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-rw-r--r--servers/slapd/back-dnssrv/search.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/servers/slapd/back-dnssrv/search.c b/servers/slapd/back-dnssrv/search.c
new file mode 100644
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--- /dev/null
+++ b/servers/slapd/back-dnssrv/search.c
@@ -0,0 +1,240 @@
+/* search.c - DNS SRV backend search function */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2018 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, 0 );
+
+ if( ( rc = ldap_domain2hostlist( domain, &hostlist ) ) ) {
+ Debug( LDAP_DEBUG_TRACE, "DNSSRV: domain2hostlist returned %d\n",
+ rc, 0, 0 );
+ 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: str2charrary error\n", 0, 0, 0 );
+ 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;
+ }
+ }
+
+ Statslog( 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, 0 );
+
+ 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,
+ NULL );
+
+ 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;
+}