git.sur5r.net Git - openldap/blob - servers/slapd/slapi/slapi_overlay.c

   1 /* slapi_overlay.c - SLAPI overlay */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2001-2005 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* ACKNOWLEDGEMENTS:
  17  * This work was initially developed by Luke Howard for inclusion
  18  * in OpenLDAP Software.
  19  */
  20
  21 #include "portable.h"
  22
  23 #include <stdio.h>
  24
  25 #include <ac/string.h>
  26 #include <ac/socket.h>
  27
  28 #include "slap.h"
  29 #include "slapi.h"
  30
  31 #ifdef LDAP_SLAPI
  32
  33 static slap_overinst slapi;
  34
  35 static int slapi_over_response( Operation *op, SlapReply *rs );
  36 static int slapi_over_cleanup( Operation *op, SlapReply *rs );
  37
  38 static Slapi_PBlock *
  39 slapi_over_pblock_new ( Operation *op )
  40 {
  41         Slapi_PBlock            *pb;
  42
  43         pb = slapi_pblock_new();
  44         if ( pb == NULL ) {
  45                 return NULL;
  46         }
  47
  48         pb->pop = op;
  49         pb->pconn = op->o_conn;
  50         pb->internal_op = 0;
  51
  52         PBLOCK_ASSERT_OP( pb, 0 );
  53
  54         return pb;
  55 }
  56
  57 static int
  58 slapi_op_internal_p( Operation *op, slap_callback *cb )
  59 {
  60         int                     internal_op = 0;
  61         Slapi_PBlock            *pb = NULL;
  62         slap_callback           *pcb;
  63
  64         /*
  65          * Abstraction violating check for SLAPI internal operations
  66          * allows pblock to remain consistent when invoking internal
  67          * op plugins
  68          */
  69         for ( pcb = op->o_callback; pcb != NULL; pcb = pcb->sc_next ) {
  70                 if ( pcb->sc_response == slapi_int_response ) {
  71                         pb = (Slapi_PBlock *)pcb->sc_private;
  72                         PBLOCK_ASSERT_INTOP( pb, 0 );
  73                         internal_op = 1;
  74                         break;
  75                 }
  76         }
  77
  78         if ( cb != NULL ) {
  79                 if ( pb == NULL ) {
  80                         pb = slapi_over_pblock_new( op );
  81                 }
  82
  83                 cb->sc_response = slapi_over_response;
  84                 cb->sc_cleanup = slapi_over_cleanup;
  85                 cb->sc_private = pb;
  86                 cb->sc_next = op->o_callback;
  87                 op->o_callback = cb;
  88         }
  89
  90         return internal_op;
  91 }
  92
  93 static int
  94 slapi_over_compute_output(
  95         computed_attr_context *c,
  96         Slapi_Attr *attribute,
  97         Slapi_Entry *entry
  98 )
  99 {
 100         Attribute               **a;
 101         AttributeDescription    *desc;
 102         SlapReply               *rs = (SlapReply *)c->cac_private;
 103
 104         if ( c == NULL || attribute == NULL || entry == NULL ) {
 105                 return 0;
 106         }
 107
 108         assert( rs->sr_entry == entry );
 109
 110         desc = attribute->a_desc;
 111
 112         if ( rs->sr_attrs == NULL ) {
 113                 /* All attrs request, skip operational attributes */
 114                 if ( is_at_operational( desc->ad_type ) ) {
 115                         return 0;
 116                 }
 117         } else {
 118                 /* Specific attributes requested */
 119                 if ( is_at_operational( desc->ad_type ) ) {
 120                         if ( !SLAP_OPATTRS( rs->sr_attr_flags ) &&
 121                              !ad_inlist( desc, rs->sr_attrs ) ) {
 122                                 return 0;
 123                         }
 124                 } else {
 125                         if ( !SLAP_USERATTRS( rs->sr_attr_flags ) &&
 126                              !ad_inlist( desc, rs->sr_attrs ) ) {
 127                                 return 0;
 128                         }
 129                 }
 130         }
 131
 132         /* XXX perhaps we should check for existing attributes and merge */
 133         for ( a = &rs->sr_operational_attrs; *a != NULL; a = &(*a)->a_next )
 134                 ;
 135
 136         *a = slapi_attr_dup( attribute );
 137
 138         return 0;
 139 }
 140
 141 static int
 142 slapi_over_aux_operational( Operation *op, SlapReply *rs )
 143 {
 144         /* Support for computed attribute plugins */
 145         computed_attr_context    ctx;
 146         AttributeName           *anp;
 147
 148         if ( slapi_op_internal_p( op, NULL ) ) {
 149                 return SLAP_CB_CONTINUE;
 150         }
 151
 152         ctx.cac_pb = slapi_over_pblock_new( op );
 153         ctx.cac_op = op;
 154         ctx.cac_private = rs;
 155
 156         if ( rs->sr_entry != NULL ) {
 157                 /*
 158                  * For each client requested attribute, call the plugins.
