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 2001-2008 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 #include "config.h"
  31
  32 #ifdef LDAP_SLAPI
  33
  34 static slap_overinst slapi;
  35 static int slapi_over_initialized = 0;
  36
  37 static int slapi_over_response( Operation *op, SlapReply *rs );
  38 static int slapi_over_cleanup( Operation *op, SlapReply *rs );
  39
  40 static Slapi_PBlock *
  41 slapi_over_pblock_new( Operation *op, SlapReply *rs )
  42 {
  43         Slapi_PBlock            *pb;
  44
  45         pb = slapi_pblock_new();
  46         pb->pb_op = op;
  47         pb->pb_conn = op->o_conn;
  48         pb->pb_rs = rs;
  49         pb->pb_intop = 0;
  50
  51         PBLOCK_ASSERT_OP( pb, op->o_tag );
  52
  53         return pb;
  54 }
  55
  56 static int
  57 slapi_op_internal_p( Operation *op, SlapReply *rs, slap_callback *cb )
  58 {
  59         int                     internal_op = 0;
  60         Slapi_PBlock            *pb = NULL;
  61         slap_callback           *pcb;
  62
  63         /*
  64          * Abstraction violating check for SLAPI internal operations
  65          * allows pblock to remain consistent when invoking internal
  66          * op plugins
  67          */
  68         for ( pcb = op->o_callback; pcb != NULL; pcb = pcb->sc_next ) {
  69                 if ( pcb->sc_response == slapi_int_response ) {
  70                         pb = (Slapi_PBlock *)pcb->sc_private;
  71                         PBLOCK_ASSERT_INTOP( pb, 0 );
  72                         internal_op = 1;
  73                         break;
  74                 }
  75         }
  76
  77         if ( cb != NULL ) {
  78                 if ( pb == NULL ) {
  79                         pb = slapi_over_pblock_new( op, rs );
  80                 }
  81
  82                 cb->sc_response = slapi_over_response;
  83                 cb->sc_cleanup = slapi_over_cleanup;
  84                 cb->sc_private = pb;
  85                 cb->sc_next = op->o_callback;
  86                 op->o_callback = cb;
  87         }
  88
  89         return internal_op;
  90 }
  91
  92 static int
  93 slapi_over_compute_output(
  94         computed_attr_context *c,
  95         Slapi_Attr *attribute,
  96         Slapi_Entry *entry
  97 )
  98 {
  99         Attribute               **a;
 100         AttributeDescription    *desc;
 101         SlapReply               *rs;
 102
 103         if ( c == NULL || attribute == NULL || entry == NULL ) {
 104                 return 0;
 105         }
 106
 107         rs = (SlapReply *)c->cac_private;
 108
 109         assert( rs->sr_entry == entry );
 110
 111         desc = attribute->a_desc;
 112
 113         if ( rs->sr_attrs == NULL ) {
 114                 /* All attrs request, skip operational attributes */
 115                 if ( is_at_operational( desc->ad_type ) ) {
 116                         return 0;
 117                 }
 118         } else {
 119                 /* Specific attributes requested */
 120                 if ( is_at_operational( desc->ad_type ) ) {
 121                         if ( !SLAP_OPATTRS( rs->sr_attr_flags ) &&
 122                              !ad_inlist( desc, rs->sr_attrs ) ) {
 123                                 return 0;
 124                         }
 125                 } else {
 126                         if ( !SLAP_USERATTRS( rs->sr_attr_flags ) &&
 127                              !ad_inlist( desc, rs->sr_attrs ) ) {
 128                                 return 0;
 129                         }
 130                 }
 131         }
 132
 133         /* XXX perhaps we should check for existing attributes and merge */
 134         for ( a = &rs->sr_operational_attrs; *a != NULL; a = &(*a)->a_next )
 135                 ;
 136
 137         *a = slapi_attr_dup( attribute );
 138
 139         return 0;
 140 }
 141
 142 static int
 143 slapi_over_aux_operational( Operation *op, SlapReply *rs )
 144 {
 145         /* Support for computed attribute plugins */
 146         computed_attr_context    ctx;
 147         AttributeName           *anp;
 148
 149         if ( slapi_op_internal_p( op, rs, NULL ) ) {
 150                 return SLAP_CB_CONTINUE;
 151         }
 152
 153         ctx.cac_pb = slapi_over_pblock_new( op, rs );
 154         ctx.cac_op = op;
 155         ctx.cac_private = rs;
 156
 157         if ( rs->sr_entry != NULL ) {
 158                 /*
 159                  * For each client requested attribute, call the plugins.
