]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/backend.c
Add a default case with assert() just in case.
[openldap] / servers / slapd / backend.c
index a7a6b2c9f4e890e5c0f48998a723cc918e67aedf..530410362cc165631370bde305185b41f1baa2bd 100644 (file)
@@ -1,6 +1,6 @@
 /* $OpenLDAP$ */
 /*
- * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
  */
 /* backend.c - routines for dealing with back-end databases */
 #include "slap.h"
 #include "lutil.h"
 
-#ifdef SLAPD_LDAP
+/*
+ * If a module is configured as dynamic, its header should not
+ * get included into slapd. While this is a general rule and does
+ * not have much of an effect in UNIX, this rule should be adhered
+ * to for Windows, where dynamic object code should not be implicitly
+ * imported into slapd without appropriate __declspec(dllimport) directives.
+ */
+
+#if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
+#include "back-bdb/external.h"
+#endif
+#if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
+#include "back-dnssrv/external.h"
+#endif
+#if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
 #include "back-ldap/external.h"
 #endif
-#ifdef SLAPD_LDBM
+#if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
 #include "back-ldbm/external.h"
 #endif
-#ifdef SLAPD_BDB2
-#include "back-bdb2/external.h"
+#if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
+#include "back-meta/external.h"
+#endif
+#if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
+#include "back-monitor/external.h"
 #endif
-#ifdef SLAPD_PASSWD
+#if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
 #include "back-passwd/external.h"
 #endif
-#ifdef SLAPD_PERL
+#if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
 #include "back-perl/external.h"
 #endif
-#ifdef SLAPD_SHELL
+#if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
 #include "back-shell/external.h"
 #endif
-#ifdef SLAPD_TCL
+#if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
 #include "back-tcl/external.h"
 #endif
-#ifdef SLAPD_NTDOMAIN
-#include "back-domain/external.h"
+#if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
+#include "back-sql/external.h"
+#endif
+#if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
+#include "private/external.h"
 #endif
 
 static BackendInfo binfo[] = {
+#if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
+       {"bdb", bdb_initialize},
+#endif
+#if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
+       {"dnssrv",      dnssrv_back_initialize},
+#endif
 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
        {"ldap",        ldap_back_initialize},
 #endif
 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
        {"ldbm",        ldbm_back_initialize},
 #endif
-#if defined(SLAPD_BDB2) && !defined(SLAPD_BDB2_DYNAMIC)
-       {"bdb2",        bdb2_back_initialize},
+#if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
+       {"meta",        meta_back_initialize},
+#endif
+#if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
+       {"monitor",     monitor_back_initialize},
 #endif
 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
        {"passwd",      passwd_back_initialize},
@@ -65,8 +94,12 @@ static BackendInfo binfo[] = {
 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
        {"tcl",         tcl_back_initialize},
 #endif
-#if defined(SLAPD_NTDOMAIN) && !defined(SLAPD_NTDOMAIN_DYNAMIC)
-       {"ntdom",       domain_back_initialize},
+#if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
+       {"sql",         sql_back_initialize},
+#endif
+       /* for any private backend */
+#if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
+       {"private",     private_back_initialize},
 #endif
        {NULL}
 };
@@ -83,8 +116,13 @@ int backend_init(void)
 
        if((nBackendInfo != 0) || (backendInfo != NULL)) {
                /* already initialized */
+#ifdef NEW_LOGGING
+               LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
+                          "backend_init:  backend already initialized\n" ));
+#else
                Debug( LDAP_DEBUG_ANY,
                        "backend_init: already initialized.\n", 0, 0, 0 );
+#endif
                return -1;
        }
 
