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
  36 slapi_over_compute_output(
  37         computed_attr_context *c,
  38         Slapi_Attr *attribute,
  39         Slapi_Entry *entry
  40 )
  41 {
  42         int                     rc;
  43         Attribute               **a;
  44         AttributeDescription    *desc;
  45         Operation               *op = c->cac_op;
  46         SlapReply               *rs = (SlapReply *)c->cac_private;
  47
  48         if ( c == NULL || attribute == NULL || entry == NULL ) {
  49                 return 0;
  50         }
  51
  52         assert( rs->sr_entry == entry );
  53
  54         desc = attribute->a_desc;
  55
  56         if ( rs->sr_attrs == NULL ) {
  57                 /* All attrs request, skip operational attributes */
  58                 if ( is_at_operational( desc->ad_type ) ) {
  59                         return 0;
  60                 }
  61         } else {
  62                 /* Specific attributes requested */
  63                 if ( is_at_operational( desc->ad_type ) ) {
  64                         if ( !SLAP_OPATTRS( rs->sr_attr_flags ) &&
  65                              !ad_inlist( desc, rs->sr_attrs ) ) {
  66                                 return 0;
  67                         }
  68                 } else {
  69                         if ( !SLAP_USERATTRS( rs->sr_attr_flags ) &&
  70                              !ad_inlist( desc, rs->sr_attrs ) ) {
  71                                 return 0;
  72                         }
  73                 }
  74         }
  75
  76         if ( !access_allowed( op, entry, desc, NULL, ACL_READ, c->cac_acl_state) ) {
  77                 slapi_log_error( SLAPI_LOG_ACL, "slapi_over_compute_output",
  78                         "acl: access to attribute %s not allowed\n",
  79                         desc->ad_cname.bv_val );
  80                 return 0;
  81         }
  82
  83         for ( a = &rs->sr_operational_attrs; *a != NULL; a = &(*a)->a_next )
  84                 ;
  85
  86         *a = attr_dup( attribute );
  87
  88         return 0;
  89 }
  90
  91 static int
  92 slapi_over_aux_operational( Operation *op, SlapReply *rs )
  93 {
  94         /* Support for computed attribute plugins */
  95         computed_attr_context    ctx;
  96         AttributeName           *anp;
  97         AccessControlState      acl_state = ACL_STATE_INIT;
  98
  99         ctx.cac_pb = SLAPI_OPERATION_PBLOCK( op );
 100         ctx.cac_op = op;
 101         ctx.cac_private = rs;
 102         ctx.cac_acl_state = &acl_state;
 103
 104         if ( rs->sr_entry != NULL ) {
 105                 /*
 106                  * For each client requested attribute, call the plugins.
 107                  */
 108                 if ( rs->sr_attrs != NULL ) {
 109                         for ( anp = rs->sr_attrs; anp->an_name.bv_val != NULL; anp++ ) {
 110                                 if ( compute_evaluator( &ctx, anp->an_name.bv_val,
 111                                         rs->sr_entry, slapi_over_compute_output ) == 1 ) {
 112                                         break;
 113                                 }
 114                         }
 115                 } else {
 116                         /*
 117                          * Technically we shouldn't be returning operational attributes
 118                          * when the user requested only user attributes. We'll let the
 119                          * plugin decide whether to be naughty or not.
