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 2003-2009 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 "config.h"
  28 #include "lutil.h"
  29 #include "rwm.h"
  30
  31 typedef struct rwm_op_state {
  32         ber_tag_t r_tag;
  33         struct berval ro_dn;
  34         struct berval ro_ndn;
  35         struct berval r_dn;
  36         struct berval r_ndn;
  37         AttributeName *mapped_attrs;
  38         OpRequest o_request;
  39 } rwm_op_state;
  40
  41 typedef struct rwm_op_cb {
  42         slap_callback cb;
  43         rwm_op_state ros;
  44 } rwm_op_cb;
  45
  46 static int
  47 rwm_db_destroy( BackendDB *be, ConfigReply *cr );
  48
  49 static int
  50 rwm_send_entry( Operation *op, SlapReply *rs );
  51
  52 static void
  53 rwm_op_rollback( Operation *op, SlapReply *rs, rwm_op_state *ros )
  54 {
  55         if ( !BER_BVISNULL( &ros->ro_dn ) ) {
  56                 op->o_req_dn = ros->ro_dn;
  57         }
  58         if ( !BER_BVISNULL( &ros->ro_ndn ) ) {
  59                 op->o_req_ndn = ros->ro_ndn;
  60         }
  61
  62         if ( !BER_BVISNULL( &ros->r_dn )
  63                 && ros->r_dn.bv_val != ros->ro_dn.bv_val )
  64         {
  65                 assert( ros->r_dn.bv_val != ros->r_ndn.bv_val );
  66                 ch_free( ros->r_dn.bv_val );
  67                 BER_BVZERO( &ros->r_dn );
  68         }
  69
  70         if ( !BER_BVISNULL( &ros->r_ndn )
  71                 && ros->r_ndn.bv_val != ros->ro_ndn.bv_val )
  72         {
  73                 ch_free( ros->r_ndn.bv_val );
  74                 BER_BVZERO( &ros->r_ndn );
  75         }
  76
  77         BER_BVZERO( &ros->ro_dn );
  78         BER_BVZERO( &ros->ro_ndn );
  79
  80         switch( ros->r_tag ) {
  81         case LDAP_REQ_COMPARE:
  82                 if ( op->orc_ava->aa_value.bv_val != ros->orc_ava->aa_value.bv_val )
  83                         op->o_tmpfree( op->orc_ava->aa_value.bv_val, op->o_tmpmemctx );
  84                 op->orc_ava = ros->orc_ava;
  85                 break;
  86         case LDAP_REQ_MODIFY:
  87                 slap_mods_free( op->orm_modlist, 1 );
  88                 op->orm_modlist = ros->orm_modlist;
  89                 break;
  90         case LDAP_REQ_MODRDN:
  91                 if ( op->orr_newSup != ros->orr_newSup ) {
  92                         ch_free( op->orr_newSup->bv_val );
  93                         ch_free( op->orr_nnewSup->bv_val );
  94                         op->o_tmpfree( op->orr_newSup, op->o_tmpmemctx );
  95                         op->o_tmpfree( op->orr_nnewSup, op->o_tmpmemctx );
  96                         op->orr_newSup = ros->orr_newSup;
  97                         op->orr_nnewSup = ros->orr_nnewSup;
  98                 }
  99                 if ( op->orr_newrdn.bv_val != ros->orr_newrdn.bv_val ) {
 100                         ch_free( op->orr_newrdn.bv_val );
 101                         ch_free( op->orr_nnewrdn.bv_val );
 102                         op->orr_newrdn = ros->orr_newrdn;
 103                         op->orr_nnewrdn = ros->orr_nnewrdn;
 104                 }
 105                 break;
 106         case LDAP_REQ_SEARCH:
 107                 ch_free( ros->mapped_attrs );
 108                 filter_free_x( op, op->ors_filter, 1 );
 109                 ch_free( op->ors_filterstr.bv_val );
 110                 op->ors_attrs = ros->ors_attrs;
 111                 op->ors_filter = ros->ors_filter;
 112                 op->ors_filterstr = ros->ors_filterstr;
 113                 break;
 114         case LDAP_REQ_EXTENDED:
 115                 if ( op->ore_reqdata != ros->ore_reqdata ) {
 116                         ber_bvfree( op->ore_reqdata );
 117                         op->ore_reqdata = ros->ore_reqdata;
 118                 }
 119                 break;
 120         case LDAP_REQ_BIND:
 121                 if ( rs->sr_err == LDAP_SUCCESS ) {
 122 #if 0
 123                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 124                         /* too late, c_mutex released */
 125                         fprintf( stderr, "*** DN: \"%s\" => \"%s\"\n",
 126                                 op->o_conn->c_ndn.bv_val,
 127                                 op->o_req_ndn.bv_val );
 128                         ber_bvreplace( &op->o_conn->c_ndn,
 129                                 &op->o_req_ndn );
 130                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 131 #endif
 132                 }
 133                 break;
 134         default:        break;
 135         }
 136 }
 137
 138 static int
 139 rwm_op_cleanup( Operation *op, SlapReply *rs )
 140 {
 141         slap_callback   *cb = op->o_callback;
 142         rwm_op_state *ros = cb->sc_private;
 143
 144         if ( rs->sr_type == REP_RESULT || rs->sr_type == REP_EXTENDED ||
 145                 op->o_abandon || rs->sr_err == SLAPD_ABANDON )
 146         {
 147                 rwm_op_rollback( op, rs, ros );
 148
 149                 op->o_callback = op->o_callback->sc_next;
 150                 op->o_tmpfree( cb, op->o_tmpmemctx );
 151         }
 152
 153         return SLAP_CB_CONTINUE;
 154 }
 155
 156 static rwm_op_cb *
 157 rwm_callback_get( Operation *op, SlapReply *rs )
 158 {
 159         rwm_op_cb       *roc = NULL;
 160
 161         roc = op->o_tmpalloc( sizeof( struct rwm_op_cb ), op->o_tmpmemctx );
 162         roc->cb.sc_cleanup = rwm_op_cleanup;
 163         roc->cb.sc_response = NULL;
 164         roc->cb.sc_next = op->o_callback;
 165         roc->cb.sc_private = &roc->ros;
 166         roc->ros.r_tag = op->o_tag;
 167         roc->ros.ro_dn = op->o_req_dn;
 168         roc->ros.ro_ndn = op->o_req_ndn;
 169         roc->ros.o_request = op->o_request;
 170         BER_BVZERO( &roc->ros.r_dn );
 171         BER_BVZERO( &roc->ros.r_ndn );
 172
 173         return roc;
 174 }
 175
 176
 177 static int
 178 rwm_op_dn_massage( Operation *op, SlapReply *rs, void *cookie,
 179         rwm_op_state *ros )
 180 {
 181         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 182         struct ldaprwmap        *rwmap =
 183                         (struct ldaprwmap *)on->on_bi.bi_private;
 184
 185         struct berval           dn = BER_BVNULL,
 186                                 ndn = BER_BVNULL;
 187         int                     rc = 0;
 188         dncookie                dc;
 189
 190         /*
 191          * Rewrite the dn if needed
 192          */
 193         dc.rwmap = rwmap;
 194         dc.conn = op->o_conn;
 195         dc.rs = rs;
 196         dc.ctx = (char *)cookie;
 197
 198         /* NOTE: in those cases where only the ndn is available,
 199          * and the caller sets op->o_req_dn = op->o_req_ndn,
 200          * only rewrite the op->o_req_ndn and use it as
 201          * op->o_req_dn as well */
 202         ndn = op->o_req_ndn;
 203         if ( op->o_req_dn.bv_val != op->o_req_ndn.bv_val ) {
 204                 dn = op->o_req_dn;
 205                 rc = rwm_dn_massage_pretty_normalize( &dc, &op->o_req_dn, &dn, &ndn );
 206         } else {
 207                 rc = rwm_dn_massage_normalize( &dc, &op->o_req_ndn, &ndn );
 208         }
 209
 210         if ( rc != LDAP_SUCCESS ) {
 211                 return rc;
 212         }
 213
 214         if ( ( op->o_req_dn.bv_val != op->o_req_ndn.bv_val && dn.bv_val == op->o_req_dn.bv_val )
 215                         || ndn.bv_val == op->o_req_ndn.bv_val )
 216         {
 217                 return LDAP_SUCCESS;
 218         }
 219
 220         if ( op->o_req_dn.bv_val != op->o_req_ndn.bv_val ) {
 221                 op->o_req_dn = dn;
 222                 assert( BER_BVISNULL( &ros->r_dn ) );
 223                 ros->r_dn = dn;
 224         } else {
 225                 op->o_req_dn = ndn;
 226         }
 227         op->o_req_ndn = ndn;
 228         assert( BER_BVISNULL( &ros->r_ndn ) );
 229         ros->r_ndn = ndn;
 230
 231         return LDAP_SUCCESS;
 232 }
 233
 234 static int
 235 rwm_op_add( Operation *op, SlapReply *rs )
 236 {
 237         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 238         struct ldaprwmap        *rwmap =
 239                         (struct ldaprwmap *)on->on_bi.bi_private;
 240
 241         int                     rc,
 242                                 i;
 243         Attribute               **ap = NULL;
 244         char                    *olddn = op->o_req_dn.bv_val;
 245         int                     isupdate;
 246
 247         rwm_op_cb               *roc = rwm_callback_get( op, rs );
 248
 249         rc = rwm_op_dn_massage( op, rs, "addDN", &roc->ros );
 250         if ( rc != LDAP_SUCCESS ) {
 251                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 252                 send_ldap_error( op, rs, rc, "addDN massage error" );
 253                 return -1;
 254         }
 255
 256         if ( olddn != op->o_req_dn.bv_val ) {
 257                 ber_bvreplace( &op->ora_e->e_name, &op->o_req_dn );
 258                 ber_bvreplace( &op->ora_e->e_nname, &op->o_req_ndn );
 259         }
 260
 261         /* Count number of attributes in entry */
 262         isupdate = be_shadow_update( op );
 263         for ( i = 0, ap = &op->oq_add.rs_e->e_attrs; *ap; ) {
 264                 Attribute       *a;
 265
 266                 if ( (*ap)->a_desc == slap_schema.si_ad_objectClass ||
 267                                 (*ap)->a_desc == slap_schema.si_ad_structuralObjectClass )
 268                 {
 269                         int             j, last;
 270
 271                         last = (*ap)->a_numvals - 1;
 272                         for ( j = 0; !BER_BVISNULL( &(*ap)->a_vals[ j ] ); j++ ) {
 273                                 struct ldapmapping      *mapping = NULL;
 274
 275                                 ( void )rwm_mapping( &rwmap->rwm_oc, &(*ap)->a_vals[ j ],
 276                                                 &mapping, RWM_MAP );
 277                                 if ( mapping == NULL ) {
 278                                         if ( rwmap->rwm_at.drop_missing ) {
 279                                                 /* FIXME: we allow to remove objectClasses as well;
 280                                                  * if the resulting entry is inconsistent, that's
 281                                                  * the relayed database's business...
