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 2001-2007 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 static int slapi_over_initialized = 0;
  35
  36 static int slapi_over_response( Operation *op, SlapReply *rs );
  37 static int slapi_over_cleanup( Operation *op, SlapReply *rs );
  38
  39 static Slapi_PBlock *
  40 slapi_over_pblock_new( Operation *op, SlapReply *rs )
  41 {
  42         Slapi_PBlock            *pb;
  43
  44         pb = slapi_pblock_new();
  45         pb->pb_op = op;
  46         pb->pb_conn = op->o_conn;
  47         pb->pb_rs = rs;
  48         pb->pb_intop = 0;
  49
  50         PBLOCK_ASSERT_OP( pb, op->o_tag );
  51
  52         return pb;
  53 }
  54
  55 static int
  56 slapi_op_internal_p( Operation *op, SlapReply *rs, slap_callback *cb )
  57 {
  58         int                     internal_op = 0;
  59         Slapi_PBlock            *pb = NULL;
  60         slap_callback           *pcb;
  61
  62         /*
  63          * Abstraction violating check for SLAPI internal operations
  64          * allows pblock to remain consistent when invoking internal
  65          * op plugins
  66          */
  67         for ( pcb = op->o_callback; pcb != NULL; pcb = pcb->sc_next ) {
  68                 if ( pcb->sc_response == slapi_int_response ) {
  69                         pb = (Slapi_PBlock *)pcb->sc_private;
  70                         PBLOCK_ASSERT_INTOP( pb, 0 );
  71                         internal_op = 1;
  72                         break;
  73                 }
  74         }
  75
  76         if ( cb != NULL ) {
  77                 if ( pb == NULL ) {
  78                         pb = slapi_over_pblock_new( op, rs );
  79                 }
  80
  81                 cb->sc_response = slapi_over_response;
  82                 cb->sc_cleanup = slapi_over_cleanup;
  83                 cb->sc_private = pb;
  84                 cb->sc_next = op->o_callback;
  85                 op->o_callback = cb;
  86         }
  87
  88         return internal_op;
  89 }
  90
  91 static int
  92 slapi_over_compute_output(
  93         computed_attr_context *c,
  94         Slapi_Attr *attribute,
  95         Slapi_Entry *entry
  96 )
  97 {
  98         Attribute               **a;
  99         AttributeDescription    *desc;
 100         SlapReply               *rs;
 101
 102         if ( c == NULL || attribute == NULL || entry == NULL ) {
 103                 return 0;
 104         }
 105
 106         rs = (SlapReply *)c->cac_private;
 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, rs, NULL ) ) {
 149                 return SLAP_CB_CONTINUE;
 150         }
 151
 152         ctx.cac_pb = slapi_over_pblock_new( op, rs );
 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 /*
 183  * We need this function to call frontendDB (global) plugins before
 184  * database plugins, if we are invoked by a slap_callback.