 120                          */
 121                         compute_evaluator( &ctx, "*", rs->sr_entry, slapi_over_compute_output );
 122                 }
 123         }
 124
 125         return SLAP_CB_CONTINUE;
 126 }
 127
 128 static int
 129 slapi_over_search( Operation *op, SlapReply *rs, int type )
 130 {
 131         int                     rc;
 132         Slapi_PBlock            *pb;
 133
 134         assert( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF );
 135
 136         pb = slapi_pblock_new();
 137
 138         slapi_int_pblock_set_operation( pb, op );
 139         slapi_pblock_set( pb, SLAPI_RESCONTROLS, (void *)rs->sr_ctrls );
 140         slapi_pblock_set( pb, SLAPI_SEARCH_RESULT_ENTRY, (void *)rs->sr_entry );
 141
 142         rc = slapi_int_call_plugins( op->o_bd, type, pb );
 143         if ( rc >= 0 ) /* 1 means no plugins called */
 144                 rc = SLAP_CB_CONTINUE;
 145         else
 146                 rc = LDAP_SUCCESS; /* confusing: don't abort, but don't send */
 147
 148         slapi_pblock_set( pb, SLAPI_RESCONTROLS, NULL ); /* don't free */
 149         slapi_pblock_destroy(pb);
 150
 151         return rc;
 152 }
 153
 154 static int
 155 slapi_over_merge_controls( Operation *op, SlapReply *rs, Slapi_PBlock *pb)
 156 {
 157         LDAPControl             **slapiControls = NULL, **mergedControls;
 158         int                     nSlapiControls = 0;
 159         int                     nResControls = 0;
 160         int                     i;
 161
 162         /* merge in controls */
 163         if ( rs->sr_ctrls != NULL ) {
 164                 for ( nResControls = 0; rs->sr_ctrls[nResControls] != NULL; nResControls++ )
 165                         ;
 166         }
 167         slapi_pblock_get( pb, SLAPI_RESCONTROLS, (void **)&slapiControls );
 168         if ( slapiControls != NULL ) {
 169                 for ( nSlapiControls = 0; slapiControls[nSlapiControls] != NULL; nSlapiControls++ )
 170                         ;
 171         }
 172
 173         if ( nResControls + nSlapiControls == 0 ) {
 174                 /* short-circuit */
 175                 return LDAP_SUCCESS;
 176         }
 177
 178         /* XXX this is a bit tricky, rs->sr_ctrls may have been allocated on stack */
 179         mergedControls = (LDAPControl **)op->o_tmpalloc( ( nResControls + nSlapiControls + 1 ) *
 180                                                          sizeof( LDAPControl *), op->o_tmpmemctx );
 181         if ( mergedControls == NULL ) {
 182                 return LDAP_OTHER;
 183         }
 184
 185         if ( rs->sr_ctrls != NULL ) {
 186                 for ( i = 0; i < nResControls; i++ )
 187                         mergedControls[i] = rs->sr_ctrls[i];
 188         }
 189         if ( slapiControls != NULL ) {
 190                 for ( i = 0; i < nSlapiControls; i++ )
 191                         mergedControls[nResControls + i] = slapiControls[i];
 192         }
 193         mergedControls[nResControls + nSlapiControls] = NULL;
 194
 195         if ( slapiControls != NULL ) {
 196                 slapi_ch_free( (void **)&slapiControls );
 197                 slapi_pblock_set( pb, SLAPI_RESCONTROLS, NULL ); /* don't free */
 198         }
 199
 200         rs->sr_ctrls = mergedControls;
 201
 202         return LDAP_SUCCESS;
 203 }
 204
 205 static int
 206 slapi_over_result( Operation *op, SlapReply *rs, int type )
 207 {
 208         int                     rc;
 209         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 210
 211         assert( rs->sr_type == REP_RESULT );
 212
 213         slapi_pblock_set( pb, SLAPI_RESULT_CODE,    (void *)rs->sr_err );
 214         slapi_pblock_set( pb, SLAPI_RESULT_TEXT,    (void *)rs->sr_text );
 215         slapi_pblock_set( pb, SLAPI_RESULT_MATCHED, (void *)rs->sr_matched );
 216
 217         rc = slapi_int_call_plugins( op->o_bd, type, pb );
 218
 219         slapi_pblock_get( pb, SLAPI_RESULT_CODE,    (void **)&rs->sr_err );
 220         slapi_pblock_get( pb, SLAPI_RESULT_TEXT,    (void **)&rs->sr_text );
 221         slapi_pblock_get( pb, SLAPI_RESULT_MATCHED, (void **)&rs->sr_matched );
 222
 223         if ( type == SLAPI_PLUGIN_PRE_RESULT_FN ) {
 224                 rc = slapi_over_merge_controls( op, rs, pb );
 225         }
 226
 227         return SLAP_CB_CONTINUE;
 228 }
 229
 230 static int
 231 slapi_op_add_init( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 232 {
 233         slapi_pblock_set( pb, SLAPI_ADD_ENTRY, (void *)op->ora_e );
 234
 235         return LDAP_SUCCESS;
 236 }
 237
 238 static int
 239 slapi_op_bind_preop_init( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 240 {
 241         slapi_pblock_set( pb, SLAPI_BIND_TARGET,      (void *)op->o_req_dn.bv_val );
 242         slapi_pblock_set( pb, SLAPI_BIND_METHOD,      (void *)op->orb_method );
 243         slapi_pblock_set( pb, SLAPI_BIND_CREDENTIALS, (void *)&op->orb_cred );
 244         slapi_pblock_set( pb, SLAPI_CONN_DN,          NULL );
 245
 246         return LDAP_SUCCESS;
 247 }
 248
 249 static int
 250 slapi_op_bind_postop_init( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 251 {