 159                  */
 160                 if ( rs->sr_attrs != NULL ) {
 161                         for ( anp = rs->sr_attrs; anp->an_name.bv_val != NULL; anp++ ) {
 162                                 if ( compute_evaluator( &ctx, anp->an_name.bv_val,
 163                                         rs->sr_entry, slapi_over_compute_output ) == 1 ) {
 164                                         break;
 165                                 }
 166                         }
 167                 } else {
 168                         /*
 169                          * Technically we shouldn't be returning operational attributes
 170                          * when the user requested only user attributes. We'll let the
 171                          * plugin decide whether to be naughty or not.
 172                          */
 173                         compute_evaluator( &ctx, "*", rs->sr_entry, slapi_over_compute_output );
 174                 }
 175         }
 176
 177         slapi_pblock_destroy( ctx.cac_pb );
 178
 179         return SLAP_CB_CONTINUE;
 180 }
 181
 182 static int
 183 slapi_over_search( Operation *op, SlapReply *rs, int type )
 184 {
 185         int                     rc;
 186         Slapi_PBlock            *pb;
 187
 188         assert( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF );
 189
 190         /* create a new pblock to not trample on result controls */
 191         pb = slapi_over_pblock_new( op );
 192
 193         rc = slapi_int_call_plugins( op->o_bd, type, pb );
 194         if ( rc >= 0 ) /* 1 means no plugins called */
 195                 rc = SLAP_CB_CONTINUE;
 196         else
 197                 rc = LDAP_SUCCESS; /* confusing: don't abort, but don't send */
 198
 199         slapi_pblock_destroy(pb);
 200
 201         return rc;
 202 }
 203
 204 /*
 205  * Call pre- and post-result plugins
 206  */
 207 static int
 208 slapi_over_result( Operation *op, SlapReply *rs, int type )
 209 {
 210         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 211
 212         assert( rs->sr_type == REP_RESULT );
 213
 214         slapi_int_call_plugins( op->o_bd, type, pb );
 215
 216         return SLAP_CB_CONTINUE;
 217 }
 218
 219
 220 static int
 221 slapi_op_bind_callback( Operation *op, SlapReply *rs, int prc )
 222 {
 223         switch ( prc ) {
 224         case SLAPI_BIND_SUCCESS:
 225                 /* Continue with backend processing */
 226                 break;
 227         case SLAPI_BIND_FAIL:
 228                 /* Failure, frontend (that's us) sends result */
 229                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 230                 send_ldap_result( op, rs );
 231                 return rs->sr_err;
 232                 break;
 233         case SLAPI_BIND_ANONYMOUS: /* undocumented */
 234         default: /* plugin sent result or no plugins called */
 235                 BER_BVZERO( &op->orb_edn );
 236
 237                 if ( rs->sr_err == LDAP_SUCCESS ) {
 238                         /*
 239                          * Plugin will have called slapi_pblock_set(LDAP_CONN_DN) which
 240                          * will have set conn->c_dn and conn->c_ndn
 241                          */
 242                         if ( BER_BVISNULL( &op->o_conn->c_ndn ) && prc == 1 ) {
 243                                 /* No plugins were called; continue processing */
 244                                 return LDAP_SUCCESS;
 245                         }
 246                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 247                         if ( !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
 248                                 ber_len_t max = sockbuf_max_incoming_auth;
 249                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
 250                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
 251                         }
 252                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 253
 254                         /* log authorization identity */
 255                         Statslog( LDAP_DEBUG_STATS,
 256                                 "%s BIND dn=\"%s\" mech=%s (SLAPI) ssf=0\n",
 257                                 op->o_log_prefix,
 258                                 BER_BVISNULL( &op->o_conn->c_dn )
 259                                         ? "<empty>" : op->o_conn->c_dn.bv_val,
 260                                 op->orb_tmp_mech.bv_val, 0, 0 );
 261
 262                         return -1;
 263                 }
 264                 break;
 265         }
 266
 267         return rs->sr_err;
 268 }
 269
 270 static int
 271 slapi_op_search_callback( Operation *op, SlapReply *rs, int prc )
 272 {
 273         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 274
 275         /* check preoperation result code */
 276         if ( prc < 0 ) {
 277                 return rs->sr_err;
 278         }
 279
 280         rs->sr_err = LDAP_SUCCESS;
 281
 282         if ( slapi_int_call_plugins( op->o_bd, SLAPI_PLUGIN_COMPUTE_SEARCH_REWRITER_FN, pb ) == 0 ) {
 283                 /*
 284                  * The plugin can set the SLAPI_SEARCH_FILTER.
