1 /* $NetBSD: compare.c,v 1.2 2020/08/11 13:15:40 christos Exp $ */ 2 3 /* $OpenLDAP$ */ 4 /* This work is part of OpenLDAP Software <http://www.openldap.org/>. 5 * 6 * Copyright 1999-2020 The OpenLDAP Foundation. 7 * Portions Copyright 2001-2003 Pierangelo Masarati. 8 * Portions Copyright 1999-2003 Howard Chu. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted only as authorized by the OpenLDAP 13 * Public License. 14 * 15 * A copy of this license is available in the file LICENSE in the 16 * top-level directory of the distribution or, alternatively, at 17 * <http://www.OpenLDAP.org/license.html>. 18 */ 19 /* ACKNOWLEDGEMENTS: 20 * This work was initially developed by the Howard Chu for inclusion 21 * in OpenLDAP Software and subsequently enhanced by Pierangelo 22 * Masarati. 23 */ 24 25 #include <sys/cdefs.h> 26 __RCSID("$NetBSD: compare.c,v 1.2 2020/08/11 13:15:40 christos Exp $"); 27 28 #include "portable.h" 29 30 #include <stdio.h> 31 32 #include <ac/string.h> 33 #include <ac/socket.h> 34 35 #include "slap.h" 36 #include "../back-ldap/back-ldap.h" 37 #include "back-meta.h" 38 39 int 40 meta_back_compare( Operation *op, SlapReply *rs ) 41 { 42 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private; 43 metatarget_t *mt; 44 metaconn_t *mc; 45 int rc = 0; 46 int candidate = -1; 47 struct berval mdn = BER_BVNULL; 48 dncookie dc; 49 struct berval mapped_attr = op->orc_ava->aa_desc->ad_cname; 50 struct berval mapped_value = op->orc_ava->aa_value; 51 int msgid; 52 ldap_back_send_t retrying = LDAP_BACK_RETRYING; 53 LDAPControl **ctrls = NULL; 54 55 mc = meta_back_getconn( op, rs, &candidate, LDAP_BACK_SENDERR ); 56 if ( !mc || !meta_back_dobind( op, rs, mc, LDAP_BACK_SENDERR ) ) { 57 return rs->sr_err; 58 } 59 60 assert( mc->mc_conns[ candidate ].msc_ld != NULL ); 61 62 /* 63 * Rewrite the modify dn, if needed 64 */ 65 mt = mi->mi_targets[ candidate ]; 66 dc.target = mt; 67 dc.conn = op->o_conn; 68 dc.rs = rs; 69 dc.ctx = "compareDN"; 70 71 switch ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) { 72 case LDAP_UNWILLING_TO_PERFORM: 73 rc = 1; 74 goto cleanup; 75 76 default: 77 break; 78 } 79 80 /* 81 * if attr is objectClass, try to remap the value 82 */ 83 if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass ) { 84 ldap_back_map( &mt->mt_rwmap.rwm_oc, 85 &op->orc_ava->aa_value, 86 &mapped_value, BACKLDAP_MAP ); 87 88 if ( BER_BVISNULL( &mapped_value ) || BER_BVISEMPTY( &mapped_value ) ) { 89 goto cleanup; 90 } 91 92 /* 93 * else try to remap the attribute 94 */ 95 } else { 96 ldap_back_map( &mt->mt_rwmap.rwm_at, 97 &op->orc_ava->aa_desc->ad_cname, 98 &mapped_attr, BACKLDAP_MAP ); 99 if ( BER_BVISNULL( &mapped_attr ) || BER_BVISEMPTY( &mapped_attr ) ) { 100 goto cleanup; 101 } 102 103 if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) 104 { 105 dc.ctx = "compareAttrDN"; 106 107 switch ( ldap_back_dn_massage( &dc, &op->orc_ava->aa_value, &mapped_value ) ) 108 { 109 case LDAP_UNWILLING_TO_PERFORM: 110 rc = 1; 111 goto cleanup; 112 113 default: 114 break; 115 } 116 } 117 } 118 119 retry:; 120 ctrls = op->o_ctrls; 121 rc = meta_back_controls_add( op, rs, mc, candidate, &ctrls ); 122 if ( rc != LDAP_SUCCESS ) { 123 send_ldap_result( op, rs ); 124 goto cleanup; 125 } 126 127 rs->sr_err = ldap_compare_ext( mc->mc_conns[ candidate ].msc_ld, mdn.bv_val, 128 mapped_attr.bv_val, &mapped_value, 129 ctrls, NULL, &msgid ); 130 131 rs->sr_err = meta_back_op_result( mc, op, rs, candidate, msgid, 132 mt->mt_timeout[ SLAP_OP_COMPARE ], ( LDAP_BACK_SENDRESULT | retrying ) ); 133 if ( rs->sr_err == LDAP_UNAVAILABLE && retrying ) { 134 retrying &= ~LDAP_BACK_RETRYING; 135 if ( meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_SENDERR ) ) { 136 /* if the identity changed, there might be need to re-authz */ 137 (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls ); 138 goto retry; 139 } 140 } 141 142 cleanup:; 143 (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls ); 144 145 if ( mdn.bv_val != op->o_req_dn.bv_val ) { 146 free( mdn.bv_val ); 147 } 148 149 if ( op->orc_ava->aa_value.bv_val != mapped_value.bv_val ) { 150 free( mapped_value.bv_val ); 151 } 152 153 if ( mc ) { 154 meta_back_release_conn( mi, mc ); 155 } 156 157 return rs->sr_err; 158 } 159 160