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