@@ -95,10 +133,15 @@ int backend_init(void)
                rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 
                if(rc != 0) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
+                               "backend_init:  initialized for type \"%s\"\n",
+                               binfo[nBackendInfo].bi_type ));
+#else
                        Debug( LDAP_DEBUG_ANY,
                                "backend_init: initialized for type \"%s\"\n",
-                                       binfo[nBackendInfo].bi_type, 0, 0 );
-
+                               binfo[nBackendInfo].bi_type, 0, 0 );
+#endif
                        /* destroy those we've already inited */
                        for( nBackendInfo--;
                                nBackendInfo >= 0 ;
@@ -121,9 +164,15 @@ int backend_init(void)
 #ifdef SLAPD_MODULES   
        return 0;
 #else
+
+#ifdef NEW_LOGGING
+       LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
+               "backend_init: failed\n" ));
+#else
        Debug( LDAP_DEBUG_ANY,
                "backend_init: failed\n",
                0, 0, 0 );
+#endif
 
        return rc;
 #endif /* SLAPD_MODULES */
@@ -134,9 +183,15 @@ int backend_add(BackendInfo *aBackendInfo)
    int rc = 0;
 
    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
+#ifdef NEW_LOGGING
+       LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
+                  "backend_add:  initialization for type \"%s\" failed\n",
+                  aBackendInfo->bi_type ));
+#else
       Debug( LDAP_DEBUG_ANY,
             "backend_add: initialization for type \"%s\" failed\n",
             aBackendInfo->bi_type, 0, 0 );
+#endif
       return rc;
    }
 
@@ -147,13 +202,13 @@ int backend_add(BackendInfo *aBackendInfo)
       /* if backendInfo == binfo no deallocation of old backendInfo */
       if (backendInfo == binfo) {
         newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
-        memcpy(newBackendInfo, backendInfo, sizeof(BackendInfo) * 
+        AC_MEMCPY(newBackendInfo, backendInfo, sizeof(BackendInfo) * 
                nBackendInfo);
       } else {
         newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) * 
                                     (nBackendInfo + 1));
       }
-      memcpy(&newBackendInfo[nBackendInfo], aBackendInfo, 
+      AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo, 
             sizeof(BackendInfo));
       backendInfo = newBackendInfo;
       nBackendInfo++;
@@ -169,26 +224,44 @@ int backend_startup(Backend *be)
 
        if( ! ( nBackendDB > 0 ) ) {
                /* no databases */
+#ifdef NEW_LOGGING
+               LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
+                          "backend_startup: %d databases to startup. \n",
+                          nBackendDB ));
+#else
                Debug( LDAP_DEBUG_ANY,
                        "backend_startup: %d databases to startup.\n",
                        nBackendDB, 0, 0 );
+#endif
                return 1;
        }
 
        if(be != NULL) {
                /* startup a specific backend database */
+#ifdef NEW_LOGGING
+               LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
+                          "backend_startup:  starting \"%s\"\n",
+                          be->be_suffix[0]->bv_val ));
+#else
                Debug( LDAP_DEBUG_TRACE,
-                       "backend_startup: starting database\n",
-                       0, 0, 0 );
+                       "backend_startup: starting \"%s\"\n",
+                       be->be_suffix[0]->bv_val, 0, 0 );
+#endif
 
                if ( be->bd_info->bi_open ) {
                        rc = be->bd_info->bi_open( be->bd_info );
                }
 
                if(rc != 0) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
+                                  "backend_startup: bi_open failed!\n" ));
+#else
                        Debug( LDAP_DEBUG_ANY,
                                "backend_startup: bi_open failed!\n",
                                0, 0, 0 );
+#endif
+
                        return rc;
                }
 
@@ -197,9 +270,14 @@ int backend_startup(Backend *be)
                }
 
                if(rc != 0) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
+                                  "backend_startup: bi_db_open failed!\n" ));
+#else
                        Debug( LDAP_DEBUG_ANY,
                                "backend_startup: bi_db_open failed!\n",
                                0, 0, 0 );
+#endif
                        return rc;
                }
 