 282                                                  */
 283                                                 ch_free( (*ap)->a_vals[ j ].bv_val );
 284                                                 if ( last > j ) {
 285                                                         (*ap)->a_vals[ j ] = (*ap)->a_vals[ last ];
 286                                                 }
 287                                                 BER_BVZERO( &(*ap)->a_vals[ last ] );
 288                                                 (*ap)->a_numvals--;
 289                                                 last--;
 290                                                 j--;
 291                                         }
 292
 293                                 } else {
 294                                         ch_free( (*ap)->a_vals[ j ].bv_val );
 295                                         ber_dupbv( &(*ap)->a_vals[ j ], &mapping->m_dst );
 296                                 }
 297                         }
 298
 299                 } else if ( !isupdate && !get_relax( op ) && (*ap)->a_desc->ad_type->sat_no_user_mod )
 300                 {
 301                         goto next_attr;
 302
 303                 } else {
 304                         struct ldapmapping      *mapping = NULL;
 305
 306                         ( void )rwm_mapping( &rwmap->rwm_at, &(*ap)->a_desc->ad_cname,
 307                                         &mapping, RWM_MAP );
 308                         if ( mapping == NULL ) {
 309                                 if ( rwmap->rwm_at.drop_missing ) {
 310                                         goto cleanup_attr;
 311                                 }
 312                         }
 313
 314                         if ( (*ap)->a_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
 315                                         || ( mapping != NULL && mapping->m_dst_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
 316                         {
 317                                 /*
 318                                  * FIXME: rewrite could fail; in this case
 319                                  * the operation should give up, right?
 320                                  */
 321                                 rc = rwm_dnattr_rewrite( op, rs, "addAttrDN",
 322                                                 (*ap)->a_vals,
 323                                                 (*ap)->a_nvals ? &(*ap)->a_nvals : NULL );
 324                                 if ( rc ) {
 325                                         goto cleanup_attr;
 326                                 }
 327
 328                         } else if ( (*ap)->a_desc == slap_schema.si_ad_ref ) {
 329                                 rc = rwm_referral_rewrite( op, rs, "referralAttrDN",
 330                                                 (*ap)->a_vals,
 331                                                 (*ap)->a_nvals ? &(*ap)->a_nvals : NULL );
 332                                 if ( rc != LDAP_SUCCESS ) {
 333                                         goto cleanup_attr;
 334                                 }
 335                         }
 336
 337                         if ( mapping != NULL ) {
 338                                 assert( mapping->m_dst_ad != NULL );
 339                                 (*ap)->a_desc = mapping->m_dst_ad;
 340                         }
 341                 }
 342
 343 next_attr:;
 344                 ap = &(*ap)->a_next;
 345                 continue;
 346
 347 cleanup_attr:;
 348                 /* FIXME: leaking attribute/values? */
 349                 a = *ap;
 350
 351                 *ap = (*ap)->a_next;
 352                 attr_free( a );
 353         }
 354
 355         op->o_callback = &roc->cb;
 356
 357         return SLAP_CB_CONTINUE;
 358 }
 359
 360 static int
 361 rwm_conn_init( BackendDB *be, Connection *conn )
 362 {
 363         slap_overinst           *on = (slap_overinst *) be->bd_info;
 364         struct ldaprwmap        *rwmap =
 365                         (struct ldaprwmap *)on->on_bi.bi_private;
 366
 367         ( void )rewrite_session_init( rwmap->rwm_rw, conn );
 368
 369         return SLAP_CB_CONTINUE;
 370 }
 371
 372 static int
 373 rwm_conn_destroy( BackendDB *be, Connection *conn )
 374 {
 375         slap_overinst           *on = (slap_overinst *) be->bd_info;
 376         struct ldaprwmap        *rwmap =
 377                         (struct ldaprwmap *)on->on_bi.bi_private;
 378
 379         ( void )rewrite_session_delete( rwmap->rwm_rw, conn );
 380
 381         return SLAP_CB_CONTINUE;
 382 }
 383
 384 static int
 385 rwm_op_bind( Operation *op, SlapReply *rs )
 386 {
 387         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 388         int                     rc;
 389
 390         rwm_op_cb               *roc = rwm_callback_get( op, rs );
 391
 392         rc = rwm_op_dn_massage( op, rs, "bindDN", &roc->ros );
 393         if ( rc != LDAP_SUCCESS ) {
 394                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 395                 send_ldap_error( op, rs, rc, "bindDN massage error" );
 396                 return -1;
 397         }
 398
 399         overlay_callback_after_backover( op, &roc->cb, 1 );
 400
 401         return SLAP_CB_CONTINUE;
 402 }
 403
 404 static int
 405 rwm_op_unbind( Operation *op, SlapReply *rs )
 406 {
 407         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 408         struct ldaprwmap        *rwmap =
 409                         (struct ldaprwmap *)on->on_bi.bi_private;
 410
 411         rewrite_session_delete( rwmap->rwm_rw, op->o_conn );
 412
 413         return SLAP_CB_CONTINUE;
 414 }
 415
 416 static int
 417 rwm_op_compare( Operation *op, SlapReply *rs )
 418 {
 419         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 420         struct ldaprwmap        *rwmap =
 421                         (struct ldaprwmap *)on->on_bi.bi_private;
 422
 423         int                     rc;
 424         struct berval           mapped_vals[2] = { BER_BVNULL, BER_BVNULL };
 425
 426         rwm_op_cb               *roc = rwm_callback_get( op, rs );
 427
 428         rc = rwm_op_dn_massage( op, rs, "compareDN", &roc->ros );
 429         if ( rc != LDAP_SUCCESS ) {
 430                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 431                 send_ldap_error( op, rs, rc, "compareDN massage error" );
 432                 return -1;
 433         }
 434
 435         /* if the attribute is an objectClass, try to remap its value */
 436         if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass
 437                         || op->orc_ava->aa_desc == slap_schema.si_ad_structuralObjectClass )
 438         {
 439                 rwm_map( &rwmap->rwm_oc, &op->orc_ava->aa_value,
 440                                 &mapped_vals[0], RWM_MAP );
 441                 if ( BER_BVISNULL( &mapped_vals[0] ) || BER_BVISEMPTY( &mapped_vals[0] ) )
 442                 {
 443                         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 444                         send_ldap_error( op, rs, LDAP_OTHER, "compare objectClass map error" );
 445                         return -1;
 446
 447                 } else if ( mapped_vals[0].bv_val != op->orc_ava->aa_value.bv_val ) {
 448                         ber_dupbv_x( &op->orc_ava->aa_value, &mapped_vals[0],
 449                                 op->o_tmpmemctx );
 450                 }
 451
 452         } else {
 453                 struct ldapmapping      *mapping = NULL;
 454                 AttributeDescription    *ad = op->orc_ava->aa_desc;
 455
 456                 ( void )rwm_mapping( &rwmap->rwm_at, &op->orc_ava->aa_desc->ad_cname,
 457                                 &mapping, RWM_MAP );
 458                 if ( mapping == NULL ) {
 459                         if ( rwmap->rwm_at.drop_missing ) {
 460                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 461                                 send_ldap_error( op, rs, LDAP_OTHER, "compare attributeType map error" );
 462                                 return -1;
 463                         }
 464
 465                 } else {
 466                         assert( mapping->m_dst_ad != NULL );
 467                         ad = mapping->m_dst_ad;
 468                 }
 469
 470                 if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
 471                                 || ( mapping != NULL && mapping->m_dst_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
 472                 {
 473                         struct berval   *mapped_valsp[2];
 474
 475                         mapped_valsp[0] = &mapped_vals[0];
 476                         mapped_valsp[1] = &mapped_vals[1];
 477
 478                         mapped_vals[0] = op->orc_ava->aa_value;
 479
 480                         rc = rwm_dnattr_rewrite( op, rs, "compareAttrDN", NULL, mapped_valsp );
 481
 482                         if ( rc != LDAP_SUCCESS ) {
 483                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 484                                 send_ldap_error( op, rs, rc, "compareAttrDN massage error" );
 485                                 return -1;
 486                         }
 487
 488                         if ( mapped_vals[ 0 ].bv_val != op->orc_ava->aa_value.bv_val ) {
 489                                 /* NOTE: if we get here, rwm_dnattr_rewrite()
 490                                  * already freed the old value, so now
 491                                  * it's invalid */
 492                                 ber_dupbv_x( &op->orc_ava->aa_value, &mapped_vals[0],
 493                                         op->o_tmpmemctx );
 494                                 ber_memfree_x( mapped_vals[ 0 ].bv_val, NULL );
 495                         }
 496                 }
 497                 op->orc_ava->aa_desc = ad;
 498         }
 499
 500         op->o_callback = &roc->cb;
 501
 502         return SLAP_CB_CONTINUE;
 503 }
 504
 505 static int
 506 rwm_op_delete( Operation *op, SlapReply *rs )
 507 {
 508         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 509         int                     rc;
 510
 511         rwm_op_cb               *roc = rwm_callback_get( op, rs );
 512
 513         rc = rwm_op_dn_massage( op, rs, "deleteDN", &roc->ros );
 514         if ( rc != LDAP_SUCCESS ) {
 515                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 516                 send_ldap_error( op, rs, rc, "deleteDN massage error" );
 517                 return -1;
 518         }
 519
 520         op->o_callback = &roc->cb;
 521
 522         return SLAP_CB_CONTINUE;
 523 }
 524
 525 static int
 526 rwm_op_modify( Operation *op, SlapReply *rs )
 527 {
 528         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 529         struct ldaprwmap        *rwmap =
 530                         (struct ldaprwmap *)on->on_bi.bi_private;
 531
 532         int                     isupdate;
 533         Modifications           **mlp;
 534         int                     rc;
 535
 536         rwm_op_cb               *roc = rwm_callback_get( op, rs );
 537
 538         rc = rwm_op_dn_massage( op, rs, "modifyDN", &roc->ros );
 539         if ( rc != LDAP_SUCCESS ) {
 540                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 541                 send_ldap_error( op, rs, rc, "modifyDN massage error" );
 542                 return -1;
 543         }
 544
 545         isupdate = be_shadow_update( op );
 546         for ( mlp = &op->orm_modlist; *mlp; ) {
 547                 int                     is_oc = 0;
 548                 Modifications           *ml = *mlp;
 549                 struct ldapmapping      *mapping = NULL;
 550
 551                 /* ml points to a temporary mod until needs duplication */
 552                 if ( ml->sml_desc == slap_schema.si_ad_objectClass
 553                                 || ml->sml_desc == slap_schema.si_ad_structuralObjectClass )
 554                 {
 555                         is_oc = 1;
 556
 557                 } else if ( !isupdate && !get_relax( op ) && ml->sml_desc->ad_type->sat_no_user_mod  )
 558                 {
 559                         ml = ch_malloc( sizeof( Modifications ) );
 560                         *ml = **mlp;
 561                         if ( (*mlp)->sml_values ) {
 562                                 ber_bvarray_dup_x( &ml->sml_values, (*mlp)->sml_values, NULL );
 563                                 if ( (*mlp)->sml_nvalues ) {
 564                                         ber_bvarray_dup_x( &ml->sml_nvalues, (*mlp)->sml_nvalues, NULL );
 565                                 }
 566                         }
 567                         *mlp = ml;
 568                         goto next_mod;
 569
 570                 } else {
 571                         int                     drop_missing;
 572
 573                         drop_missing = rwm_mapping( &rwmap->rwm_at,
 574                                         &ml->sml_desc->ad_cname,
 575                                         &mapping, RWM_MAP );
 576                         if ( drop_missing || ( mapping != NULL && BER_BVISNULL( &mapping->m_dst ) ) )
 577                         {
 578                                 goto cleanup_mod;
 579                         }
 580                 }
 581
 582                 /* duplicate the modlist */
 583                 ml = ch_malloc( sizeof( Modifications ));
 584                 *ml = **mlp;
 585                 *mlp = ml;
 586
 587                 if ( ml->sml_values != NULL ) {
 588                         int i, num;
 589                         struct berval *bva;
 590
 591                         for ( num = 0; !BER_BVISNULL( &ml->sml_values[ num ] ); num++ )
 592                                 /* count values */ ;
 593
 594                         bva = ch_malloc( (num+1) * sizeof( struct berval ));
 595                         for (i=0; i<num; i++)
 596                                 ber_dupbv( &bva[i], &ml->sml_values[i] );
 597                         BER_BVZERO( &bva[i] );
 598                         ml->sml_values = bva;
 599
 600                         if ( ml->sml_nvalues ) {
 601                                 bva = ch_malloc( (num+1) * sizeof( struct berval ));
 602                                 for (i=0; i<num; i++)
 603                                         ber_dupbv( &bva[i], &ml->sml_nvalues[i] );
 604                                 BER_BVZERO( &bva[i] );
 605                                 ml->sml_nvalues = bva;
 606                         }
 607
 608                         if ( is_oc ) {
 609                                 int     last, j;
 610
 611                                 last = num-1;
 612
 613                                 for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ ) {
 614                                         struct ldapmapping      *oc_mapping = NULL;
 615
 616                                         ( void )rwm_mapping( &rwmap->rwm_oc, &ml->sml_values[ j ],
 617                                                         &oc_mapping, RWM_MAP );
 618                                         if ( oc_mapping == NULL ) {
 619                                                 if ( rwmap->rwm_at.drop_missing ) {
 620                                                         /* FIXME: we allow to remove objectClasses as well;
 621                                                          * if the resulting entry is inconsistent, that's
 622                                                          * the relayed database's business...