 285                  * SLAPI_SEARCH_STRFILER is not normative.
 286                  */
 287                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 288                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
 289         }
 290
 291         return LDAP_SUCCESS;
 292 }
 293
 294 struct slapi_op_info {
 295         int soi_preop;                  /* preoperation plugin parameter */
 296         int soi_postop;                 /* postoperation plugin parameter */
 297         int soi_internal_preop;         /* internal preoperation plugin parameter */
 298         int soi_internal_postop;        /* internal postoperation plugin parameter */
 299         int (*soi_callback)(Operation *, SlapReply *, int); /* preoperation result handler */
 300 } slapi_op_dispatch_table[] = {
 301         {
 302                 SLAPI_PLUGIN_PRE_BIND_FN,
 303                 SLAPI_PLUGIN_POST_BIND_FN,
 304                 0,
 305                 0,
 306                 slapi_op_bind_callback
 307         },
 308         {
 309                 SLAPI_PLUGIN_PRE_UNBIND_FN,
 310                 SLAPI_PLUGIN_POST_UNBIND_FN,
 311                 0,
 312                 0,
 313                 NULL
 314         },
 315         {
 316                 SLAPI_PLUGIN_PRE_SEARCH_FN,
 317                 SLAPI_PLUGIN_POST_SEARCH_FN,
 318                 0,
 319                 0,
 320                 slapi_op_search_callback
 321         },
 322         {
 323                 SLAPI_PLUGIN_PRE_COMPARE_FN,
 324                 SLAPI_PLUGIN_POST_COMPARE_FN,
 325                 0,
 326                 0,
 327                 NULL
 328         },
 329         {
 330                 SLAPI_PLUGIN_PRE_MODIFY_FN,
 331                 SLAPI_PLUGIN_POST_MODIFY_FN,
 332                 SLAPI_PLUGIN_INTERNAL_PRE_MODIFY_FN,
 333                 SLAPI_PLUGIN_INTERNAL_POST_MODIFY_FN,
 334                 NULL
 335         },
 336         {
 337                 SLAPI_PLUGIN_PRE_MODRDN_FN,
 338                 SLAPI_PLUGIN_POST_MODRDN_FN,
 339                 SLAPI_PLUGIN_INTERNAL_PRE_MODRDN_FN,
 340                 SLAPI_PLUGIN_INTERNAL_POST_MODRDN_FN,
 341                 NULL
 342         },
 343         {
 344                 SLAPI_PLUGIN_PRE_ADD_FN,
 345                 SLAPI_PLUGIN_POST_ADD_FN,
 346                 SLAPI_PLUGIN_INTERNAL_PRE_ADD_FN,
 347                 SLAPI_PLUGIN_INTERNAL_POST_ADD_FN,
 348                 NULL
 349         },
 350         {
 351                 SLAPI_PLUGIN_PRE_DELETE_FN,
 352                 SLAPI_PLUGIN_POST_DELETE_FN,
 353                 SLAPI_PLUGIN_INTERNAL_PRE_DELETE_FN,
 354                 SLAPI_PLUGIN_INTERNAL_POST_DELETE_FN,
 355                 NULL
 356         },
 357         {
 358                 SLAPI_PLUGIN_PRE_ABANDON_FN,
 359                 SLAPI_PLUGIN_POST_ABANDON_FN,
 360                 0,
 361                 0,
 362                 NULL
 363         },
 364         {
 365                 0,
 366                 0,
 367                 0,
 368                 0,
 369                 NULL
 370         }
 371 };
 372
 373 slap_operation_t
 374 slapi_tag2op( ber_tag_t tag )
 375 {
 376         slap_operation_t op;
 377
 378         switch ( tag ) {
 379         case LDAP_REQ_BIND:
 380                 op = op_bind;
 381                 break;
 382         case LDAP_REQ_ADD:
 383                 op = op_add;
 384                 break;
 385         case LDAP_REQ_DELETE:
 386                 op = op_compare;
 387                 break;
 388         case LDAP_REQ_MODRDN:
 389                 op = op_modrdn;
 390                 break;