@@ -219,9 +297,14 @@ int backend_startup(Backend *be)
                }
 
                if(rc != 0) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
+                                  "backend_startup: bi_open %d failed!\n", i ));
+#else
                        Debug( LDAP_DEBUG_ANY,
                                "backend_startup: bi_open %d failed!\n",
                                i, 0, 0 );
+#endif
                        return rc;
                }
        }
@@ -237,9 +320,14 @@ int backend_startup(Backend *be)
                }
 
                if(rc != 0) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
+                                  "backend_startup: bi_db_open %d failed!\n", i ));
+#else
                        Debug( LDAP_DEBUG_ANY,
                                "backend_startup: bi_db_open %d failed!\n",
                                i, 0, 0 );
+#endif
                        return rc;
                }
        }
@@ -291,9 +379,15 @@ int backend_shutdown( Backend *be )
                }
 
                if(rc != 0) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG(( "backend", LDAP_LEVEL_NOTICE,
+                                  "backend_shutdown: bi_close %s failed!\n",
+                                  backendDB[i].be_type ));
+#else
                        Debug( LDAP_DEBUG_ANY,
                                "backend_close: bi_close %s failed!\n",
                                backendDB[i].be_type, 0, 0 );
+#endif
                }
        }
 
@@ -316,14 +410,21 @@ int backend_shutdown( Backend *be )
 int backend_destroy(void)
 {
        int i;
+       BackendDB *bd;
 
        /* destroy each backend database */
-       for( i = 0; i < nBackendDB; i++ ) {
-               if ( backendDB[i].bd_info->bi_db_destroy ) {
-                       backendDB[i].bd_info->bi_db_destroy(
-                               &backendDB[i] );
+       for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
+               if ( bd->bd_info->bi_db_destroy ) {
+                       bd->bd_info->bi_db_destroy( bd );
                }
+               ber_bvecfree( bd->be_suffix );
+               ber_bvecfree( bd->be_nsuffix );
+               if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
+               if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
+               if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
+               acl_destroy( bd->be_acl, global_acl );
        }
+       free( backendDB );
 
        /* destroy each backend type */
        for( i = 0; i < nBackendInfo; i++ ) {
@@ -383,16 +484,15 @@ backend_db_init(
        be = &backends[nbackends++];
 
        be->bd_info = bi;
-       be->be_sizelimit = defsize;
-       be->be_timelimit = deftime;
+       be->be_def_limit = deflimit;
        be->be_dfltaccess = global_default_access;
 
+       be->be_restrictops = global_restrictops;
+       be->be_requires = global_requires;
+
        /* assign a default depth limit for alias deref */
        be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH; 
 
-       be->be_realm = global_realm != NULL
-               ? ch_strdup( global_realm ) : NULL;
-
        if(bi->bi_db_init) {
                rc = bi->bi_db_init( be );
        }
@@ -420,43 +520,58 @@ be_db_close( void )
 }
 
 Backend *
-select_backend( const char * dn )
+select_backend(
+       struct berval * dn,
+       int manageDSAit,
+       int noSubs )
 {
-       int     i, j, len, dnlen;
+       int     i, j;
+       ber_len_t len, dnlen = dn->bv_len;
+       Backend *be = NULL;
 
-       dnlen = strlen( dn );
        for ( i = 0; i < nbackends; i++ ) {
                for ( j = 0; backends[i].be_nsuffix != NULL &&
                    backends[i].be_nsuffix[j] != NULL; j++ )
                {
-                       len = strlen( backends[i].be_nsuffix[j] );
+                       if (( backends[i].be_flags & SLAP_BFLAG_GLUE_SUBORDINATE )
+                               && noSubs )
+                       {
+                               continue;
+                       }
+
+                       len = backends[i].be_nsuffix[j]->bv_len;
 
                        if ( len > dnlen ) {
+                               /* suffix is longer than DN */
+                               continue;
+                       }
+                       
+                       if ( len && len < dnlen &&
+                               ( !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ) ||
+                                       DN_ESCAPE( dn->bv_val[(dnlen-len)-2] ) ) )
+                       {
+                               /* make sure we have a separator */
                                continue;
                        }
 
-                       if ( strcmp( backends[i].be_nsuffix[j],
-                           dn + (dnlen - len) ) == 0 ) {
-                               return( &backends[i] );
+                       if ( strcmp( backends[i].be_nsuffix[j]->bv_val,
+                               &dn->bv_val[dnlen-len] ) == 0 )
+                       {
+                               if( be == NULL ) {
+                                       be = &backends[i];
+
+                                       if( manageDSAit && len == dnlen ) {
+                                               continue;
+                                       }
+                               } else {
+                                       be = &backends[i];
+                               }
+                               return be;
                        }
                }
        }
 