 623                                                          */
 624                                                         if ( last > j ) {
 625                                                                 ch_free( ml->sml_values[ j ].bv_val );
 626                                                                 ml->sml_values[ j ] = ml->sml_values[ last ];
 627                                                         }
 628                                                         BER_BVZERO( &ml->sml_values[ last ] );
 629                                                         last--;
 630                                                         j--;
 631                                                 }
 632
 633                                         } else {
 634                                                 ch_free( ml->sml_values[ j ].bv_val );
 635                                                 ber_dupbv( &ml->sml_values[ j ], &oc_mapping->m_dst );
 636                                         }
 637                                 }
 638
 639                         } else {
 640                                 if ( ml->sml_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
 641                                                 || ( mapping != NULL && mapping->m_dst_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
 642                                 {
 643                                         rc = rwm_dnattr_rewrite( op, rs, "modifyAttrDN",
 644                                                         ml->sml_values,
 645                                                         ml->sml_nvalues ? &ml->sml_nvalues : NULL );
 646
 647                                 } else if ( ml->sml_desc == slap_schema.si_ad_ref ) {
 648                                         rc = rwm_referral_rewrite( op, rs,
 649                                                         "referralAttrDN",
 650                                                         ml->sml_values,
 651                                                         ml->sml_nvalues ? &ml->sml_nvalues : NULL );
 652                                         if ( rc != LDAP_SUCCESS ) {
 653                                                 goto cleanup_mod;
 654                                         }
 655                                 }
 656
 657                                 if ( rc != LDAP_SUCCESS ) {
 658                                         goto cleanup_mod;
 659                                 }
 660                         }
 661                 }
 662
 663 next_mod:;
 664                 if ( mapping != NULL ) {
 665                         /* use new attribute description */
 666                         assert( mapping->m_dst_ad != NULL );
 667                         ml->sml_desc = mapping->m_dst_ad;
 668                 }
 669
 670                 mlp = &ml->sml_next;
 671                 continue;
 672
 673 cleanup_mod:;
 674                 ml = *mlp;
 675                 *mlp = (*mlp)->sml_next;
 676                 slap_mod_free( &ml->sml_mod, 0 );
 677                 free( ml );
 678         }
 679
 680         op->o_callback = &roc->cb;
 681
 682         return SLAP_CB_CONTINUE;
 683 }
 684
 685 static int
 686 rwm_op_modrdn( Operation *op, SlapReply *rs )
 687 {
 688         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 689         struct ldaprwmap        *rwmap =
 690                         (struct ldaprwmap *)on->on_bi.bi_private;
 691
 692         int                     rc;
 693         dncookie                dc;
 694
 695         rwm_op_cb               *roc = rwm_callback_get( op, rs );
 696
 697         if ( op->orr_newSup ) {
 698                 struct berval   nnewSup = BER_BVNULL;
 699                 struct berval   newSup = BER_BVNULL;
 700
 701                 /*
 702                  * Rewrite the new superior, if defined and required
 703                  */
 704                 dc.rwmap = rwmap;
 705                 dc.conn = op->o_conn;
 706                 dc.rs = rs;
 707                 dc.ctx = "newSuperiorDN";
 708                 newSup = *op->orr_newSup;
 709                 nnewSup = *op->orr_nnewSup;
 710                 rc = rwm_dn_massage_pretty_normalize( &dc, op->orr_newSup, &newSup, &nnewSup );
 711                 if ( rc != LDAP_SUCCESS ) {
 712                         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 713                         send_ldap_error( op, rs, rc, "newSuperiorDN massage error" );
 714                         return -1;
 715                 }
 716
 717                 if ( op->orr_newSup->bv_val != newSup.bv_val ) {
 718                         op->orr_newSup = op->o_tmpalloc( sizeof( struct berval ),
 719                                 op->o_tmpmemctx );
 720                         op->orr_nnewSup = op->o_tmpalloc( sizeof( struct berval ),
 721                                 op->o_tmpmemctx );
 722                         *op->orr_newSup = newSup;
 723                         *op->orr_nnewSup = nnewSup;
 724                 }
 725         }
 726
 727         /*
 728          * Rewrite the newRDN, if needed
 729          */
 730         {
 731                 struct berval   newrdn = BER_BVNULL;
 732                 struct berval   nnewrdn = BER_BVNULL;
 733
 734                 dc.rwmap = rwmap;
 735                 dc.conn = op->o_conn;
 736                 dc.rs = rs;
 737                 dc.ctx = "newRDN";
 738                 newrdn = op->orr_newrdn;
 739                 nnewrdn = op->orr_nnewrdn;
 740                 rc = rwm_dn_massage_pretty_normalize( &dc, &op->orr_newrdn, &newrdn, &nnewrdn );
 741                 if ( rc != LDAP_SUCCESS ) {
 742                         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 743                         send_ldap_error( op, rs, rc, "newRDN massage error" );
 744                         goto err;
 745                 }
 746
 747                 if ( op->orr_newrdn.bv_val != newrdn.bv_val ) {
 748                         op->orr_newrdn = newrdn;
 749                         op->orr_nnewrdn = nnewrdn;
 750                 }
 751         }
 752
 753         /*
 754          * Rewrite the dn, if needed
 755          */
 756         rc = rwm_op_dn_massage( op, rs, "renameDN", &roc->ros );
 757         if ( rc != LDAP_SUCCESS ) {
 758                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 759                 send_ldap_error( op, rs, rc, "renameDN massage error" );
 760                 goto err;
 761         }
 762
 763         op->o_callback = &roc->cb;
 764
 765         rc = SLAP_CB_CONTINUE;
 766
 767         if ( 0 ) {
 768 err:;
 769                 if ( op->orr_newSup != roc->ros.orr_newSup ) {
 770                         ch_free( op->orr_newSup->bv_val );
 771                         ch_free( op->orr_nnewSup->bv_val );
 772                         op->o_tmpfree( op->orr_newSup, op->o_tmpmemctx );
 773                         op->o_tmpfree( op->orr_nnewSup, op->o_tmpmemctx );
 774                         op->orr_newSup = roc->ros.orr_newSup;
 775                         op->orr_nnewSup = roc->ros.orr_nnewSup;
 776                 }
 777
 778                 if ( op->orr_newrdn.bv_val != roc->ros.orr_newrdn.bv_val ) {
 779                         ch_free( op->orr_newrdn.bv_val );
 780                         ch_free( op->orr_nnewrdn.bv_val );
 781                         op->orr_newrdn = roc->ros.orr_newrdn;
 782                         op->orr_nnewrdn = roc->ros.orr_nnewrdn;
 783                 }
 784         }
 785
 786         return rc;
 787 }
 788
 789
 790 static int
 791 rwm_swap_attrs( Operation *op, SlapReply *rs )
 792 {
 793         slap_callback   *cb = op->o_callback;
 794         rwm_op_state *ros = cb->sc_private;
 795
 796         rs->sr_attrs = ros->ors_attrs;
 797
 798         /* other overlays might have touched op->ors_attrs,
 799          * so we restore the original version here, otherwise
 800          * attribute-mapping might fail */
 801         op->ors_attrs = ros->mapped_attrs;
 802
 803         return SLAP_CB_CONTINUE;
 804 }
 805
 806 /*
 807  * NOTE: this implementation of get/release entry is probably far from
 808  * optimal.  The rationale consists in intercepting the request directed
 809  * to the underlying database, in order to rewrite/remap the request,
 810  * perform it using the modified data, duplicate the resulting entry
 811  * and finally free it when release is called.
 812  * This implies that subsequent overlays are not called, as the request
 813  * is directly shunted to the underlying database.