 252         char *dn = NULL;
 253
 254         if ( rs->sr_err == LDAP_SUCCESS ) {
 255                 /* fix for ITS#2971 */
 256                 slapi_pblock_set( pb, SLAPI_CONN_DN, op->o_conn->c_authz.sai_dn.bv_val );
 257         }
 258
 259         return LDAP_SUCCESS;
 260 }
 261
 262 static int
 263 slapi_op_bind_callback( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 264 {
 265         int rc = rs->sr_err;
 266
 267         switch ( rc ) {
 268         case SLAPI_BIND_SUCCESS:
 269                 /* Continue with backend processing */
 270                 break;
 271         case SLAPI_BIND_FAIL:
 272                 /* Failure, frontend (that's us) sends result */
 273                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 274                 send_ldap_result( op, rs );
 275                 return rs->sr_err;
 276                 break;
 277         case SLAPI_BIND_ANONYMOUS: /* undocumented */
 278         default:
 279                 /*
 280                  * Plugin sent authoritative result or no plugins were called
 281                  */
 282                 if ( slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void **)&rs->sr_err ) != 0 ) {
 283                         rs->sr_err = LDAP_OTHER;
 284                 }
 285
 286                 BER_BVZERO( &op->orb_edn );
 287
 288                 if ( rs->sr_err == LDAP_SUCCESS ) {
 289                         slapi_pblock_get( pb, SLAPI_CONN_DN, (void *)&op->orb_edn.bv_val );
 290                         if ( BER_BVISNULL( &op->orb_edn ) ) {
 291                                 if ( rc == 1 ) {
 292                                         /* No plugins were called; continue processing */
 293                                         return LDAP_SUCCESS;
 294                                 }
 295                         } else {
 296                                 op->orb_edn.bv_len = strlen( op->orb_edn.bv_val );
 297                         }
 298                         rs->sr_err = dnPrettyNormal( NULL, &op->orb_edn,
 299                                 &op->o_req_dn, &op->o_req_ndn, op->o_tmpmemctx );
 300
 301                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 302                         ber_dupbv(&op->o_conn->c_dn, &op->o_req_dn);
 303                         ber_dupbv(&op->o_conn->c_ndn, &op->o_req_ndn);
 304                         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
 305                         BER_BVZERO( &op->o_req_dn );
 306                         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 307                         BER_BVZERO( &op->o_req_ndn );
 308                         if ( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
 309                                 ber_len_t max = sockbuf_max_incoming_auth;
 310                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
 311                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
 312                         }
 313
 314                         /* log authorization identity */
 315                         Statslog( LDAP_DEBUG_STATS,
 316                                 "%s BIND dn=\"%s\" mech=%s (SLAPI) ssf=0\n",
 317                                 op->o_log_prefix,
 318                                 BER_BVISNULL( &op->o_conn->c_dn )
 319                                         ? "<empty>" : op->o_conn->c_dn.bv_val,
 320                                 op->orb_tmp_mech.bv_val, 0, 0 );
 321
 322                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 323                         return -1;
 324                 }
 325                 break;
 326         }
 327
 328         return rc;
 329 }
 330
 331 static int
 332 slapi_op_compare_init( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 333 {
 334         slapi_pblock_set( pb, SLAPI_COMPARE_TYPE,  (void *)op->orc_ava->aa_desc->ad_cname.bv_val );
 335         slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&op->orc_ava->aa_value );
 336
 337         return LDAP_SUCCESS;
 338 }
 339
 340 static int
 341 slapi_op_modify_init( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 342 {
 343         LDAPMod         **modv = NULL;
 344
 345         modv = slapi_int_modifications2ldapmods( &op->orm_modlist );
 346         slapi_pblock_set( pb, SLAPI_MODIFY_MODS, (void *)modv );
 347
 348         return LDAP_SUCCESS;
 349 }
 350
 351 static int
 352 slapi_op_modify_callback( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 353 {
 354         LDAPMod         **modv = NULL;
 355
 356         /* check preoperation result code */
 357         if ( rs->sr_err < 0 ) {
 358                 slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void **)&rs->sr_err );
 359                 return rs->sr_err;
 360         }
 361
 362         /*
 363          * NB: it is valid for the plugin to return no modifications
 364          * (for example, a plugin might store some attributes elsewhere
 365          * and remove them from the modification list; if only those
 366          * attribute types were included in the modification request,
 367          * then slapi_int_ldapmods2modifications() above will return
 368          * NULL).
