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 -1;
 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 -1;
 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         struct ldaprwmap        *rwmap =
 429                         (struct ldaprwmap *)on->on_bi.bi_private;
 430
 431         int                     rc;
 432
 433         if ( op->orr_newSup ) {
 434                 dncookie        dc;
 435                 struct berval   nnewSup = BER_BVNULL;
 436                 struct berval   newSup = BER_BVNULL;
 437
 438                 /*
 439                  * Rewrite the new superior, if defined and required
 440                  */
 441                 dc.rwmap = rwmap;
 442 #ifdef ENABLE_REWRITE
 443                 dc.conn = op->o_conn;
 444                 dc.rs = rs;
 445                 dc.ctx = "newSuperiorDN";
 446 #else
 447                 dc.tofrom = 0;
 448                 dc.normalized = 0;
 449 #endif
 450                 rc = rwm_dn_massage( &dc, op->orr_newSup, &newSup, &nnewSup );
 451                 if ( rc != LDAP_SUCCESS ) {
 452                         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 453                         send_ldap_error( op, rs, rc, "newSuperiorDN massage error" );
 454                         return -1;
 455                 }
 456
 457                 if ( op->orr_newSup->bv_val != newSup.bv_val ) {
 458                         op->o_tmpfree( op->orr_newSup->bv_val, op->o_tmpmemctx );
 459                         op->o_tmpfree( op->orr_nnewSup->bv_val, op->o_tmpmemctx );
 460                         *op->orr_newSup = newSup;
 461                         *op->orr_nnewSup = nnewSup;
 462                 }
 463         }
 464
 465 #ifdef ENABLE_REWRITE
 466         rc = rwm_op_dn_massage( op, rs, "renameDn" );
 467 #else
 468         rc = 1;
 469         rc = rwm_op_dn_massage( op, rs, &rc );
 470 #endif
 471         if ( rc != LDAP_SUCCESS ) {
 472                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 473                 send_ldap_error( op, rs, rc, "renameDn massage error" );
 474                 return -1;
 475         }
 476
 477         /* TODO: rewrite attribute types, values of DN-valued attributes ... */
 478         return SLAP_CB_CONTINUE;
 479 }
 480
 481 static int
 482 rwm_swap_attrs( Operation *op, SlapReply *rs )
 483 {
 484         slap_callback   *cb = op->o_callback;
 485         AttributeName   *an = (AttributeName *)cb->sc_private;
 486
 487         rs->sr_attrs = an;
 488
 489         return SLAP_CB_CONTINUE;
 490 }
 491
 492 static int rwm_freeself( Operation *op, SlapReply *rs )
 493 {
 494         if ( op->o_tag == LDAP_REQ_SEARCH && rs->sr_type == REP_RESULT ) {
 495                 assert( op->o_callback );
 496
 497                 op->o_tmpfree( op->o_callback, op->o_tmpmemctx );
 498                 op->o_callback = NULL;
 499         }
 500
 501         return SLAP_CB_CONTINUE;
 502 }
 503
 504 static int
 505 rwm_search( Operation *op, SlapReply *rs )
 506 {
 507         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 508         struct ldaprwmap        *rwmap =
 509                         (struct ldaprwmap *)on->on_bi.bi_private;
 510
 511         int                     rc;
 512         dncookie                dc;
 513
 514         struct berval           fstr = BER_BVNULL;
 515         Filter                  *f = NULL;
 516
 517         slap_callback           *cb;
 518         AttributeName           *an = NULL;
 519
 520         char                    *text = NULL;
 521
 522 #ifdef ENABLE_REWRITE
 523         rc = rwm_op_dn_massage( op, rs, "searchDn" );
 524 #else
 525         rc = 1;
 526         rc = rwm_op_dn_massage( op, rs, &rc );
 527 #endif
 528         if ( rc != LDAP_SUCCESS ) {
 529                 text = "searchDn massage error";
 530                 goto error_return;
 531         }
 532
 533         /*
 534          * Rewrite the bind dn if needed
 535          */
 536         dc.rwmap = rwmap;
 537 #ifdef ENABLE_REWRITE
 538         dc.conn = op->o_conn;
 539         dc.rs = rs;
 540         dc.ctx = "searchFilterAttrDN";
 541 #else
 542         dc.tofrom = 0;
 543         dc.normalized = 0;
 544 #endif
 545