 814  */
 815 static int
 816 rwm_entry_release_rw( Operation *op, Entry *e, int rw )
 817 {
 818         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 819
 820         /* can't be ours */
 821         if ( ((BackendInfo *)on->on_info->oi_orig)->bi_entry_get_rw == NULL ) {
 822                 return SLAP_CB_CONTINUE;
 823         }
 824
 825         /* just free entry if (probably) ours */
 826         if ( e->e_private == NULL ) {
 827                 entry_free( e );
 828                 return LDAP_SUCCESS;
 829         }
 830
 831         return SLAP_CB_CONTINUE;
 832 }
 833
 834 static int
 835 rwm_entry_get_rw( Operation *op, struct berval *ndn,
 836         ObjectClass *oc, AttributeDescription *at, int rw, Entry **ep )
 837 {
 838         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 839         struct ldaprwmap        *rwmap =
 840                         (struct ldaprwmap *)on->on_bi.bi_private;
 841
 842         int                     rc;
 843         dncookie                dc;
 844
 845         BackendDB               db;
 846         Operation               op2;
 847         SlapReply               rs = { REP_SEARCH };
 848
 849         rwm_op_state            ros = { 0 };
 850
 851         if ( ((BackendInfo *)on->on_info->oi_orig)->bi_entry_get_rw == NULL ) {
 852                 return SLAP_CB_CONTINUE;
 853         }
 854
 855         /* massage DN */
 856         op2.o_tag = LDAP_REQ_SEARCH;
 857         op2 = *op;
 858         op2.o_req_dn = *ndn;
 859         op2.o_req_ndn = *ndn;
 860         rc = rwm_op_dn_massage( &op2, &rs, "searchDN", &ros );
 861         if ( rc != LDAP_SUCCESS ) {
 862                 return LDAP_OTHER;
 863         }
 864
 865         /* map attribute & objectClass */
 866         if ( at != NULL ) {
 867         }
 868
 869         if ( oc != NULL ) {
 870         }
 871
 872         /* fetch entry */
 873         db = *op->o_bd;
 874         op2.o_bd = &db;
 875         op2.o_bd->bd_info = (BackendInfo *)on->on_info->oi_orig;
 876         op2.ors_attrs = slap_anlist_all_attributes;
 877         rc = op2.o_bd->bd_info->bi_entry_get_rw( &op2, &ros.r_ndn, oc, at, rw, ep );
 878         if ( rc == LDAP_SUCCESS && *ep != NULL ) {
 879                 rs.sr_entry = *ep;
 880
 881                 /* duplicate & release */
 882                 op2.o_bd->bd_info = (BackendInfo *)on;
 883                 rc = rwm_send_entry( &op2, &rs );
 884                 if ( rc == SLAP_CB_CONTINUE ) {
 885                         *ep = rs.sr_entry;
 886                         rc = LDAP_SUCCESS;
 887                 }
 888         }
 889
 890         if ( ros.r_ndn.bv_val != ndn->bv_val ) {
 891                 op->o_tmpfree( ros.r_ndn.bv_val, op->o_tmpmemctx );
 892         }
 893
 894         return rc;
 895 }
 896
 897 static int
 898 rwm_op_search( Operation *op, SlapReply *rs )
 899 {
 900         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 901         struct ldaprwmap        *rwmap =
 902                         (struct ldaprwmap *)on->on_bi.bi_private;
 903
 904         int                     rc;
 905         dncookie                dc;
 906
 907         struct berval           fstr = BER_BVNULL;
 908         Filter                  *f = NULL;
 909
 910         AttributeName           *an = NULL;
 911
 912         char                    *text = NULL;
 913
 914         rwm_op_cb               *roc = rwm_callback_get( op, rs );
 915
 916         rc = rewrite_session_var_set( rwmap->rwm_rw, op->o_conn,
 917                 "searchFilter", op->ors_filterstr.bv_val );
 918         if ( rc == LDAP_SUCCESS )
 919                 rc = rwm_op_dn_massage( op, rs, "searchDN", &roc->ros );
 920         if ( rc != LDAP_SUCCESS ) {
 921                 text = "searchDN massage error";
 922                 goto error_return;
 923         }
 924
 925         /*
 926          * Rewrite the dn if needed
 927          */
 928         dc.rwmap = rwmap;
 929         dc.conn = op->o_conn;
 930         dc.rs = rs;
 931         dc.ctx = "searchFilterAttrDN";
 932
 933         rc = rwm_filter_map_rewrite( op, &dc, op->ors_filter, &fstr );
 934         if ( rc != LDAP_SUCCESS ) {
 935                 text = "searchFilter/searchFilterAttrDN massage error";
 936                 goto error_return;
 937         }
 938
 939         f = str2filter_x( op, fstr.bv_val );
 940
 941         if ( f == NULL ) {
 942                 text = "massaged filter parse error";
 943                 goto error_return;
 944         }
 945
 946         op->ors_filter = f;
 947         op->ors_filterstr = fstr;
 948
 949         rc = rwm_map_attrnames( &rwmap->rwm_at, &rwmap->rwm_oc,
 950                         op->ors_attrs, &an, RWM_MAP );
 951         if ( rc != LDAP_SUCCESS ) {
 952                 text = "attribute list mapping error";
 953                 goto error_return;
 954         }
 955
 956         op->ors_attrs = an;
 957         /* store the mapped Attributes for later usage, in
 958          * the case that other overlays change op->ors_attrs */
 959         roc->ros.mapped_attrs = an;
 960         roc->cb.sc_response = rwm_swap_attrs;
 961
 962         op->o_callback = &roc->cb;
 963
 964         return SLAP_CB_CONTINUE;
 965
 966 error_return:;
 967         if ( an != NULL ) {
 968                 ch_free( an );
 969         }
 970
 971         if ( f != NULL ) {
 972                 filter_free_x( op, f, 1 );
 973         }
 974
 975         if ( !BER_BVISNULL( &fstr ) ) {
 976                 ch_free( fstr.bv_val );
 977         }
 978
 979         rwm_op_rollback( op, rs, &roc->ros );
 980         op->oq_search = roc->ros.oq_search;
 981         op->o_tmpfree( roc, op->o_tmpmemctx );
 982
 983         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 984         send_ldap_error( op, rs, rc, text );
 985
 986         return -1;
 987
 988 }
 989
 990 static int
 991 rwm_exop_passwd( Operation *op, SlapReply *rs )
 992 {
 993         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
 994         int                     rc;
 995         rwm_op_cb *roc;
 996
 997         struct berval   id = BER_BVNULL,
 998                         pwold = BER_BVNULL,
 999                         pwnew = BER_BVNULL;
1000         BerElement *ber = NULL;
1001
1002         if ( !BER_BVISNULL( &op->o_req_ndn ) ) {
1003                 return LDAP_SUCCESS;
1004         }
1005
1006         if ( !SLAP_ISGLOBALOVERLAY( op->o_bd ) ) {
1007                 rs->sr_err = LDAP_OTHER;
1008                 return rs->sr_err;
1009         }
1010
1011         rs->sr_err = slap_passwd_parse( op->ore_reqdata, &id,
1012                 &pwold, &pwnew, &rs->sr_text );
1013         if ( rs->sr_err != LDAP_SUCCESS ) {
1014                 return rs->sr_err;
1015         }
1016
1017         if ( !BER_BVISNULL( &id ) ) {
1018                 char idNul = id.bv_val[id.bv_len];
1019                 id.bv_val[id.bv_len] = '\0';
1020                 rs->sr_err = dnPrettyNormal( NULL, &id, &op->o_req_dn,
1021                                 &op->o_req_ndn, op->o_tmpmemctx );
1022                 id.bv_val[id.bv_len] = idNul;
1023                 if ( rs->sr_err != LDAP_SUCCESS ) {
1024                         rs->sr_text = "Invalid DN";
1025                         return rs->sr_err;
1026                 }
1027
1028         } else {
1029                 ber_dupbv_x( &op->o_req_dn, &op->o_dn, op->o_tmpmemctx );
1030                 ber_dupbv_x( &op->o_req_ndn, &op->o_ndn, op->o_tmpmemctx );
1031         }
1032
1033         roc = rwm_callback_get( op, rs );
1034
1035         rc = rwm_op_dn_massage( op, rs, "extendedDN", &roc->ros );
1036         if ( rc != LDAP_SUCCESS ) {
1037                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1038                 send_ldap_error( op, rs, rc, "extendedDN massage error" );
1039                 return -1;
1040         }
1041
1042         ber = ber_alloc_t( LBER_USE_DER );
1043         if ( !ber ) {
1044                 rs->sr_err = LDAP_OTHER;
1045                 rs->sr_text = "No memory";
1046                 return rs->sr_err;
1047         }
1048         ber_printf( ber, "{" );
1049         if ( !BER_BVISNULL( &id )) {
1050                 ber_printf( ber, "tO", LDAP_TAG_EXOP_MODIFY_PASSWD_ID,
1051                         &op->o_req_dn );
1052         }
1053         if ( !BER_BVISNULL( &pwold )) {
1054                 ber_printf( ber, "tO", LDAP_TAG_EXOP_MODIFY_PASSWD_OLD, &pwold );
1055         }
1056         if ( !BER_BVISNULL( &pwnew )) {
1057                 ber_printf( ber, "tO", LDAP_TAG_EXOP_MODIFY_PASSWD_NEW, &pwnew );
1058         }
1059         ber_printf( ber, "N}" );
1060         ber_flatten( ber, &op->ore_reqdata );
1061         ber_free( ber, 1 );
1062
1063         op->o_callback = &roc->cb;
1064
1065         return SLAP_CB_CONTINUE;
1066 }
1067
1068 static struct exop {
1069         struct berval   oid;
1070         BI_op_extended  *extended;
1071 } exop_table[] = {
1072         { BER_BVC(LDAP_EXOP_MODIFY_PASSWD),     rwm_exop_passwd },
1073         { BER_BVNULL, NULL }
1074 };
1075
1076 static int
1077 rwm_extended( Operation *op, SlapReply *rs )
1078 {
1079         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
1080         int                     rc;
1081         rwm_op_cb *roc;
1082
1083         int     i;
1084
1085         for ( i = 0; exop_table[i].extended != NULL; i++ ) {
1086                 if ( bvmatch( &exop_table[i].oid, &op->oq_extended.rs_reqoid ) )
1087                 {
1088                         rc = exop_table[i].extended( op, rs );
1089                         switch ( rc ) {
1090                         case LDAP_SUCCESS:
1091                                 break;
1092
1093                         case SLAP_CB_CONTINUE:
1094                         case SLAPD_ABANDON:
1095                                 return rc;
1096
1097                         default:
1098                                 send_ldap_result( op, rs );
1099                                 return rc;
1100                         }
1101                         break;
1102                 }
1103         }
1104
1105         roc = rwm_callback_get( op, rs );
1106
1107         rc = rwm_op_dn_massage( op, rs, "extendedDN", &roc->ros );
1108         if ( rc != LDAP_SUCCESS ) {
1109                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1110                 send_ldap_error( op, rs, rc, "extendedDN massage error" );
1111                 return -1;
1112         }
1113
1114         /* TODO: rewrite/map extended data ? ... */
1115         op->o_callback = &roc->cb;
1116
1117         return SLAP_CB_CONTINUE;
1118 }
1119
1120 static int
1121 rwm_matched( Operation *op, SlapReply *rs )
1122 {
1123         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
1124         struct ldaprwmap        *rwmap =
1125                         (struct ldaprwmap *)on->on_bi.bi_private;
1126
1127         struct berval           dn, mdn;
1128         dncookie                dc;
1129         int                     rc;
1130
1131         if ( rs->sr_matched == NULL ) {
1132                 return SLAP_CB_CONTINUE;
1133         }
1134
1135         dc.rwmap = rwmap;
1136         dc.conn = op->o_conn;
1137         dc.rs = rs;
1138         dc.ctx = "matchedDN";
1139         ber_str2bv( rs->sr_matched, 0, 0, &dn );
1140         mdn = dn;
1141         rc = rwm_dn_massage_pretty( &dc, &dn, &mdn );
1142         if ( rc != LDAP_SUCCESS ) {
1143                 rs->sr_err = rc;
1144                 rs->sr_text = "Rewrite error";
1145                 return 1;
1146         }
1147
1148         if ( mdn.bv_val != dn.bv_val ) {
1149                 if ( rs->sr_flags & REP_MATCHED_MUSTBEFREED ) {
1150                         ch_free( (void *)rs->sr_matched );
1151
1152                 } else {
1153                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
1154                 }
1155                 rs->sr_matched = mdn.bv_val;
1156         }
1157
1158         return SLAP_CB_CONTINUE;
1159 }
1160
1161 static int
1162 rwm_attrs( Operation *op, SlapReply *rs, Attribute** a_first, int stripEntryDN )
1163 {
1164         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
1165         struct ldaprwmap        *rwmap =
1166                         (struct ldaprwmap *)on->on_bi.bi_private;
1167
1168         dncookie                dc;
1169         int                     rc;
1170         Attribute               **ap;
1171         int                     isupdate;
1172         int                     check_duplicate_attrs = 0;
1173
1174         /*
1175          * Rewrite the dn attrs, if needed
1176          */
1177         dc.rwmap = rwmap;
1178         dc.conn = op->o_conn;
1179         dc.rs = NULL;
1180
1181         /* FIXME: the entries are in the remote mapping form;
1182          * so we need to select those attributes we are willing
1183          * to return, and remap them accordingly */
1184
1185         /* FIXME: in principle, one could map an attribute
1186          * on top of another, which already exists.