 391         case LDAP_REQ_MODIFY:
 392                 op = op_modify;
 393                 break;
 394         case LDAP_REQ_COMPARE:
 395                 op = op_compare;
 396                 break;
 397         case LDAP_REQ_SEARCH:
 398                 op = op_search;
 399                 break;
 400         case LDAP_REQ_UNBIND:
 401                 op = op_unbind;
 402                 break;
 403         default:
 404                 op = op_last;
 405                 break;
 406         }
 407
 408         return op;
 409 }
 410
 411 /* Add SLAPI_RESCONTROLS to rs->sr_ctrls, with care, because
 412  * rs->sr_ctrls could be allocated on the stack */
 413 static int
 414 slapi_over_merge_controls( Operation *op, SlapReply *rs )
 415 {
 416         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 417         LDAPControl             **ctrls = NULL;
 418         LDAPControl             **slapi_ctrls = NULL;
 419         size_t                  n_slapi_ctrls = 0;
 420         size_t                  n_rs_ctrls = 0;
 421         size_t                  i;
 422
 423         slapi_pblock_get( pb, SLAPI_RESCONTROLS, (void **)&slapi_ctrls );
 424
 425         n_slapi_ctrls = slapi_int_count_controls( slapi_ctrls );
 426         n_rs_ctrls = slapi_int_count_controls( rs->sr_ctrls );
 427
 428         slapi_pblock_set( pb, SLAPI_X_OLD_RESCONTROLS, (void *)rs->sr_ctrls );
 429
 430         if ( n_slapi_ctrls == 0 )
 431                 return LDAP_SUCCESS; /* no SLAPI controls */
 432
 433         ctrls = (LDAPControl **) op->o_tmpalloc(
 434                 ( n_slapi_ctrls + n_rs_ctrls + 1 ) * sizeof(LDAPControl *),
 435                 op->o_tmpmemctx );
 436
 437         for ( i = 0; i < n_slapi_ctrls; i++ ) {
 438                 ctrls[i] = slapi_ctrls[i];
 439         }
 440         if ( rs->sr_ctrls != NULL ) {
 441                 for ( i = 0; i < n_rs_ctrls; i++ ) {
 442                         ctrls[n_slapi_ctrls + i] = rs->sr_ctrls[i];
 443                 }
 444         }
 445
 446         rs->sr_ctrls = ctrls;
 447
 448         return LDAP_SUCCESS;
 449 }
 450
 451 static int
 452 slapi_over_unmerge_controls( Operation *op, SlapReply *rs )
 453 {
 454         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 455         LDAPControl             **rs_ctrls = NULL;
 456
 457         slapi_pblock_get( pb, SLAPI_X_OLD_RESCONTROLS, (void **)&rs_ctrls );
 458
 459         if ( rs->sr_ctrls == NULL || rs->sr_ctrls == rs_ctrls ) {
 460                 /* no copying done */
 461                 return LDAP_SUCCESS;
 462         }
 463
 464         op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 465         rs->sr_ctrls = rs_ctrls;
 466
 467         return LDAP_SUCCESS;
 468 }
 469
 470 static int
 471 slapi_over_response( Operation *op, SlapReply *rs )
 472 {
 473         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 474         int                     rc = SLAP_CB_CONTINUE;
 475
 476         if ( pb->internal_op == 0 ) {
 477                 switch ( rs->sr_type ) {
 478                 case REP_RESULT:
 479                         rc = slapi_over_result( op, rs, SLAPI_PLUGIN_PRE_RESULT_FN );
 480                         break;
 481                 case REP_SEARCH:
 482                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_ENTRY_FN );
 483                         break;
 484                 case REP_SEARCHREF:
 485                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_REFERRAL_FN );
 486                         break;
 487                 default:
 488                         break;
 489                 }