 546         rc = rwm_filter_map_rewrite( &dc, op->ors_filter, &fstr );
 547         if ( rc != LDAP_SUCCESS ) {
 548                 text = "searchFilter/searchFilterAttrDN massage error";
 549                 goto error_return;
 550         }
 551
 552         f = str2filter_x( op, fstr.bv_val );
 553
 554         if ( f == NULL ) {
 555                 text = "massaged filter parse error";
 556                 goto error_return;
 557         }
 558
 559         if ( !BER_BVISNULL( &op->ors_filterstr ) ) {
 560                 ch_free( op->ors_filterstr.bv_val );
 561         }
 562
 563         if( op->ors_filter ) {
 564                 filter_free_x( op, op->ors_filter );
 565         }
 566
 567         op->ors_filter = f;
 568         op->ors_filterstr = fstr;
 569
 570         rc = rwm_map_attrnames( &rwmap->rwm_at, &rwmap->rwm_oc,
 571                         op->ors_attrs, &an, RWM_MAP );
 572         if ( rc != LDAP_SUCCESS ) {
 573                 text = "attribute list mapping error";
 574                 goto error_return;
 575         }
 576
 577         cb = (slap_callback *) op->o_tmpcalloc( sizeof( slap_callback ),
 578                         1, op->o_tmpmemctx );
 579         if ( cb == NULL ) {
 580                 rc = LDAP_NO_MEMORY;
 581                 goto error_return;
 582         }
 583
 584         cb->sc_response = rwm_swap_attrs;
 585         cb->sc_cleanup = rwm_freeself;
 586         cb->sc_private = (void *)op->ors_attrs;
 587         cb->sc_next = op->o_callback;
 588
 589         op->o_callback = cb;
 590         op->ors_attrs = an;
 591
 592         return SLAP_CB_CONTINUE;
 593
 594 error_return:;
 595         if ( an != NULL ) {
 596                 ch_free( an );
 597         }
 598
 599         if ( f != NULL ) {
 600                 filter_free_x( op, f );
 601         }
 602
 603         if ( !BER_BVISNULL( &fstr ) ) {
 604                 ch_free( fstr.bv_val );
 605         }
 606
 607         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 608         send_ldap_error( op, rs, rc, text );
 609
 610         return -1;
 611
 612 }
 613
 614 static int
 615 rwm_extended( Operation *op, SlapReply *rs )
 616 {
 617         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 618         int                     rc;
 619
 620 #ifdef ENABLE_REWRITE
 621         rc = rwm_op_dn_massage( op, rs, "extendedDn" );
 622 #else
 623         rc = 1;
 624         rc = rwm_op_dn_massage( op, rs, &rc );
 625 #endif
 626         if ( rc != LDAP_SUCCESS ) {
 627                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 628                 send_ldap_error( op, rs, rc, "extendedDn massage error" );
 629                 return -1;
 630         }
 631
 632         /* TODO: rewrite/map extended data ? ... */
 633         return 0;
 634 }
 635
 636 static int
 637 rwm_matched( Operation *op, SlapReply *rs )
 638 {
 639         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 640         struct ldaprwmap        *rwmap =
 641                         (struct ldaprwmap *)on->on_bi.bi_private;
 642
 643         struct berval           dn, mdn;
 644         dncookie                dc;
 645         int                     rc;
 646
 647         if ( rs->sr_matched == NULL ) {
 648                 return SLAP_CB_CONTINUE;
 649         }
 650
 651         dc.rwmap = rwmap;
 652 #ifdef ENABLE_REWRITE
 653         dc.conn = op->o_conn;
 654         dc.rs = rs;
 655         dc.ctx = "matchedDN";
 656 #else
 657         dc.tofrom = 0;
 658         dc.normalized = 0;
 659 #endif
 660         ber_str2bv( rs->sr_matched, 0, 0, &dn );
 661         rc = rwm_dn_massage( &dc, &dn, &mdn, NULL );
 662         if ( rc != LDAP_SUCCESS ) {
 663                 rs->sr_err = rc;
 664                 rs->sr_text = "Rewrite error";
 665                 return 1;
 666         }
 667
 668         if ( mdn.bv_val != dn.bv_val ) {
 669                 if ( rs->sr_flags & REP_MATCHED_MUSTBEFREED ) {
 670                         ch_free( (void *)rs->sr_matched );
 671
 672                 } else {
 673                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 674                 }
 675                 rs->sr_matched = mdn.bv_val;
