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

   1 /* rwm.c - rewrite/remap operations */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2003-2004 The OpenLDAP Foundation.
   6  * Portions Copyright 2003 Pierangelo Masarati.
   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
  18 #include "portable.h"
  19
  20 #ifdef SLAPD_OVER_RWM
  21
  22 #include <stdio.h>
  23
  24 #include <ac/string.h>
  25
  26 #include "slap.h"
  27 #include "rwm.h"
  28
  29 static int
  30 rwm_op_dn_massage( Operation *op, SlapReply *rs, void *cookie )
  31 {
  32         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
  33         struct ldaprwmap        *rwmap =
  34                         (struct ldaprwmap *)on->on_bi.bi_private;
  35
  36         struct berval           dn = BER_BVNULL,
  37                                 ndn = BER_BVNULL;
  38         int                     rc = 0;
  39         dncookie                dc;
  40
  41         /*
  42          * Rewrite the bind dn if needed
  43          */
  44         dc.rwmap = rwmap;
  45 #ifdef ENABLE_REWRITE
  46         dc.conn = op->o_conn;
  47         dc.rs = rs;
  48         dc.ctx = (char *)cookie;
  49 #else
  50         dc.tofrom = ((int *)cookie)[0];
  51         dc.normalized = 0;
  52 #endif
  53
  54         rc = rwm_dn_massage( &dc, &op->o_req_dn, &dn, &ndn );
  55         if ( rc != LDAP_SUCCESS ) {
  56                 return rc;
  57         }
  58
  59         if ( dn.bv_val == op->o_req_dn.bv_val ) {
  60                 return LDAP_SUCCESS;
  61         }
  62
  63         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
  64         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
  65
  66         op->o_req_dn = dn;
  67         op->o_req_ndn = ndn;
  68
  69         return LDAP_SUCCESS;
  70 }
  71
  72 static int
  73 rwm_add( Operation *op, SlapReply *rs )
  74 {
  75         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
  76         struct ldaprwmap        *rwmap =
  77                         (struct ldaprwmap *)on->on_bi.bi_private;
  78
  79         int                     rc,
  80                                 i,
  81                                 isupdate;
  82         Attribute               **ap = NULL;
  83
  84 #ifdef ENABLE_REWRITE
  85         rc = rwm_op_dn_massage( op, rs, "addDn" );
  86 #else
  87         rc = 1;
  88         rc = rwm_op_dn_massage( op, rs, &rc );
  89 #endif
  90         if ( rc != LDAP_SUCCESS ) {
  91                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
  92                 send_ldap_error( op, rs, rc, "addDn massage error" );
  93                 return -1;
  94         }
  95
  96         /* Count number of attributes in entry */
  97         isupdate = be_shadow_update( op );
  98         for ( i = 0, ap = &op->oq_add.rs_e->e_attrs; *ap; ) {
  99                 struct berval   mapped;
 100                 Attribute       *a;
 101
 102                 if ( !isupdate && (*ap)->a_desc->ad_type->sat_no_user_mod ) {
 103                         goto cleanup_attr;
 104                 }
 105
 106                 rwm_map( &rwmap->rwm_at, &(*ap)->a_desc->ad_cname,
 107                                 &mapped, RWM_MAP );
 108                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 109                         goto cleanup_attr;
 110                 }
 111
 112                 if ( (*ap)->a_desc->ad_type->sat_syntax
 113                                 == slap_schema.si_syn_distinguishedName )
 114                 {
 115                         /*
 116                          * FIXME: rewrite could fail; in this case
 117                          * the operation should give up, right?
 118                          */
 119 #ifdef ENABLE_REWRITE
 120                         rc = rwm_dnattr_rewrite( op, rs, "addDn", (*ap)->a_vals, NULL );
 121 #else
 122                         rc = 1;
 123                         rc = rwm_dnattr_rewrite( op, rs, &rc, (*ap)->a_vals, NULL );
 124 #endif
 125                         if ( rc ) {
 126                                 goto cleanup_attr;
 127                         }
 128                 }
 129
 130                 ap = &(*ap)->a_next;
 131                 continue;
 132
 133 cleanup_attr:;
 134                 /* FIXME: leaking attribute/values? */
 135                 a = *ap;
 136
 137                 *ap = (*ap)->a_next;
 138                 attr_free( a );
 139         }
 140
 141         /* TODO: map attribute types, values of DN-valued attributes ... */
 142         return SLAP_CB_CONTINUE;
 143 }
 144
 145 static int
 146 rwm_bind( Operation *op, SlapReply *rs )
 147 {
 148         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 149         struct ldaprwmap        *rwmap =
 150                         (struct ldaprwmap *)on->on_bi.bi_private;
 151         int                     rc;
 152
 153 #ifdef ENABLE_REWRITE
 154         ( void )rewrite_session_delete( rwmap->rwm_rw, op->o_conn );
 155         ( void )rewrite_session_init( rwmap->rwm_rw, op->o_conn );
 156
 157         rc = rwm_op_dn_massage( op, rs, "bindDn" );
 158 #else
 159         rc = 1;
 160         rc = rwm_op_dn_massage( op, rs, &rc );
 161 #endif
 162         if ( rc != LDAP_SUCCESS ) {
 163                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 164                 send_ldap_error( op, rs, rc, "bindDn massage error" );
 165                 return -1;
 166         }
 167
 168         return SLAP_CB_CONTINUE;
 169 }