 369          *
 370          * However, the post-operation plugin should still be
 371          * called.
 372          */
 373
 374         slapi_pblock_get( pb, SLAPI_MODIFY_MODS, (void **)&modv );
 375         op->orm_modlist = slapi_int_ldapmods2modifications( modv );
 376
 377         return LDAP_SUCCESS;
 378 }
 379
 380 static int
 381 slapi_op_modify_cleanup( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 382 {
 383         LDAPMod         **modv = NULL;
 384
 385         slapi_pblock_get( pb, SLAPI_MODIFY_MODS, (void **)&modv );
 386
 387         if ( modv != NULL )
 388                 slapi_int_free_ldapmods( modv );
 389
 390         return LDAP_SUCCESS;
 391 }
 392
 393 static int
 394 slapi_op_modrdn_init( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 395 {
 396         slapi_pblock_set( pb, SLAPI_MODRDN_NEWRDN,      (void *)op->orr_newrdn.bv_val );
 397         slapi_pblock_set( pb, SLAPI_MODRDN_NEWSUPERIOR, (void *)op->orr_newSup->bv_val );
 398         slapi_pblock_set( pb, SLAPI_MODRDN_DELOLDRDN,   (void *)op->orr_deleteoldrdn );
 399
 400         return LDAP_SUCCESS;
 401 }
 402
 403 static int
 404 slapi_op_search_init( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 405 {
 406         char            **attrs;
 407
 408         attrs = anlist2charray_x( op->ors_attrs, 0, op->o_tmpmemctx );
 409
 410         slapi_pblock_set( pb, SLAPI_SEARCH_SCOPE,     (void *)op->ors_scope );
 411         slapi_pblock_set( pb, SLAPI_SEARCH_DEREF,     (void *)op->ors_deref );
 412         slapi_pblock_set( pb, SLAPI_SEARCH_SIZELIMIT, (void *)op->ors_slimit );
 413         slapi_pblock_set( pb, SLAPI_SEARCH_TIMELIMIT, (void *)op->ors_tlimit );
 414         slapi_pblock_set( pb, SLAPI_SEARCH_FILTER,    (void *)op->ors_filter );
 415         slapi_pblock_set( pb, SLAPI_SEARCH_STRFILTER, (void *)op->ors_filterstr.bv_val );
 416         slapi_pblock_set( pb, SLAPI_SEARCH_ATTRS,     (void *)attrs );
 417         slapi_pblock_set( pb, SLAPI_SEARCH_ATTRSONLY, (void *)op->ors_attrsonly );
 418
 419         return LDAP_SUCCESS;
 420 }
 421
 422 static int
 423 slapi_op_search_callback( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 424 {
 425         /* check preoperation result code */
 426         if ( rs->sr_err < 0 ) {
 427                 slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void **)&rs->sr_err );
 428                 return rs->sr_err;
 429         }
 430
 431         if ( slapi_int_call_plugins( op->o_bd, SLAPI_PLUGIN_COMPUTE_SEARCH_REWRITER_FN, pb ) != 0 ) {
 432                 return LDAP_SUCCESS;
 433         }
 434
 435         /*
 436          * The plugin can set the SLAPI_SEARCH_FILTER.
 437          * SLAPI_SEARCH_STRFILER is not normative.