 676         }
 677
 678         return SLAP_CB_CONTINUE;
 679 }
 680
 681 static int
 682 rwm_attrs( Operation *op, SlapReply *rs, Attribute** a_first )
 683 {
 684         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 685         struct ldaprwmap        *rwmap =
 686                         (struct ldaprwmap *)on->on_bi.bi_private;
 687
 688         dncookie                dc;
 689         int                     rc;
 690         Attribute               **ap;
 691
 692         /*
 693          * Rewrite the dn of the result, if needed
 694          */
 695         dc.rwmap = rwmap;
 696 #ifdef ENABLE_REWRITE
 697         dc.conn = op->o_conn;
 698         dc.rs = NULL;
 699         dc.ctx = "searchAttrDN";
 700 #else
 701         dc.tofrom = 0;
 702         dc.normalized = 0;
 703 #endif
 704
 705         /* FIXME: the entries are in the remote mapping form;
 706          * so we need to select those attributes we are willing
 707          * to return, and remap them accordingly */
 708
 709         /* FIXME: in principle, one could map an attribute
 710          * on top of another, which already exists.
 711          * As such, in the end there might exist more than
 712          * one instance of an attribute.
 713          * We should at least check if this occurs, and issue
 714          * an error (because multiple instances of attrs in
 715          * response are not valid), or merge the values (what
 716          * about duplicate values?) */
 717         for ( ap = a_first; *ap; ) {
 718                 struct ldapmapping      *m;
 719                 int                     drop_missing;
 720                 int                     last;
 721
 722                 if ( rs->sr_opattrs == SLAP_OPATTRS && is_at_operational( (*ap)->a_desc->ad_type ) )
 723                 {
 724                         /* go on */ ;
 725
 726                 } else if ( op->ors_attrs != NULL && !ad_inlist( (*ap)->a_desc, op->ors_attrs ) )
 727                 {
 728                         Attribute       *a;
 729
 730                         a = *ap;
 731                         *ap = (*ap)->a_next;
 732
 733                         attr_free( a );
 734                         continue;
 735                 }
 736
 737                 drop_missing = rwm_mapping( &rwmap->rwm_at,
 738                                 &(*ap)->a_desc->ad_cname, &m, RWM_REMAP );
 739                 if ( drop_missing || ( m != NULL && BER_BVISEMPTY( &m->m_dst ) ) ) {
 740                         Attribute       *a;
 741
 742                         a = *ap;
 743                         *ap = (*ap)->a_next;
 744
 745                         attr_free( a );
 746                         continue;
 747                 }
 748
 749                 for ( last = 0; !BER_BVISNULL( &(*ap)->a_vals[last] ); last++ )
 750                         /* just count */ ;
 751
 752                 if ( last == 0 ) {
 753                         /* empty? for now, we leave it in place */
 754                         goto next_attr;
 755                 }
 756                 last--;
 757
 758                 if ( (*ap)->a_desc == slap_schema.si_ad_objectClass
 759                                 || (*ap)->a_desc == slap_schema.si_ad_structuralObjectClass )
 760                 {
 761                         struct berval   *bv;
 762
 763                         for ( bv = (*ap)->a_vals; !BER_BVISNULL( bv ); bv++ ) {
 764                                 struct berval   mapped;
 765
 766                                 rwm_map( &rwmap->rwm_oc, &bv[0], &mapped, RWM_REMAP );
 767                                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 768                                         ch_free( bv[0].bv_val );
 769                                         BER_BVZERO( &bv[0] );
 770                                         if ( &(*ap)->a_vals[last] > &bv[0] ) {
 771                                                 bv[0] = (*ap)->a_vals[last];
 772                                                 BER_BVZERO( &(*ap)->a_vals[last] );
 773                                         }
 774                                         last--;
 775                                         bv--;