 490         }
 491
 492         slapi_over_merge_controls( op, rs );
 493
 494         return rc;
 495 }
 496
 497 static int
 498 slapi_over_cleanup( Operation *op, SlapReply *rs )
 499 {
 500         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 501         int                     rc = SLAP_CB_CONTINUE;
 502
 503         slapi_over_unmerge_controls( op, rs );
 504
 505         if ( pb->internal_op == 0 ) {
 506                 switch ( rs->sr_type ) {
 507                 case REP_RESULT:
 508                         rc = slapi_over_result( op, rs, SLAPI_PLUGIN_POST_RESULT_FN );
 509                         break;
 510                 case REP_SEARCH:
 511                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_ENTRY_FN );
 512                         break;
 513                 case REP_SEARCHREF:
 514                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_REFERRAL_FN );
 515                         break;
 516                 default:
 517                         break;
 518                 }
 519         }
 520
 521         return rc;
 522 }
 523
 524 static int
 525 slapi_op_func( Operation *op, SlapReply *rs )
 526 {
 527         Slapi_PBlock            *pb;
 528         slap_operation_t        which;
 529         struct slapi_op_info    *opinfo;
 530         int                     rc;
 531         slap_overinfo           *oi;
 532         slap_overinst           *on;
 533         slap_callback           cb;
 534         int                     internal_op;
 535         int                     preop_type, postop_type;
 536
 537         if ( !slapi_plugins_used )
 538                 return SLAP_CB_CONTINUE;
 539
 540         /*
 541          * Find the SLAPI operation information for this LDAP
 542          * operation; this will contain the preop and postop
 543          * plugin types, as well as optional callbacks for
 544          * setting up the SLAPI environment.
 545          */
 546         which = slapi_tag2op( op->o_tag );
 547         if ( which >= op_last ) {
 548                 /* invalid operation, but let someone else deal with it */
 549                 return SLAP_CB_CONTINUE;
 550         }
 551
 552         opinfo = &slapi_op_dispatch_table[which];
 553         if ( opinfo == NULL ) {
 554                 /* no SLAPI plugin types for this operation */
 555                 return SLAP_CB_CONTINUE;
 556         }
 557
 558         internal_op = slapi_op_internal_p( op, &cb );
 559
 560         if ( internal_op ) {
 561                 preop_type = opinfo->soi_internal_preop;
 562                 postop_type = opinfo->soi_internal_postop;
 563         } else {
 564                 preop_type = opinfo->soi_preop;
 565                 postop_type = opinfo->soi_postop;
 566         }
 567
 568         if ( preop_type == 0 ) {
 569                 /* no SLAPI plugin types for this operation */
 570                 rc = SLAP_CB_CONTINUE;
 571                 goto cleanup;
 572         }
 573
 574         pb = SLAPI_OPERATION_PBLOCK( op );
 575
 576         rc = slapi_int_call_plugins( op->o_bd, preop_type, pb );
 577
 578         /*
 579          * soi_callback is responsible for examining the result code
 580          * of the preoperation plugin and determining whether to
 581          * abort. This is needed because of special SLAPI behaviour
 582          e with bind preoperation plugins.
 583          *
 584          * The soi_callback function is also used to reset any values
 585          * returned from the preoperation plugin before calling the
 586          * backend (for the success case).