 160                  */
 161                 if ( rs->sr_attrs != NULL ) {
 162                         for ( anp = rs->sr_attrs; anp->an_name.bv_val != NULL; anp++ ) {
 163                                 if ( compute_evaluator( &ctx, anp->an_name.bv_val,
 164                                         rs->sr_entry, slapi_over_compute_output ) == 1 ) {
 165                                         break;
 166                                 }
 167                         }
 168                 } else {
 169                         /*
 170                          * Technically we shouldn't be returning operational attributes
 171                          * when the user requested only user attributes. We'll let the
 172                          * plugin decide whether to be naughty or not.
 173                          */
 174                         compute_evaluator( &ctx, "*", rs->sr_entry, slapi_over_compute_output );
 175                 }
 176         }
 177
 178         slapi_pblock_destroy( ctx.cac_pb );
 179
 180         return SLAP_CB_CONTINUE;
 181 }
 182
 183 /*
 184  * We need this function to call frontendDB (global) plugins before
 185  * database plugins, if we are invoked by a slap_callback.
 186  */
 187 static int
 188 slapi_over_call_plugins( Slapi_PBlock *pb, int type )
 189 {
 190         int                     rc = 1; /* means no plugins called */
 191         Operation               *op;
 192
 193         PBLOCK_ASSERT_OP( pb, 0 );
 194         op = pb->pb_op;
 195
 196         if ( !be_match( op->o_bd, frontendDB ) ) {
 197                 rc = slapi_int_call_plugins( frontendDB, type, pb );
 198         }
 199         if ( rc >= 0 ) {
 200                 rc = slapi_int_call_plugins( op->o_bd, type, pb );
 201         }
 202
 203         return rc;
 204 }
 205
 206 static int
 207 slapi_over_search( Operation *op, SlapReply *rs, int type )
 208 {
 209         int                     rc;
 210         Slapi_PBlock            *pb;
 211
 212         assert( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF );
 213
 214         /* create a new pblock to not trample on result controls */
 215         pb = slapi_over_pblock_new( op, rs );
 216
 217         rc = slapi_over_call_plugins( pb, type );
 218         if ( rc >= 0 ) /* 1 means no plugins called */
 219                 rc = SLAP_CB_CONTINUE;
 220         else
 221                 rc = LDAP_SUCCESS; /* confusing: don't abort, but don't send */
 222
 223         slapi_pblock_destroy(pb);
 224
 225         return rc;
 226 }
 227
 228 /*
 229  * Call pre- and post-result plugins
 230  */
 231 static int
 232 slapi_over_result( Operation *op, SlapReply *rs, int type )
 233 {
 234         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 235
 236         assert( rs->sr_type == REP_RESULT || rs->sr_type == REP_SASL || rs->sr_type == REP_EXTENDED );
 237
 238         slapi_over_call_plugins( pb, type );
 239
 240         return SLAP_CB_CONTINUE;
 241 }
 242
 243
 244 static int
 245 slapi_op_bind_callback( Operation *op, SlapReply *rs, int prc )
 246 {
 247         switch ( prc ) {
 248         case SLAPI_BIND_SUCCESS:
 249                 /* Continue with backend processing */
 250                 break;
 251         case SLAPI_BIND_FAIL:
 252                 /* Failure, frontend (that's us) sends result */
 253                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 254                 send_ldap_result( op, rs );
 255                 return rs->sr_err;
 256                 break;
 257         case SLAPI_BIND_ANONYMOUS: /* undocumented */
 258         default: /* plugin sent result or no plugins called */
 259                 BER_BVZERO( &op->orb_edn );
 260
 261                 if ( rs->sr_err == LDAP_SUCCESS ) {
 262                         /*
 263                          * Plugin will have called slapi_pblock_set(LDAP_CONN_DN) which
 264                          * will have set conn->c_dn and conn->c_ndn