 776
 777                                 } else if ( mapped.bv_val != bv[0].bv_val ) {
 778                                         /*
 779                                          * FIXME: after LBER_FREEing
 780                                          * the value is replaced by
 781                                          * ch_alloc'ed memory
 782                                          */
 783                                         free( bv[0].bv_val );
 784                                         ber_dupbv( &bv[0], &mapped );
 785                                 }
 786                         }
 787
 788                 /*
 789                  * It is necessary to try to rewrite attributes with
 790                  * dn syntax because they might be used in ACLs as
 791                  * members of groups; since ACLs are applied to the
 792                  * rewritten stuff, no dn-based subject clause could
 793                  * be used at the ldap backend side (see
 794                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 795                  * The problem can be overcome by moving the dn-based
 796                  * ACLs to the target directory server, and letting
 797                  * everything pass thru the ldap backend. */
 798                 /* FIXME: handle distinguishedName-like syntaxes, like
 799                  * nameAndOptionalUID */
 800                 } else if ( (*ap)->a_desc->ad_type->sat_syntax ==
 801                                 slap_schema.si_syn_distinguishedName )
 802                 {
 803                         rc = rwm_dnattr_result_rewrite( &dc, (*ap)->a_vals );
 804                         if ( rc != LDAP_SUCCESS ) {
 805                                 Attribute       *a;
 806
 807                                 a = *ap;
 808                                 *ap = (*ap)->a_next;
 809
 810                                 attr_free( a );
 811                                 continue;
 812                         }
 813                 }
 814
 815                 if ( m != NULL ) {
 816                         /* rewrite the attribute description */
 817                         assert( m->m_dst_ad );
 818                         (*ap)->a_desc = m->m_dst_ad;
 819                 }
 820
 821 next_attr:;
 822                 ap = &(*ap)->a_next;
 823         }
 824
 825         return 0;
 826 }
 827
 828 static int
 829 rwm_send_entry( Operation *op, SlapReply *rs )
 830 {
 831         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 832         struct ldaprwmap        *rwmap =
 833                         (struct ldaprwmap *)on->on_bi.bi_private;
 834
 835         Entry                   *e = NULL;
 836         int                     flags;
 837         struct berval           dn = BER_BVNULL,
 838                                 ndn = BER_BVNULL;
 839         dncookie                dc;
 840         int                     rc;
 841
 842         assert( rs->sr_entry );
 843
 844         /*
 845          * Rewrite the dn of the result, if needed
 846          */
 847         dc.rwmap = rwmap;
 848 #ifdef ENABLE_REWRITE
 849         dc.conn = op->o_conn;
 850         dc.rs = NULL;
 851         dc.ctx = "searchResult";
 852 #else
 853         dc.tofrom = 0;
 854         dc.normalized = 0;
 855 #endif
 856
 857         e = rs->sr_entry;
 858         flags = rs->sr_flags;
 859         if ( !( rs->sr_flags & REP_ENTRY_MODIFIABLE ) ) {
 860                 /* FIXME: all we need to duplicate are:
 861                  * - dn
 862                  * - ndn
 863                  * - attributes that are requested
 864                  * - no values if attrsonly is set
 865                  */
 866
 867                 e = entry_dup( e );
 868                 if ( e == NULL ) {
 869                         rc = LDAP_NO_MEMORY;
 870                         goto fail;
 871                 }
 872
 873                 flags |= ( REP_ENTRY_MODIFIABLE | REP_ENTRY_MUSTBEFREED );
 874         }
 875
 876         /*
 877          * Note: this may fail if the target host(s) schema differs
 878          * from the one known to the meta, and a DN with unknown
 879          * attributes is returned.