 587          */
 588         if ( opinfo->soi_callback == NULL ) {
 589                 /* default behaviour is preop plugin can abort operation */
 590                 if ( rc < 0 ) {
 591                         rc = rs->sr_err;
 592                         goto cleanup;
 593                 }
 594         } else {
 595                 rc = (opinfo->soi_callback)( op, rs, rc );
 596                 if ( rc )
 597                         goto cleanup;
 598         }
 599
 600         /*
 601          * Call actual backend (or next overlay in stack). We need to
 602          * do this rather than returning SLAP_CB_CONTINUE and calling
 603          * postoperation plugins in a response handler to match the
 604          * behaviour of SLAPI in OpenLDAP 2.2, where postoperation
 605          * plugins are called after the backend has completely
 606          * finished processing the operation.
 607          */
 608         on = (slap_overinst *)op->o_bd->bd_info;
 609         oi = on->on_info;
 610
 611         rc = overlay_op_walk( op, rs, which, oi, on->on_next );
 612
 613         /*
 614          * Call postoperation plugins
 615          */
 616         slapi_int_call_plugins( op->o_bd, postop_type, pb );
 617
 618 cleanup:
 619         if ( !internal_op ) {
 620                 slapi_pblock_destroy(pb);
 621                 cb.sc_private = NULL;
 622         }
 623
 624         op->o_callback = cb.sc_next;
 625
 626         return rc;
 627 }
 628
 629 static int
 630 slapi_over_extended( Operation *op, SlapReply *rs )
 631 {
 632         Slapi_PBlock    *pb;
 633         SLAPI_FUNC      callback;
 634         int             rc;
 635         int             internal_op;
 636         slap_callback   cb;
 637
 638         slapi_int_get_extop_plugin( &op->ore_reqoid, &callback );
 639         if ( callback == NULL ) {
 640                 return SLAP_CB_CONTINUE;
 641         }
 642
 643         internal_op = slapi_op_internal_p( op, &cb );
 644         if ( internal_op ) {
 645                 return SLAP_CB_CONTINUE;
 646         }
 647
 648         pb = SLAPI_OPERATION_PBLOCK( op );
 649
 650         rc = (*callback)( pb );
 651         if ( rc == SLAPI_PLUGIN_EXTENDED_SENT_RESULT ) {
 652                 slapi_pblock_destroy( pb );
 653                 return rc;
 654         } else if ( rc == SLAPI_PLUGIN_EXTENDED_NOT_HANDLED ) {
 655                 slapi_pblock_destroy( pb );
 656                 return SLAP_CB_CONTINUE;
 657         }
 658
 659         assert( rs->sr_rspoid != NULL );
 660
 661         send_ldap_extended( op, rs );
 662
 663 #if 0
 664         slapi_ch_free_string( (char **)&rs->sr_rspoid );
 665 #endif
 666
 667         if ( rs->sr_rspdata != NULL )
 668                 ber_bvfree( rs->sr_rspdata );
 669
 670         slapi_pblock_destroy( pb );
 671
 672         return rs->sr_err;
 673 }
 674
 675 static int
 676 slapi_over_access_allowed(
 677         Operation               *op,
 678         Entry                   *e,
 679         AttributeDescription    *desc,
 680         struct berval           *val,
 681         slap_access_t           access,
 682         AccessControlState      *state,
 683         slap_mask_t             *maskp )
 684 {
 685         int                     rc;
 686         Slapi_PBlock            *pb;
 687         slap_callback           cb;
 688         int                     internal_op;
 689
 690         internal_op = slapi_op_internal_p( op, &cb );
 691
 692         cb.sc_response = NULL;
 693         cb.sc_cleanup = NULL;
 694
 695         pb = SLAPI_OPERATION_PBLOCK( op );
 696
 697         rc = slapi_int_access_allowed( op, e, desc, val, access, state );
 698         if ( rc ) {
 699                 rc = SLAP_CB_CONTINUE;
 700         }
 701
 702         op->o_callback = cb.sc_next;
 703
 704         if ( !internal_op )
 705                 slapi_pblock_destroy( pb );
 706
 707         return rc;
 708 }
 709
 710 static int
 711 slapi_over_acl_group(
 712         Operation               *op,
 713         Entry                   *target,
 714         struct berval           *gr_ndn,
 715         struct berval           *op_ndn,
 716         ObjectClass             *group_oc,
 717         AttributeDescription    *group_at )
 718 {
 719         Slapi_Entry             *e;
 720         int                     rc;
 721         Slapi_PBlock            *pb;