 185  */
 186 static int
 187 slapi_over_call_plugins( Slapi_PBlock *pb, int type )
 188 {
 189         int                     rc = 1; /* means no plugins called */
 190         Operation               *op;
 191
 192         PBLOCK_ASSERT_OP( pb, 0 );
 193         op = pb->pb_op;
 194
 195         if ( !be_match( op->o_bd, frontendDB ) ) {
 196                 rc = slapi_int_call_plugins( frontendDB, type, pb );
 197         }
 198         if ( rc >= 0 ) {
 199                 rc = slapi_int_call_plugins( op->o_bd, type, pb );
 200         }
 201
 202         return rc;
 203 }
 204
 205 static int
 206 slapi_over_search( Operation *op, SlapReply *rs, int type )
 207 {
 208         int                     rc;
 209         Slapi_PBlock            *pb;
 210
 211         assert( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF );
 212
 213         /* create a new pblock to not trample on result controls */
 214         pb = slapi_over_pblock_new( op, rs );
 215
 216         rc = slapi_over_call_plugins( pb, type );
 217         if ( rc >= 0 ) /* 1 means no plugins called */
 218                 rc = SLAP_CB_CONTINUE;
 219         else
 220                 rc = LDAP_SUCCESS; /* confusing: don't abort, but don't send */
 221
 222         slapi_pblock_destroy(pb);
 223
 224         return rc;
 225 }
 226
 227 /*
 228  * Call pre- and post-result plugins
 229  */
 230 static int
 231 slapi_over_result( Operation *op, SlapReply *rs, int type )
 232 {
 233         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 234
 235         assert( rs->sr_type == REP_RESULT || rs->sr_type == REP_SASL || rs->sr_type == REP_EXTENDED );
 236
 237         slapi_over_call_plugins( pb, type );
 238
 239         return SLAP_CB_CONTINUE;
 240 }
 241
 242
 243 static int
 244 slapi_op_bind_callback( Operation *op, SlapReply *rs, int prc )
 245 {
 246         switch ( prc ) {
 247         case SLAPI_BIND_SUCCESS:
 248                 /* Continue with backend processing */
 249                 break;
 250         case SLAPI_BIND_FAIL:
 251                 /* Failure, frontend (that's us) sends result */
 252                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 253                 send_ldap_result( op, rs );
 254                 return rs->sr_err;
 255                 break;
 256         case SLAPI_BIND_ANONYMOUS: /* undocumented */
 257         default: /* plugin sent result or no plugins called */
 258                 BER_BVZERO( &op->orb_edn );
 259
 260                 if ( rs->sr_err == LDAP_SUCCESS ) {
 261                         /*
 262                          * Plugin will have called slapi_pblock_set(LDAP_CONN_DN) which
 263                          * will have set conn->c_dn and conn->c_ndn
 264                          */
 265                         if ( BER_BVISNULL( &op->o_conn->c_ndn ) && prc == 1 ) {
 266                                 /* No plugins were called; continue processing */
 267                                 return LDAP_SUCCESS;
 268                         }
 269                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 270                         if ( !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
 271                                 ber_len_t max = sockbuf_max_incoming_auth;
 272                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
 273                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
 274                         }
 275                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 276
 277                         /* log authorization identity */
 278                         Statslog( LDAP_DEBUG_STATS,
 279                                 "%s BIND dn=\"%s\" mech=%s (SLAPI) ssf=0\n",
 280                                 op->o_log_prefix,
 281                                 BER_BVISNULL( &op->o_conn->c_dn )
 282                                         ? "<empty>" : op->o_conn->c_dn.bv_val,
 283                                 BER_BVISNULL( &op->orb_mech )
 284                                         ? "<empty>" : op->orb_mech.bv_val, 0, 0 );
 285
 286                         return -1;
 287                 }
 288                 break;
 289         }
 290
 291         return rs->sr_err;
 292 }
 293
 294 static int
 295 slapi_op_search_callback( Operation *op, SlapReply *rs, int prc )
 296 {
 297         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 298
 299         /* check preoperation result code */
 300         if ( prc < 0 ) {
 301                 return rs->sr_err;
 302         }
 303
 304         rs->sr_err = LDAP_SUCCESS;
 305
 306         if ( pb->pb_intop == 0 &&
 307              slapi_int_call_plugins( op->o_bd, SLAPI_PLUGIN_COMPUTE_SEARCH_REWRITER_FN, pb ) == 0 ) {
 308                 /*
 309                  * The plugin can set the SLAPI_SEARCH_FILTER.
 310                  * SLAPI_SEARCH_STRFILER is not normative.