 265                          */
 266                         if ( BER_BVISNULL( &op->o_conn->c_ndn ) && prc == 1 ) {
 267                                 /* No plugins were called; continue processing */
 268                                 return LDAP_SUCCESS;
 269                         }
 270                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 271                         if ( !BER_BVISEMPTY( &op->o_conn->c_ndn ) ) {
 272                                 ber_len_t max = sockbuf_max_incoming_auth;
 273                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
 274                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
 275                         }
 276                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 277
 278                         /* log authorization identity */
 279                         Statslog( LDAP_DEBUG_STATS,
 280                                 "%s BIND dn=\"%s\" mech=%s (SLAPI) ssf=0\n",
 281                                 op->o_log_prefix,
 282                                 BER_BVISNULL( &op->o_conn->c_dn )
 283                                         ? "<empty>" : op->o_conn->c_dn.bv_val,
 284                                 BER_BVISNULL( &op->orb_mech )
 285                                         ? "<empty>" : op->orb_mech.bv_val, 0, 0 );
 286
 287                         return -1;
 288                 }
 289                 break;
 290         }
 291
 292         return rs->sr_err;
 293 }
 294
 295 static int
 296 slapi_op_search_callback( Operation *op, SlapReply *rs, int prc )
 297 {
 298         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 299
 300         /* check preoperation result code */
 301         if ( prc < 0 ) {
 302                 return rs->sr_err;
 303         }
 304
 305         rs->sr_err = LDAP_SUCCESS;
 306
 307         if ( pb->pb_intop == 0 &&
 308              slapi_int_call_plugins( op->o_bd, SLAPI_PLUGIN_COMPUTE_SEARCH_REWRITER_FN, pb ) == 0 ) {
 309                 /*
 310                  * The plugin can set the SLAPI_SEARCH_FILTER.
 311                  * SLAPI_SEARCH_STRFILER is not normative.
 312                  */
 313                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 314                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
 315         }
 316
 317         return LDAP_SUCCESS;
 318 }
 319
 320 struct slapi_op_info {
 321         int soi_preop;                  /* preoperation plugin parameter */
 322         int soi_postop;                 /* postoperation plugin parameter */
 323         int soi_internal_preop;         /* internal preoperation plugin parameter */
 324         int soi_internal_postop;        /* internal postoperation plugin parameter */
 325         int (*soi_callback)(Operation *, SlapReply *, int); /* preoperation result handler */
 326 } slapi_op_dispatch_table[] = {
 327         {
 328                 SLAPI_PLUGIN_PRE_BIND_FN,
 329                 SLAPI_PLUGIN_POST_BIND_FN,
 330                 SLAPI_PLUGIN_INTERNAL_PRE_BIND_FN,
 331                 SLAPI_PLUGIN_INTERNAL_POST_BIND_FN,
 332                 slapi_op_bind_callback
 333         },
 334         {
 335                 SLAPI_PLUGIN_PRE_UNBIND_FN,
 336                 SLAPI_PLUGIN_POST_UNBIND_FN,
 337                 SLAPI_PLUGIN_INTERNAL_PRE_UNBIND_FN,
 338                 SLAPI_PLUGIN_INTERNAL_POST_UNBIND_FN,
 339                 NULL
 340         },
 341         {
 342                 SLAPI_PLUGIN_PRE_SEARCH_FN,
 343                 SLAPI_PLUGIN_POST_SEARCH_FN,
 344                 SLAPI_PLUGIN_INTERNAL_PRE_SEARCH_FN,
 345                 SLAPI_PLUGIN_INTERNAL_POST_SEARCH_FN,
 346                 slapi_op_search_callback
 347         },
 348         {
 349                 SLAPI_PLUGIN_PRE_COMPARE_FN,
 350                 SLAPI_PLUGIN_POST_COMPARE_FN,
 351                 SLAPI_PLUGIN_INTERNAL_PRE_COMPARE_FN,
 352                 SLAPI_PLUGIN_INTERNAL_POST_COMPARE_FN,