 880          */
 881         rc = rwm_dn_massage( &dc, &e->e_name, &dn, &ndn );
 882         if ( rc != LDAP_SUCCESS ) {
 883                 goto fail;
 884         }
 885
 886         if ( e->e_name.bv_val != dn.bv_val ) {
 887                 free( e->e_name.bv_val );
 888                 free( e->e_nname.bv_val );
 889
 890                 e->e_name = dn;
 891                 e->e_nname = ndn;
 892         }
 893
 894         /* TODO: map entry attribute types, objectclasses
 895          * and dn-valued attribute values */
 896
 897         /* FIXME: the entries are in the remote mapping form;
 898          * so we need to select those attributes we are willing
 899          * to return, and remap them accordingly */
 900         rwm_attrs( op, rs, &e->e_attrs );
 901
 902         rs->sr_entry = e;
 903         rs->sr_flags = flags;
 904
 905         return SLAP_CB_CONTINUE;
 906
 907 fail:;
 908         if ( !BER_BVISNULL( &dn ) ) {
 909                 ch_free( dn.bv_val );
 910         }
 911
 912         if ( !BER_BVISNULL( &ndn ) ) {
 913                 ch_free( ndn.bv_val );
 914         }
 915
 916         if ( e != NULL && e != rs->sr_entry ) {
 917                 entry_free( e );
 918         }
 919
 920         return rc;
 921 }
 922
 923 static int
 924 rwm_operational( Operation *op, SlapReply *rs )
 925 {
 926         /* FIXME: the entries are in the remote mapping form;
 927          * so we need to select those attributes we are willing
 928          * to return, and remap them accordingly */
 929         if ( rs->sr_operational_attrs ) {
 930                 rwm_attrs( op, rs, &rs->sr_operational_attrs );
 931         }
 932
 933         return SLAP_CB_CONTINUE;
 934 }
 935
 936 static int
 937 rwm_rw_config(
 938     BackendDB   *be,
 939     const char  *fname,
 940     int         lineno,
 941     int         argc,
 942     char        **argv
 943 )
 944 {
 945 #ifdef ENABLE_REWRITE
 946         slap_overinst           *on = (slap_overinst *) be->bd_info;
 947         struct ldaprwmap        *rwmap =
 948                         (struct ldaprwmap *)on->on_bi.bi_private;
 949
 950         return rewrite_parse( rwmap->rwm_rw,
 951                                 fname, lineno, argc, argv );
 952
 953 #else /* !ENABLE_REWRITE */
 954         fprintf( stderr, "%s: line %d: rewrite capabilities "
 955                         "are not enabled\n", fname, lineno );
 956 #endif /* !ENABLE_REWRITE */
 957
 958         return 0;
 959 }
 960
 961 static int
 962 rwm_suffixmassage_config(
 963     BackendDB   *be,
 964     const char  *fname,
 965     int         lineno,
 966     int         argc,
 967     char        **argv
 968 )
 969 {
 970         slap_overinst           *on = (slap_overinst *) be->bd_info;
 971         struct ldaprwmap        *rwmap =
 972                         (struct ldaprwmap *)on->on_bi.bi_private;
 973
 974         struct berval   bvnc, nvnc, pvnc, brnc, nrnc, prnc;
 975 #ifdef ENABLE_REWRITE
 976         int             rc;
 977 #endif /* ENABLE_REWRITE */
 978
 979         /*
 980          * syntax:
 981          *
 982          *      suffixmassage <suffix> <massaged suffix>
 983          *
 984          * the <suffix> field must be defined as a valid suffix
 985          * (or suffixAlias?) for the current database;
 986          * the <massaged suffix> shouldn't have already been
 987          * defined as a valid suffix or suffixAlias for the
 988          * current server
 989          */
 990         if ( argc != 3 ) {
 991                 fprintf( stderr, "%s: line %d: syntax is"
 992                                " \"suffixMassage <suffix>"
 993                                " <massaged suffix>\"\n",
 994                         fname, lineno );
 995                 return 1;
 996         }
 997
 998         ber_str2bv( argv[1], 0, 0, &bvnc );
 999         if ( dnPrettyNormal( NULL, &bvnc, &pvnc, &nvnc, NULL ) != LDAP_SUCCESS ) {
1000                 fprintf( stderr, "%s: line %d: suffix DN %s is invalid\n",
