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      1 /*	$NetBSD: frontend.c,v 1.4 2025/09/05 21:16:25 christos Exp $	*/
      2 
      3 /* frontend.c - routines for dealing with frontend */
      4 /* $OpenLDAP$ */
      5 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
      6  *
      7  * Copyright 1998-2024 The OpenLDAP Foundation.
      8  * All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted only as authorized by the OpenLDAP
     12  * Public License.
     13  *
     14  * A copy of this license is available in the file LICENSE in the
     15  * top-level directory of the distribution or, alternatively, at
     16  * <http://www.OpenLDAP.org/license.html>.
     17  */
     18 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
     19  * All rights reserved.
     20  *
     21  * Redistribution and use in source and binary forms are permitted
     22  * provided that this notice is preserved and that due credit is given
     23  * to the University of Michigan at Ann Arbor. The name of the University
     24  * may not be used to endorse or promote products derived from this
     25  * software without specific prior written permission. This software
     26  * is provided ``as is'' without express or implied warranty.
     27  */
     28 
     29 
     30 #include <sys/cdefs.h>
     31 __RCSID("$NetBSD: frontend.c,v 1.4 2025/09/05 21:16:25 christos Exp $");
     32 
     33 #include "portable.h"
     34 
     35 #include <stdio.h>
     36 
     37 #include <ac/string.h>
     38 #include <ac/socket.h>
     39 #include <sys/stat.h>
     40 
     41 #include "slap.h"
     42 #include "lutil.h"
     43 #include "lber_pvt.h"
     44 
     45 #include "ldap_rq.h"
     46 
     47 static BackendInfo	slap_frontendInfo;
     48 static BackendDB	slap_frontendDB;
     49 BackendDB	*frontendDB;
     50 
     51 static int
     52 fe_entry_get_rw(
     53 	Operation *op,
     54 	struct berval *ndn,
     55 	ObjectClass *oc,
     56 	AttributeDescription *at,
     57 	int rw,
     58 	Entry **e )
     59 {
     60 	BackendDB	*bd;
     61 	int		rc = LDAP_NO_SUCH_OBJECT;
     62 
     63 	bd = op->o_bd;
     64 	op->o_bd = select_backend( ndn, 0 );
     65 	if ( op->o_bd != NULL ) {
     66 		if ( op->o_bd->be_fetch ) {
     67 			rc = op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
     68 		}
     69 	}
     70 	op->o_bd = bd;
     71 
     72 	return rc;
     73 }
     74 
     75 static int
     76 fe_entry_release_rw(
     77 	Operation *op,
     78 	Entry *e,
     79 	int rw )
     80 {
     81 	BackendDB	*bd;
     82 	int		rc = LDAP_NO_SUCH_OBJECT;
     83 
     84 	bd = op->o_bd;
     85 	op->o_bd = select_backend( &e->e_nname, 0 );
     86 	if ( op->o_bd != NULL ) {
     87 		if ( op->o_bd->be_release ) {
     88 			rc = op->o_bd->be_release( op, e, rw );
     89 		}
     90 	}
     91 	op->o_bd = bd;
     92 
     93 	return rc;
     94 }
     95 
     96 int
     97 frontend_init( void )
     98 {
     99 	/* data */
    100 	frontendDB = &slap_frontendDB;
    101 	frontendDB->bd_self = frontendDB;
    102 
    103 	/* ACLs */
    104 	frontendDB->be_dfltaccess = ACL_READ;
    105 
    106 	/* limits */
    107 	frontendDB->be_def_limit.lms_t_soft = SLAPD_DEFAULT_TIMELIMIT;	/* backward compatible limits */
    108 	frontendDB->be_def_limit.lms_t_hard = 0;
    109 	frontendDB->be_def_limit.lms_s_soft = SLAPD_DEFAULT_SIZELIMIT;	/* backward compatible limits */
    110 	frontendDB->be_def_limit.lms_s_hard = 0;
    111 	frontendDB->be_def_limit.lms_s_unchecked = -1;			/* no limit on unchecked size */
    112 	frontendDB->be_def_limit.lms_s_pr = 0;				/* page limit */
    113 	frontendDB->be_def_limit.lms_s_pr_hide = 0;			/* don't hide number of entries left */
    114 	frontendDB->be_def_limit.lms_s_pr_total = 0;			/* number of total entries returned by pagedResults equal to hard limit */
    115 
    116 	ldap_pvt_thread_mutex_init( &frontendDB->be_pcsn_st.be_pcsn_mutex );
    117 
    118 	/* suffix */
    119 	frontendDB->be_suffix = ch_calloc( 2, sizeof( struct berval ) );
    120 	ber_str2bv( "", 0, 1, &frontendDB->be_suffix[0] );
    121 	BER_BVZERO( &frontendDB->be_suffix[1] );
    122 	frontendDB->be_nsuffix = ch_calloc( 2, sizeof( struct berval ) );
    123 	ber_str2bv( "", 0, 1, &frontendDB->be_nsuffix[0] );
    124 	BER_BVZERO( &frontendDB->be_nsuffix[1] );
    125 
    126 	/* info */
    127 	frontendDB->bd_info = &slap_frontendInfo;
    128 
    129 	SLAP_BFLAGS(frontendDB) |= SLAP_BFLAG_FRONTEND;
    130 
    131 	/* name */
    132 	frontendDB->bd_info->bi_type = "frontend";
    133 
    134 	/* known controls */
    135 	{
    136 		int	i;
    137 
    138 		frontendDB->bd_info->bi_controls = slap_known_controls;
    139 
    140 		for ( i = 0; slap_known_controls[ i ]; i++ ) {
    141 			int	cid;
    142 
    143 			if ( slap_find_control_id( slap_known_controls[ i ], &cid )
    144 					== LDAP_CONTROL_NOT_FOUND )
    145 			{
    146 				assert( 0 );
    147 				return -1;
    148 			}
    149 
    150 			frontendDB->bd_info->bi_ctrls[ cid ] = 1;
    151 			frontendDB->be_ctrls[ cid ] = 1;
    152 		}
    153 	}
    154 
    155 	/* calls */
    156 	frontendDB->bd_info->bi_op_abandon = fe_op_abandon;
    157 	frontendDB->bd_info->bi_op_add = fe_op_add;
    158 	frontendDB->bd_info->bi_op_bind = fe_op_bind;
    159 	frontendDB->bd_info->bi_op_compare = fe_op_compare;
    160 	frontendDB->bd_info->bi_op_delete = fe_op_delete;
    161 	frontendDB->bd_info->bi_op_modify = fe_op_modify;
    162 	frontendDB->bd_info->bi_op_modrdn = fe_op_modrdn;
    163 	frontendDB->bd_info->bi_op_search = fe_op_search;
    164 	frontendDB->bd_info->bi_extended = fe_extended;
    165 	frontendDB->bd_info->bi_operational = fe_aux_operational;
    166 	frontendDB->bd_info->bi_entry_get_rw = fe_entry_get_rw;
    167 	frontendDB->bd_info->bi_entry_release_rw = fe_entry_release_rw;
    168 	frontendDB->bd_info->bi_access_allowed = fe_access_allowed;
    169 	frontendDB->bd_info->bi_acl_group = fe_acl_group;
    170 	frontendDB->bd_info->bi_acl_attribute = fe_acl_attribute;
    171 
    172 #if 0
    173 	/* FIXME: is this too early? */
    174 	return backend_startup_one( frontendDB );
    175 #endif
    176 
    177 	return 0;
    178 }
    179 
    180