 311                  */
 312                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 313                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
 314         }
 315
 316         return LDAP_SUCCESS;
 317 }
 318
 319 struct slapi_op_info {
 320         int soi_preop;                  /* preoperation plugin parameter */
 321         int soi_postop;                 /* postoperation plugin parameter */
 322         int soi_internal_preop;         /* internal preoperation plugin parameter */
 323         int soi_internal_postop;        /* internal postoperation plugin parameter */
 324         int (*soi_callback)(Operation *, SlapReply *, int); /* preoperation result handler */
 325 } slapi_op_dispatch_table[] = {
 326         {
 327                 SLAPI_PLUGIN_PRE_BIND_FN,
 328                 SLAPI_PLUGIN_POST_BIND_FN,
 329                 SLAPI_PLUGIN_INTERNAL_PRE_BIND_FN,
 330                 SLAPI_PLUGIN_INTERNAL_POST_BIND_FN,
 331                 slapi_op_bind_callback
 332         },
 333         {
 334                 SLAPI_PLUGIN_PRE_UNBIND_FN,
 335                 SLAPI_PLUGIN_POST_UNBIND_FN,
 336                 SLAPI_PLUGIN_INTERNAL_PRE_UNBIND_FN,
 337                 SLAPI_PLUGIN_INTERNAL_POST_UNBIND_FN,
 338                 NULL
 339         },
 340         {
 341                 SLAPI_PLUGIN_PRE_SEARCH_FN,
 342                 SLAPI_PLUGIN_POST_SEARCH_FN,
 343                 SLAPI_PLUGIN_INTERNAL_PRE_SEARCH_FN,
 344                 SLAPI_PLUGIN_INTERNAL_POST_SEARCH_FN,
 345                 slapi_op_search_callback
 346         },
 347         {
 348                 SLAPI_PLUGIN_PRE_COMPARE_FN,
 349                 SLAPI_PLUGIN_POST_COMPARE_FN,
 350                 SLAPI_PLUGIN_INTERNAL_PRE_COMPARE_FN,
 351                 SLAPI_PLUGIN_INTERNAL_POST_COMPARE_FN,
 352                 NULL
 353         },
 354         {
 355                 SLAPI_PLUGIN_PRE_MODIFY_FN,
 356                 SLAPI_PLUGIN_POST_MODIFY_FN,
 357                 SLAPI_PLUGIN_INTERNAL_PRE_MODIFY_FN,
 358                 SLAPI_PLUGIN_INTERNAL_POST_MODIFY_FN,
 359                 NULL
 360         },
 361         {
 362                 SLAPI_PLUGIN_PRE_MODRDN_FN,
 363                 SLAPI_PLUGIN_POST_MODRDN_FN,
 364                 SLAPI_PLUGIN_INTERNAL_PRE_MODRDN_FN,
 365                 SLAPI_PLUGIN_INTERNAL_POST_MODRDN_FN,
 366                 NULL
 367         },
 368         {
 369                 SLAPI_PLUGIN_PRE_ADD_FN,
 370                 SLAPI_PLUGIN_POST_ADD_FN,
 371                 SLAPI_PLUGIN_INTERNAL_PRE_ADD_FN,
 372                 SLAPI_PLUGIN_INTERNAL_POST_ADD_FN,
 373                 NULL
 374         },
 375         {
 376                 SLAPI_PLUGIN_PRE_DELETE_FN,
 377                 SLAPI_PLUGIN_POST_DELETE_FN,
 378                 SLAPI_PLUGIN_INTERNAL_PRE_DELETE_FN,
 379                 SLAPI_PLUGIN_INTERNAL_POST_DELETE_FN,
 380                 NULL
 381         },
 382         {
 383                 SLAPI_PLUGIN_PRE_ABANDON_FN,
 384                 SLAPI_PLUGIN_POST_ABANDON_FN,
 385                 SLAPI_PLUGIN_INTERNAL_PRE_ABANDON_FN,
 386                 SLAPI_PLUGIN_INTERNAL_POST_ABANDON_FN,
 387                 NULL
 388         },
 389         {
 390                 0,
 391                 0,
 392                 0,
 393                 0,
 394                 NULL
 395         }
 396 };
 397
 398 slap_operation_t
 399 slapi_tag2op( ber_tag_t tag )
 400 {
 401         slap_operation_t op;
 402
 403         switch ( tag ) {
 404         case LDAP_REQ_BIND:
 405                 op = op_bind;
 406                 break;
 407         case LDAP_REQ_ADD:
 408                 op = op_add;
 409                 break;
 410         case LDAP_REQ_DELETE:
 411                 op = op_delete;
