUE);
 631 }
 632
 633 /*
 634 ** translucent_search()
 635 **      search via captive backend;
 636 **      override results with any local data;
 637 **
 638 */
 639
 640 static int translucent_search(Operation *op, SlapReply *rs) {
 641         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 642         Operation nop = *op;
 643         translucent_info *ov = on->on_bi.bi_private;
 644         slap_callback cb = { NULL, NULL, NULL, NULL };
 645
 646         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 647                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 648
 649         if(ov->defer_db_open) {
 650                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 651                         "remote DB not available");
 652                 return(rs->sr_err);
 653         }
 654         cb.sc_response = (slap_response *) translucent_search_cb;
 655         cb.sc_private = op;
 656         cb.sc_next = nop.o_callback;
 657
 658         nop.o_callback = &cb;
 659         nop.o_bd = &ov->db;
 660         return (ov->db.bd_info->bi_op_search(&nop, rs));
 661 }
 662
 663
 664 /*
 665 ** translucent_bind()
 666 **      pass bind request to captive backend;
 667 **
 668 */
 669
 670 static int translucent_bind(Operation *op, SlapReply *rs) {
 671         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 672         Operation nop = *op;
 673         translucent_info *ov = on->on_bi.bi_private;
 674
 675         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 676                 op->o_req_dn.bv_val, op->orb_method, 0);
 677
 678         if(ov->defer_db_open) {
 679                 send_ldap_error(op, rs, LDAP_UNAVAILABLE,
 680                         "remote DB not available");
 681                 return(rs->sr_err);
 682         }
 683         nop.o_bd = &ov->db;
 684         return (ov->db.bd_info->bi_op_bind(&nop, rs));
 685 }
 686
 687 /*
 688 ** translucent_connection_destroy()
 689 **      pass disconnect notification to captive backend;
 690 **
 691 */
 692
 693 static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
 694         slap_overinst *on = (slap_overinst *) be->bd_info;
 695         translucent_info *ov = on->on_bi.bi_private;
 696         int rc = 0;
 697
 698         Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
 699
 700         rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
 701
 702         return(rc);
 703 }
 704
 705 /*
 706 ** translucent_db_config()
 707 **      pass config directives to captive backend;
 708 **      parse unrecognized directives ourselves;
 709 **
 710 */
 711
 712 static int translucent_db_config(
 713         BackendDB       *be,
 714         const char      *fname,
 715         int             lineno,
 716         int             argc,
 717         char            **argv
 718 )
 719 {
 720         slap_overinst *on = (slap_overinst *) be->bd_info;
 721         translucent_info *ov = on->on_bi.bi_private;
 722
 723         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
 724               argc ? argv[0] : "", 0, 0);
 725
 726         /* Something for the captive database? */
 727         if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
 728                 return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
 729                         argc, argv );
 730         return SLAP_CONF_UNKNOWN;
 731 }
 732
 733 /*
 734 ** translucent_db_init()
 735 **      initialize the captive backend;
 736 **
 737 */
 738
 739 static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
 740         slap_overinst *on = (slap_overinst *) be->bd_info;
 741         translucent_info *ov;
 742
 743         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
 744
 745         ov = ch_calloc(1, sizeof(translucent_info));
 746         on->on_bi.bi_private = ov;
 747         ov->db = *be;
 748         ov->db.be_private = NULL;
 749         ov->db.be_pcl_mutexp = &ov->db.be_pcl_mutex;
 750         ov->defer_db_open = 1;
 751
 752         if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
 753                 Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
 754                 return 1;
 755         }
 756         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 757         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
 758
 759         return 0;
 760 }
 761
 762 /*
 763 ** translucent_db_open()
 764 **      if the captive backend has an open() method, call it;
 765 **
 766 */
 767
 768 static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
 769         slap_overinst *on = (slap_overinst *) be->bd_info;
 770         translucent_info *ov = on->on_bi.bi_private;
 771         int rc;
 772
 773         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
 774
 775         /* need to inherit something from the original database... */
 776         ov->db.be_def_limit = be->be_def_limit;
 777         ov->db.be_limits = be->be_limits;
 778         ov->db.be_acl = be->be_acl;
 779         ov->db.be_dfltaccess = be->be_dfltaccess;
 780
 781         if ( ov->defer_db_open )
 782                 return 0;
 783
 784         rc = backend_startup_one( &ov->db, NULL );
 785
 786         if(rc) Debug(LDAP_DEBUG_TRACE,
 787                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 788
 789         return(rc);
 790 }
 791
 792 /*
 793 ** translucent_db_close()
 794 **      if the captive backend has a close() method, call it;
 795 **      free any config data;
 796 **
 797 */
 798
 799 static int
 800 translucent_db_close( BackendDB *be, ConfigReply *cr )
 801 {
 802         slap_overinst *on = (slap_overinst *) be->bd_info;
 803         translucent_info *ov = on->on_bi.bi_private;
 804         int rc = 0;
 805
 806         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
 807
 808         if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
 809                 rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
 810         }
 811
 812         return(rc);
 813 }
 814
 815 /*
 816 ** translucent_db_destroy()
 817 **      if the captive backend has a db_destroy() method, call it
 818 **
 819 */
 820
 821 static int
 822 translucent_db_destroy( BackendDB *be, ConfigReply *cr )
 823 {
 824         slap_overinst *on = (slap_overinst *) be->bd_info;
 825         translucent_info *ov = on->on_bi.bi_private;
 826         int rc = 0;
 827
 828         Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
 829
 830         if ( ov ) {
 831                 if ( ov->db.be_private != NULL ) {
 832                         backend_stopdown_one( &ov->db );
 833                 }
 834
 835                 ch_free(ov);
 836                 on->on_bi.bi_private = NULL;
 837         }
 838
 839         return(rc);
 840 }
 841
 842 /*
 843 ** translucent_initialize()
 844 **      initialize the slap_overinst with our entry points;
 845 **
 846 */
 847
 848 int translucent_initialize() {
 849
 850         int rc;
 851
 852         Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
 853
 854         translucent.on_bi.bi_type       = "translucent";
 855         translucent.on_bi.bi_db_init    = translucent_db_init;
 856         translucent.on_bi.bi_db_config  = translucent_db_config;
 857         translucent.on_bi.bi_db_open    = translucent_db_open;
 858         translucent.on_bi.bi_db_close   = translucent_db_close;
 859         translucent.on_bi.bi_db_destroy = translucent_db_destroy;
 860         translucent.on_bi.bi_op_bind    = translucent_bind;
 861         translucent.on_bi.bi_op_add     = translucent_add;
 862         translucent.on_bi.bi_op_modify  = translucent_modify;
 863         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 864         translucent.on_bi.bi_op_delete  = translucent_delete;
 865         translucent.on_bi.bi_op_search  = translucent_search;
 866         translucent.on_bi.bi_op_compare = translucent_compare;
 867         translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
 868
 869         translucent.on_bi.bi_cf_ocs = translucentocs;
 870         rc = config_register_schema ( translucentcfg, translucentocs );
 871         if ( rc ) return rc;
 872
 873         return(overlay_register(&translucent));
 874 }
 875
 876 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
 877 int init_module(int argc, char *argv[]) {
 878         return translucent_initialize();
 879 }
 880 #endif
 881
 882 #endif /* SLAPD_OVER_TRANSLUCENT */