 170
 171 static int
 172 rwm_unbind( Operation *op, SlapReply *rs )
 173 {
 174         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 175         struct ldaprwmap        *rwmap =
 176                         (struct ldaprwmap *)on->on_bi.bi_private;
 177
 178 #ifdef ENABLE_REWRITE
 179         rewrite_session_delete( rwmap->rwm_rw, op->o_conn );
 180 #endif
 181
 182         return SLAP_CB_CONTINUE;
 183 }
 184
 185 static int
 186 rwm_compare( Operation *op, SlapReply *rs )
 187 {
 188         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 189         struct ldaprwmap        *rwmap =
 190                         (struct ldaprwmap *)on->on_bi.bi_private;
 191
 192         int                     rc;
 193         struct berval           mapped_at = BER_BVNULL,
 194                                 mapped_vals[2] = { BER_BVNULL, BER_BVNULL };
 195
 196 #ifdef ENABLE_REWRITE
 197         rc = rwm_op_dn_massage( op, rs, "compareDn" );
 198 #else
 199         rc = 1;
 200         rc = rwm_op_dn_massage( op, rs, &rc );
 201 #endif
 202         if ( rc != LDAP_SUCCESS ) {
 203                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 204                 send_ldap_error( op, rs, rc, "compareDn massage error" );
 205                 return -1;
 206         }
 207
 208         /* if the attribute is an objectClass, try to remap its value */
 209         if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass
 210                         || op->orc_ava->aa_desc == slap_schema.si_ad_structuralObjectClass )
 211         {
 212                 rwm_map( &rwmap->rwm_oc, &op->orc_ava->aa_value,
 213                                 &mapped_vals[0], RWM_MAP );
 214                 if ( BER_BVISNULL( &mapped_vals[0] ) || BER_BVISEMPTY( &mapped_vals[0] ) )
 215                 {
 216                         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 217                         send_ldap_error( op, rs, LDAP_OTHER, "compare objectClass map error" );
 218                         return -1;
 219
 220                 } else if ( mapped_vals[0].bv_val != op->orc_ava->aa_value.bv_val ) {
 221                         free( op->orc_ava->aa_value.bv_val );
 222                         op->orc_ava->aa_value = mapped_vals[0];
 223                 }
 224                 mapped_at = op->orc_ava->aa_desc->ad_cname;
 225
 226         } else {
 227                 rwm_map( &rwmap->rwm_at, &op->orc_ava->aa_desc->ad_cname,
 228                                 &mapped_at, RWM_MAP );
 229                 if ( BER_BVISNULL( &mapped_at ) || BER_BVISEMPTY( &mapped_at ) )
 230                 {
 231                         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 232                         send_ldap_error( op, rs, LDAP_OTHER, "compare attributeType map error" );
 233                         return -1;
 234                 }
 235                 if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName )
 236                 {
 237                         mapped_vals[0] = op->orc_ava->aa_value;
 238
 239 #ifdef ENABLE_REWRITE
 240                         rc = rwm_dnattr_rewrite( op, rs, "compareAttrDN", mapped_vals, NULL );
 241 #else
 242                         rc = 1;
 243                         rc = rwm_dnattr_rewrite( op, rs, &rc, mapped_vals, NULL );
 244 #endif
 245
 246                         if ( rc != LDAP_SUCCESS ) {
 247                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 248                                 send_ldap_error( op, rs, rc, "compareAttrDN massage error" );
 249                                 return -1;
 250                         }
 251
 252                         if ( mapped_vals[0].bv_val != op->orc_ava->aa_value.bv_val ) {
 253                                 free( op->orc_ava->aa_value.bv_val );
 254                                 op->orc_ava->aa_value = mapped_vals[0];
 255                         }
 256                 }
 257         }
 258
 259         return SLAP_CB_CONTINUE;
 260 }
 261
 262 static int
 263 rwm_delete( Operation *op, SlapReply *rs )
 264 {
 265         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 266         int                     rc;
 267
 268 #ifdef ENABLE_REWRITE
 269         rc = rwm_op_dn_massage( op, rs, "deleteDn" );
 270 #else
 271         rc = 1;
 272         rc = rwm_op_dn_massage( op, rs, &rc );
 273 #endif
 274         if ( rc != LDAP_SUCCESS ) {
 275                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 276                 send_ldap_error( op, rs, rc, "deleteDn massage error" );
 277                 return rc;
 278         }
 279
 280         return SLAP_CB_CONTINUE;
 281 }
 282
 283 static int
 284 rwm_modify( Operation *op, SlapReply *rs )
 285 {
 286         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 287         struct ldaprwmap        *rwmap =
 288                         (struct ldaprwmap *)on->on_bi.bi_private;
 289
 290         int                     isupdate;
 291         Modifications           **mlp;
 292         int                     rc;
 293
 294 #ifdef ENABLE_REWRITE
 295         rc = rwm_op_dn_massage( op, rs, "modifyDn" );
 296 #else
 297         rc = 1;
 298         rc = rwm_op_dn_massage( op, rs, &rc );
 299 #endif
 300         if ( rc != LDAP_SUCCESS ) {
 301                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 302                 send_ldap_error( op, rs, rc, "modifyDn massage error" );
 303                 return rc;
 304         }
 305