 353                 NULL
 354         },
 355         {
 356                 SLAPI_PLUGIN_PRE_MODIFY_FN,
 357                 SLAPI_PLUGIN_POST_MODIFY_FN,
 358                 SLAPI_PLUGIN_INTERNAL_PRE_MODIFY_FN,
 359                 SLAPI_PLUGIN_INTERNAL_POST_MODIFY_FN,
 360                 NULL
 361         },
 362         {
 363                 SLAPI_PLUGIN_PRE_MODRDN_FN,
 364                 SLAPI_PLUGIN_POST_MODRDN_FN,
 365                 SLAPI_PLUGIN_INTERNAL_PRE_MODRDN_FN,
 366                 SLAPI_PLUGIN_INTERNAL_POST_MODRDN_FN,
 367                 NULL
 368         },
 369         {
 370                 SLAPI_PLUGIN_PRE_ADD_FN,
 371                 SLAPI_PLUGIN_POST_ADD_FN,
 372                 SLAPI_PLUGIN_INTERNAL_PRE_ADD_FN,
 373                 SLAPI_PLUGIN_INTERNAL_POST_ADD_FN,
 374                 NULL
 375         },
 376         {
 377                 SLAPI_PLUGIN_PRE_DELETE_FN,
 378                 SLAPI_PLUGIN_POST_DELETE_FN,
 379                 SLAPI_PLUGIN_INTERNAL_PRE_DELETE_FN,
 380                 SLAPI_PLUGIN_INTERNAL_POST_DELETE_FN,
 381                 NULL
 382         },
 383         {
 384                 SLAPI_PLUGIN_PRE_ABANDON_FN,
 385                 SLAPI_PLUGIN_POST_ABANDON_FN,
 386                 SLAPI_PLUGIN_INTERNAL_PRE_ABANDON_FN,
 387                 SLAPI_PLUGIN_INTERNAL_POST_ABANDON_FN,
 388                 NULL
 389         },
 390         {
 391                 0,
 392                 0,
 393                 0,
 394                 0,
 395                 NULL
 396         }
 397 };
 398
 399 slap_operation_t
 400 slapi_tag2op( ber_tag_t tag )
 401 {
 402         slap_operation_t op;
 403
 404         switch ( tag ) {
 405         case LDAP_REQ_BIND:
 406                 op = op_bind;
 407                 break;
 408         case LDAP_REQ_ADD:
 409                 op = op_add;
 410                 break;
 411         case LDAP_REQ_DELETE:
 412                 op = op_delete;
 413                 break;
 414         case LDAP_REQ_MODRDN:
 415                 op = op_modrdn;
 416                 break;
 417         case LDAP_REQ_MODIFY:
 418                 op = op_modify;
 419                 break;
 420         case LDAP_REQ_COMPARE:
 421                 op = op_compare;
 422                 break;
 423         case LDAP_REQ_SEARCH:
 424                 op = op_search;
 425                 break;
 426         case LDAP_REQ_UNBIND:
 427                 op = op_unbind;
 428                 break;
 429         default:
 430                 op = op_last;
 431                 break;
 432         }
 433
 434         return op;
 435 }
 436
 437 /* Add SLAPI_RESCONTROLS to rs->sr_ctrls, with care, because
 438  * rs->sr_ctrls could be allocated on the stack */
 439 static int
 440 slapi_over_merge_controls( Operation *op, SlapReply *rs )
 441 {
 442         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 443         LDAPControl             **ctrls = NULL;
 444         LDAPControl             **slapi_ctrls = NULL;
 445         size_t                  n_slapi_ctrls = 0;
 446         size_t                  n_rs_ctrls = 0;
 447         size_t                  i;
 448
 449         slapi_pblock_get( pb, SLAPI_RESCONTROLS, (void **)&slapi_ctrls );
 450
 451         n_slapi_ctrls = slapi_int_count_controls( slapi_ctrls );
 452         n_rs_ctrls = slapi_int_count_controls( rs->sr_ctrls );
 453
 454         slapi_pblock_set( pb, SLAPI_X_OLD_RESCONTROLS, (void *)rs->sr_ctrls );
 455
 456         if ( n_slapi_ctrls == 0 )
 457                 return LDAP_SUCCESS; /* no SLAPI controls */
 458
 459         ctrls = (LDAPControl **) op->o_tmpalloc(
 460                 ( n_slapi_ctrls + n_rs_ctrls + 1 ) * sizeof(LDAPControl *),
 461                 op->o_tmpmemctx );
 462
 463         for ( i = 0; i < n_slapi_ctrls; i++ ) {
 464                 ctrls[i] = slapi_ctrls[i];
 465         }
 466         if ( rs->sr_ctrls != NULL ) {