 438          */
 439         slapi_pblock_get( pb, SLAPI_SEARCH_FILTER, (void *)&op->ors_filter );
 440         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 441         filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
 442
 443         slapi_pblock_get( pb, SLAPI_SEARCH_TARGET, (void **)&op->o_req_dn.bv_val );
 444         op->o_req_dn.bv_len = strlen( op->o_req_dn.bv_val );
 445
 446         if( !BER_BVISNULL( &op->o_req_ndn ) ) {
 447                 slap_sl_free( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 448         }
 449         rs->sr_err = dnNormalize( 0, NULL, NULL, &op->o_req_dn, &op->o_req_ndn,
 450                                   op->o_tmpmemctx );
 451         if ( rs->sr_err != LDAP_SUCCESS ) {
 452                 send_ldap_result( op, rs );
 453                 return rs->sr_err;
 454         }
 455
 456         slapi_pblock_get( pb, SLAPI_SEARCH_SCOPE, (void **)&op->ors_scope );
 457         slapi_pblock_get( pb, SLAPI_SEARCH_DEREF, (void **)&op->ors_deref );
 458
 459         return LDAP_SUCCESS;
 460 }
 461
 462 static int
 463 slapi_op_search_cleanup( Operation *op, SlapReply *rs, Slapi_PBlock *pb )
 464 {
 465         char            **attrs = NULL;
 466
 467         slapi_pblock_get( pb, SLAPI_SEARCH_ATTRS,     (void *)&attrs );
 468
 469         if ( attrs != NULL )
 470                 op->o_tmpfree( attrs, op->o_tmpmemctx );
 471
 472         return LDAP_SUCCESS;
 473 }
 474
 475 typedef int (slapi_over_callback)( Operation *, SlapReply *rs, Slapi_PBlock * );
 476
 477 struct slapi_op_info {
 478         int soi_preop;
 479         int soi_postop;
 480         slapi_over_callback *soi_preop_init;
 481         slapi_over_callback *soi_callback;
 482         slapi_over_callback *soi_postop_init;
 483         slapi_over_callback *soi_cleanup;
 484 } slapi_op_dispatch_table[] = {
 485         {
 486                 SLAPI_PLUGIN_PRE_BIND_FN,
 487                 SLAPI_PLUGIN_POST_BIND_FN,
 488                 slapi_op_bind_preop_init,
 489                 slapi_op_bind_callback,
 490                 slapi_op_bind_postop_init,
 491                 NULL
 492         },
 493         {
 494                 SLAPI_PLUGIN_PRE_UNBIND_FN, /* UNBIND */
 495                 SLAPI_PLUGIN_POST_UNBIND_FN,
 496                 NULL,
 497                 NULL,
 498                 NULL,
 499                 NULL
 500         },
 501         {
 502                 SLAPI_PLUGIN_PRE_SEARCH_FN,
 503                 SLAPI_PLUGIN_POST_SEARCH_FN,
 504                 slapi_op_search_init,
 505                 slapi_op_search_callback,
 506                 NULL,
 507                 slapi_op_search_cleanup
 508         },
 509         {
 510                 SLAPI_PLUGIN_PRE_COMPARE_FN,
 511                 SLAPI_PLUGIN_POST_COMPARE_FN,
 512                 slapi_op_compare_init,
 513                 NULL,
 514                 NULL,
 515                 NULL
 516         },
 517         {
 518                 SLAPI_PLUGIN_PRE_MODIFY_FN,
 519                 SLAPI_PLUGIN_POST_MODIFY_FN,
 520                 slapi_op_modify_init,
 521                 slapi_op_modify_callback,
 522                 NULL,
 523                 slapi_op_modify_cleanup
 524         },
 525         {
 526                 SLAPI_PLUGIN_PRE_MODRDN_FN,
 527                 SLAPI_PLUGIN_POST_MODRDN_FN,
 528                 slapi_op_modrdn_init,
 529                 NULL,
 530                 NULL,
 531                 NULL
 532         },
 533         {
 534                 SLAPI_PLUGIN_PRE_ADD_FN,
 535                 SLAPI_PLUGIN_POST_ADD_FN,
 536                 slapi_op_add_init,
 537                 NULL,
 538                 NULL,
 539                 NULL
 540         },
 541         {
 542                 SLAPI_PLUGIN_PRE_DELETE_FN,
 543                 SLAPI_PLUGIN_POST_DELETE_FN,
 544                 NULL,
 545                 NULL,
 546                 NULL,
 547                 NULL
 548         },
 549         {
 550                 SLAPI_PLUGIN_PRE_ABANDON_FN,
 551                 SLAPI_PLUGIN_POST_ABANDON_FN,
 552                 NULL,
 553                 NULL,
 554                 NULL,
 555                 NULL
 556         },
 557         {
 558                 0,
 559                 0,
 560                 NULL,
 561                 NULL,
 562                 NULL,
 563                 NULL
 564         }
 565 };
 566
 567 slap_operation_t
 568 slapi_tag2op( ber_tag_t tag )
 569 {
 570         slap_operation_t op;
 571
 572         switch ( tag ) {
 573         case LDAP_REQ_BIND:
 574                 op = op_bind;
 575                 break;
 576         case LDAP_REQ_ADD:
 577                 op = op_add;
 578                 break;
 579         case LDAP_REQ_DELETE:
 580                 op = op_compare;
 581                 break;
 582         case LDAP_REQ_MODRDN:
 583                 op = op_modrdn;
 584                 break;
 585         case LDAP_REQ_MODIFY:
 586                 op = op_modify;
 587                 break;
 588         case LDAP_REQ_COMPARE:
 589                 op = op_compare;
 590                 break;
 591         case LDAP_REQ_SEARCH:
 592                 op = op_search;
 593                 break;
 594         case LDAP_REQ_UNBIND:
 595                 op = op_unbind;
 596                 break;
 597         default:
 598                 op = op_last;
 599                 break;
 600         }
 601
 602         return op;
 603 }
 604
 605 static int
 606 slapi_over_response( Operation *op, SlapReply *rs )
 607 {
 608         int                     rc;
 609
 610         switch ( rs->sr_type ) {
 611         case REP_RESULT:
 612                 rc = slapi_over_result( op, rs, SLAPI_PLUGIN_PRE_RESULT_FN );
 613                 break;
 614         case REP_SEARCH:
 615                 rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_ENTRY_FN );
 616                 break;
 617         case REP_SEARCHREF:
 618                 rc = slapi_over_search( op, rs, SLAPI_PLUGIN_PRE_REFERRAL_FN );
 619                 break;
 620         default:
 621                 rc = SLAP_CB_CONTINUE;
 622                 break;
 623         }
 624
 625         return rc;
 626 }
 627
 628 static int
 629 slapi_over_cleanup( Operation *op, SlapReply *rs )
 630 {
 631         int                     rc;
 632
 633         switch ( rs->sr_type ) {
 634         case REP_RESULT:
 635                 rc = slapi_over_result( op, rs, SLAPI_PLUGIN_POST_RESULT_FN );
 636                 break;
 637         case REP_SEARCH:
 638                 rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_ENTRY_FN );
 639                 break;
 640         case REP_SEARCHREF:
 641                 rc = slapi_over_search( op, rs, SLAPI_PLUGIN_POST_REFERRAL_FN );
 642                 break;
 643         default:
 644                 rc = SLAP_CB_CONTINUE;
 645                 break;
 646         }
 647
 648         return rc;
 649 }
 650
 651 static int
 652 slapi_op_func( Operation *op, SlapReply *rs )
 653 {
 654         Slapi_PBlock            *pb;
 655         slap_operation_t        which;
 656         struct slapi_op_info    *opinfo;
 657         int                     rc, flags = 0;
 658         slap_overinfo           *oi;
 659         slap_overinst           *on;
 660         slap_callback           cb;
 661
 662         pb = SLAPI_OPERATION_PBLOCK( op );
 663
 664         /*
 665          * We check for op->o_extensions to verify that we are not
 666          * processing a SLAPI internal operation. XXX
 667          */
 668         if ( pb == NULL || op->o_hdr->oh_extensions == NULL ) {
 669                 return SLAP_CB_CONTINUE;
 670         }
 671
 672         /*
 673          * Find the SLAPI operation information for this LDAP
 674          * operation; this will contain the preop and postop
 675          * plugin types, as well as optional callbacks for
 676          * setting up the SLAPI environment.
 677          */
 678         which = slapi_tag2op( op->o_tag );
 679         if ( which >= op_last ) {
 680                 /* invalid operation, but let someone else deal with it */
 681                 return SLAP_CB_CONTINUE;
 682         }
 683
 684         opinfo = &slapi_op_dispatch_table[which];
 685         if ( opinfo == NULL || opinfo->soi_preop == 0 ) {
 686                 /* no SLAPI plugin types for this operation */
 687                 return SLAP_CB_CONTINUE;
 688         }
 689
 690         slapi_int_pblock_set_operation( pb, op );
 691
 692         cb.sc_response = slapi_over_response; /* call pre-entry/result plugins */
 693         cb.sc_cleanup = slapi_over_cleanup;  /* call post-entry/result plugins */
 694         cb.sc_private = opinfo;
 695         cb.sc_next = op->o_callback;
 696         op->o_callback = &cb;
 697
 698         /*
 699          * Call preoperation plugins
 700          */
 701         if ( opinfo->soi_preop_init != NULL ) {
 702                 rs->sr_err = (opinfo->soi_preop_init)( op, rs, pb );
 703                 if ( rs->sr_err != LDAP_SUCCESS )
 704                         return rs->sr_err;
 705         }
 706
 707         rs->sr_err = slapi_int_call_plugins( op->o_bd, opinfo->soi_preop, pb );
 708
 709         /*
 710          * soi_callback is responsible for examining the result code
 711          * of the preoperation plugin and determining whether to
 712          * abort. This is needed because of special SLAPI behaviour
 713          * with bind preoperation plugins.
