3 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
6 /* backend.c - routines for dealing with back-end databases */
13 #include <ac/string.h>
14 #include <ac/socket.h>
22 #include "back-bdb/external.h"
25 #include "back-dnssrv/external.h"
28 #include "back-ldap/external.h"
31 #include "back-ldbm/external.h"
34 #include "back-passwd/external.h"
37 #include "back-perl/external.h"
40 #include "back-shell/external.h"
43 #include "back-tcl/external.h"
46 #include "back-sql/external.h"
49 #include "private/external.h"
52 static BackendInfo binfo[] = {
53 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
54 {"bdb", bdb_back_initialize},
56 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
57 {"dnssrv", dnssrv_back_initialize},
59 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
60 {"ldap", ldap_back_initialize},
62 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
63 {"ldbm", ldbm_back_initialize},
65 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
66 {"passwd", passwd_back_initialize},
68 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
69 {"perl", perl_back_initialize},
71 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
72 {"shell", shell_back_initialize},
74 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
75 {"tcl", tcl_back_initialize},
77 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
78 {"sql", sql_back_initialize},
80 /* for any private backend */
81 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
82 {"private", private_back_initialize},
88 BackendInfo *backendInfo = NULL;
91 BackendDB *backendDB = NULL;
93 int backend_init(void)
97 if((nBackendInfo != 0) || (backendInfo != NULL)) {
98 /* already initialized */
99 Debug( LDAP_DEBUG_ANY,
100 "backend_init: already initialized.\n", 0, 0, 0 );
105 binfo[nBackendInfo].bi_type != NULL;
108 rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
111 Debug( LDAP_DEBUG_ANY,
112 "backend_init: initialized for type \"%s\"\n",
113 binfo[nBackendInfo].bi_type, 0, 0 );
115 /* destroy those we've already inited */
120 if ( binfo[nBackendInfo].bi_destroy ) {
121 binfo[nBackendInfo].bi_destroy(
122 &binfo[nBackendInfo] );
129 if ( nBackendInfo > 0) {
137 Debug( LDAP_DEBUG_ANY,
138 "backend_init: failed\n",
142 #endif /* SLAPD_MODULES */
145 int backend_add(BackendInfo *aBackendInfo)
149 if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
150 Debug( LDAP_DEBUG_ANY,
151 "backend_add: initialization for type \"%s\" failed\n",
152 aBackendInfo->bi_type, 0, 0 );
156 /* now add the backend type to the Backend Info List */
158 BackendInfo *newBackendInfo = 0;
160 /* if backendInfo == binfo no deallocation of old backendInfo */
161 if (backendInfo == binfo) {
162 newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
163 AC_MEMCPY(newBackendInfo, backendInfo, sizeof(BackendInfo) *
166 newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) *
169 AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
170 sizeof(BackendInfo));
171 backendInfo = newBackendInfo;
178 int backend_startup(Backend *be)
183 if( ! ( nBackendDB > 0 ) ) {
185 Debug( LDAP_DEBUG_ANY,
186 "backend_startup: %d databases to startup.\n",
192 /* startup a specific backend database */
193 Debug( LDAP_DEBUG_TRACE,
194 "backend_startup: starting database\n",
197 if ( be->bd_info->bi_open ) {
198 rc = be->bd_info->bi_open( be->bd_info );
202 Debug( LDAP_DEBUG_ANY,
203 "backend_startup: bi_open failed!\n",