 412                 break;
 413         case LDAP_REQ_MODRDN:
 414                 op = op_modrdn;
 415                 break;
 416         case LDAP_REQ_MODIFY:
 417                 op = op_modify;
 418                 break;
 419         case LDAP_REQ_COMPARE:
 420                 op = op_compare;
 421                 break;
 422         case LDAP_REQ_SEARCH:
 423                 op = op_search;
 424                 break;
 425         case LDAP_REQ_UNBIND:
 426                 op = op_unbind;
 427                 break;
 428         default:
 429                 op = op_last;
 430                 break;
 431         }
 432
 433         return op;
 434 }
 435
 436 /* Add SLAPI_RESCONTROLS to rs->sr_ctrls, with care, because
 437  * rs->sr_ctrls could be allocated on the stack */
 438 static int
 439 slapi_over_merge_controls( Operation *op, SlapReply *rs )
 440 {
 441         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 442         LDAPControl             **ctrls = NULL;
 443         LDAPControl             **slapi_ctrls = NULL;
 444         size_t                  n_slapi_ctrls = 0;
 445         size_t                  n_rs_ctrls = 0;
 446         size_t                  i;
 447
 448         slapi_pblock_get( pb, SLAPI_RESCONTROLS, (void **)&slapi_ctrls );
 449
 450         n_slapi_ctrls = slapi_int_count_controls( slapi_ctrls );
 451         n_rs_ctrls = slapi_int_count_controls( rs->sr_ctrls );
 452
 453         slapi_pblock_set( pb, SLAPI_X_OLD_RESCONTROLS, (void *)rs->sr_ctrls );
 454
 455         if ( n_slapi_ctrls == 0 )
 456                 return LDAP_SUCCESS; /* no SLAPI controls */
 457
 458         ctrls = (LDAPControl **) op->o_tmpalloc(
 459                 ( n_slapi_ctrls + n_rs_ctrls + 1 ) * sizeof(LDAPControl *),
 460                 op->o_tmpmemctx );
 461
 462         for ( i = 0; i < n_slapi_ctrls; i++ ) {
 463                 ctrls[i] = slapi_ctrls[i];
 464         }
 465         if ( rs->sr_ctrls != NULL ) {
 466                 for ( i = 0; i < n_rs_ctrls; i++ ) {
 467                         ctrls[n_slapi_ctrls + i] = rs->sr_ctrls[i];
 468                 }
 469         }
 470         ctrls[n_slapi_ctrls + n_rs_ctrls] = NULL;
 471
 472         rs->sr_ctrls = ctrls;
 473
 474         return LDAP_SUCCESS;
 475 }
 476
 477 static int
 478 slapi_over_unmerge_controls( Operation *op, SlapReply *rs )
 479 {
 480         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 481         LDAPControl             **rs_ctrls = NULL;
 482
 483         slapi_pblock_get( pb, SLAPI_X_OLD_RESCONTROLS, (void **)&rs_ctrls );
 484
 485         if ( rs_ctrls == NULL || rs->sr_ctrls == rs_ctrls ) {
 486                 /* no copying done */
 487                 return LDAP_SUCCESS;
 488         }
 489
 490         op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 491         rs->sr_ctrls = rs_ctrls;
 492
 493         return LDAP_SUCCESS;
 494 }
 495
 496 static int
 497 slapi_over_response( Operation *op, SlapReply *rs )
 498 {
 499         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 500         int                     rc = SLAP_CB_CONTINUE;
 501
 502         if ( pb->pb_intop == 0 ) {
 503                 switch ( rs->sr_type ) {
 504                 case REP_RESULT:
 505                 case REP_SASL:
 506                 case REP_EXTENDED:
 507                         rc = slapi_over_result( op, rs, SLAPI_PLUGIN_PRE_RESULT_FN );
 508                         break;
 509                 case REP_SEARCH:
 510                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_ENTRY_FN );
 511                         break;
 512                 case REP_SEARCHREF:
 513                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_REFERRAL_FN );