1001                         fname, lineno, bvnc.bv_val );
1002                 return 1;
1003         }
1004
1005         ber_str2bv( argv[2], 0, 0, &brnc );
1006         if ( dnPrettyNormal( NULL, &brnc, &prnc, &nrnc, NULL ) != LDAP_SUCCESS ) {
1007                 fprintf( stderr, "%s: line %d: suffix DN %s is invalid\n",
1008                                 fname, lineno, brnc.bv_val );
1009                 free( nvnc.bv_val );
1010                 free( pvnc.bv_val );
1011                 return 1;
1012         }
1013
1014 #ifdef ENABLE_REWRITE
1015         /*
1016          * The suffix massaging is emulated
1017          * by means of the rewrite capabilities
1018          */
1019         rc = rwm_suffix_massage_config( rwmap->rwm_rw,
1020                         &pvnc, &nvnc, &prnc, &nrnc );
1021         free( nvnc.bv_val );
1022         free( pvnc.bv_val );
1023         free( nrnc.bv_val );
1024         free( prnc.bv_val );
1025
1026         return( rc );
1027
1028 #else /* !ENABLE_REWRITE */
1029         ber_bvarray_add( &rwmap->rwm_suffix_massage, &pvnc );
1030         ber_bvarray_add( &rwmap->rwm_suffix_massage, &nvnc );
1031
1032         ber_bvarray_add( &rwmap->rwm_suffix_massage, &prnc );
1033         ber_bvarray_add( &rwmap->rwm_suffix_massage, &nrnc );
1034 #endif /* !ENABLE_REWRITE */
1035
1036         return 0;
1037 }
1038
1039 static int
1040 rwm_m_config(
1041     BackendDB   *be,
1042     const char  *fname,
1043     int         lineno,
1044     int         argc,
1045     char        **argv
1046 )
1047 {
1048         slap_overinst           *on = (slap_overinst *) be->bd_info;
1049         struct ldaprwmap        *rwmap =
1050                         (struct ldaprwmap *)on->on_bi.bi_private;
1051
1052         /* objectclass/attribute mapping */
1053         return rwm_map_config( &rwmap->rwm_oc,
1054                         &rwmap->rwm_at,
1055                         fname, lineno, argc, argv );
1056 }
1057
1058 static int
1059 rwm_response( Operation *op, SlapReply *rs )
1060 {
1061         int             rc;
1062
1063         if ( op->o_tag == LDAP_REQ_SEARCH && rs->sr_type == REP_SEARCH ) {
1064                 return rwm_send_entry( op, rs );
1065         }
1066
1067         switch( op->o_tag ) {
1068         case LDAP_REQ_SEARCH:
1069                 /* Note: the operation attrs are remapped */
1070                 if ( op->ors_attrs != NULL && op->ors_attrs != rs->sr_attrs )
1071                 {
1072                         ch_free( op->ors_attrs );
1073                         op->ors_attrs = rs->sr_attrs;
1074                 }
1075                 /* fall thru */
1076
1077         case LDAP_REQ_BIND:
1078         case LDAP_REQ_ADD:
1079         case LDAP_REQ_DELETE:
1080         case LDAP_REQ_MODRDN:
1081         case LDAP_REQ_MODIFY:
1082         case LDAP_REQ_COMPARE:
1083         case LDAP_REQ_EXTENDED:
1084                 rc = rwm_matched( op, rs );
1085                 break;
1086
1087         default:
1088                 rc = SLAP_CB_CONTINUE;
1089                 break;
1090         }
1091
1092         return rc;
1093 }
1094
1095 static int
1096 rwm_config(
1097     BackendDB   *be,
1098     const char  *fname,
1099     int         lineno,
1100     int         argc,
1101     char        **argv
1102 )
1103 {
1104         int             rc = 0;
1105         char            *argv0 = NULL;
1106
1107         if ( strncasecmp( argv[ 0 ], "rwm-", STRLENOF( "rwm-" ) ) == 0 ) {
1108                 argv0 = argv[ 0 ];
1109                 argv[ 0 ] = &argv0[ STRLENOF( "rwm-" ) ];
1110         }
1111
1112         if ( strncasecmp( argv[0], "rewrite", STRLENOF("rewrite") ) == 0 ) {
1113                 rc = rwm_rw_config( be, fname, lineno, argc, argv );
1114
1115         } else if ( strcasecmp( argv[0], "map" ) == 0 ) {
1116                 rc = rwm_m_config( be, fname, lineno, argc, argv );
1117
1118         } else if ( strcasecmp( argv[0], "suffixmassage" ) == 0 ) {
1119                 rc = rwm_suffixmassage_config( be, fname, lineno, argc, argv );
1120
1121         } else {
