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