 467                 for ( i = 0; i < n_rs_ctrls; i++ ) {
 468                         ctrls[n_slapi_ctrls + i] = rs->sr_ctrls[i];
 469                 }
 470         }
 471         ctrls[n_slapi_ctrls + n_rs_ctrls] = NULL;
 472
 473         rs->sr_ctrls = ctrls;
 474
 475         return LDAP_SUCCESS;
 476 }
 477
 478 static int
 479 slapi_over_unmerge_controls( Operation *op, SlapReply *rs )
 480 {
 481         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 482         LDAPControl             **rs_ctrls = NULL;
 483
 484         slapi_pblock_get( pb, SLAPI_X_OLD_RESCONTROLS, (void **)&rs_ctrls );
 485
 486         if ( rs_ctrls == NULL || rs->sr_ctrls == rs_ctrls ) {
 487                 /* no copying done */
 488                 return LDAP_SUCCESS;
 489         }
 490
 491         op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 492         rs->sr_ctrls = rs_ctrls;
 493
 494         return LDAP_SUCCESS;
 495 }
 496
 497 static int
 498 slapi_over_response( Operation *op, SlapReply *rs )
 499 {
 500         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 501         int                     rc = SLAP_CB_CONTINUE;
 502
 503         if ( pb->pb_intop == 0 ) {
 504                 switch ( rs->sr_type ) {
 505                 case REP_RESULT:
 506                 case REP_SASL:
 507                 case REP_EXTENDED:
 508                         rc = slapi_over_result( op, rs, SLAPI_PLUGIN_PRE_RESULT_FN );
 509                         break;
 510                 case REP_SEARCH:
 511                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_ENTRY_FN );
 512                         break;
 513                 case REP_SEARCHREF:
 514                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_REFERRAL_FN );
 515                         break;
 516                 default:
 517                         break;
 518                 }
 519         }
 520
 521         slapi_over_merge_controls( op, rs );
 522
 523         return rc;
 524 }
 525
 526 static int
 527 slapi_over_cleanup( Operation *op, SlapReply *rs )
 528 {
 529         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 530         int                     rc = SLAP_CB_CONTINUE;
 531
 532         slapi_over_unmerge_controls( op, rs );
 533
 534         if ( pb->pb_intop == 0 ) {
 535                 switch ( rs->sr_type ) {
 536                 case REP_RESULT:
 537                 case REP_SASL:
 538                 case REP_EXTENDED:
 539                         rc = slapi_over_result( op, rs, SLAPI_PLUGIN_POST_RESULT_FN );
 540                         break;
 541                 case REP_SEARCH:
 542                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_ENTRY_FN );
 543                         break;
 544                 case REP_SEARCHREF:
 545                         rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_REFERRAL_FN );
 546                         break;
 547                 default:
 548                         break;
 549                 }
 550         }
 551
 552         return rc;
 553 }
 554
 555 static int
 556 slapi_op_func( Operation *op, SlapReply *rs )
 557 {
 558         Slapi_PBlock            *pb;
 559         slap_operation_t        which;
 560         struct slapi_op_info    *opinfo;
 561         int                     rc;
 562         slap_overinfo           *oi;
 563         slap_overinst           *on;
 564         slap_callback           cb;
 565         int                     internal_op;
 566         int                     preop_type, postop_type;
 567         BackendDB               *be;
 568
 569         if ( !slapi_plugins_used )
 570                 return SLAP_CB_CONTINUE;
 571
 572         /*
 573          * Find the SLAPI operation information for this LDAP
 574          * operation; this will contain the preop and postop
 575          * plugin types, as well as optional callbacks for
 576          * setting up the SLAPI environment.