 306         isupdate = be_shadow_update( op );
 307         for ( mlp = &op->oq_modify.rs_modlist; *mlp; ) {
 308                 int             is_oc = 0;
 309
 310                 if ( !isupdate && (*mlp)->sml_desc->ad_type->sat_no_user_mod  ) {
 311                         Modifications   *ml;
 312
 313                         ml = *mlp;
 314                         *mlp = (*mlp)->sml_next;
 315                         slap_mod_free( &ml->sml_mod, 0 );
 316                         free( ml );
 317
 318                         continue;
 319                 }
 320
 321                 if ( (*mlp)->sml_desc == slap_schema.si_ad_objectClass
 322                                 || (*mlp)->sml_desc == slap_schema.si_ad_structuralObjectClass ) {
 323                         is_oc = 1;
 324
 325                 } else {
 326                         struct ldapmapping      *m;
 327                         int                     drop_missing;
 328
 329                         drop_missing = rwm_mapping( &rwmap->rwm_at, &(*mlp)->sml_desc->ad_cname, &m, RWM_MAP );
 330                         if ( drop_missing || ( m != NULL && BER_BVISNULL( &m->m_dst ) ) )
 331                         {
 332                                 Modifications   *ml;
 333
 334                                 ml = *mlp;
 335                                 *mlp = (*mlp)->sml_next;
 336                                 slap_mod_free( &ml->sml_mod, 0 );
 337                                 free( ml );
 338
 339                                 continue;
 340                         }
 341
 342                         if ( m ) {
 343                                 /* use new attribute description */
 344                                 assert( m->m_dst_ad );
 345                                 (*mlp)->sml_desc = m->m_dst_ad;
 346                         }
 347                 }
 348
 349                 if ( (*mlp)->sml_values != NULL ) {
 350                         if ( is_oc ) {
 351                                 int     last, j;
 352
 353                                 for ( last = 0; !BER_BVISNULL( &(*mlp)->sml_values[last] ); last++ )
 354                                         /* count values */ ;
 355                                 last--;
 356
 357                                 for ( j = 0; !BER_BVISNULL( &(*mlp)->sml_values[j] ); j++ ) {
 358                                         struct berval   mapped = BER_BVNULL;
 359
 360                                         rwm_map( &rwmap->rwm_oc,
 361                                                         &(*mlp)->sml_values[j],
 362                                                         &mapped, RWM_MAP );
 363                                         if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 364                                                 /* FIXME: we allow to remove objectClasses as well;
 365                                                  * if the resulting entry is inconsistent, that's
 366                                                  * the relayed database's business...
 367                                                  */
 368 #if 0
 369                                                 Modifications   *ml;
 370
 371                                                 ml = *mlp;
 372                                                 *mlp = (*mlp)->sml_next;
 373                                                 slap_mod_free( &ml->sml_mod, 0 );
 374                                                 free( ml );
 375
 376                                                 continue;
 377 #endif
 378                                                 if ( last > j ) {
 379                                                         (*mlp)->sml_values[j] = (*mlp)->sml_values[last];
 380                                                         BER_BVZERO( &(*mlp)->sml_values[last] );
 381                                                 }
 382                                                 last--;
 383
 384                                         } else {
 385                                                 ch_free( (*mlp)->sml_values[j].bv_val );
 386                                                 ber_dupbv( &(*mlp)->sml_values[j], &mapped );
 387                                         }
 388                                 }
 389
 390                         } else {
 391                                 if ( (*mlp)->sml_desc->ad_type->sat_syntax ==
 392                                                 slap_schema.si_syn_distinguishedName )
 393                                 {
 394 #ifdef ENABLE_REWRITE
 395                                         rc = rwm_dnattr_rewrite( op, rs, "modifyDn",
 396                                                         (*mlp)->sml_values, &(*mlp)->sml_nvalues );
 397 #else
 398                                         rc = 1;
 399                                         rc = rwm_dnattr_rewrite( op, rs, &rc,
 400                                                         (*mlp)->sml_values, &(*mlp)->sml_nvalues );
 401 #endif
 402                                 }
 403
 404                                 if ( rc != LDAP_SUCCESS ) {
 405                                         Modifications   *ml;
 406
 407                                         ml = *mlp;
 408                                         *mlp = (*mlp)->sml_next;
 409                                         slap_mod_free( &ml->sml_mod, 0 );
 410                                         free( ml );
 411