 514                         break;
 515                 default:
 516                         break;
 517                 }
 518         }
 519
 520         slapi_over_merge_controls( op, rs );
 521
 522         return rc;
 523 }
 524
 525 static int
 526 slapi_over_cleanup( Operation *op, SlapReply *rs )
 527 {
 528         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 529         int                     rc = SLAP_CB_CONTINUE;
 530
 531         slapi_over_unmerge_controls( op, rs );
 532
 533         if ( pb->pb_intop == 0 ) {
 534                 switch ( rs->sr_type ) {
 535                 case REP_RESULT:
 536                 case REP_SASL:
 537                 case REP_EXTENDED:
 538                         rc = slapi_over_result( op, rs, SLAPI_PLUGIN_POST_RESULT_FN );
 539                         break;
 540                 case REP_SEARCH:
 541                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_ENTRY_FN );
 542                         break;
 543                 case REP_SEARCHREF:
 544                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_REFERRAL_FN );
 545                         break;
 546                 default:
 547                         break;
 548                 }
 549         }
 550
 551         return rc;
 552 }
 553
 554 static int
 555 slapi_op_func( Operation *op, SlapReply *rs )
 556 {
 557         Slapi_PBlock            *pb;
 558         slap_operation_t        which;
 559         struct slapi_op_info    *opinfo;
 560         int                     rc;
 561         slap_overinfo           *oi;
 562         slap_overinst           *on;
 563         slap_callback           cb;
 564         int                     internal_op;
 565         int                     preop_type, postop_type;
 566         BackendDB               *be;
 567
 568         if ( !slapi_plugins_used )
 569                 return SLAP_CB_CONTINUE;
 570
 571         /*
 572          * Find the SLAPI operation information for this LDAP
 573          * operation; this will contain the preop and postop
 574          * plugin types, as well as optional callbacks for
 575          * setting up the SLAPI environment.
 576          */
 577         which = slapi_tag2op( op->o_tag );
 578         if ( which >= op_last ) {
 579                 /* invalid operation, but let someone else deal with it */
 580                 return SLAP_CB_CONTINUE;
 581         }
 582
 583         opinfo = &slapi_op_dispatch_table[which];
 584         if ( opinfo == NULL ) {
 585                 /* no SLAPI plugin types for this operation */
 586                 return SLAP_CB_CONTINUE;
 587         }
 588
 589         internal_op = slapi_op_internal_p( op, rs, &cb );
 590
 591         if ( internal_op ) {
 592                 preop_type = opinfo->soi_internal_preop;
 593                 postop_type = opinfo->soi_internal_postop;
 594         } else {
 595                 preop_type = opinfo->soi_preop;
 596                 postop_type = opinfo->soi_postop;
 597         }
 598
 599         if ( preop_type == 0 ) {
 600                 /* no SLAPI plugin types for this operation */
 601                 pb = NULL;
 602                 rc = SLAP_CB_CONTINUE;
 603                 goto cleanup;
 604         }
 605
 606         pb = SLAPI_OPERATION_PBLOCK( op );
 607
 608         /* cache backend so we call correct postop plugins */
 609         be = pb->pb_op->o_bd;
 610
 611         rc = slapi_int_call_plugins( be, preop_type, pb );
 612
 613         /*
 614          * soi_callback is responsible for examining the result code
 615          * of the preoperation plugin and determining whether to
 616          * abort. This is needed because of special SLAPI behaviour
 617          e with bind preoperation plugins.