 577          */
 578         which = slapi_tag2op( op->o_tag );
 579         if ( which >= op_last ) {
 580                 /* invalid operation, but let someone else deal with it */
 581                 return SLAP_CB_CONTINUE;
 582         }
 583
 584         opinfo = &slapi_op_dispatch_table[which];
 585         if ( opinfo == NULL ) {
 586                 /* no SLAPI plugin types for this operation */
 587                 return SLAP_CB_CONTINUE;
 588         }
 589
 590         internal_op = slapi_op_internal_p( op, rs, &cb );
 591
 592         if ( internal_op ) {
 593                 preop_type = opinfo->soi_internal_preop;
 594                 postop_type = opinfo->soi_internal_postop;
 595         } else {
 596                 preop_type = opinfo->soi_preop;
 597                 postop_type = opinfo->soi_postop;
 598         }
 599
 600         if ( preop_type == 0 ) {
 601                 /* no SLAPI plugin types for this operation */
 602                 pb = NULL;
 603                 rc = SLAP_CB_CONTINUE;
 604                 goto cleanup;
 605         }
 606
 607         pb = SLAPI_OPERATION_PBLOCK( op );
 608
 609         /* cache backend so we call correct postop plugins */
 610         be = pb->pb_op->o_bd;
 611
 612         rc = slapi_int_call_plugins( be, preop_type, pb );
 613
 614         /*
 615          * soi_callback is responsible for examining the result code
 616          * of the preoperation plugin and determining whether to
 617          * abort. This is needed because of special SLAPI behaviour
 618          e with bind preoperation plugins.
 619          *
 620          * The soi_callback function is also used to reset any values
 621          * returned from the preoperation plugin before calling the
 622          * backend (for the success case).
 623          */
 624         if ( opinfo->soi_callback == NULL ) {
 625                 /* default behaviour is preop plugin can abort operation */
 626                 if ( rc < 0 ) {
 627                         rc = rs->sr_err;
 628                         goto cleanup;
 629                 }
 630         } else {
 631                 rc = (opinfo->soi_callback)( op, rs, rc );
 632                 if ( rc )
 633                         goto cleanup;
 634         }
 635
 636         /*
 637          * Call actual backend (or next overlay in stack). We need to
 638          * do this rather than returning SLAP_CB_CONTINUE and calling
 639          * postoperation plugins in a response handler to match the
 640          * behaviour of SLAPI in OpenLDAP 2.2, where postoperation
 641          * plugins are called after the backend has completely
 642          * finished processing the operation.
 643          */
 644         on = (slap_overinst *)op->o_bd->bd_info;
 645         oi = on->on_info;
 646
 647         rc = overlay_op_walk( op, rs, which, oi, on->on_next );
 648
 649         /*
 650          * Call postoperation plugins
 651          */
 652         slapi_int_call_plugins( be, postop_type, pb );
 653
 654 cleanup:
 655         if ( !internal_op ) {
 656                 slapi_pblock_destroy(pb);
 657                 cb.sc_private = NULL;
 658         }
 659
 660         op->o_callback = cb.sc_next;
 661
 662         return rc;
 663 }
 664
 665 static int
 666 slapi_over_extended( Operation *op, SlapReply *rs )
 667 {
 668         Slapi_PBlock    *pb;
 669         SLAPI_FUNC      callback;
 670         int             rc;
 671         int             internal_op;
 672         slap_callback   cb;
 673
 674         slapi_int_get_extop_plugin( &op->ore_reqoid, &callback );
 675         if ( callback == NULL ) {
 676                 return SLAP_CB_CONTINUE;
 677         }
 678
 679         internal_op = slapi_op_internal_p( op, rs, &cb );
 680         if ( internal_op ) {
 681                 return SLAP_CB_CONTINUE;
 682         }
 683
 684         pb = SLAPI_OPERATION_PBLOCK( op );
 685
 686         rc = (*callback)( pb );
 687         if ( rc == SLAPI_PLUGIN_EXTENDED_SENT_RESULT ) {
 688                 goto cleanup;
 689         } else if ( rc == SLAPI_PLUGIN_EXTENDED_NOT_HANDLED ) {
 690                 rc = SLAP_CB_CONTINUE;
 691                 goto cleanup;
 692         }
 693
 694         assert( rs->sr_rspoid != NULL );
 695
 696         send_ldap_extended( op, rs );
 697
 698 #if 0
 699         slapi_ch_free_string( (char **)&rs->sr_rspoid );