208 if ( be->bd_info->bi_db_open ) {
209 rc = be->bd_info->bi_db_open( be );
213 Debug( LDAP_DEBUG_ANY,
214 "backend_startup: bi_db_open failed!\n",
222 /* open each backend type */
223 for( i = 0; i < nBackendInfo; i++ ) {
224 if( backendInfo[i].bi_nDB == 0) {
225 /* no database of this type, don't open */
229 if( backendInfo[i].bi_open ) {
230 rc = backendInfo[i].bi_open(
235 Debug( LDAP_DEBUG_ANY,
236 "backend_startup: bi_open %d failed!\n",
242 /* open each backend database */
243 for( i = 0; i < nBackendDB; i++ ) {
244 /* append global access controls */
245 acl_append( &backendDB[i].be_acl, global_acl );
247 if ( backendDB[i].bd_info->bi_db_open ) {
248 rc = backendDB[i].bd_info->bi_db_open(
253 Debug( LDAP_DEBUG_ANY,
254 "backend_startup: bi_db_open %d failed!\n",
263 int backend_num( Backend *be )
267 if( be == NULL ) return -1;
269 for( i = 0; i < nBackendDB; i++ ) {
270 if( be == &backendDB[i] ) return i;
275 int backend_shutdown( Backend *be )
281 /* shutdown a specific backend database */
283 if ( be->bd_info->bi_nDB == 0 ) {
284 /* no database of this type, we never opened it */
288 if ( be->bd_info->bi_db_close ) {
289 be->bd_info->bi_db_close( be );
292 if( be->bd_info->bi_close ) {
293 be->bd_info->bi_close( be->bd_info );
299 /* close each backend database */
300 for( i = 0; i < nBackendDB; i++ ) {
301 if ( backendDB[i].bd_info->bi_db_close ) {
302 backendDB[i].bd_info->bi_db_close(
307 Debug( LDAP_DEBUG_ANY,
308 "backend_close: bi_close %s failed!\n",
309 backendDB[i].be_type, 0, 0 );
313 /* close each backend type */
314 for( i = 0; i < nBackendInfo; i++ ) {
315 if( backendInfo[i].bi_nDB == 0 ) {
316 /* no database of this type */
320 if( backendInfo[i].bi_close ) {
321 backendInfo[i].bi_close(
329 int backend_destroy(void)
333 /* destroy each backend database */
334 for( i = 0; i < nBackendDB; i++ ) {
335 if ( backendDB[i].bd_info->bi_db_destroy ) {
336 backendDB[i].bd_info->bi_db_destroy(
341 /* destroy each backend type */
342 for( i = 0; i < nBackendInfo; i++ ) {
343 if( backendInfo[i].bi_destroy ) {
344 backendInfo[i].bi_destroy(
350 if (backendInfo != binfo) {
353 #endif /* SLAPD_MODULES */
361 BackendInfo* backend_info(const char *type)
365 /* search for the backend type */
366 for( i = 0; i < nBackendInfo; i++ ) {
367 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
368 return &backendInfo[i];
382 BackendInfo *bi = backend_info(type);
386 fprintf( stderr, "Unrecognized database type (%s)\n", type );
390 backendDB = (BackendDB *) ch_realloc(
392 (nBackendDB + 1) * sizeof(Backend) );
394 memset( &backendDB[nbackends], '\0', sizeof(Backend) );
396 be = &backends[nbackends++];
399 be->be_sizelimit = defsize;
400 be->be_timelimit = deftime;
401 be->be_dfltaccess = global_default_access;
403 be->be_restrictops = global_restrictops;
404 be->be_requires = global_requires;
406 /* assign a default depth limit for alias deref */
407 be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
410 rc = bi->bi_db_init( be );
414 fprintf( stderr, "database init failed (%s)\n", type );
428 for ( i = 0; i < nbackends; i++ ) {
429 if ( backends[i].bd_info->bi_db_close ) {
430 (*backends[i].bd_info->bi_db_close)( &backends[i] );
436 select_backend( const char * dn )
438 int i, j, len, dnlen;
440 dnlen = strlen( dn );
441 for ( i = 0; i < nbackends; i++ ) {
442 for ( j = 0; backends[i].be_nsuffix != NULL &&
443 backends[i].be_nsuffix[j] != NULL; j++ )
445 len = strlen( backends[i].be_nsuffix[j] );
