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/* search.c - DNS SRV backend search function */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2000-2022 The OpenLDAP Foundation.
* Portions Copyright 2000-2003 Kurt D. Zeilenga.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was originally developed by Kurt D. Zeilenga for inclusion
* in OpenLDAP Software.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "slap.h"
#include "proto-dnssrv.h"
int
dnssrv_back_search(
Operation *op,
SlapReply *rs )
{
int i;
int rc;
char *domain = NULL;
char *hostlist = NULL;
char **hosts = NULL;
char *refdn;
struct berval nrefdn = BER_BVNULL;
BerVarray urls = NULL;
int manageDSAit;
rs->sr_ref = NULL;
if ( BER_BVISEMPTY( &op->o_req_ndn ) ) {
/* FIXME: need some means to determine whether the database
* is a glue instance; if we got here with empty DN, then
* we passed this same test in dnssrv_back_referrals() */
if ( !SLAP_GLUE_INSTANCE( op->o_bd ) ) {
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
rs->sr_text = "DNS SRV operation upon null (empty) DN disallowed";
} else {
rs->sr_err = LDAP_SUCCESS;
}
goto done;
}
manageDSAit = get_manageDSAit( op );
/*
* FIXME: we may return a referral if manageDSAit is not set
*/
if ( !manageDSAit ) {
send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
"manageDSAit must be set" );
goto done;
}
if( ldap_dn2domain( op->o_req_dn.bv_val, &domain ) || domain == NULL ) {
rs->sr_err = LDAP_REFERRAL;
rs->sr_ref = default_referral;
send_ldap_result( op, rs );
rs->sr_ref = NULL;
goto done;
}
Debug( LDAP_DEBUG_TRACE, "DNSSRV: dn=\"%s\" -> domain=\"%s\"\n",
op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "", domain );
if( ( rc = ldap_domain2hostlist( domain, &hostlist ) ) ) {
Debug( LDAP_DEBUG_TRACE, "DNSSRV: domain2hostlist returned %d\n",
rc );
send_ldap_error( op, rs, LDAP_NO_SUCH_OBJECT,
"no DNS SRV RR available for DN" );
goto done;
}
hosts = ldap_str2charray( hostlist, " " );
if( hosts == NULL ) {
Debug( LDAP_DEBUG_TRACE, "DNSSRV: str2charray error\n" );
send_ldap_error( op, rs, LDAP_OTHER,
"problem processing DNS SRV records for DN" );
goto done;
}
for( i=0; hosts[i] != NULL; i++) {
struct berval url;
url.bv_len = STRLENOF( "ldap://" ) + strlen(hosts[i]);
url.bv_val = ch_malloc( url.bv_len + 1 );
strcpy( url.bv_val, "ldap://" );
strcpy( &url.bv_val[STRLENOF( "ldap://" )], hosts[i] );
if( ber_bvarray_add( &urls, &url ) < 0 ) {
free( url.bv_val );
send_ldap_error( op, rs, LDAP_OTHER,
"problem processing DNS SRV records for DN" );
goto done;
}
}
Debug( LDAP_DEBUG_STATS,
"%s DNSSRV p=%d dn=\"%s\" url=\"%s\"\n",
op->o_log_prefix, op->o_protocol,
op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "", urls[0].bv_val );
Debug( LDAP_DEBUG_TRACE,
"DNSSRV: ManageDSAit scope=%d dn=\"%s\" -> url=\"%s\"\n",
op->oq_search.rs_scope,
op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
urls[0].bv_val );
rc = ldap_domain2dn(domain, &refdn);
if( rc != LDAP_SUCCESS ) {
send_ldap_error( op, rs, LDAP_OTHER,
"DNS SRV problem processing manageDSAit control" );
goto done;
} else {
struct berval bv;
bv.bv_val = refdn;
bv.bv_len = strlen( refdn );
rc = dnNormalize( 0, NULL, NULL, &bv, &nrefdn, op->o_tmpmemctx );
if( rc != LDAP_SUCCESS ) {
send_ldap_error( op, rs, LDAP_OTHER,
"DNS SRV problem processing manageDSAit control" );
goto done;
}
}
if( !dn_match( &nrefdn, &op->o_req_ndn ) ) {
/* requested dn is subordinate */
Debug( LDAP_DEBUG_TRACE,
"DNSSRV: dn=\"%s\" subordinate to refdn=\"%s\"\n",
op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
refdn == NULL ? "" : refdn );
rs->sr_matched = refdn;
rs->sr_err = LDAP_NO_SUCH_OBJECT;
send_ldap_result( op, rs );
rs->sr_matched = NULL;
} else if ( op->oq_search.rs_scope == LDAP_SCOPE_ONELEVEL ) {
send_ldap_error( op, rs, LDAP_SUCCESS, NULL );
} else {
Entry e = { 0 };
AttributeDescription *ad_objectClass
= slap_schema.si_ad_objectClass;
AttributeDescription *ad_ref = slap_schema.si_ad_ref;
e.e_name.bv_val = ch_strdup( op->o_req_dn.bv_val );
e.e_name.bv_len = op->o_req_dn.bv_len;
e.e_nname.bv_val = ch_strdup( op->o_req_ndn.bv_val );
e.e_nname.bv_len = op->o_req_ndn.bv_len;
e.e_attrs = NULL;
e.e_private = NULL;
attr_merge_one( &e, ad_objectClass, &slap_schema.si_oc_referral->soc_cname, NULL );
attr_merge_one( &e, ad_objectClass, &slap_schema.si_oc_extensibleObject->soc_cname, NULL );
if ( ad_dc ) {
char *p;
struct berval bv;
bv.bv_val = domain;
p = strchr( bv.bv_val, '.' );
if ( p == bv.bv_val ) {
bv.bv_len = 1;
} else if ( p != NULL ) {
bv.bv_len = p - bv.bv_val;
} else {
bv.bv_len = strlen( bv.bv_val );
}
attr_merge_normalize_one( &e, ad_dc, &bv, NULL );
}
if ( ad_associatedDomain ) {
struct berval bv;
ber_str2bv( domain, 0, 0, &bv );
attr_merge_normalize_one( &e, ad_associatedDomain, &bv, NULL );
}
attr_merge_normalize_one( &e, ad_ref, urls, NULL );
rc = test_filter( op, &e, op->oq_search.rs_filter );
if( rc == LDAP_COMPARE_TRUE ) {
rs->sr_entry = &e;
rs->sr_attrs = op->oq_search.rs_attrs;
rs->sr_flags = REP_ENTRY_MODIFIABLE;
send_search_entry( op, rs );
rs->sr_entry = NULL;
rs->sr_attrs = NULL;
rs->sr_flags = 0;
}
entry_clean( &e );
rs->sr_err = LDAP_SUCCESS;
send_ldap_result( op, rs );
}
free( refdn );
if ( nrefdn.bv_val ) free( nrefdn.bv_val );
done:
if( domain != NULL ) ch_free( domain );
if( hostlist != NULL ) ch_free( hostlist );
if( hosts != NULL ) ldap_charray_free( hosts );
if( urls != NULL ) ber_bvarray_free( urls );
return 0;
}
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