1/* $OpenLDAP$ */ 2/* This work is part of OpenLDAP Software <http://www.openldap.org/>. 3 * 4 * Copyright 1999-2011 The OpenLDAP Foundation. 5 * Portions Copyright 2001-2003 Pierangelo Masarati. 6 * Portions Copyright 1999-2003 Howard Chu. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted only as authorized by the OpenLDAP 11 * Public License. 12 * 13 * A copy of this license is available in the file LICENSE in the 14 * top-level directory of the distribution or, alternatively, at 15 * <http://www.OpenLDAP.org/license.html>. 16 */ 17/* ACKNOWLEDGEMENTS: 18 * This work was initially developed by the Howard Chu for inclusion 19 * in OpenLDAP Software and subsequently enhanced by Pierangelo 20 * Masarati. 21 */ 22 23#include "portable.h" 24 25#include <stdio.h> 26 27#include <ac/string.h> 28#include <ac/socket.h> 29 30#include "slap.h" 31#include "../back-ldap/back-ldap.h" 32#include "back-meta.h" 33 34int 35meta_back_compare( Operation *op, SlapReply *rs ) 36{ 37 metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private; 38 metatarget_t *mt; 39 metaconn_t *mc; 40 int rc = 0; 41 int candidate = -1; 42 struct berval mdn = BER_BVNULL; 43 dncookie dc; 44 struct berval mapped_attr = op->orc_ava->aa_desc->ad_cname; 45 struct berval mapped_value = op->orc_ava->aa_value; 46 int msgid; 47 ldap_back_send_t retrying = LDAP_BACK_RETRYING; 48 LDAPControl **ctrls = NULL; 49 50 mc = meta_back_getconn( op, rs, &candidate, LDAP_BACK_SENDERR ); 51 if ( !mc || !meta_back_dobind( op, rs, mc, LDAP_BACK_SENDERR ) ) { 52 return rs->sr_err; 53 } 54 55 assert( mc->mc_conns[ candidate ].msc_ld != NULL ); 56 57 /* 58 * Rewrite the modify dn, if needed 59 */ 60 mt = mi->mi_targets[ candidate ]; 61 dc.target = mt; 62 dc.conn = op->o_conn; 63 dc.rs = rs; 64 dc.ctx = "compareDN"; 65 66 switch ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) { 67 case LDAP_UNWILLING_TO_PERFORM: 68 rc = 1; 69 goto cleanup; 70 71 default: 72 break; 73 } 74 75 /* 76 * if attr is objectClass, try to remap the value 77 */ 78 if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass ) { 79 ldap_back_map( &mt->mt_rwmap.rwm_oc, 80 &op->orc_ava->aa_value, 81 &mapped_value, BACKLDAP_MAP ); 82 83 if ( BER_BVISNULL( &mapped_value ) || BER_BVISEMPTY( &mapped_value ) ) { 84 goto cleanup; 85 } 86 87 /* 88 * else try to remap the attribute 89 */ 90 } else { 91 ldap_back_map( &mt->mt_rwmap.rwm_at, 92 &op->orc_ava->aa_desc->ad_cname, 93 &mapped_attr, BACKLDAP_MAP ); 94 if ( BER_BVISNULL( &mapped_attr ) || BER_BVISEMPTY( &mapped_attr ) ) { 95 goto cleanup; 96 } 97 98 if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) 99 { 100 dc.ctx = "compareAttrDN"; 101 102 switch ( ldap_back_dn_massage( &dc, &op->orc_ava->aa_value, &mapped_value ) ) 103 { 104 case LDAP_UNWILLING_TO_PERFORM: 105 rc = 1; 106 goto cleanup; 107 108 default: 109 break; 110 } 111 } 112 } 113 114retry:; 115 ctrls = op->o_ctrls; 116 rc = meta_back_controls_add( op, rs, mc, candidate, &ctrls ); 117 if ( rc != LDAP_SUCCESS ) { 118 send_ldap_result( op, rs ); 119 goto cleanup; 120 } 121 122 rs->sr_err = ldap_compare_ext( mc->mc_conns[ candidate ].msc_ld, mdn.bv_val, 123 mapped_attr.bv_val, &mapped_value, 124 ctrls, NULL, &msgid ); 125 126 rs->sr_err = meta_back_op_result( mc, op, rs, candidate, msgid, 127 mt->mt_timeout[ SLAP_OP_COMPARE ], ( LDAP_BACK_SENDRESULT | retrying ) ); 128 if ( rs->sr_err == LDAP_UNAVAILABLE && retrying ) { 129 retrying &= ~LDAP_BACK_RETRYING; 130 if ( meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_SENDERR ) ) { 131 /* if the identity changed, there might be need to re-authz */ 132 (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls ); 133 goto retry; 134 } 135 } 136 137cleanup:; 138 (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls ); 139 140 if ( mdn.bv_val != op->o_req_dn.bv_val ) { 141 free( mdn.bv_val ); 142 } 143 144 if ( op->orc_ava->aa_value.bv_val != mapped_value.bv_val ) { 145 free( mapped_value.bv_val ); 146 } 147 148 if ( mc ) { 149 meta_back_release_conn( mi, mc ); 150 } 151 152 return rs->sr_err; 153} 154 155