 412                                         continue;
 413                                 }
 414                         }
 415                 }
 416
 417                 mlp = &(*mlp)->sml_next;
 418         }
 419
 420         /* TODO: rewrite attribute types, values of DN-valued attributes ... */
 421         return SLAP_CB_CONTINUE;
 422 }
 423
 424 static int
 425 rwm_modrdn( Operation *op, SlapReply *rs )
 426 {
 427         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 428         int                     rc;
 429
 430 #ifdef ENABLE_REWRITE
 431         rc = rwm_op_dn_massage( op, rs, "renameDn" );
 432 #else
 433         rc = 1;
 434         rc = rwm_op_dn_massage( op, rs, &rc );
 435 #endif
 436         if ( rc != LDAP_SUCCESS ) {
 437                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 438                 send_ldap_error( op, rs, rc, "renameDn massage error" );
 439                 return rc;
 440         }
 441
 442         /* TODO: rewrite attribute types, values of DN-valued attributes ... */
 443         return SLAP_CB_CONTINUE;
 444 }
 445
 446 static int
 447 rwm_swap_attrs( Operation *op, SlapReply *rs )
 448 {
 449         slap_callback   *cb = op->o_callback;
 450         AttributeName   *an = (AttributeName *)cb->sc_private;
 451
 452         rs->sr_attrs = an;
 453
 454         return SLAP_CB_CONTINUE;
 455 }
 456
 457 static int
 458 rwm_search( Operation *op, SlapReply *rs )
 459 {
 460         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 461         struct ldaprwmap        *rwmap =
 462                         (struct ldaprwmap *)on->on_bi.bi_private;
 463
 464         int                     rc;
 465         dncookie                dc;
 466
 467         struct berval           fstr = BER_BVNULL;
 468         Filter                  *f = NULL;
 469
 470         slap_callback           *cb;
 471         AttributeName           *an = NULL;
 472
 473         char                    *text = NULL;
 474
 475 #ifdef ENABLE_REWRITE
 476         rc = rwm_op_dn_massage( op, rs, "searchDn" );
 477 #else
 478         rc = 1;
 479         rc = rwm_op_dn_massage( op, rs, &rc );
 480 #endif
 481         if ( rc != LDAP_SUCCESS ) {
 482                 text = "searchDn massage error";
 483                 goto error_return;
 484         }
 485
 486         /*
 487          * Rewrite the bind dn if needed
 488          */
 489         dc.rwmap = rwmap;
 490 #ifdef ENABLE_REWRITE
 491         dc.conn = op->o_conn;
 492         dc.rs = rs;
 493         dc.ctx = "searchFilterAttrDN";
 494 #else
 495         dc.tofrom = 0;
 496         dc.normalized = 0;
 497 #endif
 498
 499         rc = rwm_filter_map_rewrite( &dc, op->ors_filter, &fstr );
 500         if ( rc != LDAP_SUCCESS ) {
 501                 text = "searchFilter/searchFilterAttrDN massage error";
 502                 goto error_return;
 503         }
 504
 505         f = str2filter_x( op, fstr.bv_val );
 506
 507         if ( f == NULL ) {
 508                 text = "massaged filter parse error";
 509                 goto error_return;
 510         }
 511
 512         if ( !BER_BVISNULL( &op->ors_filterstr ) ) {
 513                 ch_free( op->ors_filterstr.bv_val );
 514         }
 515
 516         if( op->ors_filter ) {
 517                 filter_free_x( op, op->ors_filter );
 518         }
 519
 520         op->ors_filter = f;
 521         op->ors_filterstr = fstr;
 522
 523         rc = rwm_map_attrnames( &rwmap->rwm_at, &rwmap->rwm_oc,
 524                         op->ors_attrs, &an, RWM_MAP );
 525         if ( rc != LDAP_SUCCESS ) {
 526                 text = "attribute list mapping error";
 527                 goto error_return;
 528         }
 529
 530         cb = (slap_callback *)ch_malloc( sizeof( slap_callback ) );
 531         if ( cb == NULL ) {
 532                 rc = LDAP_NO_MEMORY;
 533                 goto error_return;
 534         }
 535
 536         cb->sc_response = rwm_swap_attrs;
 537         cb->sc_cleanup = NULL;
 538         cb->sc_private = (void *)op->ors_attrs;
 539         cb->sc_next = op->o_callback;
 540
 541         op->o_callback = cb;
 542         op->ors_attrs = an;
 543
 544         /* TODO: rewrite/map filter & attrs */
 545         return SLAP_CB_CONTINUE;
 546
 547 error_return:;
 548         if ( an != NULL ) {
 549                 ch_free( an );
 550         }
 551
 552         if ( f != NULL ) {
 553                 filter_free_x( op, f );
 554         }
 555
 556         if ( !BER_BVISNULL( &fstr ) ) {
 557                 ch_free( fstr.bv_val );
 558         }
 559
 560         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 561         send_ldap_error( op, rs, rc, text );
 562
 563         return 1;
 564
 565 }
 566
 567 static int
 568 rwm_extended( Operation *op, SlapReply *rs )
 569 {
 570         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 571         int                     rc;
 572
 573 #ifdef ENABLE_REWRITE
 574         rc = rwm_op_dn_massage( op, rs, "extendedDn" );
 575 #else
 576         rc = 1;
 577         rc = rwm_op_dn_massage( op, rs, &rc );
 578 #endif
 579         if ( rc != LDAP_SUCCESS ) {
 580                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 581                 send_ldap_error( op, rs, rc, "extendedDn massage error" );
 582                 return rc;
 583         }
 584
 585         /* TODO: rewrite/map extended data ? ... */
 586         return 0;
 587 }
 588
 589 static int
 590 rwm_matched( Operation *op, SlapReply *rs )