 714          *
 715          * The soi_callback function is also used to reset any values
 716          * returned from the preoperation plugin before calling the
 717          * backend (for the success case).
 718          */
 719         if ( opinfo->soi_callback == NULL ) {
 720                 /* default behaviour is preop plugin can abort operation */
 721                 if ( rs->sr_err < 0 ) {
 722                         slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void **)&rs->sr_err );
 723                         goto cleanup;
 724                 }
 725         } else {
 726                 rc = (opinfo->soi_callback)( op, rs, pb );
 727                 if ( rc )
 728                         goto cleanup;
 729         }
 730
 731         /*
 732          * Call actual backend (or next overlay in stack)
 733          */
 734         on = (slap_overinst *)op->o_bd->bd_info;
 735         oi = on->on_info;
 736
 737         rs->sr_err = overlay_op_walk( op, rs, which, oi, on->on_next );
 738
 739         /*
 740          * Call postoperation plugins
 741          */
 742         slapi_pblock_set( pb, SLAPI_RESULT_CODE, (void *)rs->sr_err );
 743
 744         if ( opinfo->soi_postop_init != NULL ) {
 745                 (opinfo->soi_postop_init)( op, rs, pb );
 746         }
 747
 748         slapi_int_call_plugins( op->o_bd, opinfo->soi_postop, pb );
 749
 750 cleanup:
 751         if ( opinfo->soi_cleanup != NULL ) {
 752                 (opinfo->soi_cleanup)( op, rs, pb );
 753         }
 754
 755         op->o_callback = cb.sc_next;
 756
 757         return rs->sr_err;
 758 }
 759
 760 static int
 761 slapi_over_extended( Operation *op, SlapReply *rs )
 762 {
 763         Slapi_PBlock    *pb;
 764         SLAPI_FUNC      callback;
 765         int             sentResult = 0;
 766         int             rc;
 767         struct berval   reqdata = BER_BVNULL;
 768
 769         pb = SLAPI_OPERATION_PBLOCK( op );
 770         if ( pb == NULL ) {
 771                 return SLAP_CB_CONTINUE;
 772         }
 773
 774         slapi_int_get_extop_plugin( &op->ore_reqoid, &callback );
 775         if ( callback == NULL ) {
 776                 return SLAP_CB_CONTINUE;
 777         }
 778
 779         slapi_int_pblock_set_operation( pb, op );
 780
 781         if ( op->ore_reqdata != NULL ) {
 782                 reqdata = *op->ore_reqdata;
 783         }
 784
 785         slapi_pblock_set( pb, SLAPI_EXT_OP_REQ_OID,   (void *)op->ore_reqoid.bv_val);
 786         slapi_pblock_set( pb, SLAPI_EXT_OP_REQ_VALUE, (void *)&reqdata);
 787
 788         rc = (*callback)( pb );
 789         if ( rc == SLAPI_PLUGIN_EXTENDED_SENT_RESULT ) {
 790                 return rc;
 791         } else if ( rc == SLAPI_PLUGIN_EXTENDED_NOT_HANDLED ) {
 792                 return SLAP_CB_CONTINUE;
 793         }
 794
 795         slapi_pblock_get( pb, SLAPI_EXT_OP_RET_OID,   (void **)&rs->sr_rspoid );
 796         slapi_pblock_get( pb, SLAPI_EXT_OP_RET_VALUE, (void **)&rs->sr_rspdata );
 797
 798         rs->sr_err = rc;
 799         send_ldap_extended( op, rs );
 800
 801         if ( rs->sr_rspoid != NULL )
 802                 slapi_ch_free_string( (char **)&rs->sr_rspoid );
 803
 804         if ( rs->sr_rspdata != NULL )
 805                 ber_bvfree( rs->sr_rspdata );
 806
 807         return rs->sr_err;
 808 }
 809
 810 static int
 811 slapi_over_access_allowed(
 812         Operation               *op,
 813         Entry                   *e,
 814         AttributeDescription    *desc,
 815         struct berval           *val,
 816         slap_access_t           access,
 817         AccessControlState      *state,
 818         slap_mask_t             *maskp )
 819 {
 820         int rc;
 821
 822         rc = slapi_int_access_allowed( op, e, desc, val, access, state );