1187          * As such, in the end there might exist more than
1188          * one instance of an attribute.
1189          * We should at least check if this occurs, and issue
1190          * an error (because multiple instances of attrs in
1191          * response are not valid), or merge the values (what
1192          * about duplicate values?) */
1193         isupdate = be_shadow_update( op );
1194         for ( ap = a_first; *ap; ) {
1195                 struct ldapmapping      *mapping = NULL;
1196                 int                     drop_missing;
1197                 int                     last = -1;
1198                 Attribute               *a;
1199
1200                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) && is_at_operational( (*ap)->a_desc->ad_type ) )
1201                 {
1202                         /* go on */ ;
1203
1204                 } else {
1205                         if ( op->ors_attrs != NULL &&
1206                                         !SLAP_USERATTRS( rs->sr_attr_flags ) &&
1207                                         !ad_inlist( (*ap)->a_desc, op->ors_attrs ) )
1208                         {
1209                                 goto cleanup_attr;
1210                         }
1211
1212                         drop_missing = rwm_mapping( &rwmap->rwm_at,
1213                                         &(*ap)->a_desc->ad_cname, &mapping, RWM_REMAP );
1214                         if ( drop_missing || ( mapping != NULL && BER_BVISEMPTY( &mapping->m_dst ) ) )
1215                         {
1216                                 goto cleanup_attr;
1217                         }
1218                         if ( mapping != NULL ) {
1219                                 assert( mapping->m_dst_ad != NULL );
1220
1221                                 /* try to normalize mapped Attributes if the original
1222                                  * AttributeType was not normalized */
1223                                 if ( (!(*ap)->a_desc->ad_type->sat_equality ||
1224                                         !(*ap)->a_desc->ad_type->sat_equality->smr_normalize) &&
1225                                         mapping->m_dst_ad->ad_type->sat_equality &&
1226                                         mapping->m_dst_ad->ad_type->sat_equality->smr_normalize )
1227                                 {
1228                                         if ((rwmap->rwm_flags & RWM_F_NORMALIZE_MAPPED_ATTRS))
1229                                         {
1230                                                 int i = 0;
1231
1232                                                 last = (*ap)->a_numvals;
1233                                                 if ( last )
1234                                                 {
1235                                                         (*ap)->a_nvals = ch_malloc( (last+1) * sizeof(struct berval) );
1236
1237                                                         for ( i = 0; !BER_BVISNULL( &(*ap)->a_vals[i]); i++ ) {
1238                                                                 int             rc;
1239                                                                 /*
1240                                                                  * check that each value is valid per syntax
1241                                                                  * and pretty if appropriate
1242                                                                  */
1243                                                                 rc = mapping->m_dst_ad->ad_type->sat_equality->smr_normalize(
1244                                                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
1245                                                                         mapping->m_dst_ad->ad_type->sat_syntax,
1246                                                                         mapping->m_dst_ad->ad_type->sat_equality,
1247                                                                         &(*ap)->a_vals[i], &(*ap)->a_nvals[i],
1248                                                                         NULL );
1249
1250                                                                 if ( rc != LDAP_SUCCESS ) {
1251                                                                         BER_BVZERO( &(*ap)->a_nvals[i] );
1252                                                                 }
1253                                                         }
1254                                                         BER_BVZERO( &(*ap)->a_nvals[i] );
1255                                                 }
1256
1257                                         } else {
1258                                                 assert( (*ap)->a_nvals == (*ap)->a_vals );
1259                                                 (*ap)->a_nvals = NULL;
1260                                                 ber_bvarray_dup_x( &(*ap)->a_nvals, (*ap)->a_vals, NULL );
1261                                         }
1262                                 }
1263
1264                                 /* rewrite the attribute description */
1265                                 (*ap)->a_desc = mapping->m_dst_ad;
1266
1267                                 /* will need to check for duplicate attrs */
1268                                 check_duplicate_attrs++;
1269                         }
1270                 }
1271
1272                 if ( (*ap)->a_desc == slap_schema.si_ad_entryDN ) {
1273                         if ( stripEntryDN ) {
1274                                 /* will be generated by frontend */
1275                                 goto cleanup_attr;
1276                         }
1277
1278                 } else if ( !isupdate
1279                         && !get_relax( op )
1280                         && (*ap)->a_desc->ad_type->sat_no_user_mod
1281                         && (*ap)->a_desc->ad_type != slap_schema.si_at_undefined )
1282                 {
1283                         goto next_attr;
1284                 }
1285
1286                 if ( last == -1 ) { /* not yet counted */
1287                         last = (*ap)->a_numvals;
1288                 }
1289
1290                 if ( last == 0 ) {
1291                         /* empty? leave it in place because of attrsonly and vlv */
1292                         goto next_attr;
1293                 }
1294                 last--;
1295
1296                 if ( (*ap)->a_desc == slap_schema.si_ad_objectClass
1297                                 || (*ap)->a_desc == slap_schema.si_ad_structuralObjectClass )
1298                 {
1299                         struct berval   *bv;
1300
1301                         for ( bv = (*ap)->a_vals; !BER_BVISNULL( bv ); bv++ ) {
1302                                 struct berval   mapped;
1303
1304                                 rwm_map( &rwmap->rwm_oc, &bv[0], &mapped, RWM_REMAP );
1305                                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
1306 remove_oc:;
1307                                         ch_free( bv[0].bv_val );
1308                                         BER_BVZERO( &bv[0] );
1309                                         if ( &(*ap)->a_vals[last] > &bv[0] ) {
1310                                                 bv[0] = (*ap)->a_vals[last];
1311                                                 BER_BVZERO( &(*ap)->a_vals[last] );
1312                                         }
1313                                         last--;
1314                                         bv--;
1315
1316                                 } else if ( mapped.bv_val != bv[0].bv_val
1317                                         && ber_bvstrcasecmp( &mapped, &bv[0] ) != 0 )
1318                                 {
1319                                         int     i;
1320
1321                                         for ( i = 0; !BER_BVISNULL( &(*ap)->a_vals[ i ] ); i++ ) {
1322                                                 if ( &(*ap)->a_vals[ i ] == bv ) {
1323                                                         continue;
1324                                                 }
1325
1326                                                 if ( ber_bvstrcasecmp( &mapped, &(*ap)->a_vals[ i ] ) == 0 ) {
1327                                                         break;
1328                                                 }
1329                                         }
1330
1331                                         if ( !BER_BVISNULL( &(*ap)->a_vals[ i ] ) ) {
1332                                                 goto remove_oc;
1333                                         }
1334
1335                                         /*
1336                                          * FIXME: after LBER_FREEing
1337                                          * the value is replaced by
1338                                          * ch_alloc'ed memory
1339                                          */
1340                                         ber_bvreplace( &bv[0], &mapped );
1341
1342                                         /* FIXME: will need to check
1343                                          * if the structuralObjectClass
1344                                          * changed */
1345                                 }
1346                         }
1347
1348                 /*
1349                  * It is necessary to try to rewrite attributes with
1350                  * dn syntax because they might be used in ACLs as
1351                  * members of groups; since ACLs are applied to the
1352                  * rewritten stuff, no dn-based subject clause could
1353                  * be used at the ldap backend side (see
1354                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
1355                  * The problem can be overcome by moving the dn-based
1356                  * ACLs to the target directory server, and letting
1357                  * everything pass thru the ldap backend. */
1358                 /* FIXME: handle distinguishedName-like syntaxes, like
1359                  * nameAndOptionalUID */
1360                 } else if ( (*ap)->a_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
1361                                 || ( mapping != NULL && mapping->m_src_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
1362                 {
1363                         dc.ctx = "searchAttrDN";
1364                         rc = rwm_dnattr_result_rewrite( &dc, (*ap)->a_vals, (*ap)->a_nvals );
1365                         if ( rc != LDAP_SUCCESS ) {
1366                                 goto cleanup_attr;
1367                         }
1368
1369                 } else if ( (*ap)->a_desc == slap_schema.si_ad_ref ) {
1370                         dc.ctx = "searchAttrDN";
1371                         rc = rwm_referral_result_rewrite( &dc, (*ap)->a_vals );
1372                         if ( rc != LDAP_SUCCESS ) {
1373                                 goto cleanup_attr;
1374                         }
1375                 }
1376
1377
1378 next_attr:;
1379                 ap = &(*ap)->a_next;
1380                 continue;
1381
1382 cleanup_attr:;
1383                 a = *ap;
1384                 *ap = (*ap)->a_next;
1385
1386                 attr_free( a );
1387         }
1388
1389         /* only check if some mapping occurred */
1390         if ( check_duplicate_attrs ) {
1391                 for ( ap = a_first; *ap != NULL; ap = &(*ap)->a_next ) {
1392                         Attribute       **tap;
1393
1394                         for ( tap = &(*ap)->a_next; *tap != NULL; ) {
1395                                 if ( (*tap)->a_desc == (*ap)->a_desc ) {
1396                                         Entry           e = { 0 };
1397                                         Modification    mod = { 0 };
1398                                         const char      *text = NULL;
1399                                         char            textbuf[ SLAP_TEXT_BUFLEN ];
1400                                         Attribute       *next = (*tap)->a_next;
1401
1402                                         BER_BVSTR( &e.e_name, "" );
1403                                         BER_BVSTR( &e.e_nname, "" );
1404                                         e.e_attrs = *ap;
1405                                         mod.sm_op = LDAP_MOD_ADD;
1406                                         mod.sm_desc = (*ap)->a_desc;
1407                                         mod.sm_type = mod.sm_desc->ad_cname;
1408                                         mod.sm_numvals = (*tap)->a_numvals;
1409                                         mod.sm_values = (*tap)->a_vals;
1410                                         if ( (*tap)->a_nvals != (*tap)->a_vals ) {
1411                                                 mod.sm_nvalues = (*tap)->a_nvals;
1412                                         }
1413
1414                                         (void)modify_add_values( &e, &mod,
1415                                                 /* permissive */ 1,
1416                                                 &text, textbuf, sizeof( textbuf ) );
1417
1418                                         /* should not insert new attrs! */
1419                                         assert( e.e_attrs == *ap );
1420
1421                                         attr_free( *tap );
1422                                         *tap = next;
1423
1424                                 } else {
1425                                         tap = &(*tap)->a_next;
1426                                 }
1427                         }
1428                 }
1429         }
1430
1431         return 0;
1432 }
1433
1434 static int
1435 rwm_send_entry( Operation *op, SlapReply *rs )
1436 {
1437         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
1438         struct ldaprwmap        *rwmap =
1439                         (struct ldaprwmap *)on->on_bi.bi_private;
1440
1441         Entry                   *e = NULL;
1442         slap_mask_t             flags;
1443         struct berval           dn = BER_BVNULL,
1444                                 ndn = BER_BVNULL;
1445         dncookie                dc;
1446         int                     rc;
1447
1448         assert( rs->sr_entry != NULL );
1449
1450         /*
1451          * Rewrite the dn of the result, if needed
1452          */
1453         dc.rwmap = rwmap;
1454         dc.conn = op->o_conn;
1455         dc.rs = NULL;
1456         dc.ctx = "searchEntryDN";
1457
1458         e = rs->sr_entry;
1459         flags = rs->sr_flags;
1460         if ( !( rs->sr_flags & REP_ENTRY_MODIFIABLE ) ) {
1461                 /* FIXME: all we need to duplicate are:
1462                  * - dn
1463                  * - ndn
1464                  * - attributes that are requested
1465                  * - no values if attrsonly is set
1466                  */
1467
1468                 e = entry_dup( e );
1469                 if ( e == NULL ) {
1470                         rc = LDAP_NO_MEMORY;
1471                         goto fail;
1472                 }
1473
1474                 flags &= ~REP_ENTRY_MUSTRELEASE;
1475                 flags |= ( REP_ENTRY_MODIFIABLE | REP_ENTRY_MUSTBEFREED );
1476         }
1477
1478         /*
1479          * Note: this may fail if the target host(s) schema differs
1480          * from the one known to the meta, and a DN with unknown
1481          * attributes is returned.