 591 {
 592         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 593         struct ldaprwmap        *rwmap =
 594                         (struct ldaprwmap *)on->on_bi.bi_private;
 595
 596         struct berval           dn, mdn;
 597         dncookie                dc;
 598         int                     rc;
 599
 600         if ( rs->sr_matched == NULL ) {
 601                 return SLAP_CB_CONTINUE;
 602         }
 603
 604         dc.rwmap = rwmap;
 605 #ifdef ENABLE_REWRITE
 606         dc.conn = op->o_conn;
 607         dc.rs = rs;
 608         dc.ctx = "matchedDN";
 609 #else
 610         dc.tofrom = 0;
 611         dc.normalized = 0;
 612 #endif
 613         ber_str2bv( rs->sr_matched, 0, 0, &dn );
 614         rc = rwm_dn_massage( &dc, &dn, &mdn, NULL );
 615         if ( rc != LDAP_SUCCESS ) {
 616                 rs->sr_err = rc;
 617                 rs->sr_text = "Rewrite error";
 618                 return 1;
 619         }
 620
 621         if ( mdn.bv_val != dn.bv_val ) {
 622                 if ( rs->sr_flags & REP_MATCHED_MUSTBEFREED ) {
 623                         ch_free( (void *)rs->sr_matched );
 624
 625                 } else {
 626                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 627                 }
 628                 rs->sr_matched = mdn.bv_val;
 629         }
 630
 631         return SLAP_CB_CONTINUE;
 632 }
 633
 634 static int
 635 rwm_send_entry( Operation *op, SlapReply *rs )
 636 {
 637         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 638         struct ldaprwmap        *rwmap =
 639                         (struct ldaprwmap *)on->on_bi.bi_private;
 640
 641         Entry           *e = NULL;
 642         int             flags;
 643         struct berval   dn = BER_BVNULL,
 644                         ndn = BER_BVNULL;
 645         dncookie        dc;
 646         int             rc;
 647         Attribute       **ap;
 648
 649         assert( rs->sr_entry );
 650
 651         e = rs->sr_entry;
 652
 653         /*
 654          * Rewrite the dn of the result, if needed
 655          */
 656         dc.rwmap = rwmap;
 657 #ifdef ENABLE_REWRITE
 658         dc.conn = op->o_conn;
 659         dc.rs = NULL;
 660         dc.ctx = "searchResult";
 661 #else
 662         dc.tofrom = 0;
 663         dc.normalized = 0;
 664 #endif
 665
 666         flags = rs->sr_flags;
 667
 668         if ( !( rs->sr_flags & REP_ENTRY_MODIFIABLE ) ) {
 669                 /* FIXME: all we need to duplicate are:
 670                  * - dn
 671                  * - ndn
 672                  * - attributes that are requested
 673                  * - no values if attrsonly is set
 674                  */
 675
 676                 e = entry_dup( e );
 677                 if ( e == NULL ) {
 678                         rc = LDAP_NO_MEMORY;
 679                         goto fail;
 680                 }
 681
 682                 flags |= ( REP_ENTRY_MODIFIABLE | REP_ENTRY_MUSTBEFREED );
 683         }
 684
 685         /*
 686          * Note: this may fail if the target host(s) schema differs
 687          * from the one known to the meta, and a DN with unknown
 688          * attributes is returned.
 689          */
 690         rc = rwm_dn_massage( &dc, &e->e_name, &dn, &ndn );
 691         if ( rc != LDAP_SUCCESS ) {
 692                 goto fail;
 693         }
 694
 695         if ( e->e_name.bv_val != dn.bv_val ) {
 696                 free( e->e_name.bv_val );
 697                 free( e->e_nname.bv_val );
 698
 699                 e->e_name = dn;
 700                 e->e_nname = ndn;
 701         }
 702
 703         /* TODO: map entry attribute types, objectclasses
 704          * and dn-valued attribute values */
 705
 706         /* FIXME: the entries are in the remote mapping form;
 707          * so we need to select those attributes we are willing
 708          * to return, and remap them accordingly */
 709
 710         for ( ap = &e->e_attrs; *ap; ) {
 711                 struct ldapmapping      *m;
 712                 int                     drop_missing;
 713                 int                     last;
 714
 715                 if ( op->ors_attrs != NULL && !ad_inlist( (*ap)->a_desc, op->ors_attrs ) ) {
 716                         Attribute       *a;
 717
 718                         a = *ap;
 719                         *ap = (*ap)->a_next;
 720
 721                         attr_free( a );
 722                         continue;
 723                 }
 724
 725                 drop_missing = rwm_mapping( &rwmap->rwm_at,
 726                                 &(*ap)->a_desc->ad_cname, &m, RWM_REMAP );
 727                 if ( drop_missing || ( m != NULL && BER_BVISEMPTY( &m->m_dst ) ) ) {
 728                         Attribute       *a;
 729
 730                         a = *ap;
 731                         *ap = (*ap)->a_next;
 732
 733                         attr_free( a );
 734                         continue;
 735                 }
 736
 737                 /* no subschemaSubentry */
 738                 if ( (*ap)->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 739
 740                         /*
 741                          * We eat target's subschemaSubentry because
 742                          * a search for this value is likely not
 743                          * to resolve to the appropriate backend;
 744                          * later, the local subschemaSubentry is
 745                          * added.