1122                 rc = SLAP_CONF_UNKNOWN;
1123         }
1124
1125         if ( argv0 ) {
1126                 argv[ 0 ] = argv0;
1127         }
1128
1129         return rc;
1130 }
1131
1132 static int
1133 rwm_over_init(
1134         BackendDB *be
1135 )
1136 {
1137         slap_overinst           *on = (slap_overinst *) be->bd_info;
1138         struct ldapmapping      *mapping = NULL;
1139         struct ldaprwmap        *rwmap;
1140
1141         rwmap = (struct ldaprwmap *)ch_malloc(sizeof(struct ldaprwmap));
1142         memset(rwmap, 0, sizeof(struct ldaprwmap));
1143
1144 #ifdef ENABLE_REWRITE
1145         rwmap->rwm_rw = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
1146         if ( rwmap->rwm_rw == NULL ) {
1147                 ch_free( rwmap );
1148                 return -1;
1149         }
1150
1151         {
1152                 char    *rargv[3];
1153
1154                 /* this rewriteContext by default must be null;
1155                  * rules can be added if required */
1156                 rargv[ 0 ] = "rewriteContext";
1157                 rargv[ 1 ] = "searchFilter";
1158                 rargv[ 2 ] = NULL;
1159                 rewrite_parse( rwmap->rwm_rw, "<suffix massage>", 1, 2, rargv );
1160
1161                 rargv[ 0 ] = "rewriteContext";
1162                 rargv[ 1 ] = "default";
1163                 rargv[ 2 ] = NULL;
1164                 rewrite_parse( rwmap->rwm_rw, "<suffix massage>", 2, 2, rargv );
1165         }
1166
1167 #endif /* ENABLE_REWRITE */
1168
1169         if ( rwm_map_init( &rwmap->rwm_oc, &mapping ) != LDAP_SUCCESS ||
1170                         rwm_map_init( &rwmap->rwm_at, &mapping ) != LDAP_SUCCESS )
1171         {
1172                 return 1;
1173         }
1174
1175         on->on_bi.bi_private = (void *)rwmap;
1176
1177         return 0;
1178 }
1179
1180 static int
1181 rwm_destroy(
1182         BackendDB *be
1183 )
1184 {
1185         slap_overinst   *on = (slap_overinst *) be->bd_info;
1186         int             rc = 0;
1187
1188         if ( on->on_bi.bi_private ) {
1189                 struct ldaprwmap        *rwmap =
1190                         (struct ldaprwmap *)on->on_bi.bi_private;
1191
1192 #ifdef ENABLE_REWRITE
1193                 if (rwmap->rwm_rw) {
1194                         rewrite_info_delete( &rwmap->rwm_rw );
1195                 }
1196 #else /* !ENABLE_REWRITE */
1197                 if ( rwmap->rwm_suffix_massage ) {
1198                         ber_bvarray_free( rwmap->rwm_suffix_massage );
1199                 }
1200 #endif /* !ENABLE_REWRITE */
1201
1202                 avl_free( rwmap->rwm_oc.remap, NULL );
1203                 avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
1204                 avl_free( rwmap->rwm_at.remap, NULL );
1205                 avl_free( rwmap->rwm_at.map, rwm_mapping_free );
1206         }
1207
1208         return rc;
1209 }
1210
1211 static slap_overinst rwm = { { NULL } };
1212
1213 int
1214 rwm_init(void)
1215 {
1216         memset( &rwm, 0, sizeof(slap_overinst) );
1217
1218         rwm.on_bi.bi_type = "rwm";
1219         rwm.on_bi.bi_db_init = rwm_over_init;
1220         rwm.on_bi.bi_db_config = rwm_config;
1221         rwm.on_bi.bi_db_destroy = rwm_destroy;
1222
1223         rwm.on_bi.bi_op_bind = rwm_bind;
1224         rwm.on_bi.bi_op_search = rwm_search;
1225         rwm.on_bi.bi_op_compare = rwm_compare;
1226         rwm.on_bi.bi_op_modify = rwm_modify;
1227         rwm.on_bi.bi_op_modrdn = rwm_modrdn;
1228         rwm.on_bi.bi_op_add = rwm_add;
1229         rwm.on_bi.bi_op_delete = rwm_delete;
1230         rwm.on_bi.bi_op_unbind = rwm_unbind;
1231         rwm.on_bi.bi_extended = rwm_extended;
1232         rwm.on_bi.bi_operational = rwm_operational;
1233
1234         rwm.on_response = rwm_response;
1235
1236         return overlay_register( &rwm );
1237 }
1238
1239 #if SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC
1240 int init_module(int argc, char *argv[]) {
1241         return rwm_init();
1242 }
1243 #endif
1244
1245 #endif /* SLAPD_OVER_RWM */