1482          */
1483         dn = e->e_name;
1484         ndn = e->e_nname;
1485         rc = rwm_dn_massage_pretty_normalize( &dc, &e->e_name, &dn, &ndn );
1486         if ( rc != LDAP_SUCCESS ) {
1487                 rc = 1;
1488                 goto fail;
1489         }
1490
1491         if ( e->e_name.bv_val != dn.bv_val ) {
1492                 ch_free( e->e_name.bv_val );
1493                 ch_free( e->e_nname.bv_val );
1494
1495                 e->e_name = dn;
1496                 e->e_nname = ndn;
1497         }
1498
1499         /* TODO: map entry attribute types, objectclasses
1500          * and dn-valued attribute values */
1501
1502         /* FIXME: the entries are in the remote mapping form;
1503          * so we need to select those attributes we are willing
1504          * to return, and remap them accordingly */
1505         (void)rwm_attrs( op, rs, &e->e_attrs, 1 );
1506
1507         if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
1508                 overlay_entry_release_ov( op, rs->sr_entry, 0, on );
1509         }
1510
1511         rs->sr_entry = e;
1512         rs->sr_flags = flags;
1513
1514         return SLAP_CB_CONTINUE;
1515
1516 fail:;
1517         if ( e != NULL && e != rs->sr_entry ) {
1518                 if ( e->e_name.bv_val == dn.bv_val ) {
1519                         BER_BVZERO( &e->e_name );
1520                 }
1521
1522                 if ( e->e_nname.bv_val == ndn.bv_val ) {
1523                         BER_BVZERO( &e->e_nname );
1524                 }
1525
1526                 entry_free( e );
1527         }
1528
1529         if ( !BER_BVISNULL( &dn ) ) {
1530                 ch_free( dn.bv_val );
1531         }
1532
1533         if ( !BER_BVISNULL( &ndn ) ) {
1534                 ch_free( ndn.bv_val );
1535         }
1536
1537         return rc;
1538 }
1539
1540 static int
1541 rwm_operational( Operation *op, SlapReply *rs )
1542 {
1543         /* FIXME: the entries are in the remote mapping form;
1544          * so we need to select those attributes we are willing
1545          * to return, and remap them accordingly */
1546         if ( rs->sr_operational_attrs ) {
1547                 rwm_attrs( op, rs, &rs->sr_operational_attrs, 1 );
1548         }
1549
1550         return SLAP_CB_CONTINUE;
1551 }
1552
1553 #if 0
1554 /* don't use this; it cannot be reverted, and leaves op->o_req_dn
1555  * rewritten for subsequent operations; fine for plain suffixmassage,
1556  * but destroys everything else */
1557 static int
1558 rwm_chk_referrals( Operation *op, SlapReply *rs )
1559 {
1560         slap_overinst           *on = (slap_overinst *) op->o_bd->bd_info;
1561         int                     rc;
1562
1563         rc = rwm_op_dn_massage( op, rs, "referralCheckDN" );
1564         if ( rc != LDAP_SUCCESS ) {
1565                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1566                 send_ldap_error( op, rs, rc, "referralCheckDN massage error" );
1567                 return -1;
1568         }
1569
1570         return SLAP_CB_CONTINUE;
1571 }
1572 #endif
1573
1574 static int
1575 rwm_rw_config(
1576         BackendDB       *be,
1577         const char      *fname,
1578         int             lineno,
1579         int             argc,
1580         char            **argv )
1581 {
1582         slap_overinst           *on = (slap_overinst *) be->bd_info;
1583         struct ldaprwmap        *rwmap =
1584                         (struct ldaprwmap *)on->on_bi.bi_private;
1585
1586         return rewrite_parse( rwmap->rwm_rw,
1587                                 fname, lineno, argc, argv );
1588
1589         return 0;
1590 }
1591
1592 static int
1593 rwm_suffixmassage_config(
1594         BackendDB       *be,
1595         const char      *fname,
1596         int             lineno,
1597         int             argc,
1598         char            **argv )
1599 {
1600         slap_overinst           *on = (slap_overinst *) be->bd_info;
1601         struct ldaprwmap        *rwmap =
1602                         (struct ldaprwmap *)on->on_bi.bi_private;
1603
1604         struct berval           bvnc, nvnc, pvnc, brnc, nrnc, prnc;
1605         int                     massaged;
1606         int                     rc;
1607
1608         /*
1609          * syntax:
1610          *
1611          *      suffixmassage [<suffix>] <massaged suffix>
1612          *
1613          * the [<suffix>] field must be defined as a valid suffix
1614          * for the current database;
1615          * the <massaged suffix> shouldn't have already been
1616          * defined as a valid suffix for the current server
1617          */
1618         if ( argc == 2 ) {
1619                 if ( be->be_suffix == NULL ) {
1620                         fprintf( stderr, "%s: line %d: "
1621                                        " \"suffixMassage [<suffix>]"
1622                                        " <massaged suffix>\" without "
1623                                        "<suffix> part requires database "
1624                                        "suffix be defined first.\n",
1625                                 fname, lineno );
1626                         return 1;
1627                 }
1628                 bvnc = be->be_suffix[ 0 ];
1629                 massaged = 1;
1630
1631         } else if ( argc == 3 ) {
1632                 ber_str2bv( argv[ 1 ], 0, 0, &bvnc );
1633                 massaged = 2;
1634
1635         } else  {
1636                 fprintf( stderr, "%s: line %d: syntax is"
1637                                " \"suffixMassage [<suffix>]"
1638                                " <massaged suffix>\"\n",
1639                         fname, lineno );
1640                 return 1;
1641         }
1642
1643         if ( dnPrettyNormal( NULL, &bvnc, &pvnc, &nvnc, NULL ) != LDAP_SUCCESS ) {
1644                 fprintf( stderr, "%s: line %d: suffix DN %s is invalid\n",
1645                         fname, lineno, bvnc.bv_val );
1646                 return 1;
1647         }
1648
1649         ber_str2bv( argv[ massaged ], 0, 0, &brnc );
1650         if ( dnPrettyNormal( NULL, &brnc, &prnc, &nrnc, NULL ) != LDAP_SUCCESS ) {
1651                 fprintf( stderr, "%s: line %d: suffix DN %s is invalid\n",
1652                                 fname, lineno, brnc.bv_val );
1653                 free( nvnc.bv_val );
1654                 free( pvnc.bv_val );
1655                 return 1;
1656         }
1657
1658         /*
1659          * The suffix massaging is emulated
1660          * by means of the rewrite capabilities
1661          */
1662         rc = rwm_suffix_massage_config( rwmap->rwm_rw,
1663                         &pvnc, &nvnc, &prnc, &nrnc );
1664         free( nvnc.bv_val );
1665         free( pvnc.bv_val );
1666         free( nrnc.bv_val );
1667         free( prnc.bv_val );
1668
1669         return rc;
1670 }
1671
1672 static int
1673 rwm_m_config(
1674         BackendDB       *be,
1675         const char      *fname,
1676         int             lineno,
1677         int             argc,
1678         char            **argv )
1679 {
1680         slap_overinst           *on = (slap_overinst *) be->bd_info;
1681         struct ldaprwmap        *rwmap =
1682                         (struct ldaprwmap *)on->on_bi.bi_private;
1683
1684         /* objectclass/attribute mapping */
1685         return rwm_map_config( &rwmap->rwm_oc,
1686                         &rwmap->rwm_at,
1687                         fname, lineno, argc, argv );
1688 }
1689
1690 static int
1691 rwm_response( Operation *op, SlapReply *rs )
1692 {
1693         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1694         struct ldaprwmap        *rwmap =
1695                         (struct ldaprwmap *)on->on_bi.bi_private;
1696
1697         int             rc;
1698
1699         if ( op->o_tag == LDAP_REQ_SEARCH && rs->sr_type == REP_SEARCH ) {
1700                 return rwm_send_entry( op, rs );
1701         }
1702
1703         switch( op->o_tag ) {
1704         case LDAP_REQ_SEARCH:
1705         case LDAP_REQ_BIND:
1706         case LDAP_REQ_ADD:
1707         case LDAP_REQ_DELETE:
1708         case LDAP_REQ_MODRDN:
1709         case LDAP_REQ_MODIFY:
1710         case LDAP_REQ_COMPARE:
1711         case LDAP_REQ_EXTENDED:
1712                 if ( rs->sr_ref ) {
1713                         dncookie                dc;
1714
1715                         /*
1716                          * Rewrite the dn of the referrals, if needed
1717                          */
1718                         dc.rwmap = rwmap;
1719                         dc.conn = op->o_conn;
1720                         dc.rs = NULL;
1721                         dc.ctx = "referralDN";
1722                         rc = rwm_referral_result_rewrite( &dc, rs->sr_ref );
1723                         if ( rc != LDAP_SUCCESS ) {
1724                                 rc = 1;
1725                                 break;
1726                         }
1727                 }
1728                 rc = rwm_matched( op, rs );
1729                 break;
1730
1731         default:
1732                 rc = SLAP_CB_CONTINUE;
1733                 break;
1734         }
1735
1736         return rc;
1737 }
1738
1739 static int
1740 rwm_db_config(
1741         BackendDB       *be,
1742         const char      *fname,
1743         int             lineno,
1744         int             argc,
1745         char            **argv )
1746 {
1747         slap_overinst           *on = (slap_overinst *) be->bd_info;
1748         struct ldaprwmap        *rwmap =
1749                         (struct ldaprwmap *)on->on_bi.bi_private;
1750
1751         int             rc = 0;
1752         char            *argv0 = NULL;
1753
1754         if ( strncasecmp( argv[ 0 ], "rwm-", STRLENOF( "rwm-" ) ) == 0 ) {
1755                 argv0 = argv[ 0 ];
1756                 argv[ 0 ] = &argv0[ STRLENOF( "rwm-" ) ];
1757         }
1758
1759         if ( strncasecmp( argv[0], "rewrite", STRLENOF("rewrite") ) == 0 ) {
1760                 rc = rwm_rw_config( be, fname, lineno, argc, argv );
1761
1762         } else if ( strcasecmp( argv[0], "map" ) == 0 ) {