 618          *
 619          * The soi_callback function is also used to reset any values
 620          * returned from the preoperation plugin before calling the
 621          * backend (for the success case).
 622          */
 623         if ( opinfo->soi_callback == NULL ) {
 624                 /* default behaviour is preop plugin can abort operation */
 625                 if ( rc < 0 ) {
 626                         rc = rs->sr_err;
 627                         goto cleanup;
 628                 }
 629         } else {
 630                 rc = (opinfo->soi_callback)( op, rs, rc );
 631                 if ( rc )
 632                         goto cleanup;
 633         }
 634
 635         /*
 636          * Call actual backend (or next overlay in stack). We need to
 637          * do this rather than returning SLAP_CB_CONTINUE and calling
 638          * postoperation plugins in a response handler to match the
 639          * behaviour of SLAPI in OpenLDAP 2.2, where postoperation
 640          * plugins are called after the backend has completely
 641          * finished processing the operation.
 642          */
 643         on = (slap_overinst *)op->o_bd->bd_info;
 644         oi = on->on_info;
 645
 646         rc = overlay_op_walk( op, rs, which, oi, on->on_next );
 647
 648         /*
 649          * Call postoperation plugins
 650          */
 651         slapi_int_call_plugins( be, postop_type, pb );
 652
 653 cleanup:
 654         if ( !internal_op ) {
 655                 slapi_pblock_destroy(pb);
 656                 cb.sc_private = NULL;
 657         }
 658
 659         op->o_callback = cb.sc_next;
 660
 661         return rc;
 662 }
 663
 664 static int
 665 slapi_over_extended( Operation *op, SlapReply *rs )
 666 {
 667         Slapi_PBlock    *pb;
 668         SLAPI_FUNC      callback;
 669         int             rc;
 670         int             internal_op;
 671         slap_callback   cb;
 672
 673         slapi_int_get_extop_plugin( &op->ore_reqoid, &callback );
 674         if ( callback == NULL ) {
 675                 return SLAP_CB_CONTINUE;
 676         }
 677
 678         internal_op = slapi_op_internal_p( op, rs, &cb );
 679         if ( internal_op ) {
 680                 return SLAP_CB_CONTINUE;
 681         }
 682
 683         pb = SLAPI_OPERATION_PBLOCK( op );
 684
 685         rc = (*callback)( pb );
 686         if ( rc == SLAPI_PLUGIN_EXTENDED_SENT_RESULT ) {
 687                 goto cleanup;
 688         } else if ( rc == SLAPI_PLUGIN_EXTENDED_NOT_HANDLED ) {
 689                 rc = SLAP_CB_CONTINUE;
 690                 goto cleanup;
 691         }
 692
 693         assert( rs->sr_rspoid != NULL );
 694
 695         send_ldap_extended( op, rs );
 696
 697 #if 0
 698         slapi_ch_free_string( (char **)&rs->sr_rspoid );
 699 #endif
 700
 701         if ( rs->sr_rspdata != NULL )
 702                 ber_bvfree( rs->sr_rspdata );
 703
 704         rc = rs->sr_err;
 705
 706 cleanup:
 707         slapi_pblock_destroy( pb );
 708         op->o_callback = cb.sc_next;
 709
 710         return rc;
 711 }
 712
 713 static int
 714 slapi_over_access_allowed(
 715         Operation               *op,
 716         Entry                   *e,
 717         AttributeDescription    *desc,
 718         struct berval           *val,
 719         slap_access_t           access,
 720         AccessControlState      *state,
 721         slap_mask_t             *maskp )
 722 {
 723         int                     rc;
 724         Slapi_PBlock            *pb;
 725         slap_callback           cb;
 726         int                     internal_op;
 727         SlapReply               rs = { REP_RESULT };
 728
 729         internal_op = slapi_op_internal_p( op, &rs, &cb );
 730
 731         cb.sc_response = NULL;
 732         cb.sc_cleanup = NULL;
 733