-#ifdef LDAP_ALLOW_NULL_SEARCH_BASE
-       /* Add greg@greg.rim.or.jp
-        * It's quick hack for cheap client
-        * Some browser offer a NULL base at ldap_search
-        *
-        * Should only be used as a last resort. -Kdz
-        */
-       if(dnlen == 0) {
-               Debug( LDAP_DEBUG_TRACE,
-                       "select_backend: use default backend\n", 0, 0, 0 );
-               return( &backends[0] );
-       }
-#endif /* LDAP_ALLOW_NULL_SEARCH_BASE */
-
-       return( NULL );
+       return be;
 }
 
 int
@@ -466,9 +581,13 @@ be_issuffix(
 )
 {
        int     i;
+       size_t len = strlen(suffix);
 
        for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i] != NULL; i++ ) {
-               if ( strcmp( be->be_nsuffix[i], suffix ) == 0 ) {
+               if ( len != be->be_nsuffix[i]->bv_len ) {
+                       continue;
+               }
+               if ( strcmp( be->be_nsuffix[i]->bv_val, suffix ) == 0 ) {
                        return( 1 );
                }
        }
@@ -477,57 +596,85 @@ be_issuffix(
 }
 
 int
-be_isroot( Backend *be, const char *ndn )
+be_isroot( Backend *be, struct berval *ndn )
 {
-       int rc;
-
-       if ( ndn == NULL || be->be_root_ndn == NULL ) {
+       if ( !ndn->bv_len ) {
                return( 0 );
        }
 
-       rc = strcmp( be->be_root_ndn, ndn ) ? 0 : 1;
+       if ( !be->be_rootndn.bv_len ) {
+               return( 0 );
+       }
 
-       return(rc);
+       return dn_match( &be->be_rootndn, ndn );
 }
 
-char *
-be_root_dn( Backend *be )
+int
+be_isupdate( Backend *be, struct berval *ndn )
 {
-       if ( be->be_root_dn == NULL ) {
-               return( "" );
+       if ( !ndn->bv_len ) {
+               return( 0 );
+       }
+
+       if ( !be->be_update_ndn.bv_len ) {
+               return( 0 );
        }
 
-       return be->be_root_dn;
+       return dn_match( &be->be_update_ndn, ndn );
+}
+
+struct berval *
+be_root_dn( Backend *be )
+{
+       return &be->be_rootdn;
 }
 
 int
-be_isroot_pw( Backend *be, const char *ndn, struct berval *cred )
+be_isroot_pw( Backend *be,
+       Connection *conn,
+       struct berval *ndn,
+       struct berval *cred )
 {
        int result;
 
        if ( ! be_isroot( be, ndn ) ) {
-               return( 0 );
+               return 0;
+       }
+
+       if( be->be_rootpw.bv_len == 0 ) {
+               return 0;
        }
 
-#ifdef SLAPD_CRYPT
-       ldap_pvt_thread_mutex_lock( &crypt_mutex );
+#if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
+       ldap_pvt_thread_mutex_lock( &passwd_mutex );
+#ifdef SLAPD_SPASSWD
+       lutil_passwd_sasl_conn = conn->c_sasl_context;
+#endif
 #endif
 
-       result = lutil_passwd( cred->bv_val, be->be_root_pw, NULL );
+       result = lutil_passwd( &be->be_rootpw, cred, NULL );
 
-#ifdef SLAPD_CRYPT
-       ldap_pvt_thread_mutex_unlock( &crypt_mutex );
+#if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
+#ifdef SLAPD_SPASSWD
+       lutil_passwd_sasl_conn = NULL;
+#endif
+       ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 #endif
 
        return result == 0;
 }
 
 int
-be_entry_release_rw( Backend *be, Entry *e, int rw )
+be_entry_release_rw(
+       BackendDB *be,
+       Connection *conn,
+       Operation *op,
+       Entry *e,
+       int rw )
 {
        if ( be->be_release ) {
                /* free and release entry from backend */
-               return be->be_release( be, e, rw );
+               return be->be_release( be, conn, op, e, rw );
        } else {
                /* free entry */
                entry_free( e );
@@ -584,38 +731,371 @@ backend_connection_destroy(
        return 0;
 }
 