 746                          */
 747                         Attribute       *a;
 748
 749                         a = *ap;
 750                         *ap = (*ap)->a_next;
 751
 752                         attr_free( a );
 753                         continue;
 754                 }
 755
 756                 for ( last = 0; !BER_BVISNULL( &(*ap)->a_vals[last] ); last++ )
 757                         /* just count */ ;
 758
 759                 if ( last == 0 ) {
 760                         /* empty? for now, we leave it in place */
 761                         goto next_attr;
 762                 }
 763                 last--;
 764
 765                 if ( (*ap)->a_desc == slap_schema.si_ad_objectClass
 766                                 || (*ap)->a_desc == slap_schema.si_ad_structuralObjectClass )
 767                 {
 768                         struct berval   *bv;
 769
 770                         for ( bv = (*ap)->a_vals; !BER_BVISNULL( bv ); bv++ ) {
 771                                 struct berval   mapped;
 772
 773                                 rwm_map( &rwmap->rwm_oc, &bv[0], &mapped, RWM_REMAP );
 774                                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 775                                         ch_free( bv[0].bv_val );
 776                                         BER_BVZERO( &bv[0] );
 777                                         if ( &(*ap)->a_vals[last] > &bv[0] ) {
 778                                                 bv[0] = (*ap)->a_vals[last];
 779                                                 BER_BVZERO( &(*ap)->a_vals[last] );
 780                                         }
 781                                         last--;
 782                                         bv--;
 783
 784                                 } else if ( mapped.bv_val != bv[0].bv_val ) {
 785                                         /*
 786                                          * FIXME: after LBER_FREEing
 787                                          * the value is replaced by
 788                                          * ch_alloc'ed memory
 789                                          */
 790                                         free( bv[0].bv_val );
 791                                         ber_dupbv( &bv[0], &mapped );
 792                                 }
 793                         }
 794
 795                 /*
 796                  * It is necessary to try to rewrite attributes with
 797                  * dn syntax because they might be used in ACLs as
 798                  * members of groups; since ACLs are applied to the
 799                  * rewritten stuff, no dn-based subject clause could
 800                  * be used at the ldap backend side (see
 801                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 802                  * The problem can be overcome by moving the dn-based
 803                  * ACLs to the target directory server, and letting
 804                  * everything pass thru the ldap backend.
 805                  */
 806                 } else if ( (*ap)->a_desc->ad_type->sat_syntax ==
 807                                 slap_schema.si_syn_distinguishedName )
 808                 {
 809                         rc = rwm_dnattr_result_rewrite( &dc, (*ap)->a_vals );
 810                         if ( rc != LDAP_SUCCESS ) {
 811                                 Attribute       *a;
 812
 813                                 a = *ap;
 814                                 *ap = (*ap)->a_next;
 815
 816                                 attr_free( a );
 817                                 continue;
 818                         }
 819                 }
 820
 821                 if ( m != NULL ) {
 822                         /* rewrite the attribute description */
 823                         assert( m->m_dst_ad );
 824                         (*ap)->a_desc = m->m_dst_ad;
 825                 }
 826
 827 next_attr:;
 828                 ap = &(*ap)->a_next;
 829         }
 830
 831
 832         rs->sr_entry = e;
 833         rs->sr_flags = flags;
 834
 835         return SLAP_CB_CONTINUE;
 836
 837 fail:;
 838         if ( !BER_BVISNULL( &dn ) ) {
 839                 ch_free( dn.bv_val );
 840         }
 841
 842         if ( !BER_BVISNULL( &ndn ) ) {
 843                 ch_free( ndn.bv_val );
 844         }
 845
 846         if ( e != NULL && e != rs->sr_entry ) {
 847                 entry_free( e );
 848         }
 849
 850         return rc;
 851 }
 852
 853 static int
 854 rwm_rw_config(
 855     BackendDB   *be,
 856     const char  *fname,
 857     int         lineno,
 858     int         argc,
 859     char        **argv
 860 )
 861 {
 862 #ifdef ENABLE_REWRITE
 863         slap_overinst           *on = (slap_overinst *) be->bd_info;
 864         struct ldaprwmap        *rwmap =
 865                         (struct ldaprwmap *)on->on_bi.bi_private;
 866
 867         return rewrite_parse( rwmap->rwm_rw,
