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