+static int
+backend_check_controls(
+       Backend *be,
+       Connection *conn,
+       Operation *op,
+       const char **text )
+{
+       LDAPControl **ctrls;
+       ctrls = op->o_ctrls;
+       if( ctrls == NULL ) {
+               return LDAP_SUCCESS;
+       }
+
+       for( ; *ctrls != NULL ; ctrls++ ) {
+               if( (*ctrls)->ldctl_iscritical &&
+                       !charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
+               {
+                       *text = "control unavailable in NamingContext";
+                       return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+               }
+       }
+
+       return LDAP_SUCCESS;
+}
+
+int
+backend_check_restrictions(
+       Backend *be,
+       Connection *conn,
+       Operation *op,
+       const void *opdata,
+       const char **text )
+{
+       int rc;
+       slap_mask_t restrictops;
+       slap_mask_t requires;
+       slap_mask_t opflag;
+       slap_ssf_set_t *ssf;
+       int updateop = 0;
+
+       if( be ) {
+               rc = backend_check_controls( be, conn, op, text );
+
+               if( rc != LDAP_SUCCESS ) {
+                       return rc;
+               }
+
+               restrictops = be->be_restrictops;
+               requires = be->be_requires;
+               ssf = &be->be_ssf_set;
+
+       } else {
+               restrictops = global_restrictops;
+               requires = global_requires;
+               ssf = &global_ssf_set;
+       }
+
+       switch( op->o_tag ) {
+       case LDAP_REQ_ADD:
+               opflag = SLAP_RESTRICT_OP_ADD;
+               updateop++;
+               break;
+       case LDAP_REQ_BIND:
+               opflag = SLAP_RESTRICT_OP_BIND;
+               break;
+       case LDAP_REQ_COMPARE:
+               opflag = SLAP_RESTRICT_OP_COMPARE;
+               break;
+       case LDAP_REQ_DELETE:
+               updateop++;
+               opflag = SLAP_RESTRICT_OP_DELETE;
+               break;
+       case LDAP_REQ_EXTENDED:
+               opflag = SLAP_RESTRICT_OP_EXTENDED;
+               break;
+       case LDAP_REQ_MODIFY:
+               updateop++;
+               opflag = SLAP_RESTRICT_OP_MODIFY;
+               break;
+       case LDAP_REQ_RENAME:
+               updateop++;
+               opflag = SLAP_RESTRICT_OP_RENAME;
+               break;
+       case LDAP_REQ_SEARCH:
+               opflag = SLAP_RESTRICT_OP_SEARCH;
+               break;
+       case LDAP_REQ_UNBIND:
+               opflag = 0;
+               break;
+       default:
+               *text = "restrict operations internal error";
+               return LDAP_OTHER;
+       }
+
+       if ( op->o_tag != LDAP_REQ_EXTENDED
+               || strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) )
+       {
+               /* these checks don't apply to StartTLS */
+
+               if( op->o_tag == LDAP_REQ_EXTENDED ) {
+                       /* threat other extended operations as update ops */
+                       updateop++;
+               }
+
+               if( op->o_transport_ssf < ssf->sss_transport ) {
+                       *text = "transport confidentiality required";
+                       return LDAP_CONFIDENTIALITY_REQUIRED;
+               }
+
+               if( op->o_tls_ssf < ssf->sss_tls ) {
+                       *text = "TLS confidentiality required";
+                       return LDAP_CONFIDENTIALITY_REQUIRED;
+               }
+
+               if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
+                       /* these checks don't apply to SASL bind */
+
+                       if( op->o_sasl_ssf < ssf->sss_sasl ) {
+                               *text = "SASL confidentiality required";
+                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                       }
+
+                       if( op->o_ssf < ssf->sss_ssf ) {
+                               *text = "confidentiality required";
+                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                       }
+               }
+
+               if( updateop ) {
+                       if( op->o_transport_ssf < ssf->sss_update_transport ) {
+                               *text = "transport update confidentiality required";
+                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                       }
+
+                       if( op->o_tls_ssf < ssf->sss_update_tls ) {
+                               *text = "TLS update confidentiality required";
+                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                       }
+
+                       if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
+                               *text = "SASL update confidentiality required";
+                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                       }
+
+                       if( op->o_ssf < ssf->sss_update_ssf ) {
+                               *text = "update confidentiality required";
+                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                       }
+
+                       if( op->o_ndn.bv_len == 0 ) {
+                               *text = "modifications require authentication";
+                               return LDAP_OPERATIONS_ERROR;
+                       }
+               }
+       }
+
+       if ( op->o_tag != LDAP_REQ_BIND && ( op->o_tag != LDAP_REQ_EXTENDED ||
+               strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) ) )
+       {
+               /* these checks don't apply to Bind or StartTLS */