 868                                 fname, lineno, argc, argv );
 869
 870 #else /* !ENABLE_REWRITE */
 871         fprintf( stderr, "%s: line %d: rewrite capabilities "
 872                         "are not enabled\n", fname, lineno );
 873 #endif /* !ENABLE_REWRITE */
 874
 875         return 0;
 876 }
 877
 878 static int
 879 rwm_suffixmassage_config(
 880     BackendDB   *be,
 881     const char  *fname,
 882     int         lineno,
 883     int         argc,
 884     char        **argv
 885 )
 886 {
 887         slap_overinst           *on = (slap_overinst *) be->bd_info;
 888         struct ldaprwmap        *rwmap =
 889                         (struct ldaprwmap *)on->on_bi.bi_private;
 890
 891         struct berval   bvnc, nvnc, pvnc, brnc, nrnc, prnc;
 892 #ifdef ENABLE_REWRITE
 893         int             rc;
 894 #endif /* ENABLE_REWRITE */
 895
 896         /*
 897          * syntax:
 898          *
 899          *      suffixmassage <suffix> <massaged suffix>
 900          *
 901          * the <suffix> field must be defined as a valid suffix
 902          * (or suffixAlias?) for the current database;
 903          * the <massaged suffix> shouldn't have already been
 904          * defined as a valid suffix or suffixAlias for the
 905          * current server
 906          */
 907         if ( argc != 3 ) {
 908                 fprintf( stderr, "%s: line %d: syntax is"
 909                                " \"suffixMassage <suffix>"
 910                                " <massaged suffix>\"\n",
 911                         fname, lineno );
 912                 return 1;
 913         }
 914
 915         ber_str2bv( argv[1], 0, 0, &bvnc );
 916         if ( dnPrettyNormal( NULL, &bvnc, &pvnc, &nvnc, NULL ) != LDAP_SUCCESS ) {
 917                 fprintf( stderr, "%s: line %d: suffix DN %s is invalid\n",
 918                         fname, lineno, bvnc.bv_val );
 919                 return 1;
 920         }
 921
 922         ber_str2bv( argv[2], 0, 0, &brnc );
 923         if ( dnPrettyNormal( NULL, &brnc, &prnc, &nrnc, NULL ) != LDAP_SUCCESS ) {
 924                 fprintf( stderr, "%s: line %d: suffix DN %s is invalid\n",
 925                                 fname, lineno, brnc.bv_val );
 926                 free( nvnc.bv_val );
 927                 free( pvnc.bv_val );
 928                 return 1;
 929         }
 930
 931 #ifdef ENABLE_REWRITE
 932         /*
 933          * The suffix massaging is emulated
 934          * by means of the rewrite capabilities
 935          */
 936         rc = rwm_suffix_massage_config( rwmap->rwm_rw,
 937                         &pvnc, &nvnc, &prnc, &nrnc );
 938         free( nvnc.bv_val );
 939         free( pvnc.bv_val );
 940         free( nrnc.bv_val );
 941         free( prnc.bv_val );
 942
 943         return( rc );
 944
 945 #else /* !ENABLE_REWRITE */
 946         ber_bvarray_add( &rwmap->rwm_suffix_massage, &pvnc );
 947         ber_bvarray_add( &rwmap->rwm_suffix_massage, &nvnc );
 948
 949         ber_bvarray_add( &rwmap->rwm_suffix_massage, &prnc );
 950         ber_bvarray_add( &rwmap->rwm_suffix_massage, &nrnc );
 951 #endif /* !ENABLE_REWRITE */
 952
 953         return 0;
 954 }
 955
 956 static int
 957 rwm_m_config(
 958     BackendDB   *be,
 959     const char  *fname,
 960     int         lineno,
 961     int         argc,
 962     char        **argv
 963 )
 964 {
 965         slap_overinst           *on = (slap_overinst *) be->bd_info;
 966         struct ldaprwmap        *rwmap =
 967                         (struct ldaprwmap *)on->on_bi.bi_private;
 968
 969         /* objectclass/attribute mapping */
 970         return rwm_map_config( &rwmap->rwm_oc,
 971                         &rwmap->rwm_at,
 972                         fname, lineno, argc, argv );
 973 }
 974
 975 static int
 976 rwm_response( Operation *op, SlapReply *rs )
 977 {
 978         int             rc;
 979
 980         if ( op->o_tag == LDAP_REQ_SEARCH && rs->sr_type == REP_SEARCH ) {
 981                 return rwm_send_entry( op, rs );
 982         }
 983
 984         switch( op->o_tag ) {
 985         case LDAP_REQ_SEARCH:
 986                 /* Note: the operation attrs are remapped */
 987                 if ( op->ors_attrs != NULL && op->ors_attrs != rs->sr_attrs )
 988                 {
 989                         ch_free( op->ors_attrs );
 990                         op->ors_attrs = rs->sr_attrs;
 991                 }
 992                 /* fall thru */
 993
 994         case LDAP_REQ_BIND:
 995         case LDAP_REQ_ADD:
 996         case LDAP_REQ_DELETE:
 997         case LDAP_REQ_MODRDN:
 998         case LDAP_REQ_MODIFY:
 999         case LDAP_REQ_COMPARE:
1000         case LDAP_REQ_EXTENDED:
1001                 rc = rwm_matched( op, rs );
1002                 break;
1003
1004         default:
1005                 rc = SLAP_CB_CONTINUE;
1006                 break;
1007         }
1008
1009         return rc;
1010 }
1011