451 if ( strcmp( backends[i].be_nsuffix[j],
452 dn + (dnlen - len) ) == 0 ) {
453 return( &backends[i] );
469 for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i] != NULL; i++ ) {
470 if ( strcmp( be->be_nsuffix[i], suffix ) == 0 ) {
479 be_isroot( Backend *be, const char *ndn )
483 if ( ndn == NULL || *ndn == '\0' ) {
487 if ( be->be_root_ndn == NULL || *be->be_root_ndn == '\0' ) {
491 rc = strcmp( be->be_root_ndn, ndn ) ? 0 : 1;
497 be_root_dn( Backend *be )
499 if ( be->be_root_dn == NULL ) {
503 return be->be_root_dn;
507 be_isroot_pw( Backend *be, const char *ndn, struct berval *cred )
511 if ( ! be_isroot( be, ndn ) ) {
515 if( be->be_root_pw.bv_len == 0 ) {
520 ldap_pvt_thread_mutex_lock( &crypt_mutex );
523 result = lutil_passwd( &be->be_root_pw, cred, NULL );
526 ldap_pvt_thread_mutex_unlock( &crypt_mutex );
533 be_entry_release_rw( Backend *be, Entry *e, int rw )
535 if ( be->be_release ) {
536 /* free and release entry from backend */
537 return be->be_release( be, e, rw );
553 for ( i = 0; i < nbackends; i++ ) {
554 if ( backends[i].be_unbind ) {
555 (*backends[i].be_unbind)( &backends[i], conn, op );
563 backend_connection_init(
569 for ( i = 0; i < nbackends; i++ ) {
570 if ( backends[i].be_connection_init ) {
571 (*backends[i].be_connection_init)( &backends[i], conn);
579 backend_connection_destroy(
585 for ( i = 0; i < nbackends; i++ ) {
586 if ( backends[i].be_connection_destroy ) {
587 (*backends[i].be_connection_destroy)( &backends[i], conn);
595 backend_check_controls(
603 if( ctrls == NULL ) {
607 for( ; *ctrls != NULL ; ctrls++ ) {
608 if( (*ctrls)->ldctl_iscritical &&
609 !charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
611 *text = "control unavailable in NamingContext";
612 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
620 backend_check_restrictions(
628 slap_mask_t restrictops;
629 slap_mask_t requires;
635 rc = backend_check_controls( be, conn, op, text );
637 if( rc != LDAP_SUCCESS ) {
641 restrictops = be->be_restrictops;
642 requires = be->be_requires;
643 ssf = &be->be_ssf_set;
646 restrictops = global_restrictops;
647 requires = global_requires;
648 ssf = &global_ssf_set;
651 switch( op->o_tag ) {
653 opflag = SLAP_RESTRICT_OP_ADD;
657 opflag = SLAP_RESTRICT_OP_BIND;
659 case LDAP_REQ_COMPARE:
660 opflag = SLAP_RESTRICT_OP_COMPARE;
662 case LDAP_REQ_DELETE:
664 opflag = SLAP_RESTRICT_OP_DELETE;
666 case LDAP_REQ_EXTENDED:
667 opflag = SLAP_RESTRICT_OP_EXTENDED;
669 case LDAP_REQ_MODIFY:
671 opflag = SLAP_RESTRICT_OP_MODIFY;
673 case LDAP_REQ_RENAME:
675 opflag = SLAP_RESTRICT_OP_RENAME;
677 case LDAP_REQ_SEARCH:
678 opflag = SLAP_RESTRICT_OP_SEARCH;
680 case LDAP_REQ_UNBIND:
684 *text = "restrict operations internal error";
688 if (( extoid == NULL || strcmp( extoid, LDAP_EXOP_START_TLS ) ) ) {
689 /* these checks don't apply to StartTLS */
691 if( op->o_tag == LDAP_REQ_EXTENDED ) {
692 /* threat other extended operations as update ops */
696 if( op->o_ssf < ssf->sss_ssf ) {
697 *text = "confidentiality required";
698 return LDAP_CONFIDENTIALITY_REQUIRED;
700 if( op->o_transport_ssf < ssf->sss_transport ) {
701 *text = "transport confidentiality required";
702 return LDAP_CONFIDENTIALITY_REQUIRED;
704 if( op->o_tls_ssf < ssf->sss_tls ) {
705 *text = "TLS confidentiality required";
706 return LDAP_CONFIDENTIALITY_REQUIRED;
708 if( op->o_sasl_ssf < ssf->sss_sasl ) {
709 *text = "SASL confidentiality required";