 722         BackendDB               *be = op->o_bd;
 723         GroupAssertion          *g;
 724
 725         op->o_bd = select_backend( gr_ndn, 0, 0 );
 726
 727         for ( g = op->o_groups; g; g = g->ga_next ) {
 728                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
 729                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
 730                 {
 731                         continue;
 732                 }
 733                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
 734                         break;
 735                 }
 736         }
 737         if ( g != NULL ) {
 738                 rc = g->ga_res;
 739                 goto done;
 740         }
 741
 742         if ( target != NULL && dn_match( &target->e_nname, gr_ndn ) ) {
 743                 e = target;
 744                 rc = 0;
 745         } else {
 746                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
 747         }
 748         if ( e != NULL ) {
 749                 int                     internal_op;
 750                 slap_callback           cb;
 751
 752                 internal_op = slapi_op_internal_p( op, &cb );
 753
 754                 cb.sc_response = NULL;
 755                 cb.sc_cleanup = NULL;
 756
 757                 pb = SLAPI_OPERATION_PBLOCK( op );
 758
 759                 slapi_pblock_set( pb, SLAPI_X_GROUP_ENTRY,        (void *)e );
 760                 slapi_pblock_set( pb, SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
 761                 slapi_pblock_set( pb, SLAPI_X_GROUP_ATTRIBUTE,    (void *)group_at->ad_cname.bv_val );
 762                 slapi_pblock_set( pb, SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
 763
 764                 rc = slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_PRE_GROUP_FN, pb );
 765                 if ( rc >= 0 ) /* 1 means no plugins called */
 766                         rc = SLAP_CB_CONTINUE;
 767                 else
 768                         rc = pb->rs.sr_err;
 769
 770                 if ( !internal_op )
 771                         slapi_pblock_destroy( pb );
 772
 773                 if ( e != target ) {
 774                         be_entry_release_r( op, e );
 775                 }
 776         } else {
 777                 rc = LDAP_NO_SUCH_OBJECT; /* return SLAP_CB_CONTINUE for correctness? */
 778         }
 779
 780         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache &&
 781              rc != SLAP_CB_CONTINUE ) {
 782                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
 783                         op->o_tmpmemctx );
 784                 g->ga_be = op->o_bd;
 785                 g->ga_oc = group_oc;
 786                 g->ga_at = group_at;
 787                 g->ga_res = rc;
 788                 g->ga_len = gr_ndn->bv_len;
 789                 strcpy( g->ga_ndn, gr_ndn->bv_val );
 790                 g->ga_next = op->o_groups;
 791                 op->o_groups = g;
 792         }
 793         /*
 794          * XXX don't call POST_GROUP_FN, I have no idea what the point of
 795          * that plugin function was anyway
 796          */
 797 done:
 798         op->o_bd = be;
 799         return rc;
 800 }
 801
 802 int
 803 slapi_int_overlay_init()
 804 {
 805         memset( &slapi, 0, sizeof(slapi) );
 806
 807         slapi.on_bi.bi_type = SLAPI_OVERLAY_NAME;
 808
 809         slapi.on_bi.bi_op_bind          = slapi_op_func;
 810         slapi.on_bi.bi_op_unbind        = slapi_op_func;
 811         slapi.on_bi.bi_op_search        = slapi_op_func;
 812         slapi.on_bi.bi_op_compare       = slapi_op_func;
 813         slapi.on_bi.bi_op_modify        = slapi_op_func;
 814         slapi.on_bi.bi_op_modrdn        = slapi_op_func;
 815         slapi.on_bi.bi_op_add           = slapi_op_func;
 816         slapi.on_bi.bi_op_delete        = slapi_op_func;
 817         slapi.on_bi.bi_op_abandon       = slapi_op_func;
 818         slapi.on_bi.bi_op_cancel        = slapi_op_func;
 819
 820         slapi.on_bi.bi_extended         = slapi_over_extended;
 821         slapi.on_bi.bi_access_allowed   = slapi_over_access_allowed;
 822         slapi.on_bi.bi_operational      = slapi_over_aux_operational;
 823         slapi.on_bi.bi_acl_group        = slapi_over_acl_group;
 824
 825         return overlay_register( &slapi );
 826 }
 827
 828 #endif /* LDAP_SLAPI */