1763                 rc = rwm_m_config( be, fname, lineno, argc, argv );
1764
1765         } else if ( strcasecmp( argv[0], "suffixmassage" ) == 0 ) {
1766                 rc = rwm_suffixmassage_config( be, fname, lineno, argc, argv );
1767
1768         } else if ( strcasecmp( argv[0], "t-f-support" ) == 0 ) {
1769                 if ( argc != 2 ) {
1770                         fprintf( stderr,
1771                 "%s: line %d: \"t-f-support {no|yes|discover}\" needs 1 argument.\n",
1772                                         fname, lineno );
1773                         return( 1 );
1774                 }
1775
1776                 if ( strcasecmp( argv[ 1 ], "no" ) == 0 ) {
1777                         rwmap->rwm_flags &= ~(RWM_F_SUPPORT_T_F_MASK2);
1778
1779                 } else if ( strcasecmp( argv[ 1 ], "yes" ) == 0 ) {
1780                         rwmap->rwm_flags |= RWM_F_SUPPORT_T_F;
1781
1782                 /* TODO: not implemented yet */
1783                 } else if ( strcasecmp( argv[ 1 ], "discover" ) == 0 ) {
1784                         fprintf( stderr,
1785                 "%s: line %d: \"discover\" not supported yet "
1786                 "in \"t-f-support {no|yes|discover}\".\n",
1787                                         fname, lineno );
1788                         return( 1 );
1789 #if 0
1790                         rwmap->rwm_flags |= RWM_F_SUPPORT_T_F_DISCOVER;
1791 #endif
1792
1793                 } else {
1794                         fprintf( stderr,
1795         "%s: line %d: unknown value \"%s\" for \"t-f-support {no|yes|discover}\".\n",
1796                                 fname, lineno, argv[ 1 ] );
1797                         return 1;
1798                 }
1799
1800         } else if ( strcasecmp( argv[0], "normalize-mapped-attrs" ) ==  0 ) {
1801                 if ( argc !=2 ) {
1802                         fprintf( stderr,
1803                 "%s: line %d: \"normalize-mapped-attrs {no|yes}\" needs 1 argument.\n",
1804                                         fname, lineno );
1805                         return( 1 );
1806                 }
1807
1808                 if ( strcasecmp( argv[ 1 ], "no" ) == 0 ) {
1809                         rwmap->rwm_flags &= ~(RWM_F_NORMALIZE_MAPPED_ATTRS);
1810
1811                 } else if ( strcasecmp( argv[ 1 ], "yes" ) == 0 ) {
1812                         rwmap->rwm_flags |= RWM_F_NORMALIZE_MAPPED_ATTRS;
1813                 }
1814
1815         } else {
1816                 rc = SLAP_CONF_UNKNOWN;
1817         }
1818
1819         if ( argv0 ) {
1820                 argv[ 0 ] = argv0;
1821         }
1822
1823         return rc;
1824 }
1825
1826 /*
1827  * dynamic configuration...
1828  */
1829
1830 enum {
1831         /* rewrite */
1832         RWM_CF_REWRITE = 1,
1833
1834         /* map */
1835         RWM_CF_MAP,
1836         RWM_CF_T_F_SUPPORT,
1837         RWM_CF_NORMALIZE_MAPPED,
1838
1839         RWM_CF_LAST
1840 };
1841
1842 static slap_verbmasks t_f_mode[] = {
1843         { BER_BVC( "true" ),            RWM_F_SUPPORT_T_F },
1844         { BER_BVC( "yes" ),             RWM_F_SUPPORT_T_F },
1845         { BER_BVC( "discover" ),        RWM_F_SUPPORT_T_F_DISCOVER },
1846         { BER_BVC( "false" ),           RWM_F_NONE },
1847         { BER_BVC( "no" ),              RWM_F_NONE },
1848         { BER_BVNULL,                   0 }
1849 };
1850
1851 static ConfigDriver rwm_cf_gen;
1852
1853 static ConfigTable rwmcfg[] = {
1854         { "rwm-rewrite", "rewrite",
1855                 2, 0, STRLENOF("rwm-rewrite"),
1856                 ARG_MAGIC|RWM_CF_REWRITE, rwm_cf_gen,
1857                 "( OLcfgOvAt:16.1 NAME 'olcRwmRewrite' "
1858                         "DESC 'Rewrites strings' "
1859                         "EQUALITY caseIgnoreMatch "
1860                         "SYNTAX OMsDirectoryString "
1861                         "X-ORDERED 'VALUES' )",
1862                 NULL, NULL },
1863
1864         { "rwm-suffixmassage", "[virtual]> <real",
1865                 2, 3, 0, ARG_MAGIC|RWM_CF_REWRITE, rwm_cf_gen,
1866                 NULL, NULL, NULL },
1867
1868         { "rwm-t-f-support", "true|false|discover",
1869                 2, 2, 0, ARG_MAGIC|RWM_CF_T_F_SUPPORT, rwm_cf_gen,
1870                 "( OLcfgOvAt:16.2 NAME 'olcRwmTFSupport' "
1871                         "DESC 'Absolute filters support' "
1872                         "SYNTAX OMsDirectoryString "
1873                         "SINGLE-VALUE )",
1874                 NULL, NULL },
1875
1876         { "rwm-map", "{objectClass|attribute}",
1877                 2, 4, 0, ARG_MAGIC|RWM_CF_MAP, rwm_cf_gen,
1878                 "( OLcfgOvAt:16.3 NAME 'olcRwmMap' "
1879                         "DESC 'maps attributes/objectClasses' "
1880                         "SYNTAX OMsDirectoryString "
1881                         "X-ORDERED 'VALUES' )",
1882                 NULL, NULL },
1883
1884         { "rwm-normalize-mapped-attrs", "true|false",
1885                 2, 2, 0, ARG_MAGIC|ARG_ON_OFF|RWM_CF_NORMALIZE_MAPPED, rwm_cf_gen,
1886                 "( OLcfgOvAt:16.4 NAME 'olcRwmNormalizeMapped' "
1887                         "DESC 'Normalize mapped attributes/objectClasses' "
1888                         "SYNTAX OMsBoolean "
1889                         "SINGLE-VALUE )",
1890                 NULL, NULL },
1891
1892         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
1893 };
1894
1895 static ConfigOCs rwmocs[] = {
1896         { "( OLcfgOvOc:16.1 "
1897                 "NAME 'olcRwmConfig' "
1898                 "DESC 'Rewrite/remap configuration' "
1899                 "SUP olcOverlayConfig "
1900                 "MAY ( "
1901                         "olcRwmRewrite $ "
1902                         "olcRwmTFSupport $ "
1903                         "olcRwmMap $ "
1904                         "olcRwmNormalizeMapped "
1905                         ") )",
1906                 Cft_Overlay, rwmcfg, NULL, NULL },
1907         { NULL, 0, NULL }
1908 };
1909
1910 static void
1911 slap_rewrite_unparse( BerVarray in, BerVarray *out )
1912 {
1913         int             i;
1914         BerVarray       bva = NULL;
1915         char            ibuf[32], *ptr;
1916         struct berval   idx;
1917
1918         assert( in != NULL );
1919
1920         for ( i = 0; !BER_BVISNULL( &in[i] ); i++ )
1921                 /* count'em */ ;
1922
1923         if ( i == 0 ) {
1924                 return;
1925         }
1926
1927         idx.bv_val = ibuf;
1928
1929         bva = ch_malloc( ( i + 1 ) * sizeof(struct berval) );
1930         BER_BVZERO( &bva[ 0 ] );
1931
1932         for ( i = 0; !BER_BVISNULL( &in[i] ); i++ ) {
1933                 idx.bv_len = snprintf( idx.bv_val, sizeof( ibuf ), "{%d}", i );
1934                 if ( idx.bv_len >= sizeof( ibuf ) ) {
1935                         ber_bvarray_free( bva );
1936                         return;
1937                 }
1938
1939                 bva[i].bv_len = idx.bv_len + in[i].bv_len;
1940                 bva[i].bv_val = ch_malloc( bva[i].bv_len + 1 );
1941                 ptr = lutil_strcopy( bva[i].bv_val, ibuf );
1942                 ptr = lutil_strcopy( ptr, in[i].bv_val );
1943                 *ptr = '\0';
1944                 BER_BVZERO( &bva[ i + 1 ] );
1945         }
1946
1947         *out = bva;
1948 }
1949
1950 static int
1951 rwm_cf_gen( ConfigArgs *c )
1952 {
1953         slap_overinst           *on = (slap_overinst *)c->bi;
1954         struct ldaprwmap        *rwmap =
1955                         (struct ldaprwmap *)on->on_bi.bi_private;
1956
1957         BackendDB               db;
1958         char                    *argv0;
1959         int                     idx0 = 0;
1960         int                     rc = 0;
1961
1962         db = *c->be;
1963         db.bd_info = c->bi;
1964
1965         if ( c->op == SLAP_CONFIG_EMIT ) {
1966                 struct berval   bv = BER_BVNULL;
1967
1968                 switch ( c->type ) {
1969                 case RWM_CF_REWRITE:
1970                         if ( rwmap->rwm_bva_rewrite == NULL ) {
1971                                 rc = 1;
1972
1973                         } else {
1974                                 slap_rewrite_unparse( rwmap->rwm_bva_rewrite, &c->rvalue_vals );
1975                                 if ( !c->rvalue_vals ) {
1976                                         rc = 1;
1977                                 }
1978                         }
1979                         break;
1980
1981                 case RWM_CF_T_F_SUPPORT:
1982                         enum_to_verb( t_f_mode, (rwmap->rwm_flags & RWM_F_SUPPORT_T_F_MASK2), &bv );
1983                         if ( BER_BVISNULL( &bv ) ) {
1984                                 /* there's something wrong... */
1985                                 assert( 0 );
1986                                 rc = 1;
1987
1988                         } else {
1989                                 value_add_one( &c->rvalue_vals, &bv );
1990                         }
1991                         break;
1992
1993                 case RWM_CF_MAP:
1994                         if ( rwmap->rwm_bva_map == NULL ) {
1995                                 rc = 1;
1996
1997                         } else {
1998                                 value_add( &c->rvalue_vals, rwmap->rwm_bva_map );
1999                         }
2000                         break;
2001
2002                 case RWM_CF_NORMALIZE_MAPPED:
2003                         c->value_int = ( rwmap->rwm_flags & RWM_F_NORMALIZE_MAPPED_ATTRS );
2004                         break;
2005
2006                 default:
2007                         assert( 0 );
2008                         rc = 1;
2009                 }
2010
2011                 return rc;
2012
2013         } else if ( c->op == LDAP_MOD_DELETE ) {
2014                 switch ( c->type ) {
2015                 case RWM_CF_REWRITE:
2016                         if ( c->valx >= 0 ) {
2017                                 /* single modification is not allowed */
2018                                 rc = 1;
2019
2020                         } else if ( rwmap->rwm_rw != NULL ) {