 734         pb = SLAPI_OPERATION_PBLOCK( op );
 735
 736         rc = slapi_int_access_allowed( op, e, desc, val, access, state );
 737         if ( rc ) {
 738                 rc = SLAP_CB_CONTINUE;
 739         }
 740
 741         if ( !internal_op ) {
 742                 slapi_pblock_destroy( pb );
 743         }
 744
 745         op->o_callback = cb.sc_next;
 746
 747         return rc;
 748 }
 749
 750 static int
 751 slapi_over_acl_group(
 752         Operation               *op,
 753         Entry                   *target,
 754         struct berval           *gr_ndn,
 755         struct berval           *op_ndn,
 756         ObjectClass             *group_oc,
 757         AttributeDescription    *group_at )
 758 {
 759         Slapi_Entry             *e;
 760         int                     rc;
 761         Slapi_PBlock            *pb;
 762         BackendDB               *be = op->o_bd;
 763         GroupAssertion          *g;
 764         SlapReply               rs = { REP_RESULT };
 765
 766         op->o_bd = select_backend( gr_ndn, 0 );
 767
 768         for ( g = op->o_groups; g; g = g->ga_next ) {
 769                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
 770                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
 771                 {
 772                         continue;
 773                 }
 774                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
 775                         break;
 776                 }
 777         }
 778         if ( g != NULL ) {
 779                 rc = g->ga_res;
 780                 goto done;
 781         }
 782
 783         if ( target != NULL && dn_match( &target->e_nname, gr_ndn ) ) {
 784                 e = target;
 785                 rc = 0;
 786         } else {
 787                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
 788         }
 789         if ( e != NULL ) {
 790                 int                     internal_op;
 791                 slap_callback           cb;
 792
 793                 internal_op = slapi_op_internal_p( op, &rs, &cb );
 794
 795                 cb.sc_response = NULL;
 796                 cb.sc_cleanup = NULL;
 797
 798                 pb = SLAPI_OPERATION_PBLOCK( op );
 799
 800                 slapi_pblock_set( pb, SLAPI_X_GROUP_ENTRY,        (void *)e );
 801                 slapi_pblock_set( pb, SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
 802                 slapi_pblock_set( pb, SLAPI_X_GROUP_ATTRIBUTE,    (void *)group_at->ad_cname.bv_val );
 803                 slapi_pblock_set( pb, SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
 804
 805                 rc = slapi_over_call_plugins( pb, SLAPI_X_PLUGIN_PRE_GROUP_FN );
 806                 if ( rc >= 0 ) /* 1 means no plugins called */
 807                         rc = SLAP_CB_CONTINUE;
 808                 else
 809                         rc = pb->pb_rs->sr_err;
 810
 811                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_ENTRY );
 812                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_OPERATION_DN );
 813                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_ATTRIBUTE );
 814                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_TARGET_ENTRY );
 815
 816                 if ( !internal_op )
 817                         slapi_pblock_destroy( pb );
 818
 819                 if ( e != target ) {
 820                         be_entry_release_r( op, e );
 821                 }
 822
 823                 op->o_callback = cb.sc_next;
 824         } else {
 825                 rc = LDAP_NO_SUCH_OBJECT; /* return SLAP_CB_CONTINUE for correctness? */
 826         }
 827
 828         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache &&
 829              rc != SLAP_CB_CONTINUE ) {