 700 #endif
 701
 702         if ( rs->sr_rspdata != NULL )
 703                 ber_bvfree( rs->sr_rspdata );
 704
 705         rc = rs->sr_err;
 706
 707 cleanup:
 708         slapi_pblock_destroy( pb );
 709         op->o_callback = cb.sc_next;
 710
 711         return rc;
 712 }
 713
 714 static int
 715 slapi_over_access_allowed(
 716         Operation               *op,
 717         Entry                   *e,
 718         AttributeDescription    *desc,
 719         struct berval           *val,
 720         slap_access_t           access,
 721         AccessControlState      *state,
 722         slap_mask_t             *maskp )
 723 {
 724         int                     rc;
 725         Slapi_PBlock            *pb;
 726         slap_callback           cb;
 727         int                     internal_op;
 728         SlapReply               rs = { REP_RESULT };
 729
 730         internal_op = slapi_op_internal_p( op, &rs, &cb );
 731
 732         cb.sc_response = NULL;
 733         cb.sc_cleanup = NULL;
 734
 735         pb = SLAPI_OPERATION_PBLOCK( op );
 736
 737         rc = slapi_int_access_allowed( op, e, desc, val, access, state );
 738         if ( rc ) {
 739                 rc = SLAP_CB_CONTINUE;
 740         }
 741
 742         if ( !internal_op ) {
 743                 slapi_pblock_destroy( pb );
 744         }
 745
 746         op->o_callback = cb.sc_next;
 747
 748         return rc;
 749 }
 750
 751 static int
 752 slapi_over_acl_group(
 753         Operation               *op,
 754         Entry                   *target,
 755         struct berval           *gr_ndn,
 756         struct berval           *op_ndn,
 757         ObjectClass             *group_oc,
 758         AttributeDescription    *group_at )
 759 {
 760         Slapi_Entry             *e;
 761         int                     rc;
 762         Slapi_PBlock            *pb;
 763         BackendDB               *be = op->o_bd;
 764         GroupAssertion          *g;
 765         SlapReply               rs = { REP_RESULT };
 766
 767         op->o_bd = select_backend( gr_ndn, 0 );
 768
 769         for ( g = op->o_groups; g; g = g->ga_next ) {
 770                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
 771                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
 772                 {
 773                         continue;
 774                 }
 775                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
 776                         break;
 777                 }
 778         }
 779         if ( g != NULL ) {
 780                 rc = g->ga_res;
 781                 goto done;
 782         }
 783
 784         if ( target != NULL && dn_match( &target->e_nname, gr_ndn ) ) {
 785                 e = target;
 786                 rc = 0;
 787         } else {
 788                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
 789         }
 790         if ( e != NULL ) {
 791                 int                     internal_op;
 792                 slap_callback           cb;
 793
 794                 internal_op = slapi_op_internal_p( op, &rs, &cb );
 795
 796                 cb.sc_response = NULL;
 797                 cb.sc_cleanup = NULL;
 798
 799                 pb = SLAPI_OPERATION_PBLOCK( op );
 800
 801                 slapi_pblock_set( pb, SLAPI_X_GROUP_ENTRY,        (void *)e );
 802                 slapi_pblock_set( pb, SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
 803                 slapi_pblock_set( pb, SLAPI_X_GROUP_ATTRIBUTE,    (void *)group_at->ad_cname.bv_val );
 804                 slapi_pblock_set( pb, SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
 805
 806                 rc = slapi_over_call_plugins( pb, SLAPI_X_PLUGIN_PRE_GROUP_FN );
 807                 if ( rc >= 0 ) /* 1 means no plugins called */
 808                         rc = SLAP_CB_CONTINUE;
 809                 else
 810                         rc = pb->pb_rs->sr_err;
 811
 812                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_ENTRY );
 813                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_OPERATION_DN );
 814                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_ATTRIBUTE );
 815                 slapi_pblock_delete_param( pb, SLAPI_X_GROUP_TARGET_ENTRY );
 816
 817                 if ( !internal_op )
 818                         slapi_pblock_destroy( pb );
 819