 823         if ( rc != 0 )
 824                 rc = SLAP_CB_CONTINUE;
 825
 826         return rc;
 827 }
 828
 829 static int
 830 slapi_over_acl_group(
 831         Operation               *op,
 832         Entry                   *target,
 833         struct berval           *gr_ndn,
 834         struct berval           *op_ndn,
 835         ObjectClass             *group_oc,
 836         AttributeDescription    *group_at )
 837 {
 838         Slapi_Entry             *e;
 839         int                     rc;
 840         Slapi_PBlock            *pb = SLAPI_OPERATION_PBLOCK( op );
 841         BackendDB               *be = NULL;
 842         BackendDB               *be_orig = op->o_bd;
 843
 844         if ( pb == NULL ) {
 845                 return SLAP_CB_CONTINUE;
 846         }
 847
 848         if ( target != NULL && dn_match( &target->e_nname, gr_ndn ) ) {
 849                 e = target;
 850                 rc = 0;
 851         } else {
 852                 be = select_backend( gr_ndn, 0, 0 );
 853                 if ( be == NULL ) {
 854                         rc = LDAP_NO_SUCH_OBJECT;
 855                 } else {
 856                         op->o_bd = be;
 857                         rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
 858                         op->o_bd = be_orig;
 859                 }
 860         }
 861
 862         if ( rc ) {
 863                 return SLAP_CB_CONTINUE;
 864         }
 865
 866         slapi_pblock_set( pb, SLAPI_X_GROUP_ENTRY,        (void *)e );
 867         slapi_pblock_set( pb, SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
 868         slapi_pblock_set( pb, SLAPI_X_GROUP_ATTRIBUTE,    (void *)group_at->ad_cname.bv_val );
 869         slapi_pblock_set( pb, SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
 870
 871         rc = slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_PRE_GROUP_FN, pb );
 872         if ( rc == 0 )
 873                 rc = SLAP_CB_CONTINUE;
 874         else
 875                 slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void **)&rc );
 876
 877         slapi_pblock_set( pb, SLAPI_X_GROUP_ENTRY,         NULL );
 878         slapi_pblock_set( pb, SLAPI_X_GROUP_OPERATION_DN,  NULL );
 879         slapi_pblock_set( pb, SLAPI_X_GROUP_ATTRIBUTE,     NULL );
 880         slapi_pblock_set( pb, SLAPI_X_GROUP_TARGET_ENTRY,  NULL );
 881
 882         if ( e != target ) {
 883                 op->o_bd = be;
 884                 be_entry_release_r( op, e );
 885                 op->o_bd = be_orig;
 886         }
 887
 888         /*
 889          * XXX don't call POST_GROUP_FN, I have no idea what the point of
 890          * that plugin function was anyway
 891          */
 892         return rc;
 893 }
 894
 895 int
 896 slapi_int_overlay_init()
 897 {
 898         memset( &slapi, 0, sizeof(slapi) );
 899
 900         slapi.on_bi.bi_type = SLAPI_OVERLAY_NAME;
 901
 902         slapi.on_bi.bi_op_bind = slapi_op_func;
 903         slapi.on_bi.bi_op_unbind = slapi_op_func;
 904         slapi.on_bi.bi_op_search = slapi_op_func;
 905         slapi.on_bi.bi_op_compare = slapi_op_func;
 906         slapi.on_bi.bi_op_modify = slapi_op_func;
 907         slapi.on_bi.bi_op_modrdn = slapi_op_func;
 908         slapi.on_bi.bi_op_add = slapi_op_func;
 909         slapi.on_bi.bi_op_delete = slapi_op_func;
 910         slapi.on_bi.bi_op_abandon = slapi_op_func;
 911         slapi.on_bi.bi_op_cancel = slapi_op_func;
 912
 913         slapi.on_bi.bi_extended = slapi_over_extended;
 914         slapi.on_bi.bi_access_allowed = slapi_over_access_allowed;
 915         slapi.on_bi.bi_operational = slapi_over_aux_operational;
 916         slapi.on_bi.bi_acl_group = slapi_over_acl_group;
 917
 918         return overlay_register( &slapi );
 919 }
 920
 921 #endif /* LDAP_SLAPI */