2021                                 rewrite_info_delete( &rwmap->rwm_rw );
2022                                 assert( rwmap->rwm_rw == NULL );
2023
2024                                 ber_bvarray_free( rwmap->rwm_bva_rewrite );
2025                                 rwmap->rwm_bva_rewrite = NULL;
2026                         }
2027                         break;
2028
2029                 case RWM_CF_T_F_SUPPORT:
2030                         rwmap->rwm_flags &= ~RWM_F_SUPPORT_T_F_MASK2;
2031                         break;
2032
2033                 case RWM_CF_MAP:
2034                         if ( c->valx >= 0 ) {
2035                                 /* single modification is not allowed */
2036                                 rc = 1;
2037
2038                         } else {
2039                                 avl_free( rwmap->rwm_oc.remap, rwm_mapping_dst_free );
2040                                 avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
2041                                 avl_free( rwmap->rwm_at.remap, rwm_mapping_dst_free );
2042                                 avl_free( rwmap->rwm_at.map, rwm_mapping_free );
2043
2044                                 rwmap->rwm_oc.remap = NULL;
2045                                 rwmap->rwm_oc.map = NULL;
2046                                 rwmap->rwm_at.remap = NULL;
2047                                 rwmap->rwm_at.map = NULL;
2048
2049                                 ber_bvarray_free( rwmap->rwm_bva_map );
2050                                 rwmap->rwm_bva_map = NULL;
2051                         }
2052                         break;
2053
2054                 case RWM_CF_NORMALIZE_MAPPED:
2055                         rwmap->rwm_flags &= ~RWM_F_NORMALIZE_MAPPED_ATTRS;
2056                         break;
2057
2058                 default:
2059                         return 1;
2060                 }
2061                 return rc;
2062         }
2063
2064         if ( strncasecmp( c->argv[ 0 ], "olcRwm", STRLENOF( "olcRwm" ) ) == 0 ) {
2065                 idx0 = 1;
2066         }
2067
2068         switch ( c->type ) {
2069         case RWM_CF_REWRITE:
2070                 argv0 = c->argv[ idx0 ];
2071                 if ( strncasecmp( argv0, "rwm-", STRLENOF( "rwm-" ) ) != 0 ) {
2072                         return 1;
2073                 }
2074                 c->argv[ idx0 ] += STRLENOF( "rwm-" );
2075                 if ( strcasecmp( c->argv[ idx0 ], "suffixmassage" ) == 0 ) {
2076                         rc = rwm_suffixmassage_config( &db, c->fname, c->lineno,
2077                                 c->argc - idx0, &c->argv[ idx0 ] );
2078
2079                 } else {
2080                         rc = rwm_rw_config( &db, c->fname, c->lineno,
2081                                 c->argc - idx0, &c->argv[ idx0 ] );
2082                 }
2083                 c->argv[ idx0 ] = argv0;
2084                 if ( rc ) {
2085                         return 1;
2086
2087                 } else {
2088                         char            *line;
2089                         struct berval   bv;
2090
2091                         line = ldap_charray2str( &c->argv[ idx0 ], "\" \"" );
2092                         if ( line != NULL ) {
2093                                 int     len = strlen( c->argv[ idx0 ] );
2094
2095                                 ber_str2bv( line, 0, 0, &bv );
2096                                 AC_MEMCPY( &bv.bv_val[ len ], &bv.bv_val[ len + 1 ],
2097                                         bv.bv_len - ( len + 1 ) );
2098                                 bv.bv_val[ bv.bv_len - 1 ] = '"';
2099                                 ber_bvarray_add( &rwmap->rwm_bva_rewrite, &bv );
2100                         }
2101                 }
2102                 break;
2103
2104         case RWM_CF_T_F_SUPPORT:
2105                 rc = verb_to_mask( c->argv[ 1 ], t_f_mode );
2106                 if ( BER_BVISNULL( &t_f_mode[ rc ].word ) ) {
2107                         return 1;
2108                 }
2109
2110                 rwmap->rwm_flags &= ~RWM_F_SUPPORT_T_F_MASK2;
2111                 rwmap->rwm_flags |= t_f_mode[ rc ].mask;
2112                 rc = 0;
2113                 break;
2114
2115         case RWM_CF_MAP:
2116                 argv0 = c->argv[ 0 ];
2117                 c->argv[ 0 ] += STRLENOF( "rwm-" );
2118                 rc = rwm_m_config( &db, c->fname, c->lineno, c->argc, c->argv );
2119                 c->argv[ 0 ] = argv0;
2120                 if ( rc ) {
2121                         return 1;
2122
2123                 } else {
2124                         char            *line;
2125                         struct berval   bv;
2126
2127                         line = ldap_charray2str( &c->argv[ 1 ], " " );
2128                         if ( line != NULL ) {
2129                                 ber_str2bv( line, 0, 0, &bv );
2130                                 ber_bvarray_add( &rwmap->rwm_bva_map, &bv );
2131                         }
2132                 }
2133                 break;
2134
2135         case RWM_CF_NORMALIZE_MAPPED:
2136                 if ( c->value_int ) {
2137                         rwmap->rwm_flags |= RWM_F_NORMALIZE_MAPPED_ATTRS;
2138                 } else {
2139                         rwmap->rwm_flags &= ~RWM_F_NORMALIZE_MAPPED_ATTRS;
2140                 }
2141                 break;
2142
2143         default:
2144                 assert( 0 );
2145                 return 1;
2146         }
2147
2148         return rc;
2149 }
2150
2151 static int
2152 rwm_db_init(
2153         BackendDB       *be,
2154         ConfigReply     *cr )
2155 {
2156         slap_overinst           *on = (slap_overinst *) be->bd_info;
2157         struct ldaprwmap        *rwmap;
2158         char                    *rargv[ 3 ];
2159         int                     rc = 0;
2160
2161         rwmap = (struct ldaprwmap *)ch_calloc( 1, sizeof( struct ldaprwmap ) );
2162
2163         rwmap->rwm_rw = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
2164         if ( rwmap->rwm_rw == NULL ) {
2165                 rc = -1;
2166                 goto error_return;
2167         }
2168
2169         /* this rewriteContext by default must be null;
2170          * rules can be added if required */
2171         rargv[ 0 ] = "rewriteContext";
2172         rargv[ 1 ] = "searchFilter";
2173         rargv[ 2 ] = NULL;
2174         rewrite_parse( rwmap->rwm_rw, "<suffix massage>", 1, 2, rargv );
2175
2176         rargv[ 0 ] = "rewriteContext";
2177         rargv[ 1 ] = "default";
2178         rargv[ 2 ] = NULL;
2179         rewrite_parse( rwmap->rwm_rw, "<suffix massage>", 2, 2, rargv );
2180
2181 error_return:;
2182         on->on_bi.bi_private = (void *)rwmap;
2183
2184         if ( rc ) {
2185                 (void)rwm_db_destroy( be, NULL );
2186         }
2187
2188         return rc;
2189 }
2190
2191 static int
2192 rwm_db_destroy(
2193         BackendDB       *be,
2194         ConfigReply     *cr )
2195 {
2196         slap_overinst   *on = (slap_overinst *) be->bd_info;
2197         int             rc = 0;
2198
2199         if ( on->on_bi.bi_private ) {
2200                 struct ldaprwmap        *rwmap =
2201                         (struct ldaprwmap *)on->on_bi.bi_private;
2202
2203                 if ( rwmap->rwm_rw ) {
2204                         rewrite_info_delete( &rwmap->rwm_rw );
2205                         ber_bvarray_free( rwmap->rwm_bva_rewrite );
2206                 }
2207
2208                 avl_free( rwmap->rwm_oc.remap, rwm_mapping_dst_free );
2209                 avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
2210                 avl_free( rwmap->rwm_at.remap, rwm_mapping_dst_free );
2211                 avl_free( rwmap->rwm_at.map, rwm_mapping_free );
2212                 ber_bvarray_free( rwmap->rwm_bva_map );
2213
2214                 ch_free( rwmap );
2215         }
2216
2217         return rc;
2218 }
2219
2220 static slap_overinst rwm = { { NULL } };
2221
2222 #if SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC
2223 static
2224 #endif /* SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC */
2225 int
2226 rwm_initialize( void )
2227 {
2228         int             rc;
2229
2230         /* Make sure we don't exceed the bits reserved for userland */
2231         config_check_userland( RWM_CF_LAST );
2232
2233         memset( &rwm, 0, sizeof( slap_overinst ) );
2234
2235         rwm.on_bi.bi_type = "rwm";
2236         rwm.on_bi.bi_flags =
2237                 SLAPO_BFLAG_SINGLE |
2238                 0;
2239
2240         rwm.on_bi.bi_db_init = rwm_db_init;
2241         rwm.on_bi.bi_db_config = rwm_db_config;
2242         rwm.on_bi.bi_db_destroy = rwm_db_destroy;
2243
2244         rwm.on_bi.bi_op_bind = rwm_op_bind;
2245         rwm.on_bi.bi_op_search = rwm_op_search;
2246         rwm.on_bi.bi_op_compare = rwm_op_compare;
2247         rwm.on_bi.bi_op_modify = rwm_op_modify;
2248         rwm.on_bi.bi_op_modrdn = rwm_op_modrdn;
2249         rwm.on_bi.bi_op_add = rwm_op_add;
2250         rwm.on_bi.bi_op_delete = rwm_op_delete;
2251         rwm.on_bi.bi_op_unbind = rwm_op_unbind;
2252         rwm.on_bi.bi_extended = rwm_extended;
2253 #if 1 /* TODO */
2254         rwm.on_bi.bi_entry_release_rw = rwm_entry_release_rw;
2255         rwm.on_bi.bi_entry_get_rw = rwm_entry_get_rw;
2256 #endif
2257
2258         rwm.on_bi.bi_operational = rwm_operational;
2259         rwm.on_bi.bi_chk_referrals = 0 /* rwm_chk_referrals */ ;
2260
2261         rwm.on_bi.bi_connection_init = rwm_conn_init;
2262         rwm.on_bi.bi_connection_destroy = rwm_conn_destroy;
2263
2264         rwm.on_response = rwm_response;
2265
2266         rwm.on_bi.bi_cf_ocs = rwmocs;
2267
2268         rc = config_register_schema( rwmcfg, rwmocs );
2269         if ( rc ) {
2270                 return rc;
2271         }
2272
2273         return overlay_register( &rwm );
2274 }
2275
2276 #if SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC
2277 int
2278 init_module( int argc, char *argv[] )
2279 {
2280         return rwm_initialize();
2281 }
2282 #endif /* SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC */
2283
2284 #endif /* SLAPD_OVER_RWM */