 820                 if ( e != target ) {
 821                         be_entry_release_r( op, e );
 822                 }
 823
 824                 op->o_callback = cb.sc_next;
 825         } else {
 826                 rc = LDAP_NO_SUCH_OBJECT; /* return SLAP_CB_CONTINUE for correctness? */
 827         }
 828
 829         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache &&
 830              rc != SLAP_CB_CONTINUE ) {
 831                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
 832                         op->o_tmpmemctx );
 833                 g->ga_be = op->o_bd;
 834                 g->ga_oc = group_oc;
 835                 g->ga_at = group_at;
 836                 g->ga_res = rc;
 837                 g->ga_len = gr_ndn->bv_len;
 838                 strcpy( g->ga_ndn, gr_ndn->bv_val );
 839                 g->ga_next = op->o_groups;
 840                 op->o_groups = g;
 841         }
 842         /*
 843          * XXX don't call POST_GROUP_FN, I have no idea what the point of
 844          * that plugin function was anyway
 845          */
 846 done:
 847         op->o_bd = be;
 848         return rc;
 849 }
 850
 851 static int
 852 slapi_over_db_open(
 853         BackendDB       *be,
 854         ConfigReply     *cr )
 855 {
 856         Slapi_PBlock            *pb;
 857         int                     rc;
 858
 859         pb = slapi_pblock_new();
 860
 861         rc = slapi_int_call_plugins( be, SLAPI_PLUGIN_START_FN, pb );
 862
 863         slapi_pblock_destroy( pb );
 864
 865         return rc;
 866 }
 867
 868 static int
 869 slapi_over_db_close(
 870         BackendDB       *be,
 871         ConfigReply     *cr )
 872 {
 873         Slapi_PBlock            *pb;
 874         int                     rc;
 875
 876         pb = slapi_pblock_new();
 877
 878         rc = slapi_int_call_plugins( be, SLAPI_PLUGIN_CLOSE_FN, pb );
 879
 880         slapi_pblock_destroy( pb );
 881
 882         return rc;
 883 }
 884
 885 static int
 886 slapi_over_init()
 887 {
 888         memset( &slapi, 0, sizeof(slapi) );
 889
 890         slapi.on_bi.bi_type = SLAPI_OVERLAY_NAME;
 891
 892         slapi.on_bi.bi_op_bind          = slapi_op_func;
 893         slapi.on_bi.bi_op_unbind        = slapi_op_func;
 894         slapi.on_bi.bi_op_search        = slapi_op_func;
 895         slapi.on_bi.bi_op_compare       = slapi_op_func;
 896         slapi.on_bi.bi_op_modify        = slapi_op_func;
 897         slapi.on_bi.bi_op_modrdn        = slapi_op_func;
 898         slapi.on_bi.bi_op_add           = slapi_op_func;
 899         slapi.on_bi.bi_op_delete        = slapi_op_func;
 900         slapi.on_bi.bi_op_abandon       = slapi_op_func;
 901         slapi.on_bi.bi_op_cancel        = slapi_op_func;
 902
 903         slapi.on_bi.bi_db_open          = slapi_over_db_open;
 904         slapi.on_bi.bi_db_close         = slapi_over_db_close;
 905
 906         slapi.on_bi.bi_extended         = slapi_over_extended;
 907         slapi.on_bi.bi_access_allowed   = slapi_over_access_allowed;
 908         slapi.on_bi.bi_operational      = slapi_over_aux_operational;
 909         slapi.on_bi.bi_acl_group        = slapi_over_acl_group;
 910
 911         return overlay_register( &slapi );
 912 }
 913
 914 int slapi_over_is_inst( BackendDB *be )
 915 {
 916         return overlay_is_inst( be, SLAPI_OVERLAY_NAME );
 917 }
 918
 919 int slapi_over_config( BackendDB *be, ConfigReply *cr )
 920 {
 921         if ( slapi_over_initialized == 0 ) {
 922                 int rc;
 923
 924                 /* do global initializaiton */
 925                 ldap_pvt_thread_mutex_init( &slapi_hn_mutex );
 926                 ldap_pvt_thread_mutex_init( &slapi_time_mutex );
 927                 ldap_pvt_thread_mutex_init( &slapi_printmessage_mutex );
 928
 929                 if ( slapi_log_file == NULL )
 930                         slapi_log_file = slapi_ch_strdup( LDAP_RUNDIR LDAP_DIRSEP "errors" );
 931
 932                 rc = slapi_int_init_object_extensions();
 933                 if ( rc != 0 )
 934                         return rc;
 935
 936                 rc = slapi_over_init();
 937                 if ( rc != 0 )
 938                         return rc;
 939
 940                 slapi_over_initialized = 1;
 941         }
 942
 943         return overlay_config( be, SLAPI_OVERLAY_NAME, -1, NULL, cr );
 944 }
 945
 946 #endif /* LDAP_SLAPI */