 830                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
 831                         op->o_tmpmemctx );
 832                 g->ga_be = op->o_bd;
 833                 g->ga_oc = group_oc;
 834                 g->ga_at = group_at;
 835                 g->ga_res = rc;
 836                 g->ga_len = gr_ndn->bv_len;
 837                 strcpy( g->ga_ndn, gr_ndn->bv_val );
 838                 g->ga_next = op->o_groups;
 839                 op->o_groups = g;
 840         }
 841         /*
 842          * XXX don't call POST_GROUP_FN, I have no idea what the point of
 843          * that plugin function was anyway
 844          */
 845 done:
 846         op->o_bd = be;
 847         return rc;
 848 }
 849
 850 static int
 851 slapi_over_db_open( BackendDB *be )
 852 {
 853         Slapi_PBlock            *pb;
 854         int                     rc;
 855
 856         pb = slapi_pblock_new();
 857
 858         rc = slapi_int_call_plugins( be, SLAPI_PLUGIN_START_FN, pb );
 859
 860         slapi_pblock_destroy( pb );
 861
 862         return rc;
 863 }
 864
 865 static int
 866 slapi_over_db_close( BackendDB *be )
 867 {
 868         Slapi_PBlock            *pb;
 869         int                     rc;
 870
 871         pb = slapi_pblock_new();
 872
 873         rc = slapi_int_call_plugins( be, SLAPI_PLUGIN_CLOSE_FN, pb );
 874
 875         slapi_pblock_destroy( pb );
 876
 877         return rc;
 878 }
 879
 880 static int
 881 slapi_over_init()
 882 {
 883         memset( &slapi, 0, sizeof(slapi) );
 884
 885         slapi.on_bi.bi_type = SLAPI_OVERLAY_NAME;
 886
 887         slapi.on_bi.bi_op_bind          = slapi_op_func;
 888         slapi.on_bi.bi_op_unbind        = slapi_op_func;
 889         slapi.on_bi.bi_op_search        = slapi_op_func;
 890         slapi.on_bi.bi_op_compare       = slapi_op_func;
 891         slapi.on_bi.bi_op_modify        = slapi_op_func;
 892         slapi.on_bi.bi_op_modrdn        = slapi_op_func;
 893         slapi.on_bi.bi_op_add           = slapi_op_func;
 894         slapi.on_bi.bi_op_delete        = slapi_op_func;
 895         slapi.on_bi.bi_op_abandon       = slapi_op_func;
 896         slapi.on_bi.bi_op_cancel        = slapi_op_func;
 897
 898         slapi.on_bi.bi_db_open          = slapi_over_db_open;
 899         slapi.on_bi.bi_db_close         = slapi_over_db_close;
 900
 901         slapi.on_bi.bi_extended         = slapi_over_extended;
 902         slapi.on_bi.bi_access_allowed   = slapi_over_access_allowed;
 903         slapi.on_bi.bi_operational      = slapi_over_aux_operational;
 904         slapi.on_bi.bi_acl_group        = slapi_over_acl_group;
 905
 906         return overlay_register( &slapi );
 907 }
 908
 909 int slapi_over_is_inst( BackendDB *be )
 910 {
 911         return overlay_is_inst( be, SLAPI_OVERLAY_NAME );
 912 }
 913
 914 int slapi_over_config( BackendDB *be )
 915 {
 916         if ( slapi_over_initialized == 0 ) {
 917                 int rc;
 918
 919                 /* do global initializaiton */
 920                 ldap_pvt_thread_mutex_init( &slapi_hn_mutex );
 921                 ldap_pvt_thread_mutex_init( &slapi_time_mutex );
 922                 ldap_pvt_thread_mutex_init( &slapi_printmessage_mutex );
 923
 924                 if ( slapi_log_file == NULL )
 925                         slapi_log_file = slapi_ch_strdup( LDAP_RUNDIR LDAP_DIRSEP "errors" );
 926
 927                 rc = slapi_int_init_object_extensions();
 928                 if ( rc != 0 )
 929                         return rc;
 930
 931                 rc = slapi_over_init();
 932                 if ( rc != 0 )
 933                         return rc;
 934
 935                 slapi_over_initialized = 1;
 936         }
 937
 938         return overlay_config( be, SLAPI_OVERLAY_NAME, -1, NULL );
 939 }
 940
 941 #endif /* LDAP_SLAPI */