+
+               if( requires & SLAP_REQUIRE_STRONG ) {
+                       /* should check mechanism */
+                       if( op->o_authmech == NULL || op->o_dn.bv_len == 0 )
+                       {
+                               *text = "strong authentication required";
+                               return LDAP_STRONG_AUTH_REQUIRED;
+                       }
+               }
+
+               if( requires & SLAP_REQUIRE_SASL ) {
+                       if( op->o_authmech == NULL || op->o_dn.bv_len == 0 )
+                       {
+                               *text = "SASL authentication required";
+                               return LDAP_STRONG_AUTH_REQUIRED;
+                       }
+               }
+                       
+               if( requires & SLAP_REQUIRE_AUTHC ) {
+                       if( op->o_dn.bv_len == 0 ) {
+                               *text = "authentication required";
+                               return LDAP_UNWILLING_TO_PERFORM;
+                       }
+               }
+
+               if( requires & SLAP_REQUIRE_BIND ) {
+                       int version;
+                       ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+                       version = conn->c_protocol;
+                       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+                       if( !version ) {
+                               /* no bind has occurred */
+                               *text = "BIND required";
+                               return LDAP_OPERATIONS_ERROR;
+                       }
+               }
+
+               if( requires & SLAP_REQUIRE_LDAP_V3 ) {
+                       if( op->o_protocol < LDAP_VERSION3 ) {
+                               /* no bind has occurred */
+                               *text = "operation restricted to LDAPv3 clients";
+                               return LDAP_OPERATIONS_ERROR;
+                       }
+               }
+       }
+
+       if( restrictops & opflag ) {
+               if( restrictops == SLAP_RESTRICT_OP_READS ) {
+                       *text = "read operations restricted";
+               } else {
+                       *text = "operation restricted";
+               }
+               return LDAP_UNWILLING_TO_PERFORM;
+       }
+
+       return LDAP_SUCCESS;
+}
+
+int backend_check_referrals(
+       Backend *be,
+       Connection *conn,
+       Operation *op,
+       struct berval *dn,
+       struct berval *ndn )
+{
+       int rc = LDAP_SUCCESS;
+
+       if( be->be_chk_referrals ) {
+               const char *text;
+
+               rc = be->be_chk_referrals( be,
+                       conn, op, dn, ndn, &text );
+
+               if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
+                       send_ldap_result( conn, op, rc,
+                               NULL, text, NULL, NULL );
+               }
+       }
+
+       return rc;
+}
+
 int 
 backend_group(
        Backend *be,
+       Connection *conn,
+       Operation *op,
        Entry   *target,
-       const char      *gr_ndn,
-       const char      *op_ndn,
-       const char      *objectclassValue,
-       const char      *groupattrName
+       struct berval *gr_ndn,
+       struct berval *op_ndn,
+       ObjectClass *group_oc,
+       AttributeDescription *group_at
 )
 {
-       if (be->be_group)
-               return( be->be_group(be, target, gr_ndn, op_ndn,
-                       objectclassValue, groupattrName) );
-       else
-               return(1);
+       GroupAssertion *g;
+       int i;
+
+       ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
+       i = op->o_abandon;
+       ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
+       if (i) return SLAPD_ABANDON;
+
+       if ( !dn_match( &target->e_nname, gr_ndn ) ) {
+               /* we won't attempt to send it to a different backend */
+               
+               be = select_backend( gr_ndn, 0,
+                       (be->be_flags & SLAP_BFLAG_GLUE_INSTANCE));
+
+               if (be == NULL) {
+                       return LDAP_NO_SUCH_OBJECT;
+               }
+       } 
+
+       ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+       for (g = conn->c_groups; g; g=g->next) {
+               if (g->be != be || g->oc != group_oc || g->at != group_at ||
+                   g->len != gr_ndn->bv_len)
+                       continue;
+               if (strcmp( g->ndn, gr_ndn->bv_val ) == 0)
+                       break;
+       }
+       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+       if (g)
+               return g->res;
+
+       if( be->be_group ) {
+               int res = be->be_group( be, conn, op,
+                       target, gr_ndn, op_ndn,
+                       group_oc, group_at );
+               
+               if (op->o_tag != LDAP_REQ_BIND) {
+                       g = ch_malloc(sizeof(GroupAssertion) + gr_ndn->bv_len);
+                       g->be = be;
+                       g->oc = group_oc;
+                       g->at = group_at;
+                       g->res = res;
+                       g->len = gr_ndn->bv_len;
+                       strcpy(g->ndn, gr_ndn->bv_val);
+                       ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+                       g->next = conn->c_groups;
+                       conn->c_groups = g;
+                       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+               }
+
+               return res;
+       }
+
+       return LDAP_UNWILLING_TO_PERFORM;
 }
 