710 return LDAP_CONFIDENTIALITY_REQUIRED;
714 if( op->o_ssf < ssf->sss_update_ssf ) {
715 *text = "update confidentiality required";
716 return LDAP_CONFIDENTIALITY_REQUIRED;
718 if( op->o_transport_ssf < ssf->sss_update_transport ) {
719 *text = "transport update confidentiality required";
720 return LDAP_CONFIDENTIALITY_REQUIRED;
722 if( op->o_tls_ssf < ssf->sss_update_tls ) {
723 *text = "TLS update confidentiality required";
724 return LDAP_CONFIDENTIALITY_REQUIRED;
726 if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
727 *text = "SASL update confidentiality required";
728 return LDAP_CONFIDENTIALITY_REQUIRED;
733 if (( extoid == NULL || strcmp( extoid, LDAP_EXOP_START_TLS ) )
734 || op->o_tag == LDAP_REQ_BIND )
736 /* these checks don't apply to StartTLS or Bind */
738 if( requires & SLAP_REQUIRE_STRONG ) {
739 /* should check mechanism */
740 if( op->o_authmech == NULL ||
741 op->o_dn == NULL || *op->o_dn == '\0' )
743 *text = "strong authentication required";
744 return LDAP_STRONG_AUTH_REQUIRED;
748 if( requires & SLAP_REQUIRE_SASL ) {
749 if( op->o_authmech == NULL ||
750 op->o_dn == NULL || *op->o_dn == '\0' )
752 *text = "SASL authentication required";
753 return LDAP_STRONG_AUTH_REQUIRED;
757 if( requires & SLAP_REQUIRE_AUTHC ) {
758 if( op->o_dn == NULL || *op->o_dn == '\0' ) {
759 *text = "authentication required";
760 return LDAP_UNWILLING_TO_PERFORM;
764 if( requires & SLAP_REQUIRE_BIND ) {
766 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
767 version = conn->c_protocol;
768 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
771 /* no bind has occurred */
772 *text = "BIND required";
773 return LDAP_OPERATIONS_ERROR;
777 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
778 if( op->o_protocol < LDAP_VERSION3 ) {
779 /* no bind has occurred */
780 *text = "operation restricted to LDAPv3 clients";
781 return LDAP_OPERATIONS_ERROR;
786 if( restrictops & opflag ) {
787 if( restrictops == SLAP_RESTRICT_OP_READS ) {
788 *text = "read operations restricted";
790 *text = "operation restricted";
792 return LDAP_UNWILLING_TO_PERFORM;
798 int backend_check_referrals(
805 int rc = LDAP_SUCCESS;
807 if( be->be_chk_referrals ) {
810 rc = be->be_chk_referrals( be,
811 conn, op, dn, ndn, &text );
813 if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
814 send_ldap_result( conn, op, rc,
815 NULL, text, NULL, NULL );
828 ObjectClass *group_oc,
829 AttributeDescription *group_at
832 if( strcmp( target->e_ndn, gr_ndn ) != 0 ) {
833 /* we won't attempt to send it to a different backend */
835 be = select_backend(gr_ndn);
838 return LDAP_NO_SUCH_OBJECT;
843 return be->be_group( be, target, gr_ndn, op_ndn,
844 group_oc, group_at );
847 return LDAP_UNWILLING_TO_PERFORM;
857 AttributeDescription *entry_at,
858 struct berval ***vals
861 if( target == NULL || strcmp( target->e_ndn, e_ndn ) != 0 ) {
862 /* we won't attempt to send it to a different backend */
864 be = select_backend(e_ndn);
867 return LDAP_NO_SUCH_OBJECT;
871 if( be->be_attribute ) {
872 return be->be_attribute( be, conn, op, target, e_ndn,
876 return LDAP_UNWILLING_TO_PERFORM;
879 Attribute *backend_operational(
885 #ifdef SLAPD_SCHEMA_DN
886 a = ch_malloc( sizeof( Attribute ) );
887 a->a_desc = ad_dup( slap_schema.si_ad_subschemaSubentry );
889 /* Should be backend specific */
890 a->a_vals = ch_malloc( 2 * sizeof( struct berval * ) );
891 a->a_vals[0] = ber_bvstrdup( SLAPD_SCHEMA_DN );