1012 static int
1013 rwm_config(
1014     BackendDB   *be,
1015     const char  *fname,
1016     int         lineno,
1017     int         argc,
1018     char        **argv
1019 )
1020 {
1021         int             rc = 0;
1022         char            *argv0 = NULL;
1023
1024         if ( strncasecmp( argv[ 0 ], "rwm-", STRLENOF( "rwm-" ) ) == 0 ) {
1025                 argv0 = argv[ 0 ];
1026                 argv[ 0 ] = &argv0[ STRLENOF( "rwm-" ) ];
1027         }
1028
1029         if ( strncasecmp( argv[0], "rewrite", STRLENOF("rewrite") ) == 0 ) {
1030                 rc = rwm_rw_config( be, fname, lineno, argc, argv );
1031
1032         } else if ( strcasecmp( argv[0], "map" ) == 0 ) {
1033                 rc = rwm_m_config( be, fname, lineno, argc, argv );
1034
1035         } else if ( strcasecmp( argv[0], "suffixmassage" ) == 0 ) {
1036                 rc = rwm_suffixmassage_config( be, fname, lineno, argc, argv );
1037
1038         } else {
1039                 rc = SLAP_CONF_UNKNOWN;
1040         }
1041
1042         if ( argv0 ) {
1043                 argv[ 0 ] = argv0;
1044         }
1045
1046         return rc;
1047 }
1048
1049 static int
1050 rwm_over_init(
1051         BackendDB *be
1052 )
1053 {
1054         slap_overinst           *on = (slap_overinst *) be->bd_info;
1055         struct ldapmapping      *mapping = NULL;
1056         struct ldaprwmap        *rwmap;
1057
1058         rwmap = (struct ldaprwmap *)ch_malloc(sizeof(struct ldaprwmap));
1059         memset(rwmap, 0, sizeof(struct ldaprwmap));
1060
1061 #ifdef ENABLE_REWRITE
1062         rwmap->rwm_rw = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
1063         if ( rwmap->rwm_rw == NULL ) {
1064                 ch_free( rwmap );
1065                 return -1;
1066         }
1067
1068         {
1069                 char    *rargv[3];
1070
1071                 /* this rewriteContext by default must be null;
1072                  * rules can be added if required */
1073                 rargv[ 0 ] = "rewriteContext";
1074                 rargv[ 1 ] = "searchFilter";
1075                 rargv[ 2 ] = NULL;
1076                 rewrite_parse( rwmap->rwm_rw, "<suffix massage>", 1, 2, rargv );
1077
1078                 rargv[ 0 ] = "rewriteContext";
1079                 rargv[ 1 ] = "default";
1080                 rargv[ 2 ] = NULL;
1081                 rewrite_parse( rwmap->rwm_rw, "<suffix massage>", 2, 2, rargv );
1082         }
1083
1084 #endif /* ENABLE_REWRITE */
1085
1086         if ( rwm_map_init( &rwmap->rwm_oc, &mapping ) != LDAP_SUCCESS ||
1087                         rwm_map_init( &rwmap->rwm_at, &mapping ) != LDAP_SUCCESS )
1088         {
1089                 return 1;
1090         }
1091
1092         on->on_bi.bi_private = (void *)rwmap;
1093
1094         return 0;
1095 }
1096
1097 static int
1098 rwm_destroy(
1099         BackendDB *be
1100 )
1101 {
1102         slap_overinst   *on = (slap_overinst *) be->bd_info;
1103         int             rc = 0;
1104
1105         if ( on->on_bi.bi_private ) {
1106                 struct ldaprwmap        *rwmap =
1107                         (struct ldaprwmap *)on->on_bi.bi_private;
1108
1109 #ifdef ENABLE_REWRITE
1110                 if (rwmap->rwm_rw) {
1111                         rewrite_info_delete( &rwmap->rwm_rw );
1112                 }
1113 #else /* !ENABLE_REWRITE */
1114                 if ( rwmap->rwm_suffix_massage ) {
1115                         ber_bvarray_free( rwmap->rwm_suffix_massage );
1116                 }
1117 #endif /* !ENABLE_REWRITE */
1118
1119                 avl_free( rwmap->rwm_oc.remap, NULL );
1120                 avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
1121                 avl_free( rwmap->rwm_at.remap, NULL );
1122                 avl_free( rwmap->rwm_at.map, rwm_mapping_free );
1123         }
1124
1125         return rc;
1126 }
1127
1128 static slap_overinst rwm = { { NULL } };
1129
1130 int
1131 rwm_init(void)
1132 {
1133         memset( &rwm, 0, sizeof(slap_overinst) );
1134
1135         rwm.on_bi.bi_type = "rwm";
1136         rwm.on_bi.bi_db_init = rwm_over_init;
1137         rwm.on_bi.bi_db_config = rwm_config;
1138         rwm.on_bi.bi_db_destroy = rwm_destroy;
1139
1140         rwm.on_bi.bi_op_bind = rwm_bind;
1141         rwm.on_bi.bi_op_search = rwm_search;
1142         rwm.on_bi.bi_op_compare = rwm_compare;
1143         rwm.on_bi.bi_op_modify = rwm_modify;
1144         rwm.on_bi.bi_op_modrdn = rwm_modrdn;
1145         rwm.on_bi.bi_op_add = rwm_add;
1146         rwm.on_bi.bi_op_delete = rwm_delete;
1147         rwm.on_bi.bi_op_unbind = rwm_unbind;
1148         rwm.on_bi.bi_extended = rwm_extended;
1149
1150         rwm.on_response = rwm_response;
1151
1152         return overlay_register( &rwm );
1153 }
1154
1155 #if SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC
1156 int init_module(int argc, char *argv[]) {
1157         return rwm_init();
1158 }
1159 #endif
1160
1161 #endif /* SLAPD_OVER_RWM */