-#ifdef SLAPD_SCHEMA_DN
-Attribute *backend_subschemasubentry( Backend *be )
+int 
+backend_attribute(
+       Backend *be,
+       Connection *conn,
+       Operation *op,
+       Entry   *target,
+       struct berval   *edn,
+       AttributeDescription *entry_at,
+       BerVarray *vals
+)
 {
-       /* should be backend specific */
-       static struct berval ss_val = {
-               sizeof(SLAPD_SCHEMA_DN)-1,
-               SLAPD_SCHEMA_DN };
-       static struct berval *ss_vals[2] = { &ss_val, NULL };
-       static Attribute ss_attr = {
-               "subschemasubentry",
-               ss_vals,
-               SYNTAX_DN | SYNTAX_CIS,
-               NULL
-       };
-
-       return &ss_attr;
+       if ( target == NULL || !dn_match( &target->e_nname, edn ) ) {
+               /* we won't attempt to send it to a different backend */
+               
+               be = select_backend( edn, 0,
+                       (be->be_flags & SLAP_BFLAG_GLUE_INSTANCE));
+
+               if (be == NULL) {
+                       return LDAP_NO_SUCH_OBJECT;
+               }
+       } 
+
+       if( be->be_attribute ) {
+               return be->be_attribute( be, conn, op, target, edn,
+                       entry_at, vals );
+       }
+
+       return LDAP_UNWILLING_TO_PERFORM;
 }
+
+Attribute *backend_operational(
+       Backend *be,
+       Connection *conn,
+       Operation *op,
+       Entry *e,
+       AttributeName *attrs,
+       int opattrs     )
+{
+       Attribute *a = NULL, **ap = &a;
+
+#ifdef SLAPD_SCHEMA_DN
+       *ap = slap_operational_subschemaSubentry();
+       ap = &(*ap)->a_next;
 #endif
+
+       /*
+        * If operational attributes (allegedly) are required, 
+        * and the backend supports specific operational attributes, 
+        * add them to the attribute list
+        */
+       if ( ( opattrs || attrs ) && be && be->be_operational != NULL ) {
+               ( void )be->be_operational( be, conn, op, e, attrs, opattrs, ap );
+       }
+
+       return a;
+}
+